Evaluates: MAX14721-MAX14723 MAX14721 Evaluation Kit General Description Quick Start The MAX14721 evaluation kit (EV kit) is a fully assembled Required Equipment and tested circuit board that demonstrates the MAX14721 MAX14721 EV kit overvoltage, undervoltage, and overcurrent-protection 40V DC power supply device. The EV kit features an external pMOSFET and LED input/output reading. The EV kit comes with 5V DC power supply the MAX14721ATP+ installed, but can also be used to Multimeter evaluate the pin-compatible MAX14722 and MAX14723 devices with IC replacement of U1. Request samples Procedure from Maxim when ordering the EV kit. The EV kit is fully assembled and tested. Follow the steps below to verify board operation: Features 1) Verify that all jumpers are in their default positions. 5.5V to 60V Operating Voltage Range 2) Set the 40V DC power supply to 10V and connect to External pMOSFET Installed V (TP1). IN 3) Connect the 5V DC power supply to VIO (TP21). Proven PCB Layout 4) Turn on both power supplies. Verify that LED1 is on Fully Assembled and Tested and FLAG (TP15) is 0V. 5) Increase voltage on the DC power supply to TP1 EV Kit Contents and verify that LED2 turns on when voltage reaches EV kit board containing a MAX14721 ~12.4V. Check that the voltage on V (TP5) is OUT ~12.5V and FLAG (TP15) is 5V. 6) Increase the voltage on the DC power supply to TP1 and verify that LED2 turns off when the voltage reaches ~36V. Check that the voltage on V OUT (TP5) goes down and FLAG (TP15) is 0V. 7) Decrease the voltage on the DC power supply to Ordering Information appears at end of data sheet. TP1 and verify that LED2 turns on when the voltage reaches ~33.8V. Check that the voltage on V OUT (TP5) is ~33.8V and FLAG (TP15) is 5V. 8) Decrease the voltage on the DC power supply to TP1 and verify that LED2 turns off when the voltage reaches ~12V. Check that voltage on V (TP5) OUT goes down and FLAG (TP15) is 0V. 19-7630 Rev 1 3/16Evaluates: MAX14721-MAX14723 MAX14721 Evaluation Kit Table 1. LED Indicators (LED1, LED2) Detailed Description of Hardware The EV kit is a fully assembled and tested circuit board LED DESCRIPTION demonstrating the MAX14721 overvoltage, undervoltage, LED1 LED1 is on when IN is powered and overcurrent-protection device in a 20-pin, surface- LED2 LED2 is on when OUT is powered mount TQFN-EP package. Note that when the input supply voltage is higher than 36V, Table 2. Enable Inputs Jumper Settings the current-to-input increases due to the current going to 36V TVS (D2). If a current measurement beyond 36V is (JU1, JU12) desired, remove D2 to get an accurate measurement. SHUNT JUMPER DESCRIPTION LED Indicators POSITION The EV kit features LEDs to indicate the power for input 1-2 HVEN is connected to V IN JU1 and output (see Table 1). 2-3* HVEN is connected to GND Enable Inputs (EN, HVEN) Installed EN is high JU12 Use JU1 and JU12 to enable the device (see Table 2 for Not installed* EN is low jumper settings and Table 3 for enable input switch status). *Default position. Overvoltage-Lockout Threshold (OVLO) Use JU3 and JU5 to select the internal/external OVLO Table 3. Enable Inputs Switch Status threshold. Install a shunt on either JU3 or JU5, but not EN HVEN SWITCH STATUS both at the same time (see Table 4 for jumper settings). 0 0 On Undervoltage-Lockout Threshold (UVLO) 1 0 On Use JU4 and JU6 to select the internal/external UVLO 0 1 Off threshold. Install a shunt on either JU4 or JU6, but not 1 1 On both at the same time (see Table 5 for jumper settings). Table 4. OVLO Threshold Jumper Settings (JU3, JU5) JUMPER SHUNT POSITION DESCRIPTION Installed* OVLO is connected to ground internal OVLO threshold is used (do not install JU5) JU3 Not installed OVLO is open OVLO is connected to an external voltage-divider use R2/R3 or R6 to set overvoltage Installed threshold (do not install JU3) JU5 Not installed* OVLO is open *Default position. Table 5. UVLO Threshold Jumper Settings (JU4, JU6) JUMPER SHUNT POSITION DESCRIPTION Installed* UVLO is connected to ground internal UVLO threshold is used (do not install JU6) JU4 Not installed UVLO is open UVLO is connected to an external voltage-divider use R4/R5 or R7 to set the Installed undervoltage threshold (do not install JU4) JU6 Not installed* UVLO is open *Default position. Maxim Integrated 2 www.maximintegrated.com