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LP8555 Datasheet(PDF) 8 Page - Texas Instruments

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Part # LP8555
Description  LP8555 High-Efficiency LED Backlight Driver for Tablet PCs
PDF  64 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP8555 Datasheet(HTML) 8 Page - Texas Instruments

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70
75
80
85
90
95
0
50
100
150
200
250
300
Total Load (mA)
VIN = 3.0 V
VIN = 3.7 V
VIN = 4.2 V
VIN = 5.4 V
VIN = 7.4 V
VIN = 8.4 V
C005
Inductor: IHLP2525CZER6R8M01
70
75
80
85
90
95
0
20
40
60
80
100
Brightness (%)
VIN = 3.0 V
VIN = 3.7 V
VIN = 4.2 V
VIN = 5.4 V
VIN = 7.4 V
VIN = 8.4 V
C006
Inductor: IHLP2525CZER6R8M01
70
75
80
85
90
95
0
50
100
150
200
250
300
Total Load (mA)
VIN = 3.0 V
VIN = 3.7 V
VIN = 4.2 V
VIN = 5.4 V
VIN = 7.4 V
VIN = 8.4 V
C003
Inductor: IHLP2525CZER6R8M01
70
75
80
85
90
95
0
20
40
60
80
100
Brightness (%)
VIN = 3.0 V
VIN = 3.7 V
VIN = 4.2 V
VIN = 5.4 V
VIN = 7.4 V
VIN = 8.4 V
C004
Inductor: IHLP2525CZER6R8M01
80
82
84
86
88
90
92
94
0
50
100
150
200
250
300
Total Load (mA)
VIN = 3.0 V
VIN = 3.7 V
VIN = 4.2 V
VIN = 5.4 V
VIN = 7.4 V
VIN = 8.4 V
C001
Inductor: IHLP2525CZER6R8M01
80
82
84
86
88
90
92
0
20
40
60
80
100
Brightness (%)
VIN = 3.0 V
VIN = 3.7 V
VIN = 4.2 V
VIN = 5.4 V
VIN = 7.4 V
VIN = 8.4 V
C002
Inductor: IHLP2525CZER6R8M01
LP8555
SNVS857 – FEBRUARY 2014
www.ti.com
7.7 Typical Characteristics
Measured at room temperature unless otherwise noted. Maximum LED current set to 23 mA per string. DC-DC Efficiency is
defined as POUT/PIN, where POUT is total output power measured from boost output(s). LED Drive Efficiency is defined as
PLED/PIN , where PLED is actual power consumed in LEDs.
L = 6.8 µH
12 x 6 LEDs
+25°C
L = 6.8 µH
12 x 6 LEDs
+25°C
Figure 2. Boost Efficiency
Figure 3. LED Drive Efficiency
L = 6.8 µH
12 x 7 LEDs
+25°C
L = 6.8 µH
12 x 7 LEDs
+25°C
Figure 4. Boost Efficiency
Figure 5. LED Drive Efficiency
L = 6.8 µH
12 x 7 LEDs
-40°C
L = 6.8 µH
12 x 7 LEDs
-40°C
Figure 6. Boost Efficiency
Figure 7. LED Drive Efficiency
8
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Product Folder Links: LP8555



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