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參數資料
型號: SG3540DW
廠商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類: 穩壓器
英文描述: OFF-LINE START-UP CONTROLLER
中文描述: 0.2 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO16
封裝: ROHS COMPLIANT, PLASTIC, SOIC-16
文件頁數: 1/6頁
文件大?。?/td> 78K
代理商: SG3540DW
4/90 Rev 1.1 2/94
Copyright
1994
L
IN
F
IN
ITY
Microelectronics Inc.
11861 Western Avenue
Garden Grove, CA 92841
(714) 898-8121
FAX: (714) 893-2570
1
SG1540/SG2540/SG3540
OFF-LINE START-UP CONTROLLER
FEATURES
Useable with primary and secondary side PWM
controllers
Micropower comparator / switch
- Internal 2.5V bandgap reference
- 50mA power switch
Squarewave oscillator
- 500Hz to 200KHz operation
- 200mA totem pole outputs
Eliminates bulky, expensive 50/60 Hz transformer
Minimizes high voltage bleeder current
Programmable start-up voltage and hysteresis
Internal and programmable overvoltage crowbar
latch
Available in 8 pin DIP, 10 pin flat pack, and 16 pin
widebody SOIC
HIGH RELIABILITY FEATURES - SG1540
Available to MIL-STD - 883
LMI level "S" processing available
DESCRIPTION
The SG1540 is an integrated circuit designed to efficiently provide
start-up power from a high-voltage DC bus to a PWM control circuit
in a switching power supply. When used on the primary side, it
reduces start-up current to less than 1mA and allows any standard
PWM control circuit to be used as a primary-side controller. When
used to power a controller on the secondary side, it efficiently
eliminates the need for a heavy 50/60Hz line transformer with its
associated low frequency magnetic fields.
The circuit consists of three sections: a micropower bandgap
comparator/power switch referenced to 2.5 volts which isolates the
start-up capacitor from its load; a high frequency square-wave
oscillator with 200mA totem-pole output for driving an isolation
transformer; and a second bandgap comparator with latching
crowbar to protect against overvoltage faults while starting or
running.
The SG1540 is specified for operation over the full military ambient
temperature range of -55°C to 125°C. The SG2540 is character-
ized for the industrial range of -25°C to 85°C, and the SG3540 is
designed for the commercial range of 0°C to 70°C.
BLOCK DIAGRAM
相關PDF資料
PDF描述
SG3540M OFF-LINE START-UP CONTROLLER
SG3540Y OFF-LINE START-UP CONTROLLER
SG2540 OFF-LINE START-UP CONTROLLER
SG2540DW OFF-LINE START-UP CONTROLLER
SG2540M OFF-LINE START-UP CONTROLLER
相關代理商/技術參數
參數描述
SG3540M 制造商:LINFINITY 功能描述:0.1 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDIP8
SG3540Y 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:OFF-LINE START-UP CONTROLLER
SG3543 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT
SG3543DW 制造商:Microsemi Corporation 功能描述:SG3543DW - Bulk
SG3543J 制造商:Microsemi Corporation 功能描述:SG3543J - Bulk
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