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UC2845BG データシート(PDF) 9 Page - ON Semiconductor

部品番号 UC2845BG
部品情報  HIGH PERFORMANCE CURRENT MODE CONTROLLERS
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ホームページ  http://www.onsemi.com
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UC2845BG データシート(HTML) 9 Page - ON Semiconductor

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UC3844B, UC3845B, UC2844B, UC2845B
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9
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)


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