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SIP12506 Datasheet(PDF) 5 Page - Vishay Siliconix

Part # SIP12506
Description  1-MHz Boost Converter with OVP for White LED Applications
PDF  11 Pages
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Manufacturer  VISHAY [Vishay Siliconix]
Direct Link  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

SIP12506 Datasheet(HTML) 5 Page - Vishay Siliconix

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Document Number: 73861
S-70547–Rev. D, 26-Mar-07
www.vishay.com
5
Vishay Siliconix
SiP12506
TYPICAL WAVEFORMS
Efficiency vs. LED Current - Driving 3 Series LEDs
Steady State Condition
VIN = 3.6 V, 4 series LEDs, ILOAD = 20 mA
Start-Up under Open-Load Condition
VIN = 3.6 V, open load
50
55
60
65
70
75
80
85
90
95
25
8
11
14
17
20
LED current (mA)
V
= 4.2 V
IN
V
= 3.6 V
IN
V
= 3.2 V
IN
400 nS/div
VOUT, 20 mV/div (AC Coupled)
VIN, 20 mV/div (AC Coupled)
VLX, 10 V/div
Inductor Current, 100 mA/div
200 µS/div
VLX, 20 V/div
VOUT, 5 V/div (AC Coupled)
Inductor Current, 500 mA/div
VEN, 5 V/div
Efficiency vs. LED Current - Driving 4 Series LEDs
Start-Up
VIN = 3.6 V, 4 series LEDs, ILOAD = 20 mA
50
55
60
65
70
75
80
85
90
95
258
11
14
17
20
LED current (mA)
V
= 3.2 V
IN
V
= 3.6 V
IN
V
= 4.2 V
IN
VOUT, 5 V/div (AC Coupled)
VEN, 5 V/div
Inductor Current, 500 mA/div
VLX, 10 V/div
100 µS/div



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