Datasheet > LM25115

LM25115

更新时间： 2024-11-15 04:44:39

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器控制器
页数	文件大小	规格书
17页	725K
描述
Secondary Side Post Regulator Controller

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LM25115 数据手册

November 2005

LM25115

Secondary Side Post Regulator Controller

General Description

Features

n Self-synchronization to main channel output

n Free-run mode for buck regulation of DC input

n Leading edge pulse width modulation

n Voltage-mode control with current injection and input line

feed-forward

The LM25115 controller contains all of the features neces-

sary to implement multiple output power converters utilizing

the Secondary Side Post Regulation (SSPR) technique. The

SSPR technique develops a highly efficient and well regu-

lated auxiliary output from the secondary side switching

waveform of an isolated power converter. Regulation of the

auxiliary output voltage is achieved by leading edge pulse

width modulation (PWM) of the main channel duty cycle.

Leading edge modulation is compatible with either current

mode or voltage mode control of the main output. The

LM25115 drives external high side and low side NMOS

power switches configured as a synchronous buck regulator.

A current sense amplifier provides overload protection and

operates over a wide common mode input range. Additional

features include a low dropout (LDO) bias regulator, error

amplifier, precision reference, adaptive dead time control of

the gate signals and thermal shutdown.

n Operates from AC or DC input up to 42V

n Wide 4.5V to 30V bias supply range

n Wide 0.75V to 13.5V output range.

n Top and bottom gate drivers sink 2.5A peak

n Adaptive gate driver dead-time control

n Wide bandwidth error amplifier (4MHz)

n Programmable soft-start

n Thermal shutdown protection

n TSSOP-16 or thermally enhanced LLP-16 packages

Typical Application Circuit

20172601

FIGURE 1. Simplified Multiple Output Power Converter Utilizing SSPR Technique

DS201726

www.national.com

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与LM25115相关器件

型号	品牌	获取价格	描述	数据表
LM25115_15	TI	获取价格	LM25115 Secondary Side Post Regulator Controller
LM25115A	NSC	获取价格	Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115A	TI	获取价格	LM25115A Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115A_15	TI	获取价格	LM25115A Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115AMT	NSC	获取价格	Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115AMT/NOPB	TI	获取价格	LM25115A Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115AMTX	NSC	获取价格	Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115AMTX/NOPB	TI	获取价格	LM25115A Secondary Side Post Regulator/DC-DC Converter with Power-Up/Power-Down Tracking
LM25115MT	NSC	获取价格	Secondary Side Post Regulator Controller
LM25115MT	TI	获取价格	2.5A SWITCHING CONTROLLER, PDSO16, TSSOP-16