DESCRIPTION
DC supplies up to 120V with continuous current rating up to 5A can be easily turned on and off with slew rate programmability. Multiple LX7712 devices can be paralleled to increase the current rating. The current limit, on/off slew rate, and fault response fault timers are programmed with passive external components. The latchable current limiter is configurable to either latch off (LCL) under fault conditions, or to attempt to restart in hiccup mode (RLCL). A fault time integrating function accumulates the thermal effects of short fault pulses. The fault timer is configurable for either a fixed duration or a duration that is a function of the voltage drop from line input to load output across the switch. A resistor programmable fault timer discharge function ensures that the LX7712 has dissipated excess energy to a safe level before restarting. In fold-back current limit (FCL) mode, the profile of the fold-back load current versus load voltage curve is resistor programmable.
Microchip Technology
