View MAX5927EVKIT_377527.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-3411; Rev 0; 9/04
MAX5927 Evaluation Kit
General Description
The MAX5927 evaluation kit (EV kit) is a fully assembled and tested surface-mount quad hot-swap controller/ power-sequencer/voltage-tracker circuit board, which provides current limiting and VariableSpeed/ BiLevelTM fault protection on all four channels. The circuit uses the MAX5927 in a 32-pin thin QFN package and is configurable for a 1.0V to 13.2V input range. The MAX5927 features a configurable latch/autoretry fault mode, circuit-breaker function, and programmable undervoltage lockout (UVLO). The EV kit is configured to demonstrate four separate input voltages: 5V, 3.3V, 2.5V, and 1.8V. The 5V input is configured for 0.5A of output current, while the 3.3V input is configured for 1.5A of output current. The 2.5V and 1.8V inputs are each configured for 5A of output current. The MAX5927 controls four n-channel power MOSFETs and provides current regulation during startup for all four inputs. Several configurations allow the MAX5927's unique current regulation architecture to be tailored to the application. The current limiting and short-circuit protection features are configurable and demonstrate the various features of the MAX5927. The EV kit has several configurations for the startup timer setting, current limit, and voltage-tracking/powersequencing/independent modes of operation. The EV kit also provides independent turn-on delays for the four outputs, independent on/off control, and independent status reports of all four channels. The MAX5927 EV kit can also be reconfigured to emulate a MAX5929 (quad hot swap), MAX5930 (triple hot swap), or MAX5931 (triple hot swap) design.
Features
Input Voltages 5V, VIN1 (as Configured) 3.3V, VIN2 (as Configured) 2.5V, VIN3 (as Configured) 1.8V, VIN4 (as Configured) Configurable Voltage-Tracking/PowerSequencing/Independent Operation Modes Independent On/Off Control and Status Reports for Each Channel Outputs VOUT1: 5V, 0.5A (Configurable for Up to 1A) VOUT2: 3.3V, 1.5A (Configurable for Up to 3A) VOUT3: 2.5V, 5A (Configurable for Up to 10A) VOUT4: 1.8V, 5A (Configurable for Up to 10A) Configurable 25mV Current-Trip Threshold Demonstrates Unique Current-Regulation Architecture and Circuit-Breaker Function Configurable Startup Timer Configurable Input Undervoltage Monitoring (All Inputs) Emulates MAX5929, MAX5930, or MAX5931 IC Functions Surface-Mount Components Fully Assembled and Tested
Evaluates: MAX5927
Ordering Information
PART MAX5927EVKIT TEMP RANGE 0C to +70C IC-PACKAGE 32 Thin QFN
Component Suppliers
SUPPLIER Central Semiconductor Fairchild IRC Murata Sanyo USA Taiyo Yuden Toshiba Vishay PHONE 631-435-1110 888-522-5372 361-992-7900 770-436-1300 619-661-6322 800-348-2496 949-455-2000 N/A FAX 631-435-1824 N/A 361-992-3377 770-436-3030 619-661-1055 847-925-0899 949-859-3963 N/A WEBSITE www.centralsemi.com www.fairchildsemi.com www.irctt.com www.murata.com www.sanyovideo.com www.t-yuden.com www.toshiba.com/taec www.vishay.com
Note: Indicate that you are using the MAX5927 when contacting these component suppliers.
VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX5927 Evaluation Kit Evaluates: MAX5927
Component List
DESIGNATION QTY C1 1 DESCRIPTION 100F, 16V OS-CON capacitor (E case) Sanyo 16SA100M 150F, 16V OS-CON capacitor (F case) Sanyo 16SA150M 1000F, 16V OS-CON capacitors (H case) Sanyo 16SA1000M 0.1F 10%, 25V X7R ceramic capacitors (0805) Murata GRM21BR71E104K 0.22F 10%, 16V X7R ceramic capacitor (0805) Murata GRM21BR71C224K 0.15F 10%, 25V X7R ceramic capacitor (0805) Murata GRM21BR71E154K 0.068F 10%, 25V X7R ceramic capacitor (0805) Murata GRM219R71E683K 1000pF 10%, 50V X7R ceramic capacitor (0603) Taiyo Yuden UMK107B102KZ 1F 10%, 16V X7R ceramic capacitors (0805) Murata GRM21BR71C105K Not installed, OS-CON capacitor (E case) Not installed, OS-CON capacitor (F case) Not installed, OS-CON capacitors (H case) 1A 20V Schottky diode (SMA) Central Semiconductor CMSH1-20M DESIGNATION QTY D2, D3, D4 3 DESCRIPTION 3A 30V Schottky diodes (M-Flat) Toshiba CMS02 7.5V 500mW zener diode (SOD-123) Central Semiconductor CMHZ5236B 7-pin headers 2-pin headers 3-pin headers 20V, 3A n-channel MOSFET (SuperSOT-3) Fairchild FDN339AN 30V, 13A n-channel MOSFET (SO-8) Fairchild FDS6670A 30V, 100A n-channel MOSFETs (D2PAK) Fairchild FDB7045L 0.042 1%, 0.5W sense resistor (1206) IRC LRC1206-R042-F or Vishay WSL1206R0420FSA 0.013 1%, 0.5W sense resistor (1206) IRC LRF1206-R013-F 0.0042 1%, 1.5W sense resistors (2512) Vishay WSL25124L200FBA or IRC LRF2512-R004-F 100k 1% resistors (0805) 4.02k 1% resistor (0805) 49.9k 1% resistor (0805) 3.32k 1% resistors (0805) 1.87k 1% resistor (0805) 412k 1% resistor (0805) 1k 5% resistors (0805)
D5 J1, J2 JU1-JU4, JU6, JU7, JU9-JU12 JU5, JU8 N1
1 2 10 2 1
C2
1
C3, C4
2
C5-C8, C12
5
C9
1
N2
1
N3, N4
2
C10
1
C11
1
R1
1
C13
1
R2
1
C14-C17
4
R3, R4
2
C18 C19 C20, C21
0 0 0
R5-R8, R16, R19, R22, R25 R9 R10 R11, R13, R14 R12 R15 R17, R20, R23, R26
8 1 1 3 1 1 4
D1
1
2
_______________________________________________________________________________________
MAX5927 Evaluation Kit
Component List (continued)
DESIGNATION QTY R18 R21 R24 R27 R28, R29 R30, R31 R32-R35 SW1-SW4 VIN1-VIN4, VOUT1-VOUT4, PGND, PGND, PGND, PGND U1 None None 1 1 1 0 2 2 4 4 DESCRIPTION 237k 1% resistor (0805) 158k 1% resistor (0805) 84.5k 1% resistor (0805) Not installed, resistor (0805) 10k 5% resistors (0805) 1k 5% resistors (0805) 5.1k 5% resistors (0805) SPST momentary contact switches
4) Verify that shunts are not installed on jumpers JU7 (POL, normal logic polarity) and JU8 (MODE, power-sequencing mode). 5) Verify that a shunt is installed on jumpers JU9 (ON1, C9 delay capacitor), JU10 (ON2, C10 delay capacitor), JU11 (ON3, C11 delay capacitor), and JU12 (ON4, C12 delay capacitor). 6) Connect the 5V power supply to the VIN1 banana jack and the supply ground to the PGND banana jack. 7) Utilizing very short 10A-rated banana leads (<6in long), connect the 5V, 3.3V, 2.5V, and 1.8V DC power supplies to the VIN1, VIN2, VIN3, and VIN4 metal banana jacks, respectively. Utilizing very short 10A-rated banana leads (<6in long), connect the supply grounds to the respective PGND metal banana jacks. 8) Connect the voltmeter to the VOUT1 and PGND pads. 9) Turn on all four power supplies and verify the following output voltages: VOUT1 = 5V VOUT2 = 3.3V VOUT3 = 2.5V VOUT4 = 1.8V 10) Pressing pushbutton switches SW1-SW4 resets their respective outputs (VOUT1-VOUT4). 11) Test points TP1-TP4 and GND pads nearby are provided to observe their respective MOSFET gate voltages with an oscilloscope. Note: The banana leads connecting the power supplies and their respective load to the EV kit must be very short (<6in long) and rated for at least 10A of current.
