AC/DC转换器电路JTMB8891 JTMB8892 适用于电源适配器、机顶盒电源、小家电电源， combines a dedicated current mode PWM controller with a high voltage power MOSFET

目录

   1.产品概述           2.产品特点         3.应用范围         4.技术规格书下载（PDF文档）

    5.产品封装图        6.电路原理图      7.相关产品

一.产品概述  

      JTMB8891  JTMB8892combines a dedicated current mode PWM controller with a high voltage power MOSFET. 

It is optimized for high performance,low standby power, and cost effective off-line flyback converter 

applications in sub 15W range.

     JTMB8891 JTMB8892offers complete protection coverage with automatic self-recovery feature including

Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and under

voltage lockout (UVLO). Excellent EMI performance is achieved with proprietary frequency shuffling 

technique together with soft switching control at the totem pole gate drive output. The tone energy at

 below 20KHZ is minimized in the design and audio noise is eliminated during operation. 

    JTMB8891  JTMB8892 is offered in DIP-8 & DIP-7 package.

二.产品特点

■Power on Soft Start Reducing MOSFET VDS Stress

■Frequency shuffling for EMI

■Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design

■Audio Noise Free Operation

■Fixed 50KHZ Switching Frequency

■Internal Synchronized Slope Compensation

■Low VDD Startup Current and Low Operating Current

■Leading Edge Blanking on Current Sense Input 

   Good Protection Coverage With Auto Self-Recovery

ØVDD Over Voltage Clamp and Under Voltage Lockout with Hysteresis (UVLO)

ØLine Input Compensated Cycle-by-Cycle    Over-current Threshold Setting For Constant

   Output Power Limiting Over Universal Input Voltage Range

ØOverload Protection (OLP)

Ø Over voltage Protection (OVP)

■Pb-Free DIP-8L , DIP-7L

三.应用范围    

 Offline AC/DC flyback converter for

■Battery Charger

■PDA power supplies

■Digital Cameras and Camcorder Adaptor

■VCR, SVR, STB, DVD&DVCD Player SM

■Set-Top Box Power

■Auxiliary Power Supply for PC and Server

■Open-frame SMPS

四.技术规格书（产品PDF)    

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五.产品封装图

    六.电路原理图   

 七.相关芯片选择指南