參數(shù)資料
型號(hào)： SG3525
廠商： Motorola, Inc.
英文描述： PULSE WIDTH MODULATOR CONTROL CIRCUITS
中文描述： 脈寬調(diào)制控制電路
文件頁(yè)數(shù)： 1/8頁(yè)
文件大?。?/td> 205K
代理商： SG3525
SEMICONDUCTOR
TECHNICAL DATA
PULSE WIDTH MODULATOR
CONTROL CIRCUITS
PIN CONNECTIONS
Order this document by SG3525A/D
N SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16L)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
(Top View)
Inv. Input
Sync
OSC. Output
RT
Discharge
Soft–Start
Noninv. Input
CT
Compensation
Shutdown
Output A
VC
Output B
VCC
Vref
Ground
Device
Operating
Temperature Range
Package
ORDERING INFORMATION
SG3525AN
SG3525ADW
TA = 0
°
to +70
°
C
Plastic DIP
SO–16L
SG3527AN
Plastic DIP
16
1
1
MOTOROLA ANALOG IC DEVICE DATA
The SG3525A, SG3527A pulse width modulator control circuits offer
improved performance and lower external parts count when implemented for
controlling all types of switching power supplies. The on–chip +5.1 V
reference is trimmed to
±
1% and the error amplifier has an input
common–mode voltage range that includes the reference voltage, thus
eliminating the need for external divider resistors. A sync input to the
oscillator enables multiple units to be slaved or a single unit to be
synchronized to an external system clock. A wide range of deadtime can be
programmed by a single resistor connected between the CT and Discharge
pins. These devices also feature built–in soft–start circuitry, requiring only an
external timing capacitor. A shutdown pin controls both the soft–start circuitry
and the output stages, providing instantaneous turn off through the PWM
latch with pulsed shutdown, as well as soft–start recycle with longer
shutdown commands. The under voltage lockout inhibits the outputs and the
changing of the soft–start capacitor when VCC is below nominal. The output
stages are totem–pole design capable of sinking and sourcing in excess of
200 mA. The output stage of the SG3525A features NOR logic resulting in a
low output for an off–state while the SG3527A utilized OR logic which gives a
high output when off.
8.0 V to 35 V Operation
5.1 V
±
1.0% Trimmed Reference
100 Hz to 400 kHz Oscillator Range
Separate Oscillator Sync Pin
Adjustable Deadtime Control
Input Undervoltage Lockout
Latching PWM to Prevent Multiple Pulses
Pulse–by–Pulse Shutdown
Dual Source/Sink Outputs:
±
400 mA Peak
Representative Block Diagram
NOR
NOR
16
15
12
4
3
6
5
7
9
1
2
8
10
Reference
Regulator
Under–
Voltage
Lockout
Oscillator
Latch
F/F
Q
Q
– PWM
–
Error
Amp
+
+
–
To Internal
Circuitry
VREF
Vref
VCC
Ground
OSC Output
Sync
RT
CT
Discharge
Compensation
INV. Input
Noninv. Input
CSoft–Start
Shutdown
5.0k
S
R
S
50
μ
A
VC
13
Output A
11
14
Output B
SG3525A Output Stage
13
VC
Output A
11
Output B
14
SG3527A
Output Stage
OR
OR
5.0k
Motorola, Inc. 1996
Rev 2
相關(guān)PDF資料
PDF描述
SG3525A PULSE WIDTH MODULATOR CONTROL CIRCUITS
SG3525ADW PULSE WIDTH MODULATOR CONTROL CIRCUITS
SG3525AN PULSE WIDTH MODULATOR CONTROL CIRCUITS
SG3527AN PULSE WIDTH MODULATOR CONTROL CIRCUITS
SG3527A REGULATING PULSE WIDTH MODULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SG3525A 制造商:LINER 制造商全稱:Linear Technology 功能描述:Regulating Pulse Width Modulators
SG3525A_05 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Pulse Width Modulator Control Circuit
SG3525ADW 功能描述:電壓模式 PWM 控制器 8-35V PWM RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
SG3525ADWG 功能描述:電壓模式 PWM 控制器 8-35V PWM RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
SG3525ADWR2 功能描述:電壓模式 PWM 控制器 8-35V PWM RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
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