SC4905AMSTR datasheet(1/20 Pages) SEMTECH

부품명	SC4905AMSTR

상세설명	HIGH PERFORMANCE VOLTAGE MODE PWM CONTROLLER

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제조업체	SEMTECH [Semtech Corporation]

홈페이지	http://www.semtech.com

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SC4905A/B

High Performance Voltage Mode

PWM Controller

POWER MANAGEMENT

PRELIMINARY

Revision 4, April 2002

Description

Features

Applications

Typical Application Circuit

K Operation to 1MHz

K Accurate programmable maximum duty cycle

K Integrated oscillator/voltage feed forward

compensation

K Line voltage monitoring

K External frequency synchronization

K Bi-phase mode of operation for ripple reduction

K Under 100µA start-up current

K Accessible reference voltage

K VDD undervoltage lockout

K -40°C to 105°C operating temperature

K 10 lead MSOP package

K Telecom equipment and power supplies

K Networking power supplies

K Power over LAN applications

K Industrial power supplies

K Isolated power supplies

The SC4905A/B is a 10 pin BICMOS primary side voltage

mode controller for use in Isolated DC-DC and off-line

switching power supplies. It is a highly integrated solution,

requiring few external components. The device features a

high speed oscillator with integrated feed forward

compensation, accurately programmable maximum duty

cycle, voltage mode of operation, line voltage monitoring,

supply UVLO, low start up current, low voltage current limit

threshold and user accessible reference.

The SC4905A/B device operates at a fixed frequency,

highly desirable for Telecom applications. Features a

separate SYNC pin which simplifies synchronization to

an external clock. Feeding the oscillator of one device to

the SYNC of another forces biphase operation (180

degrees apart) which reduces input ripple and filter size.

The SC4905A has a turn-on threshold of 4.5V and the

SC4905B has a turn-on threshold of about 12 volts.

These devices are available in the 10 lead MSOP package.

유사한 부품 번호 - SC4905AMSTR

제조업체	부품명	데이터시트	상세설명
Semtech Corporation	SC4905A	365Kb / 24P	High Performance Voltage Mode PWM Controller
	SC4905AIMSTR	365Kb / 24P	High Performance Voltage Mode PWM Controller
	SC4905AIMSTR	369Kb / 24P	High Performance Voltage Mode PWM Controller
	SC4905AIMSTRT	365Kb / 24P	High Performance Voltage Mode PWM Controller
	SC4905AIMSTRT	369Kb / 24P	High Performance Voltage Mode PWM Controller

More results

유사한 설명 - SC4905AMSTR

제조업체	부품명	데이터시트	상세설명
STMicroelectronics	UC3844T	228Kb / 15P	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER Sep-2001
Semtech Corporation	SC4905A	365Kb / 24P	High Performance Voltage Mode PWM Controller
Holtek Semiconductor In...	HT7A3942	1Mb / 11P	High Performance Current Mode PWM Controller
STMicroelectronics	UC3844BD1013TR	239Kb / 15P	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER Mar-1999
STMicroelectronics	UC3845BD1013TR	239Kb / 15P	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER Mar-1999
Texas Instruments	TL2843B-Q1	286Kb / 18P	HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER
Semtech Corporation	SC4905A	369Kb / 24P	High Performance Voltage Mode PWM Controller
Diodes Incorporated	AP3108L	1Mb / 16P	HIGH-PERFORMANCE GREEN MODE PWM CONTROLLER Rev 4
Diodes Incorporated	AP3118	1Mb / 17P	HIGH-PERFORMANCE MULTI-MODE PWM CONTROLLER Rev 5
List of Unclassifed Man...	M5576	686Kb / 10P	High performance current mode PWM controller V1.0

More results

SC4905AMSTR 데이터시트(PDF) 1 Page - Semtech Corporation

SC4905AMSTR 데이터시트(HTML) 1 Page - Semtech Corporation

유사한 부품 번호 - SC4905AMSTR

유사한 설명 - SC4905AMSTR

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