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UC28023DW Datasheet(PDF) 10 Page - Texas Instruments

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No. de pieza UC28023DW
Descripción Electrónicos  ECONOMY HIGH-SPEED PWM CONTROLLER
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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UC28023DW Datasheet(HTML) 10 Page - Texas Instruments

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UC28023
UC28025
SLUS557B − MARCH 2003 − REVISED APRIL 2004
10
www.ti.com
APPLICATION INFORMATION
OSCILLATOR
Figure 7. Oscillator Circuit
UDG−03052
6
4
CT
UC2802x
CLOCK
3 V
5
RT
Blanking
5.1 V
IR
IC = IR
TD
400
µA
Figure 8.
0.047
0.22
0.047
1.0
2.2
4.7
10.0
22.0
47
0.10
2.20
0.47
1.00
4.70
10.0
100
CT − Timing Capacitance − nF
DEAD TIME
vs
TIMING CAPACITANCE
3 k
Ω ≤ RT ≤ 100 kΩ
Figure 9. Oscillator Circuit
10 k
1 k
100 k
1 k
10 k
100 k
1 M
100
10 nF
22 nF
47 nF
100 nF
fOSC − Frequency − Hz
470 pF
1 nF
2.2 nF
4.7 nF
TIMING RESISTANCE
vs
FREQUENCY
Figure 10.
DEAD TIME
vs
FREQUENCY
160
140
120
100
80
10 k
100 k
1 M
RT = 1 nF
fOSC − Frequency − Hz
RT = 470 pF


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