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SG3526_06

更新时间： 2024-11-11 03:32:27
品牌 Logo 应用领域
安森美 - ONSEMI 脉冲
页数 文件大小 规格书
9页 268K
描述
Pulse Width Modulation Control Circuit

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SG3526_06 数据手册

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SG3526  
Pulse Width Modulation  
Control Circuit  
The SG3526 is a high performance pulse width modulator  
integrated circuit intended for fixed frequency switching regulators  
and other power control applications.  
Functions included in this IC are a temperature compensated  
voltage reference, sawtooth oscillator, error amplifier, pulse width  
modulator, pulse metering and steering logic, and two high current  
totem pole outputs ideally suited for driving the capacitance of power  
FETs at high speeds.  
http://onsemi.com  
MARKING  
DIAGRAM  
18  
Additional protective features include soft start and undervoltage  
lockout, digital current limiting, double pulse inhibit, adjustable dead  
time and a data latch for single pulse metering. All digital control ports  
are TTL and B−series CMOS compatible. Active low logic design  
allows easy wired−OR connections for maximum flexibility. The  
versatility of this device enables implementation in single−ended or  
push−pull switching regulators that are transformerless or transformer  
coupled. The SG3526 is specified over a junction temperature range of  
0° to +125°C.  
PDIP−18  
N SUFFIX  
CASE 707  
SG3526N  
AWLYYWW  
18  
1
1
A
= Assembly Location  
WL = Wafer Lot  
YY = Year  
WW = Work Week  
• 8.0 V to 35 V Operation  
PIN CONNECTIONS  
• 5.0 V ±1% Trimmed Reference  
• 1.0 Hz to 400 kHz Oscillator Range  
• Dual Source/Sink Current Outputs: ±100 mA  
• Digital Current Limiting  
• Programmable Dead Time  
• Undervoltage Lockout  
• Single Pulse Metering  
• Programmable Soft−Start  
• Wide Current Limit Common Mode Range  
• Guaranteed 6 Unit Synchronization  
+Error  
−Error  
1
2
3
4
5
6
7
8
9
18  
17  
V
V
ref  
CC  
Compensation  
16 Output B  
15 Ground  
C
Soft−Start  
Reset  
14 V  
C
−CS  
+CS  
13 Output A  
12 Sync  
Shutdown  
11  
10  
R
C
Deadtime  
T
18  
V
ref  
R
T
Under−  
Voltage  
Lockout  
Reference  
Regulator  
17  
V
CC  
(Top View)  
15  
12  
Ground  
To Internal  
Circuitry  
14  
13  
Sync  
V
C
11  
9
10  
R
C
Deadtime  
ORDERING INFORMATION  
Oscillator  
R
C
T
T
Output  
A
Device  
SG3526N  
Package  
Shipping  
20 Units/Rail  
5
4
PDIP−18  
Reset  
Soft  
Start  
Toggle  
F/F  
Soft−Start  
Memory  
F/F  
3
Q
Compensation  
S
V
CC  
T
Q
S
Q
Q
R Q  
−
+
1
+Error  
−Error  
+
−
2
R
16  
Amp  
100 mV  
7
Output  
B
Metering  
F/F  
+
−
+C.S.  
−C.S.  
6
8
Shutdown  
Figure 1. Representative Block Diagram  
© Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
July, 2006 − Rev. 4  
SG3526/D  
1234567...9

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