DESCRIPTION

Si9122 is a dedicated half-bridge IC ideally suited to fixed telecom applications where efficiency is required at low output voltages (e.g.

FEATURES

• 12 V to 72 V input voltage range

• Integrated half-bridge primary drivers (1 A drive capability)

• Secondary synchronous signals with programmable deadtime delay

• Voltage mode control

• Voltage feedforward compensation

• High voltage pre-regulator operates during start-up

• Current sensing on low-side primary device

• Frequency foldback eliminates constant current tail

• Advanced maximum current control during start-up and shorted load

• Low input voltage detection

• Programmable soft-start function

• Over temperature protections

APPLICATIONS

• Network cards

• Power supply modules