Evaluates: MAX5927
12
Uninsulated banana jacks
1 12 4
MAX5927ETJ (32-pin thin QFN, 5mm x 5mm) Shunts (JU1-JU12) Rubber bumpers
Quick Start
The MAX5927 EV kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supplies until all connections are completed.
Required Equipment
* One 5V, 1A-capable power supply (2A for maximum current-limit configuration) * One 3.3V, 3A-capable power supply (6A for maximum current-limit configuration) * One 2.5V, 10A-capable power supply (20A for maximum current-limit configuration) * One 1.8V, 10A-capable power supply (20A for maximum current-limit configuration) * One voltmeter for confirming output voltages
Detailed Description
The MAX5927 EV kit is a quad hot-swap controller circuit board configured to four different input voltages: 5V input (VIN1), 3.3V input (VIN2), 2.5V input (VIN3), and 1.8V input (VIN4). All four inputs have separate and independent current limiting, VariableSpeed/BiLevel fault protection, and circuit-breaker functions. The EV kit uses a MAX5927ETJ IC in a 32-pin thin QFN package to control the four channels of the circuit. The EV kit can be reconfigured for any input voltage between 1.0V and 13.2V, given that at least one input voltage is 2.7V. The EV kit features several modes of operation that are jumper configurable (JU8): voltage-tracking mode, power-sequencing mode, and independent mode. In the voltage-tracking mode, the MAX5927 turns all channels on and off together. When the EV kit is configured for the power-sequencing mode, the MAX5927
3
MAX5927 Configuration (All Outputs)
1) Verify that shunts are installed on jumpers JU1 (ILIM1, 0.5A), JU2 (ILIM2, 1.5A), JU3 (ILIM3, 5A), and JU4 (ILIM4, 5A). 2) Verify that a shunt is installed on pins 1 and 2 of jumper JU5 (RTIM, 411s). 3) Verify that a shunt is installed on jumper JU6 (LATCH, autoretry mode).
_______________________________________________________________________________________
MAX5927 Evaluation Kit
turns each channel on and off depending on the corresponding ON pin command voltage. In this mode, all channels are turned off if a fault occurs on any channel. Lastly, the independent mode provides separate control of each channel. When a fault occurs in this mode of operation, the MAX5927 only shuts down the affected channel. Pushbutton switches SW1-SW4 are provided for resetting the outputs VOUT1-VOUT4, respectively. The EV kit has configurable startup timer settings. Jumper-configurable (JU9-JU12) independent power turn-on delay capacitors at each ON pin input (C9-C12) provide several choices for evaluating different hot-swap methods. The MAX5927's ON pin signals and open-drain STAT pin signals are provided at headers J1 and J2 for all channels on the EV kit. The 0.100in center headers can be connected with a ribbon cable to facilitate evaluation. The STAT pin's logic polarity can be reversed using JU7 to configure the MAX5927 POL pin. The EV kit also features a configurable latch/autoretry fault mode. JU6 configures the EV kit for the desired fault mode. In the latched mode, the outputs are latched off until all the power supplies have been cycled off and then on. Additionally, the pushbutton switch for the respective channel that caused the fault can be pushed to unlatch the outputs. In the autoretry mode, the MAX5927 attempts to turn the outputs back on after a delay period. The MAX5927 controls each channel's power n-channel MOSFET (N1-N4) and provides current regulation during startup for all four channels' outputs. The current-limit threshold level can be reconfigured separately for each channel's output. The 5V output (VOUT1) current limit can be configured for 1A by using JU1. PC board pads are provided for external capacitor C5 to increase MOSFET N1's gate turn-on time. Test point TP1 can be used with an oscilloscope to view N1's gate voltage. PC board pads are also provided for an optional user-installed surfacemount zener diode (SOD-123 case, D5) to clamp N1's gate-source voltage.
