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L4990 Datasheet (PDF) - STMicroelectronics

L4990 Datasheet PDF - STMicroelectronics
No. de pieza L4990
Descarga  L4990 Descarga

Tamaño del archivo   322.27 Kbytes
Page   24 Pages
Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Descripción Electrónicos PRIMARY CONTROLLER

L4990 Datasheet (PDF)

Go To PDF Page Descarga Datasheet
L4990 Datasheet PDF - STMicroelectronics

No. de pieza L4990
Descarga  L4990 Click to download

Tamaño del archivo   322.27 Kbytes
Page   24 Pages
Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Descripción Electrónicos PRIMARY CONTROLLER

L4990 Datasheet (HTML) - STMicroelectronics

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L4990 Detalles de producto

DESCRIPTION

This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control. Based on a standard current mode PWM control ler this device includes some features as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns (typ) leading edge blanking on current sense, pulse by pulse current limit and overcurrent protection with soft start in tervention.



■ CURRENT-MODE CONTROL PWM

■ SWITCHING FREQUENCY UP TO 1MHz

■ LOW START-UP CURRENT < 0.45mA

■ HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A)

■ FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION

■ PROGRAMMABLE DUTY CYCLE

■ 100% AND 50% MAXIMUM DUTY CYCLE LIMIT

■ PROGRAMMABLE SOFT START

■ PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY

■ PWM UVLO WITH HYSTERESIS

■ IN/OUT SYNCHRONIZATION

■ DISABLE LATCHED

■ INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE

■ PACKAGE: DIP16 AND SO16W



 




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Acerca de STMicroelectronics


STMicroelectronics es un fabricante multinacional de electrónica y semiconductores con sede en Ginebra, Suiza.

La compañía ofrece una amplia gama de productos que incluyen microcontroladores, sensores, amplificadores de energía y circuitos integrados para diversas aplicaciones en los mercados automotrices, industriales y de consumo.

Fundada en 1987, Stmicroelectronics tiene operaciones en más de 100 países y es una de las compañías semiconductores más grandes del mundo.

*Esta información es solo para fines informativos generales, no seremos responsables de ninguna pérdida o daño causado por la información anterior.




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