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SYNCHRONOUS

更新时间： 2024-02-01 05:46:17

品牌	Logo	应用领域
其他 - ETC		控制器
页数	文件大小	规格书
7页	134K
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Synchronous DC/DC Controller for Distributed Power Applications (131k)

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SYNCHRONOUS 数据手册

Synchronous DC/DC Controller for

Distributed Power Supply Applications

AN99-7

January 4, 2000

APPLICATION NOTE FOR SC1102

FEATURES

INTRODUCTION

DESCRIPTION

The SC1102 is a low-cost, full featured, syn-

chronous voltage-mode controller designed

for use in single ended power supply applica-

tions where efficiency is of primary concern.

Synchronous operation allows for the elimi-

nation of heat sinks in many applications.

The SC1102 is ideal for implementing DC/DC

converters needed to power advanced micro-

processors in low cost systems, or in dis-

tributed power applications where efficiency

is important. Internal level-shift, high-side

drive circuitry, and preset shoot-thru control,

allows the use of inexpensive N-channel

power switches.

• 1.265V Reference available

• Synchronous operation

• Over current fault monitor

• On-chip power good and OVP functions

• Small size with minimum external compo-

nents

• Soft Start

• R_DS(ON)Current sensing

BLOCK DIAGRAM

SC1102 features include temperature com-

pensated voltage reference, triangle wave os-

cillator and current sense comparator cir-

cuitry. Power good signaling, shutdown, and

over voltage protection are also provided.

The SC1102 operates at a fixed 200kHz, pro-

viding an optimum compromise between effi-

ciency, external component size, and cost.

The SC1102’s manufacturing process has

been optimized for 12V operation and is

capable of handling up to 26V at it’s BST

pin.

APPLICATIONS

• Microprocessor core supply

• Low cost synchronous applications

• Voltage Regulator Modules (VRM)

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4 5 6 7

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