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LTC3901 PDF预览

LTC3901

更新时间: 2024-01-05 13:01:55
品牌 Logo 应用领域
凌特 - Linear 驱动器转换器
页数 文件大小 规格书
16页 230K
描述
Secondary Side Synchronous Driver for Push-Pull and Full-Bridge Converters

LTC3901 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:SSOP包装说明:SSOP,
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.36高边驱动器:YES
接口集成电路类型:BUFFER OR INVERTER BASED MOSFET DRIVERJESD-30 代码:R-PDSO-G16
JESD-609代码:e3长度:4.8895 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:70 °C
最低工作温度:标称输出峰值电流:2 A
封装主体材料:PLASTIC/EPOXY封装代码:SSOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.727 mm最大供电电压:11 V
最小供电电压:4.5 V标称供电电压:5 V
表面贴装:YES温度等级:COMMERCIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.635 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:3.899 mm
Base Number Matches:1

LTC3901 数据手册

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LTC3901  
Secondary Side  
Synchronous Driver for Push-Pull  
and Full-Bridge Converters  
U
FEATURES  
DESCRIPTIO  
The LTC®3901 is a secondary side synchronous rectifier  
driver designed to be used in isolated push-pull and full-  
bridge converter power supplies. The chip drives two  
external N-channel MOSFETs and accepts a transformer-  
generated bipolar input to maintain sychronization with  
the primary side controller.  
N-Channel Synchronous MOSFET Driver  
Programmable Timeout  
Reverse Inductor Current Sense  
Gate Drive Transformer Synchronization  
Sequence Monitor  
Wide VCC Supply Range: 4.5V to 11V  
15ns Rise/Fall Times at VCC = 5V, CL = 4700pF  
The LTC3901 provides a full range of protection features  
for the external MOSFETs. A programmable timeout func-  
tion is included that disables both drivers when the syn-  
chronization signal is missing or incorrect. Additionally,  
the chip senses the output inductor current through the  
drain-source resistance of the two MOSFETs, turning off  
theMOSFETsiftheinductorcurrentreverses.TheLTC3901  
also shuts off the drivers if the supply is low or if the  
synchronization sequence is incorrect.  
Undervoltage Lockout  
Small 16-Lead SSOP Package  
U
APPLICATIO S  
48V Input Isolated DC/DC Converters  
Isolated Telecom Power Supplies  
Distributed Power Step-Down Converters  
Industrial Control System Power Supplies  
Automotive and Heavy Equipment  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
L1  
V
ISOLATION  
BARRIER  
OUT  
+
12V  
C
OUT  
T1  
V
IN  
36V TO 72V  
+
CSE  
ME  
V
CC  
MA  
MB  
ME  
CSE  
GND  
LTC3901  
DRVA  
DRVB  
+
CSF  
MF  
PV  
CC  
LTC3723  
PUSH-PULL  
CONTROLLER  
MF  
CSF  
PGND  
COMP V SDRA SDRB  
FB  
TIMER  
SYNC  
T2  
OUT  
FB  
LT4430 OR LT1431  
OPTOCOUPLER  
DRIVER  
COMP  
3901 F01  
Figure 1. Simplified Isolated Push-Pull Converter  
3901f  
1

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