Click here for production status of specific part numbers. MAX17526A Evaluation Kit Evaluates: MAX17526A 5.5V to 60V, 6A Current Limiter with OV, UV, Reverse Protection, and Power Limit General Description Quick Start The MAX17526A evaluation kit (EV kit) is a fully assem- Recommended Equipment bled and tested circuit board that demonstrates the MAX17526A EV kit MAX17526A high accuracy adjustable power limiter in a 60V DC power supply 20-pin TQFN-EP package. The EV kit can be configured to demonstrate adjustable overvoltage, undervoltage, Multimeters overcurrent, different current-limit types, and power limit Adjustable load (0A to 10A) features. 5V DC power supply Features Equipment Setup and Test Procedure 5.5V to 60V Wide Input Voltage Range The EV kit is fully assembled and tested. Follow the steps Features a TVS Diode across the Input and Schottky below to verify board operation. Caution: Do not turn on Diode across the Output Terminals the power supply until all connections are completed. External NMOSFET Installed 1) Verify that all jumpers are in their default positions. Evaluates UVLO, OVLO, Three Current-Limit Types, 2) Connect a 5V DC power supply to V (TP21). IO and Current-Limit Threshold 3) Set the 40V DC power supply to 10V and connect it Programmable Input Overvoltage Setting up to 40V between V (TP1/TP2) and GND (TP3/TP4). Verify SN that LED1 is on and FLAG (TP15) is 0V. Demonstrates Internal UVLO programmed to 12.8V 4) Increase the DC power-supply voltage and verify that Demonstrates Internal OVLO programmed to 36.2V LED2 turns on when voltage reaches approximately Active Power Limit to Protect Supply or Load 12.8V. Also check that voltage on V (TP5/TP6) is OUT Proven PCB Layout 12.8V and FLAG is 5V. Fully Assembled and Tested 5) Gradually increase the DC power-supply voltage and verify that LED2 turns off when voltage reaches approximately 36.2V. Also check that voltage on V OUT goes down and FLAG is 0V. Ordering Information appears at end of data sheet. 6) Gradually decrease the DC power-supply voltage and verify that LED2 turns on when voltage reaches approximately 34.1V. Also check that voltage on V OUT is 34.1V and FLAG is 5V. 7) Set the DC power-supply voltage to 24V and connect the adjustable load between V and GND terminals OUT and a multimeter in series to measure the current. Gradually increase the load current and verify that the V goes down and FLAG goes low when the load OUT current increases above 6A. 8) The jumpers JU7-JU10 can be configured to change the current-limit as in Table 7. Verify various current- limit operations by repeating step 7. 319-100211 Rev 0 6/18MAX17526A Evaluation Kit Evaluates: MAX17526A 5.5V to 60V, 6A Current Limiter with OV, UV, Reverse Protection, and Power Limit The external OVLO threshold for input voltage is set Detailed Description through either R2/R3 or R6 resistive divider. Use the fol- The EV kit circuit can be configured to evaluate user- lowing equation to calculate the value of R2 for a required defined UVLO and OVLO thresholds using resistor-divid- OVLO threshold level: ers. The overcurrent threshold is determined by external resistors connected to the SETI pin and is jumper-con- R2 R3 = figurable through jumpers JU7-JU10. Using jumper JU2, V OVLO the EV kit circuit can be configured to evaluate different 1 V current-limit types (Autoretry, Continuous, and Latch-off). SET OVLO The EV kit also features LEDs to indicate the presence of input and output voltages (see Table 1). where: R2 can be chosen as 2.2M Input Power Supply The EV kit is powered by a user-supplied 5.5V to 60V V = 1.22V SET OVLO power supply connected between TP1/TP2 (V ) and SN V = Required overvoltage protection threshold OVLO GND. Use jumpers JU4 and JU6 to select internal or external Enable Inputs UVLO threshold. Install a shunt on either JU4 or JU6. See Table 5 for jumper settings. Use jumpers JU1 and JU12 to enable the device (see Table 2 for jumper settings and Table 3 for enable switch The external UVLO threshold for input voltage is set status). through either R4/R5 or R7 resistive divider. Use the fol- lowing equation to calculate the value of R4 for a required UVLO/OVLO Threshold UVLO threshold level: Use jumpers JU3 and JU5 to select internal or external OVLO threshold. Install a shunt on either JU3 or JU5. See R5 R4 = Table 4 for jumper settings. V UVLO 1 V Table 1. LED Indicator (LED1, LED2) SET UVLO LED DESCRIPTION where: LED1 LED1 is on when SN is powered R5 can be chosen as 2.2M LED2 LED2 is on when OUT is powered V = 1.26V SET UVLO V = Required undervoltage protection threshold UVLO Table 2. Enable Inputs Jumper Setting (JU1, JU12) Table 3. Enable Inputs Switch Status SHUNT JUMPER DESCRIPTION HVEN EN MAX17526A STATUS POSITION 0 0 ON 1-2 HVEN pin connected to V SN JU1 0 1 ON 2-3* HVEN pin connected to GND 1 0 OFF Installed EN is high JU12 1 1 ON Not Installed* EN is low *Default Position Maxim Integrated 2 www.maximintegrated.com