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LP85571 데이터시트(PDF) 26 Page - Texas Instruments

부품명 LP85571
상세설명  LP8557 High-Efficiency LED Backlight Driver For Tablets
PDF  49 Pages
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제조업체  TI2 [Texas Instruments]
홈페이지  https://www.ti.com
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LP85571 데이터시트(HTML) 26 Page - Texas Instruments

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LP8557, LP85571
SNVSA15B – DECEMBER 2013 – REVISED DECEMBER 2015
www.ti.com
8.6.1.3 BRTLO
Address: 0x03h
Reset: 0x00h
D7
D6
D5
D4
D3
D2
D1
D0
BRT[3:0]
—
Bits
Field
Type
Default
Description
7:4
BRT[3:0]
R/W
0000b
Least significant bits of the 12-bit wide brightness level. If controlling the brightness
with 8-bit resolution, writing to this register is not needed.
6:0
reserved
R/O
0000b
Reserved.
8.6.1.4 BRTHI
Address: 0x04h
Reset: 0x00h
D7
D6
D5
D4
D3
D2
D1
D0
BRT[11:4]
Bits
Field
Type
Default
Description
7:0
BRT[11:4]
R/W
00h
Most significant bits of the 12-bit wide brightness level. If controlling the brightness
with the 8-bit resolution, writing to this register is all that is needed.
The brightness level can be updated via one (8 bits) or two (16 bits) register writes. The internal brightness level
is 12 bits wide and is only updated when the BRTHI register is written. If the BRTHI register is written without a
previous write to the BRTLO register, then the lower order bits of the internal brightness is synthesized from the
BRTHI register value.
BRTLO
BRTHI
Brightness
Comments
write 0x95
write 0xFC
0xFC9
BRTLO[3:0] is ignored
write 0x10
write 0xDC
0xDC1
set to an exact 12-bit value
no write
write 0x8C
0x8C8
synthesize low order bits
no write
write 0x0C
0x0C0
synthesize low order bits
no write
write 0x00
0x000
0% brightness
no write
write 0xFF
0xFFF
100% brightness
26
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Product Folder Links: LP8557 LP85571



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