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GM3842AS8T Datasheet(PDF) 4 Page - Gamma Microelectronics Inc.

Part # GM3842AS8T
Description  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
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Manufacturer  GAMMA [Gamma Microelectronics Inc.]
Direct Link  http://www.gammamicro.com.tw/
Logo GAMMA - Gamma Microelectronics Inc.

GM3842AS8T Datasheet(HTML) 4 Page - Gamma Microelectronics Inc.

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Power Management
4
REPRESENTATIVE BLOCK DIAGRAM
VCC
VIN
VCC 7
VC
Output
7
6
Q1
5
Power
Ground
3
Current
Sense
Input
RS
36V
+
-
+
-
VCC
UVLO
Reference
Regulator
Vref
UVLO
+
-
3.6V
Internal
Baias
R
R
Oscillator
2.5V
8
4
Vref
RT
CT
2
1
Voltage
Feedback
Input
Output
Compensation
+
1.0mA
+
-
+
-
Error
Amplifier
2R
R
1.0V
5
GND
Current Sense
Comparator
-
+
PWM Latch
S
R
Q
Q
T
+
-
+
-
=
Sink Only
Positive True Logic
(Toggle flip flop used only
in GM3844A, GM3845A)
Capacitor C
T
Latch "Set" Input
Output/ Compensation
Current Sense Input
Latch "Reset" Input
Output
Latch R / Small C
T
T
Small
/ Latch C
T
T
R
TIMING DIAGRAM
1/2 Vref


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