Evaluates: MAX5927
The 3.3V output (VOUT2) current limit can be configured for 3A by using JU2. PC board pads are provided for external capacitor C6 to increase MOSFET N2's gate turn-on time. Test point TP2 can be used with an oscilloscope to view N2's gate voltage. The 2.5V output (VOUT3) current limit can be configured for 10A by using JU3. PC board pads are provided for external capacitor C7 to increase MOSFET N3's gate turn-on time. Test point TP3 can be used with an oscilloscope to view N3's gate voltage. The 1.8V output (VOUT4) current limit can be configured for 10A by using JU4. PC board pads are provided for external capacitor C8 to increase MOSFET N4's gate turn-on time. Additionally, pads are also provided for an optional user-installed surface-mount resistor (0805 case, R33) to help control gate oscillations on N4 or to disable it. Test point TP4 can be used with an oscilloscope to view N4's gate voltage. Additionally, the MAX5927 EV kit can be used to evaluate outputs up to 20A. When configuring for higher current levels, install optional capacitors C18-C21. These capacitors are provided with the EV kit. Several resistors and MOSFETs must be appropriately chosen for the higher current levels. See the Evaluating Other Input Voltages (1V to 13.2V) and Other Output Currents section for more details. Diodes D1-D4 on the EV kit are used to prevent an inductive kickback resulting from long lead connections in a lab environment. They are generally not needed in a real application circuit. The MAX5927 EV kit can also be used to emulate the MAX5929 quad hot-swap design or the MAX5930/ MAX5931 triple hot-swap design after reconfiguring the appropriate jumpers and/or component replacement. See the MAX5929/MAX5930/MAX5931 Emulation section for information on emulating other hot-swap designs.
4
_______________________________________________________________________________________
MAX5927 Evaluation Kit
Jumper Selection
Several jumper selections in the following tables display the functions and emulation modes provided by the MAX5927 EV kit. 5V Slow Comparator Current Limit (VOUT1) The MAX5927 EV kit features a 2-pin jumper (JU1) to change the slow comparator current-limit threshold level for the 5V output. Table 1 lists the jumper options. 3.3V Slow Comparator Current Limit (VOUT2) The MAX5927 EV kit features a 2-pin jumper (JU2) to change the slow comparator current-limit threshold level for the 3.3V output. Table 2 lists the jumper options. 2.5V Slow Comparator Current Limit (VOUT3) The MAX5927 EV kit features a 2-pin jumper (JU3) to change the slow comparator current-limit threshold level for the 2.5V output. Table 3 lists the jumper options. 1.8V Slow Comparator Current Limit (VOUT4) The MAX5927 EV kit features a 2-pin jumper (JU4) to change the slow comparator current-limit threshold level for the 1.8V output. Table 4 lists the jumper options.
