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LR745 Datasheet(PDF) 6 Page - Microchip Technology

Part # LR745
Description  High-Input Voltage SMPS Start-up
PDF  15 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LR745 Datasheet(HTML) 6 Page - Microchip Technology

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



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