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| LP8551_14 Datasheet, PDF (33/47 Pages) Texas Instruments – LP8551 High-Efficiency LED Backlight Driver for Notebooks | |||
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8.6.2.7 EEPROM Address 5
Address A5h
EEPROM ADDRESS 5 REGISTER
7
6
Name
Bit
VBOOST
4:0
5
Access
R/W
LP8551
SNVS673E â APRIL 2010 â REVISED SEPTEMBER 2014
4
3
2
1
0
VBOOST[4:0]
Description
Boost voltage control from 10V to 40V with 1V step. If adaptive boost control is
enabled, this sets the initial start voltage for the boost converter. If adaptive mode
is disabled, this directly sets the output voltage of the boost converter.
0 0000 = 10V
0 0001 = 11V
0 0010 = 12V
...
1 1101 = 39V
1 1110 = 40V
1 1111 = 40V
8.6.2.8 EEPROM Address 7
Address A7h
EEPROM ADDRESS 7 REGISTER
7
6
5
Name
Bit
EN_F_RES
2
Access
R/W
HYSTERESIS
1:0
R/W
4
3
2
1
0
EN_F_RES
HYSTERESIS[1:0]
Description
Enable PWM output frequency set resistor
0 = Resistor is disabled and PWM output frequency is set with PWM_FREQ EEPROM
register bits
1 = PWM frequency set resistor is enabled. RFSET defines the output PWM frequency. See
PWM Frequency Setting for full description of the PWM frequencies.
PWM input hysteresis function. Defines how small changes in the PWM input are ignored to
remove constant switching between two values.
00 = OFF
01 = 1-bit hysteresis with 11-bit resolution
10 = 1-bit hysteresis with 10-bit resolution
11 = 1-bit hysteresis with 8-bit resolution
Copyright © 2010â2014, Texas Instruments Incorporated
Product Folder Links: LP8551
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