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SC668 Datasheet(PDF) 7 Page - Semtech Corporation

Part # SC668
Description  8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM Dimming, and 4 LDOs
PDF  46 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC668 Datasheet(HTML) 7 Page - Semtech Corporation

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SC668
7
Typical Characteristics — Backlights
Backlight Efficiency (8 LEDs)
50
60
70
80
90
100
2.7
3.0
3.3
3.6
3.9
4.2
η = (∑PLED1-8)/(VIN × IIN + VA × IA), IOUT = 8 × IBL, VA = VIN, TA = 25°C
VIN (V)
IBL = 25mA
IBL = 12mA
IBL = 5mA
IBL = 1mA
IBL = 0.5mA
VF = 3.24V
VF = 3.10V
VF = 2.97V
VF = 2.80V
VF = 2.74V
I
IN Supply Current (8 LEDs)
1.0
1.1
1.2
1.3
1.4
1.5
2.7
3.0
3.3
3.6
3.9
4.2
IOUT = 8 × IBL, VA = VIN, TA = 25°C
VIN (V)
IBL = 25 mA, VF = 3.24V
IBL = 12 mA, VF = 3.10V
IBL = 5 mA, VF = 2.97V
IBL = 1 mA, VF = 2.80V
IBL = 0.5 mA, VF = 2.74V
Dropout Voltage V
DO vs IBL (6 LEDs)
IBLSetting (mA)
VDO = VBLn when IBLn has dropped 10% from the target value
TA=85°C
TA=-40°C
10
20
30
40
50
60
70
80
0
5
10
15
20
25
TA=25°C



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