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LR745 데이터 시트보기 (PDF) - Microchip Technology
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LR745
High-Input Voltage SMPS Start-up
Microchip Technology
LR745 Datasheet PDF : 15 Pages
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LR745
FIGURE 3-2:
START-UP WAVEFORMS
16.0
V
OUT
13.5
(V)
12.0
Stage
I
8.0
4.0
0.0
3.0
I
IN
(mA)
2.0
1.0
0.0
12.0
Stage
II
Stage
III
PWM IC Start Threshold Voltage
LR7 V
OFF
Trip Point
Auxiliary Supply Powers PWM IC
t
I
IN
≈ 0mA
t
V
AUX
8.0
(V)
4.0
0.0
30.0
I
AUX
(mA)
20.0
10.0
0.0
V
AUX
= 12V
t
I = 20mA
AUX
t
DS20005394A-page 6
2015 Microchip Technology Inc.
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