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UC284XBDG Fiches technique(PDF) 8 Page - ON Semiconductor

No de pièce UC284XBDG
Description  High Performance Current Mode Controllers
Download  19 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

UC284XBDG Fiches technique(HTML) 8 Page - ON Semiconductor

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UC3844B, UC3845B, UC2844B, UC2845B
http://onsemi.com
8
Figure 16. Representative Block Diagram
Figure 17. Timing Diagram
Capacitor CT
Latch “Set"
Input
Output/
Compensation
Current Sense
Input
Latch “Reset"
Input
Output
Large RT/Small CT
Small RT/Large CT
+
-
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.
PWM
Latch
(See
Text)
T


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