SI9122 - Vishay Siliconix

SI9122 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers

Si9122 is a dedicated half-bridge IC ideally suited to fixed telecom applications where efficiency is required at low output voltages (e.g. <3.3 V). Designed to operate within the fixed telecom voltage range of 33−72 V and withstand 100 V, 100 ms transients, the IC is capable of controlling and driving both the low and high-side switching devices of a half b.

Features

D 12-V to 72-V Input Voltage Range D Compatible with ETSI 300 132-2 D Integrated Half Bridge Primary Drivers (1-A Drive Capability) D Secondary Synchronous Signals With Programmable Deadtime Delay D Voltage Mode Control D Voltage Feedforward Compensation D High Voltage Pre-Regulator Operates During Start-Up D Current Sensing On Low-Side Primary Device D Frequency Foldback Eliminates Constant Current Tail D Advanced Maximum Current Control During Start-Up and Shorted Load D Low Input Voltage Detection D Programmable Soft-Start Function D Over Temperature Protection APPLICATIONS D Network Cards.