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SG3526DW 参数 Datasheet PDF下载

SG3526DW图片预览
型号: SG3526DW
PDF下载: 下载PDF文件 查看货源
内容描述: 调整脉冲宽度调制器 [REGULATING PULSE WIDTH MODULATOR]
分类和应用: 稳压器开关式稳压器或控制器电源电路开关式控制器脉冲光电二极管
文件页数/大小: 9 页 / 185 K
品牌: MICROSEMI [ MICROSEMI CORPORATION ]
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SG1526/SG2526/SG3526
REGULATING PULSE WIDTH MODULATOR
DESCRIPTION
The SG1526 is a high performance monolithic pulse width modulator
circuit designed for fixed-frequency switching regulators and other
power control applications. Included in an 18-pin dual-in-line package
are a temperature compensated voltage reference, sawtooth oscillator,
error amplifier, pulse width modulator, pulse metering and steering logic,
and two low impedance power drivers. Also included are protective
features such as soft-start and undervoltage lockout, digital current
limiting, double pulse inhibit, a data latch for single pulse metering,
adjustable deadtime, and provision for symmetry correction inputs. For
ease of interface, all digital control ports are TTL and B-series CMOS
compatible. Active LOW logic design allows wired-OR connections for
maximum flexibility. This versatile device can be used to implement
single-ended or push-pull switching regulators of either polarity, both
transformerless and transformer coupled. The SG1526 is characterized
for operation over the full military ambient junction temperature range of
-55°C to +150°C. The SG2526 is characterized for operation from -25°C
to +150°C, and the SG3526 is characterized for operation from 0°C to
+125°C.
FEATURES
8 to 35 volt operation
5V reference trimmed to ±1%
1Hz to 350KHz oscillator range
Dual 100mA source/sink outputs
Digital current limiting
Double pulse suppression
Programmable deadtime
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
HIGH RELIABILITY FEATURES - SG1526
Available to MIL-STD-883B and DESC SMD
Radiation data available
LMI level "S"processing available
BLOCK DIAGRAM
V
REF
+V
+V
IN
GROUND
R
D
R
T
C
T
Reference
Regulator
Undervoltage
Lockout
SYNC
C
To Internal
Circuitry
Oscillator
OUTPUT A
RESET
C
SOFTSTART
Soft
Start
+V
IN
S
Q
Q
METERING
F/F
D
S
T
R
Q
Q
Q
TOGGLE
F/F
OUTPUT B
COMPENSATION
+ ERROR
Amp
— ERROR
MEMORY
F/F
+ C.S.
— C.S.
SHUTDOWN
4/90 Rev 1.1 2/94
Copyright
©
1994
1
11861 Western Avenue
Garden Grove, CA 92841
(714) 898-8121
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.