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NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
RoHS Compliant

SLIN-30E1AL Features

Rev.C
Wide Input Voltage Range High Efficiency Monotonic start-up Remote On/Off Remote Sense
TM
Output voltage sequencing Over Temperature Protection Output Over Current Protection Startup into pre-biased output
Tunable Loop (a registered trademark of Lineage Power Systems) to Optimize Dynamic output voltage response Parallel operation with active current sharing Class 2, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592) Compliant to RoHS EU Directive 2002/95/EC UL* 60950 Recognized, CSA C22.2 No. 60950-00 Certified VDE 0805 (EN60950-1 3 edition) Licensed
rd
Applications
Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Servers and storage applications Networking equipment
Description
The SLIN-30E1AL power modules are non-isolated dc-dc converters that can deliver up to 30 A of output current. These modules operate over a wide range of input voltage (VIN = 6 Vdc - 14 Vdc) and provide a precisely regulated output voltage from 0.8 Vdc to 3.63 Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, over current and over temperature protection, output voltage TM sequencing and paralleling with active current sharing. A new feature, the Tunable Loop , allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area.
Part Selection
Output Voltage 0.8 Vdc - 3.63 Vdc Input Voltage 6.0 Vdc - 14 Vdc Max. Output Current 30 A Typical Efficiency 92.9% Model Number Active Low SLIN-30E1AL
Notes: Add "G" suffix at the end of the model number to indicate Tray Packaging.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
1
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Part Number Explanation
S LIN - 30 E 1A L
1 2 34 5 6 4--- Wide input voltage range (6.0-14V) 5--- Wide output voltage range (0.8-3.63V) 6--- Enable, active low
1---Surface mount 2---Series code 3---Output current (30A)
Absolute Maximum Ratings
Parameter Continuous Input Voltage Sequencing Voltage Operating Ambient Temperature Storage Temperature Min -0.3 -0.3 -40 -55 Typ Max 15 15 85 125 Unit V V C C Notes
Note: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Input Specifications
Parameter Operating Input Voltage Input Current (full load) Input Current (no load) Input Stand-by Current Input Reflected Ripple Current (pk-pk) I t Inrush Current Transient Input Ripple Rejection (120Hz) Turn-on Threshold Turn-off Threshold
2
Min 6.0 -
Typ 12 91 265 20 100 50 5.5 5.0
Max 14 19 1 -
Unit V A mA mA mA mA As dB V V
2
Notes VIN= VIN,min, Vo=VO,set, IO = IO,max Vo=0.8V, VIN=12V, IO=0, module enabled Vo=3.3V, VIN=12V, IO=0, module enabled VIN = 12V, module disabled 5Hz to 20MHz, 1H source impedance; VIN =6.0 to 14V, IO= IOmax
-
CAUTION: This converter is not internally fused. An input line fuse must be used in application. This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a time-delay fuse with a maximum rating of 30A in the ungrounded input lead. Refer to the fuse manufacturer's data sheet for further information. Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Output Specifications
Parameter Output Voltage Set Point Output Voltage Adjustment Range Remote Sense Range Load Regulation Line Regulation Temperature Regulation (-40C to 85C) Ripple and Noise (pk-pk) Output Current Range Output DC Current Limit Output Short-Circuit Current Output Capacitance ESR 1 m ESR0.15 m ESR 10 m Min -1.5 -3.0 0.8 0 0 0 0 Turn-On Delay Time 2.5 5 mS Typ 0.5 140 3.5 2.5 Max +1.5 +3.0 3.63 0.5 10 10 1 50 30 200 1000 10000 5 Unit %Vo,set %Vo,set V V mV mV %Vo,set mV A %Io,max A uF uF uF mS Hiccup Mode Vo250mV, Hiccup Mode Without the Tunable Loop TM With the Tunable Loop TM With the Tunable Loop
