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LP8556 数据表(PDF) 34 Page - Texas Instruments

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部件名 LP8556
功能描述  High-Efficiency LED Backlight Driver for Tablets
PDF  63 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LP8556 数据表(HTML) 34 Page - Texas Instruments

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34
LP8556
SNVS871I – JULY 2012 – REVISED MARCH 2016
www.ti.com
Product Folder Links: LP8556
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
8.6.1.3 Status
Address 02h
Reset value 0000 0000b
FAULT REGISTER
7
6
5
4
3
2
1
0
OPEN
SHORT
VREF_OK
VBOOST_OK
OVP
OCP
TSD
UVLO
NAME
BIT
ACCESS
DESCRIPTION
OPEN
7
R
LED open fault detection
0 = No fault
1 = LED open fault detected. The value is not latched.
SHORT
6
R
LED short fault detection
0 = No fault
1 = LED short fault detected. The value is not latched.
VREF_OK
5
R
Internal VREF node monitor status
1 = VREF voltage is OK.
VBOOST_OK
4
R
Boost output voltage monitor status
0 = Boost output voltage has not reached its target (VBOOST < Vtarget – 2.5V)
1 = Boost output voltage is OK. The value is not latched.
OVP
3
R
Overvoltage protection
0 = No fault
1 = Overvoltage condition occurred. Fault is cleared by reading the register 02h.
OCP
2
R
Over current protection
0 = No fault
1 = Overcurrent condition occurred. Fault bit is cleared by reading this register.
TSD
1
R
Thermal shutdown
0 = No fault
1 = Thermal fault generated, 150°C reached. Boost converter and LED outputs are
disabled until the temperature has dropped down to 130°C. Fault is cleared by reading
this register.
UVLO
0
R
Undervoltage detection
0 = No fault
1 = Undervoltage detected on the VDD pin. Boost converter and LED outputs are
disabled until VDD voltage is above the UVLO threshold voltage. Threshold voltage is
set with EPROM bits. Fault is cleared by reading this register.



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