SNOU177 December   2020 LM74700-Q1


  1.   Trademarks
  2. 1Introduction
  3. 2Setup
    1. 2.1 I/O Connector Description
    2. 2.2 Board Setup
    3. 2.3 Schematic
  4. 3Operation
    1. 3.1 Reverse Polarity Protection
    2. 3.2 ORing Application
  5. 4EVM Board Assembly Drawings and Layout Guidelines
    1. 4.1 PCB Drawings
    2. 4.2 Bill of Materials


The LM74700-Q1 evaluation module (LM74700DDFEVM) assists designers to evaluate the operation and performance of the LM74700-Q1 ideal diode controller (8-pin DDF package). This evaluation module demonstrates how an N-channel power MOSFET can emulate a very-low forward voltage diode with low IQ and low-leakage current flowing through the IC. In this design scheme, the LM74700-Q1 is combined with a MOSFET and used in series with a battery as a replacement for a Schottky diode and PFET, in reverse-polarity protection circuitry as shown in Figure 2-1. For more information on the LM74700-Q1 functional and electrical characteristics, see LM74700-Q1 Low IQ reverse battery protection ideal diode controller.