Evaluates: MAX5927
Table 1. Jumper JU1 Functions
SHUNT LOCATION Installed None ILIM1 PIN Connected to GND Connected to resistor R11 EV KIT MODE VOUT1 slow comparator current limit set to 25mV VOUT1 slow comparator current limit set to 50mV
Table 3. Jumper JU3 Functions
SHUNT LOCATION Installed None ILIM3 PIN Connected to GND Connected to resistor R13 EV KIT MODE VOUT3 slow comparator current limit set to 25mV VOUT3 slow comparator current limit set to 50mV
Table 2. Jumper JU2 Functions
SHUNT LOCATION Installed None ILIM2 PIN Connected to GND Connected to resistor R12 EV KIT MODE VOUT2 slow comparator current limit set to 25mV VOUT2 slow comparator current limit set to 39mV
Table 4. Jumper JU4 Functions
SHUNT LOCATION Installed None ILIM4 PIN Connected to GND Connected to resistor R14 EV KIT MODE VOUT4 slow comparator current limit set to 25mV VOUT4 slow comparator current limit set to 50mV
_______________________________________________________________________________________
5
MAX5927 Evaluation Kit Evaluates: MAX5927
Startup Timer Setting The MAX5927 EV kit features several choices for setting the time limit to completely turn on power MOSFETs N1-N4. Jumper JU5 selects the time and Table 5 lists the selectable jumper options to reconfigure the startup timer setting. Latch/Autoretry Fault Modes The MAX5927 EV kit features a jumper to configure the EV kit mode of operation after a fault has occurred, to either latched or autoretry mode. Jumper JU6 sets the latch/autoretry mode of the LATCH pin on the MAX5927. Table 6 lists the selectable jumper options. Status Output Polarity The MAX5927 EV kit features a jumper to configure the MAX5927 status pin's logic polarity. The status pin normally provides a logic high when a hot swap has been successful and a logic low for a fault condition. The status pin's logic polarity or state can be reversed with jumper JU7. JU7 sets the polarity of the status outputs on the MAX5927 EV kit. Table 7 lists the selectable jumper options. Voltage-Tracking/Power-Sequencing/ Independent Operation Modes The MAX5927 EV kit features several choices for setting the EV kit's operating mode; voltage-tracking mode, power-sequencing mode, or independent mode control of each channel. Jumper JU8 selects the operating mode and Table 8 lists the selectable jumper options to reconfigure the operating mode.
Table 5. Jumper JU5 Functions
SHUNT LOCATION 1 and 2 2 and 3 None RTIM PIN Connected to R9 Connected to R10 Floating EV KIT MODE 411s startup timer setting 5.1ms startup timer setting 9ms startup timer setting
Table 7. Jumper JU7 Functions
SHUNT LOCATION None Installed POL PIN Floating Connected to GND STAT1-STAT4 PIN MODE Normal logic polarity (asserted open drain) Reverse logic polarity (asserted low)
Table 6. Jumper JU6 Functions
SHUNT LOCATION None Installed LATCH PIN Floating Connected to GND EV KIT MODE Latched mode Autoretry mode
Table 8. Jumper JU8 Functions
SHUNT LOCATION 1 and 2 2 and 3 None MODE PIN Connected to VBIAS Connected to GND Floating EV KIT OPERATION Voltage-tracking mode Independent mode Power-sequencing mode
See the Detailed Description section for more information on the various types of operating modes.
6
_______________________________________________________________________________________
MAX5927 Evaluation Kit
ON1 Pin Delay (VIN1) The MAX5927 EV kit features a jumper to delay turning on the VOUT1 output. Given that at least one input is 2.7V for more than the UVLO-to-startup delay (37.5ms, typ), the jumper sets the response of the MAX5927 ON1 pin with respect to VIN1. Jumper JU9 selects the turn-on delay for the EV kit. Table 9 lists the selectable jumper options. ON2 Pin Delay (VIN2) The MAX5927 EV kit features a jumper to delay turning on the VOUT2 output. Given that at least one input is 2.7V for more than the UVLO-to-startup delay (37.5ms, typ), the jumper sets the response of the MAX5927 ON2 pin with respect to VIN2. Jumper JU10 selects the turn-on delay for the EV kit. Table 10 lists the selectable jumper options. ON3 Pin Delay (VIN3) The MAX5927 EV kit features a jumper to delay turning on the VOUT3 output. Given that at least one input is 2.7V for more than the UVLO-to-startup delay (37.5ms, typ), the jumper sets the response of the MAX5927 ON3 pin with respect to VIN3. Jumper JU11 selects the turn-on delay for the EV kit. Table 11 lists the selectable jumper options. ON4 Pin Delay (VIN4) The MAX5927 EV kit features a jumper to delay turning on the VOUT4 output. Given that at least one input is 2.7V for more than the UVLO-to-startup delay (37.5ms, typ), the jumper sets the response of the MAX5927 ON4 pin with respect to VIN4. Jumper JU12 selects the turn-on delay for the EV kit. Table 12 lists the selectable jumper options.
