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UC2842ANG View Datasheet(PDF) - ON Semiconductor

Part Name
Description
Manufacturer
UC2842ANG Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UC3842A, UC3843A, UC2842A, UC2843A
VCC
VCC 7(12)
Vref
8(14)
R
2.5V
RT
R
Internal
Bias
4(7)
CT
Voltage Feedback
Input
2(3)
Output
Compensation
1(1)
Oscillator
+
1.0mA
+
2R
Error
R
Amplifier
Reference
+
36V
Regulator
+
VCC +
UVLO
3.6V + − Vref
− UVLO
TQ
+
1.0V
S
Q
R PWM
Latch
Current Sense
Comparator
VC
7(11)
Output
6(10)
Power Ground
5(8)
Current Sense Input
3(5)
GND 5(9)
+
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
=
Sink Only
Positive True Logic
Figure 18. Representative Block Diagram
Vin
Q1
RS
Capacitor CT
Latch
‘‘Set’’ Input
Output/
Compensation
Current Sense
Input
Latch
‘‘Reset’’ Input
Output
Large RT/Small CT
Figure 19. Timing Diagram
Small RT/Large CT
http://onsemi.com
8
 

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