LTC3725 Single-Switch Forward Controller and Gate Driver

The LTC®3725 is a controller for a single-switch forward converter and includes an on-chip gate driver.

For secondary-side control, combine the LTC3725 with the LTC3706 PolyPhase® secondary-side synchronous forward controller to create a complete forward converter using a minimum of discrete parts. A proprietary scheme is used to multiplex gate drive signals across the isolation barrier through a tiny pulse transformer. The on-chip rectifier and the same pulse transformer provide gate drive bias power.

Alternatively, the LTC3725 can be used as a standalone voltage mode controller in a primary-side control architecture with optoisolator feedback. Voltage feedforward provides excellent line regulation and transient response

产品特点 Features

High Speed Gate Driver for Forward Converter
On-Chip Rectifier and Self-Starting Architecture Eliminates Need for Separate Gate Drive Bias Supply
Wide Input Voltage Supply Range: 9V and Up
linear Regulator Controller for Fast Start-Up
Precision UVLO with Adjustable Hysteresis
Overcurrent Protection
Volt-Second Limit Prevents Transformer Core Saturation
Voltage Feedforward for Fast Transient Response
Available in 10-Lead MSOP Package

参数

应用

Isolated 48V Telecommunication Systems
Internet Servers and Routers
Distributed Power Step-Down Converters
Automotive and Heavy Equipment

典型应用图

LTC3725 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC3725EMSE	MSOP	10	E	$3.66	$2.56
LTC3725EMSE#PBF	MSOP	10	E	$3.66	$2.56
LTC3725EMSE#TR	MSOP	10	E		$2.62
LTC3725EMSE#TRPBF	MSOP	10	E		$2.62
LTC3725IMSE	MSOP	10	I	$4.04	$2.83
LTC3725IMSE#PBF	MSOP	10	I	$4.04	$2.83
LTC3725IMSE#TR	MSOP	10	I		$2.89
LTC3725IMSE#TRPBF	MSOP	10	I		$2.89

LTC3725 数据手册及相关资料下载

数据手册(英文) : LTC3725 - Single-Switch Forward Controller and Gate Driver.PDF
可靠性数据 : R419 Reliability Data .PDF