Evaluates: MAX5927
Table 9. Jumper JU9 Functions
SHUNT LOCATION None ON1 PIN, R15, R16 C9 floating Connected to C9; enable turn-on delay EV KIT MODE VOUT1 turns on with no delay VOUT1 turns on 40.1ms after releasing SW1
Table 11. Jumper JU11 Functions
SHUNT LOCATION None ON3 PIN, R21, R22 C11 floating Connected to C11; enable turn-on delay EV KIT MODE VOUT3 turns on with no delay VOUT3 turns on 10ms after releasing SW3
Installed
Installed
Table 10. Jumper JU10 Functions
SHUNT LOCATION None ON2 PIN, R18, R19 C10 floating Connected to C10; enable turn-on delay EV KIT MODE VOUT2 turns on with no delay VOUT2 turns on 20.6ms after releasing SW2
Table 12. Jumper JU12 Functions
SHUNT LOCATION None ON4 PIN, R24, R25 C12 floating Connected to C12; enable turn-on delay EV KIT MODE VOUT4 turns on with no delay VOUT4 turns on 9.7ms after releasing SW4
Installed
Installed
_______________________________________________________________________________________
7
MAX5927 Evaluation Kit Evaluates: MAX5927
J1 and J2 Header Signals The MAX5927 EV kit features two 7-pin 0.100in center headers for monitoring the STAT_ and ON_ signal of each channel. Header J1 provides the signals for channels 1 and 4, while header J2 provides the signals for channels 2 and 3. Analog grounds are provided at each header. Table 13 lists the specific header pin signals. Evaluating Other Input Voltages (1V to 13.2V) and Other Output Currents The MAX5927 EV kit can evaluate other quad hot-swap controller configuration voltages operating from 1V to 13.2V and provide up to 20A of current at the output. One of the input voltages, VIN1-VIN4, must be 2.7V. To evaluate other current limits, current-sense resistors R1-R4, current-limit resistors R11-R14, and MOSFETs N1-N4 must be appropriately chosen for the new current and/or voltage level at the modified channel. Refer to the MAX5927/MAX5929 data sheet for information on selecting components.
Control Modes and Other Input Voltages
Fault Resetting and ON Pins The MAX5927 EV kit features four pushbutton switches (SW1-SW4) to allow momentary toggling of the ON1-ON4 pins of the MAX5927. Each switch disables the respective EV kit output or unlatches faults when the EV kit is configured for latch mode (see Table 6). A voltage can also be applied to the respective ON pin of headers J1 or J2 (see Table 13) to perform other functions with the MAX5927 ON pin. Refer to the MAX5927/MAX5929 data sheet for additional functions of the ON pins when toggling or applying a voltage to the pins. MOSFET Gate Control The MAX5927 EV kit features an option to increase a channel's power MOSFET gate (N1-N4) turn-on time. PC board pads are provided for installing a 0805 surface-mount capacitor (C5-C8) at the respective gatedrive pin. Refer to the MAX5927/MAX5929 data sheet for information on selecting the value of the capacitors. Test points TP1-TP4 are provided to observe the respective gate-drive voltage with an oscilloscope. Zener diode D5 is used to clamp the gate-to-source voltage of MOSFET N1 during an output short-circuit condition.
MAX5929/MAX5930/MAX5931 Emulation
Emulating a MAX5929 Quad Hot-Swap or MAX5930/MAX5931 Triple Hot-Swap Design The MAX5927 EV kit can emulate the MAX5929, MAX5930, or MAX5931 hot-swap features. The EV kit uses the MAX5927 and properly set jumpers to emulate other designs. See Table 14 to emulate the MAX5929 design, or Table 15 to emulate the MAX5930 design, or Table 16 to emulate the MAX5931 design. The triple hot-swap emulation requires component removal and installation. Refer to the MAX5927/MAX5929 data sheet for a description of specific pin functions on the emulated Maxim part and its associated external components.
