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UC28025NG4 Arkusz danych(PDF) 10 Page - Texas Instruments

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Numer części UC28025NG4
Szczegółowy opis  ECONOMY HIGH-SPEED PWM CONTROLLER
Download  19 Pages
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

UC28025NG4 Arkusz danych(HTML) 10 Page - Texas Instruments

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UC28023
UC28025
SLUS557F -- MARCH 2003 -- REVISED AUGUST 2010
10
www.ti.com
APPLICATION INFORMATION
Figure 3. Open Loop Frequency Response
100
0
--40
1k
10 k
100 k
1 M
10 M
100 M
--20
60
20
40
80
100
--180
--90
0
GAIN AND PHASE
vs
FREQUENCY
fOSC -- Frequency -- Hz
GAIN
PHASE
3
2
5
4
1
0
0.2
0.4
0.6
0.8
1.0
tdelay -- Delay Time-- μs
Figure 4. Unity Gain Slew Rate
VOLTAGE
vs
TIME
VOUT
VIN
CONTROL METHODS
6
7
CT
UC2802x
OSCILLATOR
1.25 V
RAMP
From
Error Amplifier
Figure 5. Voltage Mode Control
UDG--03050
CT
Figure 6. Peak Current Mode Control
RSENSE
UDG--03050
CT
* A small filter may be required to supress switch noise.
6
7
CT
UC2802x
OSCILLATOR
1.25 V
RAMP
From
Error Amplifier
*
*
ISENSE


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