UCS2112 USB Port Power Switch
The Microchip UCS2112 is a dual port USB Power Switch that provides 3.0A continuous current per VBUS port. The UCS2112 can be used in standalone and SMBus /I²C applications offering eight current limits per port ranging from 0.53A to 3.0A. In SMBus applications the UCS2112 provides per-port current monitoring; per-port charge rationing is also provided ranging from 3.8 mAh to 246.3 Ah.
For USB Battery Charging 1.2 applications, the UCS2112 includes an independent discharge function and constant current/current limiting modes.
Features
3.0A continuous current per VBUS port with 40 mΩ on-resistance per switch
Independent port power switch enable pins
Dual fault ALERT# active drain output pins
Constant current or trip mode current limiting behaviours
Undervoltage, overvoltage lockout, back-drive and back-voltage protection
Auto-recovery fault handling with low test current
BOOST# logic output to increase DC-DC converter output under large load conditions
A_DET# open-drain outputs for device attach detection per port
Eight programmable current limits assignable to each power switch - SMBus 2.0/I2C mode
Self-contained current monitoring; no external sense resistor required
Fully programmable per-port charge rationing and behaviours
USB Power Switch ICs, Microchip