TM
Notes VIN=VIN,nom, IO=IO, nom, Tref=25C. Over all operating input voltage, resistive load, and temperature conditions until end of life selected by an external resistor
IO=IO, min to IO, max VIN=VIN, min to VIN, max Tref=TA, min to TA, max 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max, Co = 0.1F // 47 F ceramic capacitors
Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo =10% of Vo, set) Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo =10% of Vo, set) time for Vo to rise from 10% of Vo, set to 90% of Vo, set Vin=Vin, min to Vin, max, Io=Io, max, Ta=25C With or without maximum external capacitance
Output voltage Rise time Output voltage overshoot
2 -
-
10 3
mS %Vo,set
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
3
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
General Specifications
Parameter Efficiency Vo=0.8V Vo=1.2V Vo=1.8V Vo=2.5V Vo=3.3V Switching Frequency Over Temperature Protection Sequencing Slew rate capability Sequencing Delay time Tracking Accuracy Power-Up: 2V/ms Power-Down: 1V/ms Forced Load Share Accuracy Number of Units in Parallel Weight 7.04 10 83.0 87.1 90.1 91.8 92.9 300 125 100 200 10 2 200 400 5 g Calculated MTBF (Vin=12V, Io=80% full load, Vo=2.5V, Ta=40C, 200LFM) per Telecordia Method Issue 2, Method I Case 3 % % % % % kHz C V/mS mS mV mV %Io VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo Delay from VIN, min to application of voltage on SEQ pin VIN, min to VIN, max; IO, min - IO, max VSEQ < Vo Vin= 12Vdc, Ta=25C Io=Io, max , Vo= Vo,set Min Typ Max Unit Notes
MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H)
4,443,300
hours
1.30 x 0.53 x 0.39 33.02 x 13.46 x 10.0
-
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
4
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Efficiency Data
95
95
90
90
EFFICIENCY, (%)
85
EFFICIENCY, (%)
85 Vin=12V 80 Vin=6V 75 Vin=14V
80 Vin=12V 75 Vin=6V
Vin=14V
70 0 5 10 15 20 25 30
70 0 5 10 15 20 25 30
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, IO (A)
Vo=0.8V, Ta=25C
95
100 95
Vo=1.2V, Ta=25C
90
EFFICIENCY, (%)
EFFICIENCY, (%)
90 85 Vin=12V 80 75 70 Vin=6V Vin=14V
85 Vin=12V 80 Vin=6V Vin=14V
75
70 0 5 10 15 20 25 30
0
5
10
15
20
25
30
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, IO (A)
Vo=1.8V, Ta=25C
100 95
Vo=2.5V, Ta=25C
EFFICIENCY, (%)
90 85 Vin=12V 80 75 70 0 5 10 15 20 25 30 Vin=6V Vin=14V
OUTPUT CURRENT, IO (A)
Vo=3.3V, Ta=25C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
5
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Thermal Derating Curves
35 30
1m/s (200LFM)
35 30
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
25 20 15 10 5 0 35 45 55 65 75 85
NC
25 20 15 10 5 0 35 45 55 65 75 85
NC
1m/s (200LFM)
0.5m/s (100LFM)
0.5m/s (100LFM)
AMBIENT TEMPERATURE, TA OC
AMBIENT TEMPERATURE, TA OC
Vo=0.8V, Vin=12V
35 30
2m/s (400LFM)
Vo=1.2V, Vin=12V
35 30
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
25
NC
25 20 15 10 5 0 35 45 55 65
O
20 15 10 5 0 35 45 55
0.5m/s (100LFM) 1m/s (200LFM)
NC
0.5m/s (100LFM) 1m/s (200LFM) 1.5m/s (300LFM) 2m/s (400LFM)
1.5m/s (300LFM)
65
O
75
85
75
85
AMBIENT TEMPERATURE, TA C
AMBIENT TEMPERATURE, TA C
Vo=1.8V, Vin=12V
35 30
Vo=2.5V, Vin=12V
OUTPUT CURRENT, Io (A)
25 20 15 10 5 0 0 20 40 60 80
AMBIENT TEMPERATURE, TA OC
Vo=3.3V, Vin=12V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
6
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Ripple and Noise Waveforms
OUTPUT VOLTAGE VO (V) (20mV/div)
OUTPUT VOLTAGE VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (1s/div)
Vo=0.8V, Ta=25C , Vin=12V, Io = Io,max Cout = 0.1F // 47 F ceramic capacitors
Vo=1.2V, Ta=25C , Vin=12V, Io = Io,max COUT = 0.1F // 47 F ceramic capacitors
OUTPUT VOLTAGE VO (V) (20mV/div)
