Datasheet > SC2677EVB-1

SC2677EVB-1

更新时间： 2024-09-13 22:16:23

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
9页	163K
描述
Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry

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SC2677EVB-1 数据手册

SC2677

Dual Synchronous Voltage Mode

Controller with Current Sharing Circuitry

POWER MANAGEMENT

Features

Description

The SC2677 is a versatile 2 phase, synchronous, volt-

age mode PWM controller that may be used in two dis-

tinct ways. First, the SC2677 is ideal for applications

where point of use output power exceeds any single in-

put power budget. Alternatively, the SC2677 can be used

as a dual switcher. The SC2677 features a temperature

compensated voltage reference, an under voltage lock-

out over current protection and internal level-shifted, high-

side drive circuitry.

300kHz to 1MHz externally programmable

frequency operation

Soft Start and Enable function

Power Good output provided

Under voltage short circuit protection

Phase-shifted switchers minimize ripple

High efficiency operation, >90%

Programmable output(s) as low as 0.5V

Industrial temperature range

TSSOP-20 package

In current sharing configuration, the SC2677 can pro-

duce a single output voltage from two separate voltage

sources (which can be different voltage levels) while

maintaining current sharing between the channels. Cur-

rent sharing is programmable to allow loading each input

supply as required by the application.

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

provided for independent control of the separate outputs.

The device will provide a regulated output from flexibly

configured inputs (3.3V, 5V, 12V), provided 5V is present

for V_CC. The phasing between the two switchers is ad-

justable to minimize the input and output ripple.

Applications

Graphics cards

Peripheral add-in card

Dual-Phase power supply

Power supplies requiring two outputs

Simplified Application Schematic

+5V

Vout1

+12V

1uF

PWRGD

ENABLE

SC2677

0R0

R11

R10

+12V

+3.3V

Vout2

C10

Revision: NOV. 15, 2004

www.semtech.com

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