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LT1950 - LT1950是Single Switch PWM Controller with Auxiliary Boost Converter

LT1950是LINEAR凌力尔特公司的一款反激式、正激式和隔离式控制器产品，LT1950是LT1950是Single Switch PWM Controller with Auxiliary Boost Converter，本站介绍了LT1950的封装应用图解、特点和优点、功能等，并给出了与LT1950相关的LINEAR元器件型号供参考。

LT1950 - LT1950是Single Switch PWM Controller with Auxiliary Boost Converter - 反激式、正激式和隔离式控制器 - 电源管理 - 凌力尔特

LT1950 - Single Switch PWM Controller with Auxiliary Boost Converter

LT1950 - Single Switch PWM Controller with Auxiliary Boost Converter - Linear Technology（凌力尔特）

功能描述

The LT1950 is a wide input range, forward, boost, flyback and SEPIC controller that drives an N-channel power MOSFET with few external components required.

A resistor programmable duty cycle clamp can be used to generate a volt-second clamp for forward converter applications. An internal boost switcher is available for creating a separate supply for the output gate driver, allowing 10V gate drive from input voltages as low as 3V. The LT1950’s operating frequency can be set with an external resistor over a 100kHz to 500kHz range and a SYNC pin allows the part to be synchronized to an external clock. Additional programmability exists for leading edge blanking and slope compensation.

A fast current sense comparator achieves 60ns current sense delay and the error amplifier is a true voltage mode error amplifier, allowing a wide range of compensation networks. An accurate shutdown pin with programmable hysteresis is available for undervoltage lockout and shutdown. The LT1950 is available in a small 16-Pin SSOP package.

特点

Wide Input Range: 3V to 25V

Programmable Volt-Second Clamp

Output Power Levels from 25W to 500W

Auxiliary Boost Converter Provides 10V Gate Drive from VIN as Low as 3V

Programmable Operating Frequency (100kHz to 500kHz) with One External Resistor

Programmable Slope Compensation

Programmable Leading Edge Blanking

±2% Internal 1.23V Reference

Accurate Shutdown Pin Threshold with Programmable Hysteresis

60ns Current Sense Delay

2.5V Auxiliary Reference Output

Synchronizable to an External Clock up to 1.5 • fOSC

Current Mode Control

Small 16-Pin SSOP Package

应用

Telecom Power Supplies

Automotive Power Supplies

Portable Electronic Equipment

Isolated and Nonisolated DC/DC Converters

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LT1950EGN	SSOP-16	E	$4.20	$2.90
LT1950EGN#PBF	SSOP-16	E	$4.20	$2.90
LT1950EGN#TR	SSOP-16	E		$2.96
LT1950EGN#TRPBF	SSOP-16	E		$2.96
LT1950IGN	SSOP-16	I	$4.73	$3.20
LT1950IGN#PBF	SSOP-16	I	$4.73	$3.20
LT1950IGN#TR	SSOP-16	I		$3.26
LT1950IGN#TRPBF	SSOP-16	I		$3.26

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