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

SI9122属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。威世科技制造生产的SI9122DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。