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SIP11203

更新时间： 2024-09-29 09:25:11
品牌 Logo 应用领域
威世 - VISHAY 驱动器放大器
页数 文件大小 规格书
18页 385K
描述
Synchronous Rectifier Driver with Power Up/Down Control, Output OVP, Error Amplifier and Precision Reference

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SIP11203 数据手册

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SiP11203, SiP11204  
Vishay Siliconix  
Synchronous Rectifier Driver with Power Up/Down Control,  
Output OVP, Error Amplifier and Precision Reference  
DESCRIPTION  
FEATURES  
The SiP11203/SiP11204 provide the secondary side  
error amplifier, reference voltage and synchronous  
rectifier drivers for isolated converter topologies. Both  
ICs are capable of being powered via conventional  
bias supplies (output inductor winding or power  
transformer winding), or from a pulse transformer  
supplying the gate timing signals, and both parts  
generate a regulated supply for powering the error  
amplifier and control circuitry.  
During power-up the SiP11203/SiP11204 ensure that  
the synchronous rectifiers are held off until the supply  
voltages are adequate to guarantee effective  
operation of the driver circuits. During the soft-start  
interval, a gradual ramp-up of the synchronous  
rectifier conduction time is provided. Both ICs also  
allow control of the discharge rate of the synchronous  
rectifier driver outputs during power-down.  
• High Current synchronous rectifier drivers  
- 2.2 A source and 4 A sink  
• Driver switching synchronized with primary  
controller  
• Full output control during power-up and power-  
down  
• 5.5 V to 13 V operating voltage range  
• 1.225 V on board bandgap voltage reference  
• Can be powered from the pulse transformer  
supplying synchronous rectifier timing signals  
• On-chip ground-sensing error amplifier  
• Programmable rising edge delay  
• Output over-voltage protection (OVP)  
- SiP11203 turns synchronous rectifiers on  
- SiP11204 turns synchronous rectifiers off  
• Secondary-side companion chip for the Si9122  
Half-Bridge Controller IC  
The SiP11203 and SiP11204 are available in a  
Pb-free MLP44-16 package and are rated to handle  
the industrial ambient temperature range of - 40 to 85 °C.  
APPLICATIONS  
• High efficiency DC-DC Converter Modules and  
Bricks  
• Telecom and Server Power Supplies  
• High Efficiency Intermediate Bus Converters (IBC)  
• Half-bridge, full-bridge, or push-pull primary DC-DC  
topologies  
• Center-tapped or current-doubler secondary  
configurations  
TYPICAL APPLICATION CIRCUIT  
VIN  
Half Bridge  
PWM  
Controller  
VOUT  
GND  
OUT A  
OUT B  
Vin  
OVPin  
EA+  
GND  
EA-  
SiP11203  
SiP11204  
SRH  
SRL  
IN A  
Vref  
IN B  
EAout  
PGND  
GND  
Pulse  
Transformer  
VL Cpd Rdel Rpd  
Optoisolator  
ZF1  
ZF2  
Document Number: 73868  
S11-0975–Rev. C, 16-May-11  
www.vishay.com  
1
This document is subject to change without notice.  
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
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