SC1628

更新时间： 2024-09-30 22:50:19

品牌	Logo	应用领域
商升特 - SEMTECH		转换器功效 DC-DC转换器
页数	文件大小	规格书
4页	124K
描述
HIGH-EFFICIENCY STEP-UP DC-DC CONVERTER

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中文翻译

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数据手册

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SC1628 数据手册

HIGH-EFFICIENCY STEP-UP

DC-DC CONVERTER

SC1628

January 30, 1998

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

DESCRIPTION

FEATURES

The SC1628 is a high performance step-up DC-DC

converter, designed to drive an external power switch

to generate programmable positive voltages. In the

particularly suitable LCD contrast bias and flash

memory programming power supply applications,

typical full load efficiencies are 85% to 95%. The 4V to

24V input operation range allows the SC1628 to be

powered directly by the battery pack in most battery-

powered applications for greater efficiency. The output

voltage can be scaled to 40V or greater by two external

resistors. A pulse-frequency modulation scheme is

employed to maintain high efficiency conversion under

wide input voltage ranges. Quiescent current is about

100µA and can be reduced down to 8µA in shutdown

mode. With a switching frequency range of 90kHz to

250kHz, small size switching components may be

used, which is ideal for battery powered portable

equipment such as notebook and palmtop computers.

•

4V to 24V input voltage operation

Adjustable output voltage

Low quiescent current at 100µA

Pulse-skipping and pulse-frequency modulation

maintain high efficiency (max. 95%)

90kHz to 250kHz oscillator frequency

Power-saving shutdown mode (8µA typical)

Push-pull driver output

•

BLOCK DIAGRAM

APPLICATIONS

•

Flash memory programming power supply

Positive LCD contrast bias for notebook and palm-

top computers

•

Step-up DC-DC converter module

Telecom power supply

ORDERING INFORMATION

DEVICE⁽¹⁾

ABSOLUTE MAXIMUM RATINGS

PACKAGE

Parameter

Symbol

V_IN

Maximum Units

SC1628CS

SO-8

Note:

Supply Voltage

SHDN Voltage

(1) Add suffix ‘TR’ for tape and reel.

V_SHDN

PIN CONFIGURATION

Operating

Temperature Range

T_A

0 to 70

°C

Storage

Temperature Range

T_STG

-65 to 125

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4

中文翻译

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