SG6108

`􀂄 PC half-bridge (or 494) power supply supervisor + PWM
`􀂄 Highly Integrated and Few external components required
`􀂄 Over voltage protection 3.3V/5V/12V (two 12V)
`􀂄 Under voltage protection 3.3V/5V/12V (two 12V)
`􀂄 Under voltage protection for 12V and/or 5V
`􀂄 Over current protection 3.3V/5V/12V (two 12V)
`􀂄 Over power protection
`􀂄 Short circuit protection
`􀂄 Power-down warning circuitry
`􀂄 Power good circuitry
`􀂄 Delay time for PSON and PG signals
`􀂄 Remote ON/OFF function
`􀂄 On-Chip oscillator and Error amplifier
`􀂄 Latching PWM for cycle-by-cycle switching
`􀂄 Soft-start
`􀂄 Maximum 48% duty cycle

Switching mode power supplies for computers such as ATX, NLX, and SFX (micro-ATX).

The SG6108 controller is designed for desktop PC switching mode power supplies. It provides everything necessary to monitor and control the output of the power supply. Remote ON/OFF control, power good circuitry, over-voltage protection, over-power protection, and over-current protection are all included. The SG6108 directly senses all the output rails for over voltage conditions without requiring external dividers. An innovative AC-signal sampling circuit provides an adequate power-down warning signal for PG. A built-in timer generates accurate timing for the control circuit.

Cycle-by-cycle PWM switching protects the power transformer from saturation and ensures a rapid response for short-circuit protection. This greatly reduces the stress on the power transistors. The SG6108 utilizes a minimum number of external components while including all the functions needed for push-pull and/or half-bridge topologies. This decreases production costs and PCB space while increasing the power supply's MTBF.