Evaluates: MAX17609 4.5V to 60V, MAX17609 Evaluation Kit 1A, OV, UV Protector with Forward Current Limit General Description Quick Start The MAX17609 evaluation kit (EV kit) is a fully assembled Recommended Equipment and tested circuit board that demonstrates the MAX17609 MAX17609 EV kit 4.5V to 60V, 1A, OV, UV protector with forward current- 60V DC power supply limit in a 12-pin TDFN-EP package. The EV kit can be configured to demonstrate adjustable overvoltage, under - Multimeters voltage, different current-limit types, and different current- Adjustable load (0A-1.5A) limit thresholds. USB-A male to USB-B male cable or 5V DC power supply Features 4.5V to 60V Operating-Voltage Range Equipment Setup and Test Procedure Features a TVS Diode across the Input and Schottky The EV kit is fully assembled and tested. Follow the steps Diode across the Output Terminals below to verify board operation. Evaluates UVLO, OVLO, Three Current-Limit Types, Caution: Do not turn on the power supply until all and Current-Limit Threshold connections are completed. UVLO programmed to 4.5V 1) Verify that all jumpers are in their default positions. OVLO programmed to 36V 2) Connect the USB cable to J1 from a computer or con- nect a 5V-DC power supply to TP3. Jumper-Configurable Current-Limit (Selected as 0.1A by default) 3) Verify that LED1 is on. Current-Limit Mode Set To Autoretry by default 4) Set the 60V DC power supply to 5V and connect to IN (J2/TP6). Verify that OUT (J3/TP8) is 5V. Proven PCB Layout 5) Gradually increase the DC power-supply voltage and Fully Assembled and Tested verify that OUT voltage goes down and UVOV goes low when input reaches approximately 36V. Ordering Information appears at end of data sheet. 6) Gradually decrease the DC power-supply voltage and verify that OUT comes back and UVOV goes high when the input reaches approximately 34.8V. 7) Set the DC power-supply voltage to 24V and connect the adjustable load between OUT and GND terminals and a multimeter in series to measure the current. Gradually increase the load current and verify that the OUT goes down and FLAG goes low when the load current increases above 0.1A. 8) The jumper JU1 can be configured to change the cur - rent limit as given in Table 2. Verify various current limit operations by repeating step 7. CAUTION: When applying a negative input to V , the IN negative input test should be performed when the output capacitors are fully discharged and V is not supplied. BUS 319-100157 Rev 0 3/18Evaluates: MAX17609 4.5V to 60V, MAX17609 Evaluation Kit 1A, OV, UV Protector with Forward Current Limit The UVLO threshold for input voltage is set through the Detailed Description R9, R10 resistive divider. Use the following equation to The EV kit circuit can be configured to evaluate user- calculate the value of R10 for a required undervoltage defined UVLO and OVLO thresholds using resistor-divid - threshold level: ers. The overcurrent threshold is determined by external resistors connected to the SETI pin and is jumper-config - R9 urable through jumper JU1. Using jumper JU4, the EV kit R10 = V circuit can be configured to evaluate different current limit UVLO 1 types (Autoretry, Continuous, and Latch-off). LED1 on the V REF EV kit indicates availability of logic power for annunciation signals (UVOV and FLAG) and EN. where R9 can be chosen as 2.2M, V is 1.5V, and REF The EV kit provides on-board output capacitors to enable V is the required undervoltage protection threshold. UVLO a demonstration of the MAX17609 protection features. The OVLO threshold for input voltage is set through the R11, R12 resistive divider. Use the following equation Input-Power Supply to calculate the value of R12 for a required overvoltage The EV kit is powered by a user-supplied 4.5V to threshold level: 60V power supply connected between J2/TP6 (INPUT POWER) and GND. R11 R12 = Enable V OVLO 1 To enable the device, connect a USB-A male connector V REF from the computer to the USB-B female connector, J1, or an external 5V supply to TP3 and GND. This provides 5V where R11 can be chosen as 2.2M, V is 1.5V, and REF to V and to the EN pin (JU5 connects V to EN BUS BUS V is the required overvoltage protection threshold. OVLO by default). Choose the JU5 setting to enable or disable Current-Limit Threshold operation of the MAX17609 (see Table 1). The EV kit features a jumper (JU1) to select the current- UVLO/OVLO Threshold limit threshold. Install a jumper as shown in Table 2 to Ensure jumper JU2 is installed to use the UVLO/OVLO change the current-limit threshold. resistive dividers. Table 1. Enable (JU5) JUMPER SHUNT POSITION DESCRIPTION MAX17609 STATUS 1-2* EN pin connected to V ON BUS JU5 2-3 EN pin connected to GND OFF Open EN pin floating ON *Default position. Table 2. Current-Limit Threshold (JU1) JUMPER SHUNT POSITION DESCRIPTION 1-2* Current limit 0.1A 3-4 Current limit 0.5A JU1 5-6 Current limit 1.0A 7-8 Current limit adjustable *Default position. Maxim Integrated 2 www.maximintegrated.com