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SG3845DT

更新时间： 2024-11-26 13:13:27
品牌 Logo 应用领域
美高森美 - MICROSEMI 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
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SG3845DT 数据手册

 浏览型号SG3845DT的Datasheet PDF文件第2页浏览型号SG3845DT的Datasheet PDF文件第3页浏览型号SG3845DT的Datasheet PDF文件第4页浏览型号SG3845DT的Datasheet PDF文件第5页浏览型号SG3845DT的Datasheet PDF文件第6页浏览型号SG3845DT的Datasheet PDF文件第7页 
SG1844/SG1845 Series  
CURRENT MODE PWM CONTROLLER  
P R O D U C T I O N D A T A S H E E T  
T H E I N F I N I T E P O W E R O F I N N O V A T I O N  
KEY FEATURES  
DESCRIPTION  
The SG1844/45 family of control ICs and start-up current of less than 1mA. The  
provides all the necessary features to totem-pole output is optimized to drive the  
implement off-line fixed frequency, current- gate of a power MOSFET. The output is low  
mode switching power supplies with a in the off state to provide direct interface to  
minimum number of external components. an N-channel device. Both operate up to a  
Current-mode architecture demonstrates maximum duty cycle range of zero to <50%  
improved line regulation, improved load due to an internal toggle flip-flop which  
regulation, pulse-by pulse current limiting blanks the output off every other clock  
and inherent protection of the power supply cycle. The SG1844/45 is specified for  
output switch. The bandgap reference is operation over the full military ambient  
trimmed to ±1% over temperature. Oscillator temperature range of -55°C to 125°C. The  
discharge current is trimmed to less than SG2844/45 is specified for the industrial  
±10%. The SG1844/45 has undervoltage range of -25°C to 85°C, and the SG3844/45  
„
„
„
„
„
OPTIMIZED FOR OFF-LINE  
CONTROL  
LOW START-UP CURRENT  
(<1mA)  
AUTOMATIC FEED FORWARD  
COMPENSATION  
TRIMMED OSCILLATOR  
DISCHARGE CURRENT  
PULSE-BY-PULSE CURRENT  
LIMITING  
ENHANCED LOAD RESPONSE  
CHARACTERISTICS  
UNDER-VOLTAGE LOCKOUT  
WITH 6V HYSTERESIS  
(SG1844 only)  
DOUBLE PULSE  
SUPPRESSION  
HIGH-CURRENT TOTEM-POLE  
OUTPUT  
INTERNALLY TRIMMED  
BANDGAP REFERENCE  
500kHz OPERATION  
UNDERVOLTAGE LOCKOUT  
SG1844 - 16 volts SG1845 - 8.4  
volts  
„
„
„
„
„
„
lockout, current-limiting circuitry  
is designed for the commercial range of 0°C  
to 70°C.  
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com  
„
„
PRODUCT HIGHLIGHT  
„
LOW SHOOT-THROUGH  
CURRENT <75mA OVER  
TEMPERATURE  
R
ST  
I
AC  
INPUT  
ST  
HIGH RELIABILITY  
FEATURES  
VCC  
„
„
AVAILABLE TO MIL-STD-883B  
LINFINITY LEVEL "S"  
PROCESSING AVAILABLE  
SG3844  
PACKAGE ORDER INFO  
Plastic DIP  
8-Pin  
Plastic DIP  
14-Pin  
Plastic SOIC  
8-Pin  
Plastic SOIC  
14-Pin  
Ceramic Dip  
8-Pin  
Ceramic DIP  
14-Pin  
Cer Flatpack  
10-Pin  
Ceramic LCC  
20-Pin  
M
N
DM  
D
Y
J
F
L
TA (°C)  
RoHS Compliant / Pb-free  
Transition DC: 0503  
RoHS Compliant / Pb-free  
Transition DC:0440  
SG3844M  
SG3844N  
SG3845N  
SG28424N  
SG2845N  
SG3844DM  
SG3844D  
SG3845D  
SG2842D  
SG2845D  
SG3844Y  
SG3845Y  
SG2844Y  
SG2845Y  
SG1844Y  
SG1845Y  
SG3844J  
SG3845J  
SG2844J  
SG2845J  
SG1844J  
0 to 70  
SG3845M  
SG2844M  
SG2845M  
SG3845DM  
SG2844DM  
SG2845DM  
-25 to 85  
-55 to  
125  
SG1844L  
SG1845L  
SG1845J  
MIL-  
STD/883  
DESC  
SG1842Y/883B  
SG1845Y/883B  
SG1844Y/DESC  
SG1844J/883B  
SG1845J/883  
SG1844J/DESC SG1844F/DESC SG1844L/DESC  
SG1844L/883B  
SG1845L/883B  
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LXSG3844N-TR)  
Copyright © 2000  
Rev. 1.6c,2006-02-02  
1
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