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LP8545 데이터시트(PDF) 33 Page - Texas Instruments

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부품명 LP8545
상세설명  High-Efficiency LED Backlight Driver for Notebooks
PDF  44 Pages
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제조업체  TI1 [Texas Instruments]
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LP8545 데이터시트(HTML) 33 Page - Texas Instruments

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LP8545
www.ti.com
SNVS635D – APRIL 2010 – REVISED DECEMBER 2013
EEPROM Bit Explanations
EEPROM Default Values
ADDR
LP8545SQX
A0H
0111 1111
A1H
1011 0101
A2H
1010 1111
A3H
0111 1011
A4H
0010 1000
A5H
1100 1111
A6H
0110 0100
A7H
0010 1101
EEPROM Address 0
Address A0h
EEPROM ADDRESS 0 register
7
6
5
4
3
2
1
0
CURRENT[7:0]
Name
Bit
Access
Description
CURRENT
7:0
R/W
Backlight current adjustment. If EN_I_RES = 0 the maximum backlight current is
defined only with these bits as described below. If EN_I_RES = 1, then the external
resistor connected to ISET pin also scales the LED current. With 16 k
Ω resistor and
CURRENT set to 7FH the output current is then 23 mA.
EN_I_RES = 0
EN_I_RES = 1
0000 0000
0 mA
0 mA
0000 0001
0.12 mA
(1/255) x 600 x 1.23V/RISET
0000 0010
0.24 mA
(2/255) x 600 x 1.23V/RISET
...
...
...
0111 1111 (default)
15.00 mA
(127/255) x 600 x 1.23V/RISET
...
...
...
1111 1101
29.76 mA
(253/255) x 600 x 1.23V/RISET
1111 1110
29.88 mA
(254/255) x 600 x 1.23V/RISET
1111 1111
30.00 mA
(255/255) x 600 x 1.23V/RISET
EEPROM Address 1
Address A1h
EEPROM ADDRESS 1 register
7
6
5
4
3
2
1
0
BOOST_FREQ[1:0]
EN_LED_FAULT
TEMP_LIM[1:0]
SLOPE[2:0]
Name
Bit
Access
Description
BOOST_FREQ
7:6
R/W
Boost Converter Switch Frequency
00 = 156 kHz
01 = 312 kHz
10 = 625 kHz
11 = 1250 kHz
EN_LED_FAULT
5
R/W
Enable LED fault detection
0 = LED fault detection disabled
1 = LED fault detection enabled
Copyright © 2010–2013, Texas Instruments Incorporated
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