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STSR2PMCD PDF预览

STSR2PMCD

更新时间: 2024-02-14 17:56:51
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 驱动
页数 文件大小 规格书
12页 291K
描述
FORWARD SYNCHRONOUS RECTIFIERS SMART DRIVER

STSR2PMCD 数据手册

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STSR2P/  
STSR2PM  
FORWARD SYNCHRONOUS  
RECTIFIERS SMART DRIVER  
SUPPLY VOLTAGE RANGE: 4.5V TO 5.5V  
TYPICAL PEAK OUTPUT CURRENT:  
SOURCE -2A, SINK 3.5A  
OPERATING FREQUENCY: 20 TO 750 KHZ  
SMART TURN-OFF ANTICIPATION TIMING  
OPERATION INDEPENDENT FROM THE  
FORWARD MAGNETIC RESET TECHNIQUE  
SO-8  
POSSIBILITY TO OPERATE IN  
DISCONTINUOUS MODE  
DESCRIPTION  
anticipation in turning-off the OUT  
with  
GATE1  
respect to the clock signal transition is provided,  
STSR2P Smart Driver IC provides two  
complementary high current outputs to drive  
Power Mosfets. The IC is dedicated to properly  
drive secondary Synchronous Rectifiers in  
medium power, low output voltage, high efficiency  
Forward Converters. From a synchronizing clock  
input, STSR2P generates two driving signals with  
the self-setting of dead time between  
complementary pulses. The IC operation prevents  
while the anticipation in turning off the OUT  
GATE2  
can be set through external components. The  
adopted transitions revelation mechanism makes  
circuit operation independent by the forward  
magnetic reset technique used, avoiding most of  
the common problems inherent in self-driven  
synchronous rectifiers. A special Inhibit function  
allows the shut-off of OUT  
. This feature  
GATE2  
makes discontinuous conduction mode possible  
and prevents the freewheeling mosfet from  
sinking current from the output.  
STSR2P automatically turns off the outputs when  
duty-cycle is lower than 13%, while STSR2PM  
works even at very low duty-cycle values.  
secondary  
side  
shoot-through  
conditions  
providing proper timing at the outputs turn-off  
transition. This smart function operates through a  
fast cycle-after-cycle control logic mechanism  
based on an internal high frequency oscillator,  
synchronized by the clock signal.  
A fixed  
SCHEMATIC DIAGRAM  
Vcc  
2
5.7V  
+
BIAS  
UVLO  
PEAK  
DETECTOR  
ANTICIPATION  
SET  
SETANT2  
3
4
CK  
+
+
HIGH  
FREQUENCY  
OSCILLATOR  
1
7
OUTGate1  
OUTGate2  
OUTPUT  
BUFFERS  
DIGITAL  
CONTROL  
-
+
INHIBIT  
5
25mV  
6
8
SGLGND  
PWRGND  
September 2003  
1/12  

STSR2PMCD 替代型号

型号 品牌 替代类型 描述 数据表
STSR2PMCD-TR STMICROELECTRONICS

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