UC3849B Datasheet PDF - UTC LOW COST POWER-SAVING MODE PWM CONTROLLER Specs

UC3849B - LOW COST POWER-SAVING MODE PWM CONTROLLER

Datasheet Summary

Description

The UC3849B is a high performance current mode PWM controller ideally suited for low standby power.

Low VDD startup current make the power reliable on startup design and a large value resistor could be used in the startup circuit to minimize the standby power.

Features

S.
UTC proprietary frequency hopping technology for Improved EMI performance.
Power-saving mode for high light-load and standby efficiency.
Soft Start.
Dynamic peak current limiting for constant output power.
Built-in synchronized slope compensation.
OLP,OVP and VDD clamp for higher security.
Programming OTP for higher security.
Fixed switch frequency 65kHz.
Gate output voltage clamped at 15V.
Low start-up current.
Cycle-by-cycle Current.

Datasheet Details

Part number	UC3849B
Manufacturer	UTC
File Size	359.83 KB
Description	LOW COST POWER-SAVING MODE PWM CONTROLLER
Datasheet	UC3849B Datasheet
Additional preview pages of the UC3849B datasheet.

📁 Similar Datasheet

UC3840 - PWM CONTROLLER (STMicroelectronics)

UC3841 - Programmable Off-Line PWM Controller (Unitrode)

UC3842 - Current-mode PWM controller (Philips)

UC3842 - SMPS Controller (Fairchild)

UC3842 - CURRENTMODE PWM CONTROLLER (ST Microelectronics)

UC3842 - High Performance Current Mode Controller (HOTCHIP)

UC3842 - Current-Mode PWM Controllers (Texas Instruments)

UC3842 - PWM controller (UMW)

UC3842A - HIGH-PERFORMANCE CONTROLLERS (Motorola)

UC3842A - SMPS Controller (Fairchild Semiconductor)

Full PDF Text Transcription

Click to expand full text

UNISONIC TECHNOLOGIES CO., LTD UC3849B LINEAR INTEGRATED CIRCUIT LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS  DESCRIPTION The UC3849B is a high performance current mode PWM controller ideally suited for low standby power. Low VDD startup current make the power reliable on startup design and a large value resistor could be used in the startup circuit to minimize the standby power. At no load condition, the IC operates in power-saving mode for lower standby power, decreasing frequency for Higher conversion efficiency at light load condition.

Published: Apr 20, 2020 |