OUTPUT VOLTAGE VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (1s/div)
Vo=1.8V, Ta=25C , Vin=12V, Io = Io,max COUT = 0.1F // 47 F ceramic capacitors
Vo=2.5V, Ta=25C , Vin=12V, Io = Io,max COUT = 0.1F // 47 F ceramic capacitors
OUTPUT VOLTAGE VO (V) (20mV/div)
TIME, t (1s/div)
Vo=3.3V, Ta=25C , Vin=12V, Io = Io,max COUT = 0.1F // 47 F ceramic capacitors
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
7
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Transient Response Waveforms
OUTPUT VOLTAGE VO (V) (200mV/div) OUTPUT VOLTAGE VO (V) (200mV/div)
OUTPUT CURRENT, IO (A) (5Adiv)
TIME, t (20s /div)
OUTPUT CURRENT, IO (A) (5Adiv)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=0.8V, Ta=25C , Vin=12V
OUTPUT VOLTAGE VO (V) (200mV/div)
Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=1.2V, Ta=25C , Vin=12V
OUTPUT VOLTAGE VO (V) (200mV/div)
OUTPUT CURRENT, IO (A) (5Adiv)
TIME, t (20s /div)
OUTPUT CURRENT, IO (A) (5Adiv)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=1.8V, Ta=25C , Vin=12V
OUTPUT VOLTAGE VO (V) (200mV/div)
Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=2.5V, Ta=25C , Vin=12V
OUTPUT CURRENT, IO (A) (5Adiv)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=3.3V, Ta=25C , Vin=12V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
8
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Startup Time
ON/OFF VOLTAGE VON/OFF (V) (5V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div)
OUTPUT VOLTAGE Vo (V) (200mV/div)
TIME, t (2 ms/div)
OUTPUT VOLTAGE Vo (V) (500mV/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max) Vo=0.8V, Ta=25C
ON/OFF VOLTAGE VON/OFF (V) (5V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE Vo (V) 1V/div) VON/OFF (V) (5V/div)
Start-up Using On/Off Voltage (Io = Io,max) Vo=1.2V, Ta=25C
OUTPUT VOLTAGE Vo (V) (500mV/div)
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max) Vo=1.8V, Ta=25C
OUTPUT VOLTAGE ON/OFF VOLTAGE Vo (V) (1V/div) VON/OFF (V) (2V/div)
Start-up Using On/Off Voltage (Io = Io,max) Vo=2.5V, Ta=25C
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max) Vo=3.3V, Ta=25C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
9
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Startup Time (continued)
INPUT VOLTAGE VIN (V) (5V/div)
OUTPUT VOLTAGE Vo(V) (200mV/div)
TIME, t (2 ms/div)
OUTPUT VOLTAGE Vo(V) (500mV/div)
INPUT VOLTAGE VIN (V) (5V/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 14V, Io = Io,max ), Vo=0.8V, Ta=25C
INPUT VOLTAGE VIN (V) (5V/div)
Start-up Using Input Voltage (VIN = 14V, Io = Io,max ), Vo=1.2V, Ta=25C
INPUT VOLTAGE VIN (V) (5V/div)
OUTPUT VOLTAGE Vo(V) (500mV/div)
TIME, t (2 ms/div)
OUTPUT VOLTAGE Vo(V) (1V/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 14V, Io = Io,max ), Vo=1.8V, Ta=25C
INPUT VOLTAGE VIN (V) (5V/div)
Start-up Using Input Voltage (VIN = 14V, Io = Io,max ), Vo=2.5V, Ta=25C
OUTPUT VOLTAGE Vo(V) (1V/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 14V, Io = Io,max ), Vo=3.3V, Ta=25C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
10
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Test Configurations
Input Reflected Ripple Current Test Setup.
TO OSCILLOSCOPE LTEST VIN(+) 1H CURRENT PROBE
BATTERY
CS
220F
CIN Min 150F
E.S.R.<0.1 @ 20C 100kHz
COM
NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1H. Capacitor CS offsets possible battery impedance. Measure current as shown above.
Output Ripple and Noise Test Setup.
COPPER STRIP VO (+) 1uF COM . 10uF SCOPE RESISTIVE LOAD
GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance.
Output Voltage and Efficiency Test Setup.
Rdistribution
Rcontact VIN(+) VO
Rcontact
Rdistribution
VIN
VO
RLOAD
Rdistribution
Rcontact COM COM
Rcontact
Rdistribution
NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance.
