Click Click herehere for production status of specific part numbers.for production status of specific part numbers. Evaluates: MAX17612A MAX17612A Evaluation Kit 4.5V to 60V, 250mA, Current-Limiter with OV, UV, and Reverse Protection General Description Quick Start The MAX17612A evaluation kit (EV kit) is a fully assem- Recommended Equipment bled and tested circuit board that demonstrates the MAX17612A EV kit MAX17612A 4.5V to 60V, 250mA, current-limiter with OV, 60V DC power supply UV, and reverse protection in a 10-pin TDFN-EP package. The EV kit can be configured to demonstrate adjustable Multimeters overvoltage, undervoltage, different current-limit types, Adjustable load (0A1A) and different current-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 connect a 5V-DC power supply to TP3. Jumper-Configurable Current-Limit (Selected as 250mA 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 250mA. 8) The jumper JU1 can be configured to change the current 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 319-100215 Rev 1 8/18Evaluates: MAX17612A MAX17612A Evaluation Kit 4.5V to 60V, 250mA, Current-Limiter with OV, UV, and Reverse Protection UVLO/OVLO Threshold Detailed Description The UVLO threshold for input voltage is set through the The EV kit circuit can be configured to evaluate user- R9, R10 resistive divider. Use the following equation to defined UVLO and OVLO thresholds using resistor-divid - calculate the value of R10 for a required undervoltage ers. The overcurrent threshold is determined by external threshold level: resistors connected to the SETI pin and is jumper-config - urable through jumper JU1. Using jumper JU4, the EV kit R9 circuit can be configured to evaluate different current limit R10 = types (Autoretry, Continuous, and Latch-off). LED1 on the V UVLO 1 EV kit indicates availability of logic power for annunciation V REF signals (UVOV and FLAG) and EN. The EV kit provides on-board output capacitors to enable where R9 can be chosen as 2.2M, V is 1.5V, and REF a demonstration of the MAX17612A protection features. V is the required undervoltage protection threshold. UVLO The OVLO threshold for input voltage is set through the Input-Power Supply R11, R12 resistive divider. Use the following equation The EV kit is powered by a user-supplied 4.5V to to calculate the value of R12 for a required overvoltage 60V power supply connected between J2/TP6 (INPUT threshold level: POWER) and GND. Enable R11 R12 = To enable the device, connect a USB-A male connector V OVLO 1 from the computer to the USB-B female connector, J1, or V REF an external 5V supply to TP3 and GND. This provides 5V to V and to the EN pin (JU5 connects V to EN BUS BUS where R11 can be chosen as 2.2M, V is 1.5V, and REF by default). Choose the JU5 setting to enable or disable V is the required overvoltage protection threshold. OVLO operation of the MAX17612A (see Table 1). Current-Limit Threshold The EV kit features a jumper (JU1) to select the current- limit threshold. Install a jumper as shown in Table 2 to change the current-limit threshold. Table 1. Enable (JU5) JUMPER SHUNT POSITION DESCRIPTION MAX17612A 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 10mA 3-4 Current limit 100mA JU1 5-6* Current limit 250mA 7-8 Current limit adjustable *Default position. Maxim Integrated 2 www.maximintegrated.com