HV100DB1

HV100 Demo Board HV100DB1 3-Pin Hotswap Controller Introduction The Supertex HV100DB1 demo board contains all necessay circuitry to demonstrate the features of the HV100 hotswap controller. Intended primarily as a negative hotswap controller, the HV100 controls the negative supply path. Included on board is a 100µF capacitor (C3) to provide a capacitive load for testing. Additional capacitance may be connected to the VOUT terminals. Or the 100µF may be removed altogether The board may be modified to meet custom requirements. Instructions are provided on the next page for modifications. Specifications Input Voltage Peak Inrush Limit Max Short Circuit Current1 Circuit Breaker Response Time1 Auto Retry On Resistance Undervoltage Trip 1 10V to 72V 1.4A typ 4A typ 1ms typ 2.5s typ 210mW_ max 37V on, 34V off During inrush limiting Board Layout and Connections VPP IN +OUT VPP OUT U1 DRAIN GATE Q1 + C3 -OUT VIN VNN IN C2 C1 R2 VOUT Power Supply or Load Current Probe R1 VIN Connect the supply voltage to these terminals. Supply voltage may range from 10 volts to 72 volts. A high source impedance may cause oscillations when the input voltage is near the undervoltage trip point. A high source impedance results in a large voltage drop when loaded, causing undervoltage lockout to kick in, disconnecting the load. With the load removed, input voltage rises, causing undervoltage to release and reconnecting the load. The cycle repeats, resulting in oscillations. Source impedance ...