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SC4911 - Bias/Primary Side PWM Controller

Datasheet Summary

Description

The SC4911 is a highly integrated bias/primary side PWM controller designed for off-line or isolated dc-dc converters in telecommunication and data communication applications.

Features

  • ‹ ‹ ‹ ‹ ‹ ‹ Programmable switching frequency up to 500kHz Line UVLO Protection Undervoltage Lockout Low startup current (45µA) Cycle by cycle current limit 8 pin MSOP. Available in Lead-free, fully WEEE and RoHS compliant.

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Datasheet Details

Part number SC4911
Manufacturer Semtech Corporation
File Size 258.20 KB
Description Bias/Primary Side PWM Controller
Datasheet download datasheet SC4911 Datasheet
Additional preview pages of the SC4911 datasheet.

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Full PDF Text Transcription

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Bias/Primary Side PWM Controller with Ultra Low Start-up Current POWER MANAGEMENT Description The SC4911 is a highly integrated bias/primary side PWM controller designed for off-line or isolated dc-dc converters in telecommunication and data communication applications. The high degree of integration minimizes the amount of discrete parts needed and leads to substantial cost and space saving converter designs. The circuitry of the SC4911 includes line voltage UVLO featuring startup current less than 50µA and programwww.DataSheet4U.com mable switching frequency. The device supply is derived from an auxiliary winding on the transformer. The auxiliary winding could also provide output feedback information if an optocoupler is not used.
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