Table 13. Header J1 and J2 Pin Signals
HEADER J1 PIN 1 2 3 4 5 6 7 SIGNAL STAT1 GND ON_1 GND STAT4 GND ON_4 HEADER J2 PIN 1 2 3 4 5 6 7 SIGNAL STAT2 GND ON_2 GND STAT3 GND ON_3
8
_______________________________________________________________________________________
MAX5927 Evaluation Kit
Table 14. Emulating a MAX5929 Quad Hot-Swap Design (Set Shunt Location per Table)
JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12 SHUNT LOCATION Installed Installed Installed Installed Set per Table 5 Set per Table 6 and MAX5929 IC desired Set per Table 7 and MAX5929 IC desired Set per Table 8 Set per Table 9 Set per Table 10 Set per Table 11 Set per Table 12 MAX5929 PIN ILIM1 ILIM2 ILIM3 ILIM4 RTIM LATCH POL MODE ON1 ON2 ON3 ON4 MAX5929 EV KIT MODE EMULATED VOUT1 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5929 VOUT2 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5929 VOUT3 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5929 VOUT4 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5929 Startup timer setting delay Latched or autoretry mode Status output pins logic polarity Voltage-tracking/power-sequencing/independent operation mode VOUT1 turn-on delay setting VOUT2 turn-on delay setting VOUT3 turn-on delay setting VOUT4 turn-on delay setting
Evaluates: MAX5927
To evaluate a triple hot-swap design, channel 4 of the MAX5927 EV kit must be disabled. Perform the following modifications prior to reconfiguring the jumpers: 1) Remove surface-mount resistors R24, R25, and R26. 2) Install a 1k, 0805 surface-mount resistor at R27. 3) Confirm that header J1/pin 7 (ON_4) does not have an external voltage source applied to it.
4) Connect a jumper from the VIN3 input to the VIN4 input. 5) To evaluate a quad hot-swap design again, reverse the above steps.
_______________________________________________________________________________________
9
MAX5927 Evaluation Kit Evaluates: MAX5927
Table 15. Emulating a MAX5930 Triple Hot-Swap Design (Set Shunt Location per Table)
JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12 SHUNT LOCATION Set per Table 1 Set per Table 2 Set per Table 3 Installed Set per Table 5 Set per Table 6 Set per Table 7 Set per Table 8 Set per Table 9 Set per Table 10 Set per Table 11 None MAX5930 PIN ILIM1 ILIM2 ILIM3 ILIM4 RTIM LATCH POL MODE ON1 ON2 ON3 ON4 MAX5930 EV KIT MODE EMULATED VOUT1 slow comparator current limit VOUT2 slow comparator current limit VOUT3 slow comparator current limit MAX5930 does not have this pin Startup timer setting delay Latched or autoretry mode Status output pins logic polarity Voltage-tracking/power-sequencing/independent operation mode VOUT1 turn-on delay setting VOUT2 turn-on delay setting VOUT3 turn-on delay setting MAX5930 does not have this pin
To evaluate a triple hot-swap design, channel 4 of the MAX5927 EV kit must be disabled. Perform the following modifications prior to reconfiguring the jumpers: 1) Remove surface-mount resistors R24, R25, and R26. 2) Install a 1k, 0805 surface-mount resistor at R27.
3) Confirm that header J1/pin 7 (ON_4) does not have an external voltage source applied to it. 4) Connect a jumper from the VIN3 input to the VIN4 input. 5) To evaluate a quad hot-swap design again, reverse the above steps.
