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參數(shù)資料
| 型號(hào)： | SG1540Y/883B |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類(lèi)： | 穩(wěn)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, CDIP8 |
| 封裝： | HERMETIC SEALED, CERAMIC, DIP-8 |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大小： | 98K |
| 代理商： | SG1540Y/883B |
Rev 1.1a 3/05
M
icrosemi Inc.
Copyright
1994
11861 Western Avenue
∞
∞ Garden Grove, CA 92841
1
(714) 898-8121
∞
∞ FAX: (714) 893-2570
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
O
B
SO
LETE
PRO
D
UCT
NOT
RECOMMENDED
FOR
NEW
DESIGNS
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| SG1635R/883B | 5 A HALF BRIDGE BASED PRPHL DRVR, MBFM5 |
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| SG20SC9M | 10 A, 90 V, SILICON, RECTIFIER DIODE, TO-220AB |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SG1543 | 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT |
| SG1543_1 | 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT |
| SG1543J | 制造商:Microsemi Corporation 功能描述:SG1543J - Bulk |
| SG1543J/883B | 制造商:Silicon General 功能描述:_ 制造商: 功能描述: 制造商:undefined 功能描述: |
| SG1543J/DESC | 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT |
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