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48V or 24V Input 1.0V, 1.2V, 1.5V, 1.8V, 2.0V, 2.5VDC, 60A Output 3.3V, 45A; 5.0V, 30A Output
PISCES II Series
The Pisces II Series is the industry's first 60A quarter brick in Galaxy Power's CoolConverterTM line of high-efficiency DC/DC converters.
Industry Standard Pinout and Footprint Typical Efficiency: 93% at 2.5V, 30A; 91% at 2.5V, 60A Very Low Dissipation No Heat Sink Required Low Profile, 0.38" Very Low Common-mode Noise for a Commercial DC/DC Converter Two-stage Input Filter Constant Switching Frequency Remote Sense, Wide Trim Range Single Board Design, Very Low Parts Count Optional Baseplate or Low Profile Heatsink for Improved Thermal Performance Header with M3 Metal Inserts for Mechanical Connection to PCB Two Year Warranty Patented Power Supply Control and Architecture Microprocessor Controlled Primary-side Enable, Choice of Logic
The open-frame Pisces II is available with an optional heat-spreading baseplate or low profile heatsink for use in extremely demanding applications.
Control Functions
Protection Features
Over Temperature Protection Over Voltage Protection Over Current Protection Over/Under Input Voltage Protection
Typical Characteristics
Output Setpoint Accuracy: 1% Load Regulation: 0.2% Line Regulation: 0.2% Regulation over Line, Load, and Temperature: 2% Low Output Ripple Output Trim
ISO 9001 CERTIFIED ORGANISATION
(R)
Pisces II Series, Page 1
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0-061004
General Specifications
VIN = 48VDC, TA@25C, 300 LFM Airflow, VOUT=2.5V, IOUT = Full Load unless otherwise noted. Available output power depends on ambient temperature and good thermal management. (See application graphs for limits.)
Input Characteristics
Parameter Min
(24V Input in [brackets])
Typ Max Units
Operating Input Voltage Input Current (Model Dependent) Input Capacitance Input Hysteresis, Low Line Output Characteristics Regulation Over Line, Load & Temperature Voltage Ripple Voltage Ripple, 20MHz BW Current Range Current Limit Inception Short Circuit Current, Peak (see Note below) Output Transient Response, 50% to 75% load change, 1A/sec Settling Time to 1% Turn-on Time to 98%Vnom Output Overshoot at Turn-on Trim Range Overvoltage Protection, Latching Isolation Isolation Test Voltage, Input/Output (Basic) Isolation Test Voltage, Input/Case Isolation Test Voltage, Output/Case Isolation Resistance Features Overtemperature Protection, Thermal Sensor, Latching* Switching Frequency, Fixed
36 [18]
48 [24] 4 [9] 2 [1]
75 [36] 6 [10]
VDC A F VDC
98
102 25 85
%VNOM mV RMS mV P-P A %IOUT A %VOUT S mS %VOUT %VOUT %VOUT VDC VDC VDC M
0 103
60 140 90 5 200 35 0
70 130 2250 2000 500 10
110
110 250
C kHz
Notes: During short circuit, converter will shut down and attempt to restart once per second. The average current during this condition will be very low and the device can be safely left in this condition continuously. For specific output voltage specifications, see the corresponding detailed data sheet. *PCB less than 130C
General Specifications
Operating Temperature Storage Temperature Relative Humidity Vibration Material Flammability Weight MTBF Telcordia (Bellcore) -40C to +100C -55C to +125C 10% to 95% RH, Non-condensing 2 to 9Hz, 3mm disp., 9 to 200Hz 1g UL V-0 35 grams 1.6 Million Hours
Approvals and Standards
UL and c-UL Recognized Component, TUV, UL60950, CSA 22.2 No. 950, IEC/EN 60950 EMC Characteristics: Designed to meet emission and immunity requirements per EN55022, CISPR 22, Class B, and CISPR 24.
An external fuse shall be used to comply with the requirements.
Pisces II Series, Page 2
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0-061004
Application Notes CoolConverterTM
Galaxy's proprietary CoolConverterTM provides: * Patented single-stage power conversion architecture, control, and magnetic design allow unprecedented power density and efficiency in an isolated power supply. * An advanced microcontroller reduces parts count while adding features, performance, and flexibility in the design. * Low common-mode noise as a result of lower capacitance in the transformer from balanced winding design.
