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UC1825ALP883B 데이터시트(PDF) 6 Page - Texas Instruments

부품명 UC1825ALP883B
상세설명  High Speed PWM Controller
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
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UC1825ALP883B 데이터시트(HTML) 6 Page - Texas Instruments

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UC1823A,UC2823A, UC2823B,
UC3823A,UC3823B,UC1825A,
UC2825A,UC2825B,UC3825A,UC3825B
SLUS334C − AUGUST 1995 − REVISED AUGUST 2004
www.ti.com
6
APPLICATION INFORMATION
The oscillator of the UC3823A, UC3823B, UC3825A, and UC3825B is a saw tooth. The rising edge is governed by a current
controlled by the RT pin and value of capacitance at the CT pin (CCT). The falling edge of the sawtooth sets dead time for
the outputs. Selection of RT should be done first, based on desired maximum duty cycle. CT can then be chosen based
on the desired frequency (RT) and DMAX. The design equations are:
R
T +
3V
(10 mA)
1
* D
MAX
C
T +
1.6
D
MAX
R
T
f
Recommended values for RT range from 1 kΩ to 100 kΩ. Control of DMAX less than 70% is not recommended.
UDG−95102
Figure 1. Oscillator
10 M
1 M
100 k
10 k
1 k
10 k
100 k
Figure 2
RT − Timing Resistance − W
OSCILLATOR FREQUENCY
vs
TIMING RESISTANCE
Figure 3
1 k
10 k
70
75
80
85
90
95
100
100 k
RT − Timing Resistance − W
MAXIMUM DUTY CYCLE
vs
TIMING RESISTANCE
(1)


유사한 부품 번호 - UC1825ALP883B

제조업체부품명데이터시트상세설명
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UC1825ALP883B TI-UC1825ALP883B Datasheet
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유사한 설명 - UC1825ALP883B

제조업체부품명데이터시트상세설명
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