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UC3843BD1G Datasheet(PDF) 10 Page - ON Semiconductor

No. de pieza UC3843BD1G
Descripción Electrónicos  High Performance Current Mode Controllers
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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UC3843BD1G Datasheet(HTML) 10 Page - ON Semiconductor

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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
http://onsemi.com
10
+
Reference
Regulator
VCC
UVLO
+
Vref
UVLO
3.6V
36V
S
R
Q
Internal
Bias
+ 1.0mA
Oscillator
2.5V
R
R
R
2R
Error
Amplifier
Voltage
Feedback
Input
Output/
Compensation
Current Sense
Comparator
1.0V
VCC 7(12)
GND
5(9)
VC
7(11)
Output
6(10)
Power Ground
5(8)
Current Sense Input
3(5)
RS
Q1
VCC
Vin
1(1)
2(3)
4(7)
8(14)
RT
CT
Vref
= Sink Only Positive True Logic
Pin numbers adjacent to terminals are for the 8−pin dual−in−line package.
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
Figure 18. Representative Block Diagram
Figure 19. Timing Diagram
Large RT/Small CT
Small RT/Large CT
PWM
Latch
(See
Text)
Capacitor CT
Latch
Set" Input
Output/
Compensation
Current Sense
Input
Latch
Reset" Input
Output


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