Protection and Control
Valid Input Voltage Range:
The converter measures the input voltage and will not allow operation outside of the input voltage specification. As shown by the graphs, hysteresis is added to both the high and low voltage to prevent the converter from turning on and off repeatedly when the voltage is held near either voltage extreme. At low line this assures the maximum input current is not exceeded; at high line this assures the semiconductor devices in the converter are not damaged by excessive voltage stress.
Input Current
Undervoltage Lockout
Voltage Rising Voltage Falling
30
32
34
36
38
40
Input Voltage (V)
ON/OFF Logic Option:
The ON/OFF control logic can be either Negative (standard) or Positive to enable the converter. For Negative logic, bring the ON/OFF pin to less than 1.0V with respect to the -INPUT pin to enable the converter. The pull-down must be able to sink 100A. For Positive logic, bring the ON/OFF pin to greater than 4.0V with respect to the -INPUT pin and be limited to less than 10V. To request the Positive logic version, add the suffix (P) to the standard part number. The ON/OFF pin has a built-in pull up resistor of approximately 100k to +5V.
Overvoltage Lockout
Input Current
Voltage Rising Voltage Falling
75
76
77
78
79
80
Input Voltage (V)
Pisces II Series, Page 3
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0-061004
Application Notes
Output Over Voltage Protection:
The output voltage is constantly monitored by the microprocessor with a redundant secondary-side measurement circuit that both shuts down the duty cycle and triggers the microprocessor to shut down. If the output voltage exceeds the over-voltage specification, the microprocessor will latch the converter off. To turn the converter on requires either cycling the ON/OFF pin or power to the converter. This advanced feature prevents the converter from damaging the load if there is a converter failure or application error. If nonlatching is required, consult factory.
Trim:
To trim the output voltage higher, connect the required trim resistor from the Trim pin to the +Sense pin. To trim the output voltage lower, connect the required trim resistor from the Trim pin to the -Sense pin. The Trim-down equation applies to all Voltages.
Trim-up for 1.5V and above: RTRIM-UP =
{
Vo (100+%) (100+2%) - 5.11k 1.225% %
Trim-up
(for 3.3V)
}
Thermal Shutdown:
The printed circuit board temperature is measured using a semiconductor sensor. If the maximum rated temperature is exceeded, the converter is latched off. To re-enable the converter requires cycling the ON/OFF pin or power to the converter. If non-latching is required, consult factory.
Control Options:
As the behavior of the circuit is determined by firmware in the microcontroller, specific customer requirements such as * non-latching thermal protection * custom valid input voltage range * controlled delay from initiating an ON/OFF signal for power sequencing can be accomplished with no change to hardware. The standard behavior was chosen based on system design experience but we understand that customers often have their own requirements. Please consult Galaxy Power for your special needs.
Trim-up for less than 1.5V: RTRIM-UP =
{
Vo (100+%) (100+2%) - 5.11k 0.62% %
}
Trim-down for all voltages: RTRIM-DOWN =
Remote Sense:
The output voltage is regulated at the point where the sense pins connect to the power output pins. Total sense compensation should not exceed 0.4V or 10% of Vout, whichever is greater.
{
100 -2 %
}
5.11k
Trim-down
Safety:
An external input fuse must always be used to meet these safety requirements.
External Output Trimming
+ Sense
Trim
Trim-down (%)
- Sense
Pisces II Series, Page 4
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0-061004
Pisces II Operation
Efficiency
1.8V Output 94 92
Efficiency
2.5V Output 94 92
Efficiency (%)
Efficiency (%)
90 88 86 84 82 80 0 10 20 30 40 50 60
90 88 86 84 82 80 0 10 20 30 40 50 60
36V Vin 48V Vin 60V Vin
36V Vin 48V Vin 60V Vin
Output Current (A)
Output Current (A)
Power Dissipation
1.8V Output 14 16
Power Dissipation
2.5V Output
Power Dissipation (W)
12 10 8 6 4 2 0 0 10 20 30 40 50 60
Power Dissipation (W)
14 12 10 8 6 4 2 0 0 10 20 30 40 50 60
36V Vin 48V Vin 60V Vin
36V Vin 48V Vin 60V Vin
Load Current (A)
Load Current (A)
Enable-on Waveform
48V Input, 30A, 1.8V Output 2.5 2.0 1.5 1.0
Vout (V)
0.5 0 Vout 6 4 Enable 2 0
0
10
20
30
40
50
Time (mS)
Pisces II Series, Page 5
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Enable (V)
Part No. 02-007 Rev. 3.0-061004
PACKAGE DETAIL
2.28
Pin Configuration --Bottom View
Pin Function Pin Dia. (in.)
