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SG1526B PDF预览

SG1526B

更新时间: 2024-10-01 14:51:59
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
12页 513K
描述
The SG1526B is a high-performance pulse width modulator for switching power supplies which offers

SG1526B 数据手册

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SG1526B/SG2526B/SG3526B  
REGULATING PULSE WIDTH MODULATOR  
FEATURES  
DESCRIPTION  
8V to 35V Operation  
.
The SG1526B is a high-performance pulse width modulator  
for switching power supplies which offers improved  
functional and electrical characteristics over the industry-  
standard SG1526. A direct pin-for-pin replacement for the  
earlier device with all its features, it incorporates the  
following enhancements: a bandgap reference circuit for  
improved regulation and drift characteristics, improved  
undervoltage lockout, lower temperature coefficients on  
oscillator frequency and current-sense threshold, tighter  
tolerance on softstart time, much faster SHUTDOWN  
response, improved double-pulse supperession logic for  
higher speed operation, and an improved output driver  
design with low shoot-through current, and faster rise and  
fall times. This versatile device can be used to implement  
single-ended or push-pull switching regulators of either  
polarity, both transformerless and transformer-coupled. The  
SG1526B is specified for operation over the full military  
ambient temperature range of -55°C to 150°C. The  
SG2526B is characterized for the industrial range of -25°C  
to 150°C, and the SG3526B is designed for the commercial  
range of 0°C to 125°C.  
5V Low drift 1% Bandgap Reference  
1Hz to 500kHz Oscillator Range  
Dual 100mA Source/Sink  
Digital Current Limiting  
.
.
.
.
. Double Pulse Suppression  
.
.
.
Programmable Deadtime  
Improved Undervoltage Lockout  
Single Pulse Metering  
. Programmable Soft-start  
.
.
.
.
Wide current Limit Common Mode Range  
TTL/CMOS Compatible Logic Ports  
Symmetry Correction Capability  
Guaranteed 6 Unit Synchronization  
. Shoot-through Currents Less than 100mA  
. Improved Shutdown Delay  
Improved Rise and Fall Time  
.
HIGH RELIABILITY FEATURES  
Available To MIL-STD-883, ¶ 1.2.1  
. Available to DSCC - Standard Microcircuit  
.
Drawing (SMD)  
MIL-M38510/12603BVA - SG1526BJ-JAN  
.
. Radiation data available  
.
MSC-AMS Level "S" Processing Available  
BLOCK DIAGRAM  
VREF  
+VC  
Reference  
Regulator  
Undervoltage  
Lockout  
+VIN  
GROUND  
To Internal  
Circuitry  
RD  
RT  
SYNC  
Oscillator  
OUTPUT A  
CT  
RESET  
Soft  
Start  
CSOFTSTART  
S
R
Q
Q
T
COMPENSATION  
+VIN  
Amp  
Q
S
MEMORY  
F/F  
TOGGLE  
F/F  
Q
Q
+ ERROR  
— ERROR  
D
OUTPUT B  
METERING  
F/F  
+ C.S.  
— C.S.  
SHUTDOWN  
December 2014 Rev1.2  
www.microsemi.com  
© 2014 Microsemi Corporation  
1

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