SC1417B

更新时间： 2024-11-30 04:05:31

品牌	Logo	应用领域
商升特 - SEMTECH		转换器
页数	文件大小	规格书
11页	186K
描述
MicroPower, 620kHz PWM, Step-up DC/DC Converter

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SC1417B 数据手册

SC1417B

MicroPower, 620kHz PWM,

Step-up DC/DC Converter

POWER MANAGEMENT

Description

Features

The SC1417B is a fixed frequency, current mode step-up

dc-dc converter. It operates over a wide input supply range

of 1.5V to 12V, making it suitable for battery input and

TFT-LCD applications. The 620kHz constant frequency

oscillator minimizes the size of external components and

allows simple filtering for noise sensitive environments.

The integrated power NPN supports peak currents of up

to 0.9A enabling the device to support 150mA at 15V

from a 5V supply. The maximum switch duty cycle of

85% (typical) allows output to input voltage ratios as high

as 6.5 in step-up configurations, thus allowing 2V to 12V

boost operation.

Operates from 1.5V to 12V supply voltage

High efficiency >85%

150mA @ 15V from 5V input

Internal switch peak current of 0.9A

Programmable output voltage

Powers up into full load

Pulse-by-pulse current limit/thermal shutdown

620kHz fixed frequency current mode converter

Low current shutdown mode extends battery life

18V output capability

Low battery detector

MSOP-8 package. Available in Lead-free package,

fully WEEE and RoHS compliant

Pin-for-pin compatible with LT1317B

The SC1417B features a low battery detector and a

200mV reference circuit which remains active during shut

down. The part consumes less than 50µA in shutdown.

The low battery detect output goes low when the input

battery voltage has dropped below a user programmable

level. Pulse-by-pulse current limit and thermal shutdown

protect the converter during load faults.

Applications

TFT-LCD Bias supplies

Constant current LED bias supplies

Pagers

GPS receivers

Battery backup

SEPIC converters

The SC1417B is available in a MSOP-8 surface mount

package.

Typical Application Circuit

10uH

SMB5819

3.3V@250mA

1.0M

V_OUT= 1.22• (1+

)

LBI

47uF

LBO

GND

604k

COMP

SC1417B

2 Cells

(Alkaline)

LBO OUT

130k

33k

3.3nF

Revision: August 1, 2006

www.semtech.com

12 3 4 5 6 7...11

中文翻译

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与SC1417B相关器件

型号	品牌	获取价格	描述	数据表
SC1417BEVB	SEMTECH	获取价格	MicroPower, 620kHz PWM, Step-up DC/DC Converter
SC1417BIMSTR	SEMTECH	获取价格	MicroPower, 620kHz PWM, Step-up DC/DC Converter
SC1417BIMSTRT	SEMTECH	获取价格	MicroPower, 620kHz PWM, Step-up DC/DC Converter
SC1417BISTR	SEMTECH	获取价格	Switching Regulator, Current-mode, 1.2A, 720kHz Switching Freq-Max, PDSO8, SO-8
SC1418IMSTR	SEMTECH	获取价格	Switching Regulator, Current-mode, 0.24A, 780kHz Switching Freq-Max, PDSO8, MSOP-8
SC1418IMSTRT	SEMTECH	获取价格	Switching Regulator, Current-mode, 0.24A, 780kHz Switching Freq-Max, PDSO8, MSOP-8
SC141A	DIGITRON	获取价格	Triac; Max Peak Repetitive Reverse Voltage: 6; Max TMS Bridge Input Voltage: 80; Max DC Re
SC141B	MOTOROLA	获取价格	200V, 6A, TRIAC, TO-220AB
SC141B	DIGITRON	获取价格	Triac; Max Peak Repetitive Reverse Voltage: 6; Max TMS Bridge Input Voltage: 80; Max DC Re
SC141B	POWEREX	获取价格	TRIAC, 200V V(DRM), 6A I(T)RMS,

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