1.030 PIN 1 .815 1.45 PIN 2 .515 PIN 3 .215 0 .210 BOTTOM VIEW .210 A A A B
1.030
.815 PIN 8 .515 PIN 6 .215 PIN 4 0 MOUNTING INSERT M3 X 0.5 4 PLACES
0
2.000 PIN TO PIN
1.860
.070
1 2 3 4 5 6 7 8
Notes:
- Input On/Off + Input + Output + Sense Trim - Sense - Output
0.040 0.040 0.040 0.060 0.040 0.040 0.040 0.060
0.38 0.20 SIDE VIEW
0.010 0.008
1. Mechanical tolerances x.xxx in. = 0.005 in. x.xx in. = 0.01 in. 2. Pin material: brass with tin/lead plating over nickel 3. Workmanship: Meets or exceeds IPC-A-610B Class II 4. "A" = 0.040" dia. pins 5. "B" = 0.060" dia. pins
Pisces II Series, Page 6
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Part No. 02-007 Rev. 3.0-061004
ORDERING INFORMATION
Standard Model Number Output Voltage Max Current Typical Efficiency Half Load Full Load Standard Model Number Output Voltage Max Current Typical Efficiency Half Load Full Load
48V Input Models (Designated W) G2PW5V030* 5.0V 30A G2PW3V345* 3.3V 45A G2PW2V560* 2.5V 60A G2PW2V060* 2.0V 60A G2PW1V860* 1.8V 60A G2PW1V560* 1.5V 60A G2PW1V260* 1.2V 60A G2PW1V060* 1.0V 60A
93% 91% 93% 92% 93% 91% 92% 91% 91% 90% 90% 88% 88% 86% TBD
24V Input Models (Designated C) G2PC5V030* 5.0V 30A G2PC3V345* 3.3V 45A G2PC2V560* 2.5V 60A G2PC2V060* 2.0V 60A G2PC1V860* 1.8V 60A G2PC1V560* 1.5V 60A G2PC1V260* 1.2V 60A G2PC1V060* 1.0V 60A
* Options: P = Positive Logic Version; High = On E = 0.18" poins (0.01") M = 0.145" Pins (0.01") S = 0.12" Pins (0.01") R = Heatsink Ready T = Tuned model**
92% 90% 92% 91% 92% 90% 91% 90% 90% 89% 89% 87% 87% 85% TBD
Ordering Information Example Part No.:
G2PW1V860MRT 48V input 1.8V @ 60A output Negative Logic 0.145" pin length Heatsink-ready Plate Tuned Module**
Pisces II Heatsink Part Numbers
Part Number Height Typical Thermal Performance Natural Convection Forced Convection Power Dissipation* Thermal Resistance**
001 002 003 004 005
0.25" 0.50" 1.00" 0.13" 0.70"
5W 7W 11W TBD TBD
5.8C/W 3.2C/W 2.0C/W TBD TBD
Options Code:
(All options shown)
G2PW 3V345 P S R T 00X
Part Number (from chart above) Options: Positive Logic Version Optional Pin Lengths E = 0.18" M = 0.145" S = 0.12" Heatsink-ready Tuned Model Heatsink 001 = 0.25" 002 = 0.50" 003 = 1.00" 004 = 0.13" 005 = 0.70"
**T (Tuned Model) Option
Designed for higher di/dt and I applications, the transient response has been modified to take advantage of the capacitance on the customer's PCB. This unit requires a minimum load capacitance of 5600F with an impedance magnitude of less than 0.005 at 15kHz. It offers a minimum 3X improvement in the peak response compared to a standard unit. Consult Factory.
Galaxy Power Inc. warrants to the original purchaser that the products conform to this data sheet and are free from material and workmanship defects for a period of two (2) years from the date of manufacture, if this product is used within specified conditions. Galaxy Power Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such products or information. For additional details on this limited warranty consult the factory.
155 Flanders Road Westborough, MA 01581 508-870-9775 Fax: 508-870-9796 e-mail: galaxy@galaxypwr.com website: http://www.galaxypwr.com
(c) Copyright 2002 Galaxy Power. Specifications subject to change without notice.
Pisces II Series, Page 7
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Part No. 02-007 Rev. 3.0-061004

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