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SC2677BITSTRT

更新时间： 2024-09-14 04:05:27

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
19页	547K
描述
Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry

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SC2677BITSTRT 数据手册

SC2677B

Dual Synchronous Voltage Mode

Controller with Current Sharing Circuitry

POWER MANAGEMENT

Features

Description

The SC2677B is a versatile 2 phase, synchronous, voltage

mode PWM controller that can be used in two distinct ways.

First, the SC2677B is ideal for applications where point of

use output power exceeds any single input power budget.

Alternatively, the SC2677B can be configured as a dual

switcher. The SC2677B features a precise temperature

compensated voltage reference, cycle-by-cycle peak cur-

rent limit, under voltage lockout over current protection,

and internal level-shifted high-side gate drive circuitry.

300kHz to 1MHz externally programmable

frequency operation

Soft Start and Enable function

Power Good output provided

Cycle-by-cycle peak current limit

Latch Off for over current protection

Phase-shifted switchers minimize ripple

High-efficiency operation, >90%

Programmable output(s) as low as 0.5V

Industrial temperature range

TSSOP-24 package

In current sharing configuration, the SC2677B can produce

a single output voltage from two separate input voltage

sources (which can be different in voltage levels) while

maintaining current sharing between the two channels.

Current sharing is programmable to allow each input sup-

ply to be loaded differently per application requirements.

TSSOP-24 EDP package

Bias voltage as low as 4.5V

Adjustable phase shift between channels

Two Phase, Current Sharing Controller

Flexible, same or separate V_IN

Programmable current sharing

Thermal distribution via multi-phase output

In dual switcher configuration, two feedback paths are pro-

vided for independent control of the separate outputs. The

device will provide a regulated output from flexibly config-

ured inputs, such as 3.3V, 5V, 12V etc. The phasing be-

tween the two switchers is adjustable to minimize the input

and output ripple.

Applications

Graphics cards

Peripheral add-in card

Dual-phase power supply

Power supplies requiring two outputs

Typical Application Schematic

CS1-

R51

CS1+

C63

R50

Vout1

C19

C23

PWRGD

ENABLE

CS1+ CS1-

C28

R13

C26

R14

C25

R10

SC2677B

Vin

R19

C33

R21

R20

CS2+ CS2-

C36

CS2-

CS2+

R49

C62

C39

C38

R18

R48

Vout2

C43

C57

C59

Dual Independent outputs

www.semtech.com

Revision: Dec. 15, 2004

12 3 4 5 6 7...19

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与SC2677BITSTRT相关器件

型号	品牌	获取价格	描述	数据表
SC2677BTETRT	SEMTECH	获取价格	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
SC2677EVB-1	SEMTECH	获取价格	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
SC2677EVB-2	SEMTECH	获取价格	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
SC2677TSTR	SEMTECH	获取价格	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
SC2677TSTRT	SEMTECH	获取价格	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
SC-268-10	MOLEX	获取价格	Wire Terminal
SC-268-14	MOLEX	获取价格	Wire Terminal,
SC2681CS1N40	PHILIPS	获取价格	Serial I/O Controller, MOS, CDIP40
SC2681CSI24	PHILIPS	获取价格	Serial I/O Controller, MOS, CDIP24
SC2681CSI28	PHILIPS	获取价格	Serial I/O Controller, MOS, CDIP28

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