MAX20097EVKIT#

Click here for production status of specifi c part numbers. Evaluates: MAX20097 MAX20097 Evaluation Kit General Description Quick Start The MAX20097 evaluation kit (EV kit) provides a proven Required Equipment design to evaluate the MAX20097 dual-synchronous buck MAX20097 EV kit controller for high-power, high-brightness (HB) LED driv- 5V to 65V, 5A DC power supply ers. The EV kit is set up as a dual-buck LED driver and operates from a DC supply voltage from 4.5V to 65V. The Four digital voltmeters EV kit is configured to deliver up to 2A of current through Two series-connected LED strings rated to no less the LEDS for both the channels. The total voltage of each than 3A of the 2 LED strings can vary from 3V to 55V. Two current probes to measure the HB LED current Features Small flat-blade screwdriver to turn the potentiometer Input Voltage: 4.5V to 65V Oscilloscope Drives 1 to 16 LEDs on Both Channels Procedure LED Current: 0A to 2A on Both Channels The MAX20097 EV kit is fully assembled and tested. Demonstrates UVLO, Output Short Protection, Follow the steps below to verify board operation. Overload Caution: Do not turn on power supply until all con- Demonstrates Current-Limit and Thermal-Shutdown nections are complete. Feature 1) Verify that all jumper positions are as shown in Proven PCB Layout and Thermal Design Table 1. 2) Connect one of the LED string anode to the LED1+ Fully Assembled and Tested PCB pad and the cathode to GND1. Connect the second LED string anode to LED2+ PCB pad and cathode to GND2 PCB pad. 3) Connect a voltmeter across the LED1+ and GND1 PCB pads and another voltmeter between LED2+ and GND2 PCB pads. Ordering Information appears at end of data sheet. 4) Connect a voltmeter across the REFI1, REF2, and AGND test points. 5) Connect the power supply terminals to the IN and the GND3 PCB pads. 6) Clip a current probe across the wire connecting to the LEDs in both of the LED strings. 7) Turn on the power supply and set to a voltage greater than the maximum LED string voltage, but less than the 65V maximum input voltage. 8) Use a screwdriver to turn the potentiometer R23 until voltmeter reads 1.2V. Do the same with potentiometer R5. 9) Measure the LED current using the current probe in both the LED strings and verify the current is 2A. 10) Use a voltmeter to verify the expected LED string voltage for both channels. 319-100254 Rev 0 9/18Evaluates: MAX20097 MAX20097 Evaluation Kit Table 1. MAX20097 EV Kit Jumper Descriptions SHUNT JUMPER DESCRIPTION POSITION Closed Use the resistive divider to set the LED current on LED2+ string (Default) J1 Open Use the external power supply on REFI2 to set the LED2+ current. Closed Single power supply input for both the buck controllers (Default) J2 Open Powers up the LED2+ controller separately through IN2 and GND4 PCB pads. Open External PWM pulse generator to be applied on DIM2 test point. 1-2 J3 DIM2 pulled up to V for 100% PWM dimming. CC (Default) 2-3 DIM2 input is GND and LED2+ string is disabled. 1-2 (Default) IN power supply connected to the IN pin of the device. J4 IN pin of the device shorted to V and external voltage between 4.5V to 5.5V can be forced on CC 2-3 VCC test point. Open External PWM pulse generator to be applied on DIM1 test point 1-2 J5 DIM1 pulled up to V for 100% PWM dimming. CC (Default) 2-3 DIM1 input is GND and LED1+ string is disabled. Closed Use the resistive divider to set the LED current on LED1+ string. (Default) J6 Open Use the external power supply on REFI1 to set the LED current. Closed J7 V and V shorted CC IO (Default) Closed J15 Pull FLTB to V through 10k resistor CC (Default) Maxim Integrated 2 www.maximintegrated.com