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TI's LM74502 Evaluation module, LM74502EVM, is a two-channel EVM that helps designers evaluate the operation and performance of the LM74502 in channel 1 and LM74502H in channel 2 respectively. This evaluation module demonstrates how LM74502 drives external back-to-back connected N-channel MOSFETs to realize reverse polarity protection and load disconnect feature in case of overvoltage and undervoltage events. LM74502 has a gate drive strength of 60 μA, which makes it suitable for use in applications that need inherent inrush current control. On the other hand, LM74502H has a faster gate drive of 11-mA peak, which makes it suitable for applications which need fast turn-on and turn-off of external MOSFET switch. With the enable pin low during the standby mode, both the external MOSFETs and controller is off and draws a very low 1 μA of current.
Key features of the EVM include:
Input operating range 3 V to 40 V, extendable to 65 V
24-V industrial reverse polarity protection
5-A maximum load current with option for 10-A operation
Adjustable overvoltage cutoff
Output voltage slew rate control
LED Indication for output ON and OFF detection