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LP8556 데이터시트(PDF) 37 Page - Texas Instruments

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부품명 LP8556
상세설명  High-Efficiency LED Backlight Driver for Tablets
PDF  63 Pages
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

LP8556 데이터시트(HTML) 37 Page - Texas Instruments

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LP8556
www.ti.com
SNVS871I – JULY 2012 – REVISED MARCH 2016
Product Folder Links: LP8556
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
8.6.2.3 LP8556SQ (WQFN) Configurations and Pre-configured EPROM Settings
ADDRESS
LP8556-E00
LP8556-E08
LP8556-E09
98h[7]
1b
1b
1b
9Eh
22h
22h
22h
A0h
FFh
FFh
FFh
A1h
CFh
CFh
CFh
A2h
2Fh
2Fh
2Fh
A3h
5Eh
5Eh
02h
A4h
72h
72h
72h
A5h
14h
24h
04h
A6h
80h
80h
80h
A7h
F6h
F6h
F6h
A9h
A0h
A0h
A0h
AAh
0Fh
0Fh
0Fh
ABh
00h
00h
00h
ACh
00h
00h
00h
ADh
00h
00h
00h
AEh
0Fh
0Fh
0Fh
AFh
01h
01h
01h
(1)
1.8 A is the maximum ISW_LIM supported with the DSBGA package. For applications requiring the ISW_LIM to be greater than 1.8 A and
up to 2.6 A, WQFN package should be considered.
8.6.2.4 CFG98
Address 98h
CFG98 REGISTER
7
6
5
4
3
2
1
0
IBOOST_LIM_2X
NAME
BIT
ACCESS
DESCRIPTION
IBOOST_LIM_2X
7
R/W
Select the inductor current limit range.
When IBOOST_LIM_2X = 0, the inductor current limit can be set to 0.9 A, 1.2 A, 1.5 A or 1.8
A.
When IBOOST_LIM_2X = 1, the inductor current limit can be set to 1.6 A, 2.1 A, or 2.6 A .
This option is supported only on WQFN package and not on DSBGA package. See (1).
8.6.2.5 CFG9E
Address 9Eh
CFG9E REGISTER
7
6
5
4
3
2
1
0
VBOOST_RANGE
HEADROOM_OFFSET
NAME
BIT
ACCESS
DESCRIPTION
VBOOST_RANGE
5
R/W
Select VBOOST range.
When VBOOST_RANGE = 0, the output voltage range is from 7 V to 34 V
When VBOOST_RANGE = 1, the output voltage range is from 16 V to 43 V
HEADROOM_
OFFSET
3:0
R/W
LED driver headroom offset. This adjusts the LOW comparator threshold together
with LED_HEADROOM bits and contributes to the MID comparator threshold.
0000 = 460 mV
0001 = 390 mV
0010 = 320 mV
0100 = 250 mV
1000 = 180 mV



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