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LP8551TLX/NOPB Datasheet(PDF) 25 Page - Texas Instruments

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Part # LP8551TLX/NOPB
Description  LP8551 High-Efficiency LED Backlight Driver for Notebooks
PDF  47 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP8551TLX/NOPB Datasheet(HTML) 25 Page - Texas Instruments

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LP8551
www.ti.com
SNVS673E – APRIL 2010 – REVISED SEPTEMBER 2014
8.6 Register Map
ADDR
REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
DEFAULT
00H
Brightness Control
BRT[7:0]
0000 0000
01H
Device Control
BRT_MODE[1:0]
BL_CTL
0000 0000
02H
Fault
OPEN
SHORT
2_CHANNELS
1_CHANNEL
BL_FAULT
OCP
TSD
UVLO
0000 0000
03H
ID
PANEL
MFG[3:0]
REV[2:0]
1111 1100
04H
Direct Control
OUT[4:1]
0000 0000
05H
Temp MSB
TEMP[10:3]
0000 0000
06H
Temp LSB
TEMP[2:0]
0000 0000
72H
EEPROM_control
EE_READY
EE_INIT
EE_PROG
EE_READ
0000 0000
8.6.1 Register Bit Explanations
8.6.1.1 Brightness Control
Address 00h
Reset value 0000 0000b
BRIGHTNESS CONTROL REGISTER
7
6
5
4
3
2
1
0
BRT[7:0]
Name
Bit
Access
Description
BRT
7:0
R/W
Backlight PWM 8-bit linear control.
8.6.1.2 Device Control
Address 01h
Reset value 0000 0000b
DEVICE CONTROL REGISTER
7
6
5
4
3
2
1
0
BRT_MODE[1:0]
BL_CTL
Name
Bit
Access
Description
BRT_MODE
2:1
R/W
PWM source mode
00b = PWM input pin duty cycle control (default)
01b = PWM input pin duty cycle control
10b = Brightness register
11b = Direct PWM control from PWM input pin
BL_CTL
0
R/W
Enable backlight
0 = Backlight disabled and chip turned off if BRT_MODE[1:0] = 10. In external PWM
pin control the state of the chip is defined with the PWM pin, and this bit has no
effect.
1 = Backlight enabled and chip turned on if BRT_MODE[1:0] = 10. In external PWM
pin control the state of the chip is defined with the PWM pin, and this bit has no
effect.
Copyright © 2010–2014, Texas Instruments Incorporated
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