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UC2845ADM Fiches technique(PDF) 5 Page - Microsemi Corporation

No de pièce UC2845ADM
Description  CURRENT MODE PWM CONTROLLER
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Fabricant  MICROSEMI [Microsemi Corporation]
Site Internet  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

UC2845ADM Fiches technique(HTML) 5 Page - Microsemi Corporation

  UC2845ADM Datasheet HTML 1Page - Microsemi Corporation UC2845ADM Datasheet HTML 2Page - Microsemi Corporation UC2845ADM Datasheet HTML 3Page - Microsemi Corporation UC2845ADM Datasheet HTML 4Page - Microsemi Corporation UC2845ADM Datasheet HTML 5Page - Microsemi Corporation UC2845ADM Datasheet HTML 6Page - Microsemi Corporation UC2845ADM Datasheet HTML 7Page - Microsemi Corporation UC2845ADM Datasheet HTML 8Page - Microsemi Corporation  
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C URRENT M ODE PWM C ONTROLLER
UC184xA/284xA/384xA
PRODUCT DA T ABOOK 1996/1997
5
Copyright © 1995
Rev. 1.2
12/95
P RODUCTION D AT A S HEET
CHARACTERISTIC CUR VES
FIGURE 1. — OSCILLATOR FREQUENCY vs. TIMING
RESISTOR
300
3.0k
100k
0
100k
R
T - (ohms)
10k
1M
1.0k
10.0k
30.0k
C
T = 1nF
C
T = 2.2nF
C
T = 4.7nF
FIGURE 2. — MAXIMUM DUTY CYCLE vs. TIMING RESISTOR
300
3.0k
100k
0
40.0
R
T - (ohms)
20.0
60.0
1.0k
10.0k
30.0k
80.0
100.0
Note: Output drive frequency is half the oscillator frequency for
the UCx844A/5A devices.
8
4
5
V
REF
R
T/CT
GROUND
R
T
C
T
For R
T > 5k, f »
1.72
R
T CT


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