Click here to ask about the production status of specific part numbers. Evaluates: MAX16171 MAX16171 Evaluation Kit General Description Quick Start The MAX16171 EV kit is designed to evaluate the Required Equipment MAX16171, an ideal diode controller that protects MAX16171 EV Kit systems against reverse current and reverse voltage 25V, 10A DC Power Supply faults in automotive applications. The EV kit operates with a supply voltage range of 4V to 57V over the automotive Electronic Load temperature range of -40C to +125C. A jumper (J1) Oscilloscope helps place the EV kit into low power shutdown mode. Two Digital Voltmeters (DVM1, DVM2) The EV kit PCB is available with the MAX16171ATA/VY+ installed. Procedure The MAX16171 EV kit is fully assembled and tested. Benefits and Features Follow the steps to verify operation. Caution: Do not turn 4V to 57V Operating Voltage Range on the power supply until all connections are completed. Shutdown Mode Jumper 1) Verify that the jumper (J1) is in its default position as -40C to +125C Temperature Range shown in Table 1. Lead(Pb)-Free and RoHS Compliant 2) Connect the DC power supply across IN and Proven PCB Layout PWRGND PCB pads. Fully Assembled and Tested 3) Connect the electronic load between OUT and PGND. 4) Connect the positive terminal of DVM1 to GATE and Ordering Information appears at end of data sheet. the negative terminal to IN. 5) Connect the positive terminal of DVM2 to IN and the negative terminal to OUT. 6) Connect channel 1 of the scope to IN to monitor the input voltage. 7) Connect channel 2 of the scope to OUT to monitor the output voltage. 8) Turn on the power supply and increase the input volt- age, while monitoring the input and output on the os- cilloscope. The output should follow the input when the input voltage exceeds 0.7V. 9) Increase the input voltage up to 12V. DVM1 should read about 2.5V, while DVM2 should read about 20mV with no load at the output. 10) Slowly increase the load current while monitoring DVM1 and DVM2. The voltage on DVM1 should increase as the load is increased, while DMM2 should read close to 20mV. The EV kit is ready for further evaluation. Refer to the MAX16171 data sheet for more details. 319-100614 Rev 0 10/20Evaluates: MAX16171 MAX16171 Evaluation Kit Input Transient Protection Detailed Description The MAX16171 EV kit tolerates input transients from The MAX16171 EV kit evaluates the MAX16171, an +76V down to -42V without damage to the MAX16171 and ideal diode controller and protection device that protects on-board components. To increase the positive and nega- systems against fault conditions such as reverse current, tive transient beyond the absolute maximum ratings of reverse voltage, and negative transients. The MAX16171 the MAX16171, the EV kit features optional footprints controls a single N-channel MOSFET connected between for external TVS diodes (D1 and D2) to clamp input the source and load. In shutdown mode, the MAX16171 transients exceeding the protection range turns off the MOSFET(Q1) by pulling GATE to SRC but offered by the IC. See the MAX16171 EV Kit allows power-flow to the load through the body diode of Schematic Diagrams for proper orientation and the MOSFET. Thus, the system can remain in standby connection. mode while the MAX16171 consumes 1A (typ) of cur- rent. In light load applications, the MAX16171 controls Optional Components gate voltage to maintain a 20mV regulation voltage The EV kit features optional components to facilitate the between source and drain of the MOSFET. At higher evaluation of the MAX16171 in a system. A Schottky load currents, the MAX16171s charge pump increases diode (D4) in the SOD123 package between the system the gate-to-source voltage to drive the MOSFET into and IC grounds provides an alternative protection scheme an enhanced mode of operation. When the gate-to- in case D2 is not desirable. If D4 is installed, the path source voltage reaches its maximum drive voltage due underneath its footprint must be cut to disconnect the IC to increased load current, the MOSFET should be fully ground from the system ground. In such a configuration, on and the drop across the MOSFET is determined by its the IC ground remains a diode drop above the system R and load current. DSON ground during normal operation. In reverse voltage condi- Enable Input, EN tions, D4 is reverse biased and blocks the negative input transients while D1 is forward biased keeping the voltage The MAX16171 EV kit provides a jumper (J1) to enable drop across the MAX16171 to -0.7V. or disable the MAX16171. See Table 1 for J1 jumper settings. Pulling EN to ground allows the MAX16171 to The MAX16171 also features optional input/output capac- enter the shutdown mode and reduce the device supply itors, C2 and C3. For systems that do not require a current to 1A (typ). While in shutdown, the power can still huge capacitive load, C2 provides the option to evaluate flow to the load through the body diode of the MOSFET. the MAX16171 with smaller capacitor values. Similarly, Therefore, excessive load current while the device is in bypassing the capacitor (C3) offers the ability to optimize shutdown should be avoided to minimize power loss. and modify the bypassing scheme in case having C1 alone on the board does not meet system requirements. Table 1. EN Input (J1) Note: These optional components are not necessary for the proper operation of the MAX16171 but are provided SHUNT POSITION DESCRIPTION to optimize system operation, facilitate testing, and evalu- Installed* Enabled. VEN = VIN ation of the IC. Not Installed Disabled. VEN = GND *Default Position Maxim Integrated 2 www.maximintegrated.com