VO. IO Efficiency = VIN. IIN x 100 %
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
11
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Input Filtering
The SLIN-30E1AL module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitor must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the module. The figure below shows the input ripple voltage for various output voltages at 30A of load current with 1x22F, 2x22 F or 2x47 F ceramic capacitors and an input of 12V.
Input Ripple Voltage (mVp-p) (mVp-p)
400 350 300 250 200 150 100 50 0 0.5 1 1.5 2 2.5 3 1x22uF 2x22uF 2x47uF
Output Voltage (Vdc) Output Filtering
The SLIN-30E1AL modules are designed for low output ripple voltage and will meet the maximum output ripple specification with no external capacitors. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR ceramic and polymer are recommended to improve the dynamic response of the module. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable Loop feature described later in this data sheet. The figure below shows the output ripple voltage for various output voltages at 30A of load current with external 1x10F, 1x47 F, 2x47 F or 4x47 F ceramic capacitors and an input of 12V.
140 120
Ripple (mVp-p)
100 80 60 40 20 0 0.5 1
1x10uF 1x47uF 2x47uF 4x47uF
External External External External
Cap Cap Cap Cap
1.5 2 2.5 Output Voltage (Volts)
3
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
12
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1 2nd Edition, CSA C22.2 No. 60950-1-07, and VDE 0805-1+A11:2009-11 (DIN EN60950-1 2nd Edition) Licensed. The SLIN-30E1AL was tested using a 30A, time delay fuse in the ungrounded input. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a time-delay fuse with a maximum rating of 30A in the positive input lead.
Remote On/Off
Parameter Signal Low (Unit On) Signal High (Unit Off) Active Low Min -0.3 3.0 Typ Max 1.2 Vin,max Unit V V Notes The remote on/off pin open, Unit off.
The SLIN-30E1AL power modules feature an On/Off pin for remote On/Off operation. If not using the On/Off pin, connect the pin to ground (the module will be ON). The On/Off signal (V on/off) is referenced to ground. The circuit configuration for remote On/Off operation of the module using the On/Off pin is shown below. During a Logic High on the On/Off pin (transistor Q1 is OFF), the module remains OFF. The external resistor R1 should be chosen to maintain 3.0V minimum on the On/Off pin to ensure that the module is OFF when transistor Q1 is in the OFF state. Suitable values for R1 are 4.7K for input voltage of 12V and 3K for 5Vin. During LogicLow when Q1 is turned ON, the module is turned ON. The On/Off pin can also be used to synchronize the output voltage start-up and shutdown of multiple modules in parallel. By connecting On/Off pins of multiple modules, the output start-up can be synchronized (please refer to characterization curves). When On/Off pins are connected together, all modules will shutdown if any one of the modules gets disabled due to under voltage lockout or over temperature protection
VIN+
MODULE
Thermal SD R1 PWM Enable I ON/OFF
ON/OFF + VON/OFF Q1 100K GND _ 1K 100K
Remote On/Off Implementation using ON/OFF
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
13
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range.
Over Temperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shutdown if the over temperature threshold of 125C is exceeded at the thermal reference point Tref. The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart.
Input Under-voltage Lockout
At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the under voltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the SLIN-30E1AL can be programmed to any voltage from 0.8dc to 3.63Vdc by connecting a resistor (shown as Rtrim in the figure below) between Trim and GND pins of the module. Without an external resistor between Trim and GND pins, the output of the module will be 0.8Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:
8000 Rtrim Vo 0.8
Rtrim is the external resistor in Vo is the desired output voltage By using a 0.5% tolerance trim resistor with a TC of 100ppm, a set point tolerance of 1.5% can be achieved as specified in the electrical specification. Table 1 provides Rtrim values required for some common output voltages. Table 1 VO, set (V) 0.8 1.0 1.2 1.5 1.8 2.5 3.3 Rtrim (K) Open 40 20 11.429 8 4.706 3.2
V I N(+) V O( +) SENS E ON/OF F TRIM R tr im G ND LOAD
Circuit configuration to program output voltage using an external resistor
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
14
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Remote Sense
The SLIN-30E1AL power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed 0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect the SENSE pin to the VOUT pin.
Voltage Margining
Output voltage margining can be implemented in the SLIN-30E1AL modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. The figure below shows the circuit configuration for output voltage margining.