Table 16. Emulating a MAX5931 Triple Hot-Swap Design (Set Shunt Location per Table)
JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12 SHUNT LOCATION Installed Installed Installed Installed Set per Table 5 Set per Table 6 and MAX5931 IC desired Set per Table 7 and MAX5931 IC desired Set per Table 8 Set per Table 9 Set per Table 10 Set per Table 11 None MAX5931 PIN ILIM1 ILIM2 ILIM3 ILIM4 RTIM LATCH POL MODE ON1 ON2 ON3 ON4 MAX5931 EV KIT MODE EMULATED VOUT1 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5931 VOUT2 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5931 VOUT3 slow comparator current limit set to 25mV; fixed at 25mV on the MAX5931 MAX5931 does not have this pin Startup timer setting delay Latched or autoretry mode Status output pins logic polarity Voltage-tracking/power-sequencing/independent operation mode VOUT1 turn-on delay setting VOUT2 turn-on delay setting VOUT3 turn-on delay setting MAX5930 does not have this pin
10
______________________________________________________________________________________
VIN2 R18 237k 1% R21 158k 1% R23 1k ON_3 J2-7 VIN4 J2-4 SW2 JU10 C10 0.15F JU7 R27 OPEN R26 1k MODE R24 84.5k 1% R15 412k 1% VIN1 32 31 VIN2 VIN2 SW4 C15 1F IN2 SENSE2 SENSE1 GATE2 3 GATE1 ILIM3 4 ILIM4 N.C. JU3 VIN3 C16 1F VIN3 19 VIN4 21 20 C6 0.1F D5 R33 5.1k 22 R35 1 2 5.1k TP2 5 4 6 N2 3 23 7 8 VOUT2 VOUT2 24 R2 0.013 1% JU2 ON1 ON2 ON3 ON4 ILIM2 POL MODE 25 JU1 C14 VIN1 1F ILIM1 1 IN1 R16 100k 1% R11 3.32k 1% 30 29 28 27 26 R12 1.87k 1% JU12 C12 0.1F R25 100k 1% C11 0.068F R19 100k 1% SW3 JU11 ON_4 J1-7 R22 100k 1%
VIN3
ON_2 J2-3 VIN1
R20 1k
J1-4
Figure 1. MAX5927 EV Kit Schematic
2 3 TP1 1 N1 2
ON_1 J1-3
R17 1k
JU9 C9 0.22F
SW1
R1 0.042 1%
VOUT1
VOUT1
PGND
D1
R28 10k
U1
D2 R29 10k PGND
C2 150F 16V R13 3.32k 1%
VIN4
OPEN C5 C1 0.1F 100F 16V
MAX5927
5 IN4 SENSE4 GATE4 SENSE3 18 IN3 6
R14 3.32k 1% JU4 C17 1F
PGND
PGND
R4 0.0042 1%
2 TP4 1 7
VOUT4
N4 R32 5.1k C8 0.1F VBIAS 8 STAT1 STAT2 RTIM N.C. LATCH STAT3 9 10 12 JU6 J2-1 STAT2 JU5 123 J2-5 STAT3 C13 1000pF R7 100k 1% R8 100k 1% J1-5 STAT4 11 13 VBIAS R6 100k 1% STAT4 14 VBIAS VBIAS 15 STAT1 J1-1
R3 0.0042 1% 2 TP3 GATE3 17 1 R34 5.1k C7 0.1F GND 16 J2-2 J2-6 VIN3 VIN3 VIN3 VIN2 VIN2 VIN2 VOUT3 VOUT3 N3 3
VOUT4
3
D4
PGND
R31 1k C4 1000F 16V
PGND VIN4 VIN4 C21 OPEN VIN4 R5 100k 1%
R30 1k C3 1000F 16V
D3 PGND PGND
VIN1
VIN1
VIN1
GND
C18 OPEN
GND
R9 4.02k 1% R10 49.9k 1%
VBIAS MODE J1-6 J1-2 JU8 123
Evaluates: MAX5927
______________________________________________________________________________________
C20 OPEN C19 OPEN
MAX5927 Evaluation Kit
11
MAX5927 Evaluation Kit Evaluates: MAX5927
Figure 2. MAX5927 EV Kit Component Placement Guide--Component Side Figure 3. MAX5927 EV Kit PC Board Layout--Component Side 12 ______________________________________________________________________________________
MAX5927 Evaluation Kit Evaluates: MAX5927
Figure 4. MAX5927 EV Kit PC Board Layout--Solder Side
Figure 5. MAX5927 EV Kit PC Board Layout--PGND Layer 2
______________________________________________________________________________________
13
MAX5927 Evaluation Kit Evaluates: MAX5927
Figure 6. MAX5927 EV Kit PC Board Layout--GND Layer 3 Figure 7. MAX5927 EV Kit Component Placement Guide--Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX5927EVKIT

	To Download MAX5927EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .