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UC2845A Fiches technique(PDF) 11 Page - Texas Instruments

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No de pièce UC2845A
Description  Current-Mode PWM Controller
Download  45 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC2845A Fiches technique(HTML) 11 Page - Texas Instruments

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VREF
RT/CT
GND
For RT > 5 k
T
T
1.72
f
R
/ C
»
8
4
5
RT
CT
470 pF
1 nF
2.2 nF
4.7nF
C
T
300
1 k
3 k
10 k
30 k
100 k
R (
T
)
1 M
100 k
10 k
300
1 k
3 k
10 k
30 k
100 k
R (
T
)
100
80
60
40
20
During UVLO, the Output is low.
11
UC1842A, UC1843A, UC1844A, UC1845A
UC2842A, UC2843A, UC2844A, UC2845A
UC3842A, UC3843A, UC3844A, UC3845A
www.ti.com
SLUS224E – SEPTEMBER 1994 – REVISED JULY 2016
Product Folder Links: UC1842A UC1843A UC1844A UC1845A UC2842A UC2843A UC2844A UC2845A UC3842A
UC3843A UC3844A UC3845A
Submit Documentation Feedback
Copyright © 1994–2016, Texas Instruments Incorporated
Feature Description (continued)
Figure 5. Undervoltage Lockout
8.3.5 Oscillator
Figure 6. Oscillator Frequency vs Timing Resistance
Figure 7. Maximum Duty Cycle vs Timing Resistance
Figure 8. Oscillator Section
Figure 9. Slope Compensation


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