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UC2843BDR2G Datasheet(PDF) 10 Page - ON Semiconductor

Part # UC2843BDR2G
Description  High Performance Current Mode Controllers
Download  25 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

UC2843BDR2G Datasheet(HTML) 10 Page - ON Semiconductor

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UC3842B, UC3843B, UC2842B, UC2843B
www.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 19. Representative Block Diagram
Figure 20. 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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