SI9122 Datasheet 500-khz Half-bridge DC-dc Converter With Integrated Secondary Synchronous Rectification Drivers

Manufacturer: Vishay

Overview: Si9122 Vishay Siliconix 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification.

Datasheet Details

Part number	SI9122
Manufacturer	Vishay
File Size	218.26 KB
Description	500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers
Datasheet	SI9122_VishaySiliconix.pdf

General Description

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 bridge circuit and also controlling the switching devices on the secondary side of the bridge.

Key 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 Dete.

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