Vo Rmargin-down
MODULE
Q2 Trim Rmargin-up Rtrim
Q1 GND
Circuit Configuration for margining Output voltage
Monotonic Start-up and Shutdown
The SLIN-30E1AL modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range.
Startup into Pre-biased Output
The SLIN-30E1AL modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
15
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Output Voltage Sequencing
The SLIN-30E1AL modules include a sequencing feature that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected. When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin. For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required before applying voltage on the SEQ pin. This delay gives the module enough time to complete its internal power-up softstart cycle. During the delay time, the SEQ pin should be held close to ground (nominally 50mV 20 mV). This is required to keep the internal op-amp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1 according to the following equation:
R1
24950 ohms V IN 0.05
the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero.
VIN+
MODULE
499K + OUT R1 SEQ 10K
GND
Circuit showing connection of the sequencing signal to the SEQ pin After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt basis until the output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. When using the sequencing feature to control start-up of the module, pre-bias immunity during start-up is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during startup. When using the sequencing feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during start-up is required, the sequencing feature must be disabled. For additional guidelines on using the sequencing feature please contact the Bel Power technical representatives for additional information.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
16
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Active Load Sharing
For additional power requirements, the SLIN-30E1AL power module is also available with a parallel option. Up to five modules can be configured, in parallel, with active load sharing. Good layout techniques should be observed when using multiple units in parallel. To implement forced load sharing, the following connections should be made: The share pins of all units in parallel must be connected together. The path of these connections should be as direct as possible. All remote-sense pins should be connected to the power bus at the same point, i.e., connect all the SENSE(+) pins to the (+) side of the bus. Close proximity and directness are necessary for good noise immunity.
Some special considerations apply for design of converters in parallel operation: When sizing the number of modules required for parallel operation, take note of the fact that current sharing has some tolerance. In addition, under transient conditions such as a dynamic load change and during startup, all converter output currents will not be equal. To allow for such variation and avoid the likelihood of a converter shutting off due to a current overload, the total capacity of the paralleled system should be no more than 75% of the sum of the individual converters. As an example, for a system of four SLIN-30E1AL converters in parallel, the total current drawn should be less that 75% of (4 x 30A) , i.e. less than 90A. All modules should be turned on and off together. This is so that all modules come up at the same time avoiding the problem of one converter sourcing current into the other leading to an over current trip condition. To ensure that all modules come up simultaneously, the on/off pins of all paralleled converters should be tied together and the converters enabled and disabled using the on/off pin. The share bus is not designed for redundant operation and the system will be non-functional upon failure of one of the unit when multiple units are in parallel. In particular, if one of the converters shuts down during operation, the other converters may also shut down due to their outputs hitting current limit. In such a situation, unless a coordinated restart is ensured, the system may never properly restart since different converters will try to restart at different times causing an overload condition and subsequent shutdown. This situation can be avoided by having an external output voltage monitor circuit that detects a shutdown condition and forces all converters to shut down and restart together.
Tunable LoopTM
The SLIN-30E1AL modules have a new feature that optimizes transient response of the module called Tunable TM Loop . External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network TM connected to the output of the module. The Tunable Loop is implemented by connecting a series R-C between the SENSE and TRIM pins of the module. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
17
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Tunable LoopTM (continued)
VOUT SENSE
RTUNE
MODULE
CTUNE
CO
TRIM GND
RTrim
Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting R TUNE and CTUNE according to Table 2 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 15A to 30A step change (50% of full load), with an input voltage of 12V.
Table 2.General recommended values of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations. Co RTUNE CTUNE 1x47F 560 270pF 2x47F 390 470pF 4x47F 390 820pF 10x47F 20x47F 220 220 2200pF 4700pF
Table 3.Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 15A step load with Vin=12V. Vo Co RTUNE CTUNE V 3.3V 2x47F + 3x330F Polymer 390 2200pF 66mV 2.5V 3x47F + 3x330F Polymer 390 3900pF 50mV 1.8V 3x47F + 4x330F Polymer 330 6800pF 36mV 1.2V 7x330F Polymer 220 10nF 24mV 0.8V 2x47F+ 10x330F Polymer 150 56nF 16mV
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
18
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Thermal Considerations
Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown below.
Wind Tunnel PWBs Power Module 25.4_ (1.0)
76.2_ (3.0)
x
12.7_ (0.50)
Probe Location for measuring airflow and ambient temperature
Air flow
Thermal Test Setup The thermal reference points, Tref used in the specifications is shown below. For reliable operation the o temperatures at this point should not exceed 125 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max).
Q6 & L2 Tref
AIRFLOW DIRECTION
Preferred airflow direction and location of hot-spot of the module (Tref).
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
19
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Example Application Circuit
Requirements: Vin: Vout: Iout: Vout: Vin, ripple 12V 1.8V 22.5A max., worst case load transient is from 15A to 22.5A 1.5% of Vout (27mV) for worst case load transient 1.5% of Vin (50mV, p-p)
CI1 CI2 CO1 CO2 CTune RTune RTrim
2x22F/16V ceramic capacitor (e.g. TDK C Series) 100F/16V bulk electrolytic 3x47F/6.3V ceramic capacitor (e.g. TDK C Series, Murata GRM32ER60J476ME20) 330F/4V Polymer/Poscap, Low EST (e.g. Sanyo Poscap 4TPE470MCL) 15nF ceramic capacitor (can be 1206, 0805 or 0603 size) 430 ohms SMT resistor (can be 1206, 0805 or 0603 size) 8k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
20
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mechanical Outline
Pin No. 1 2 3 4 5 6 7 8 9 10
Function On/Off VIN SEQ GND VOUT TRIM SENSE GND SHARE GND
BOTTOM VIEW
SIDE VIEW
TOP VIEW
Co-planarity (max) : 0.102[0.004]
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
21
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mechanical Outline (continued)
Recommended Pad Layout
Pin 8 Pin 10
Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
22
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Packaging Details
The SLIN-30E1AL modules are supplied in tape & reel as standard. All Dimensions are in millimeters and (in inches).
Reel Dimensions: Outside Dimensions: Inside Dimensions: Tape Width:
330.2 mm (13.00'') 177.8 mm (7.00") 44.00 mm (1.73")
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
23
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Surface Mount Information
Pick and Place
The SLIN-30E1AL modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as part number and serial number.
Pick and Place Location.
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size, tip style, vacuum pressure and pick & placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 5 mm max.
Tin Lead Soldering
The SLIN-30E1AL power modules are lead free modules and can be soldered either in a lead-free solder process or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order to customize the solder reflow profile for each application board assembly. The following instructions must be observed when soldering these units. Failure to observe these instructions may result in the failure of or cause damage to the modules, and can adversely affect long-term reliability. In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than 235 oC. o Typically, the eutectic solder melts at 183 C, wets the land, and subsequently wicks the device connection. Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are several types of SMT reflow technologies currently used in the industry. These surface mount power modules can be reliably soldered using natural forced convection, IR (radiant infrared), or a combination of convection/IR. For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures.
Lead Free Soldering
The SLIN-30E1AL modules are lead-free (Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free and a SnPb soldering process. Failure to observe the instructions may result in the failure of or cause damage to the modules and can adversely affect long-term reliability.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
24
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown below.
300
240
P eak Temp 235 oC
250
235
MAX TEMP SOLDER (C)
REFLOW TEMP (C)
200
Heat zo ne max 4oCs -1
Co o ling zo ne 1 oCs -1 -4
230 225 220 215 210 205 200
150
100
So ak zo ne 30-240s P reheat zo ne max 4oCs -1
Tlim above 205oC
50
0
0
10
20
30
40
50
60
REFLOW TIME (S)
Reflow Profile for Tin/Lead (Sn/Pb) process
Time Limit Curve Above 205 C Reflow for Tin Lead (Sn/Pb) process
o
MSL Rating
The SLIN-30E1AL modules have a MSL rating of 2.
Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of <= 30C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40 C, < 90% relative humidity.
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
25
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 3.63 Vdc /30 A Outputs Jul. 26, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Revision History
Date 2010-1-11 2010-6-8 2010-7-26 Revision A B C First release Update the Vout range from 2.75 Vdc to 3.63 Vdc Corrected required fuse type on page 2. Changes Detail Approval T. Bubriski T. Bubriski T. Bubriski
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products.
2010 Bel Fuse Inc. Specifications subject to change without notice. 072310
26
CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com EUROPE Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com

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