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LP8550TLX/NOPB 数据表(PDF) 8 Page - Texas Instruments

部件名 LP8550TLX/NOPB
功能描述  LP8550 High-Efficiency LED Backlight Driver for Notebooks
PDF  49 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

LP8550TLX/NOPB 数据表(HTML) 8 Page - Texas Instruments

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LP8550
SNVS657E – SEPTEMBER 2010 – REVISED SEPTEMBER 2014
www.ti.com
7.9
Undervoltage Protection
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
UVLO[1:0] = 00
Disabled
UVLO[1:0] = 01, falling
2.55
2.70
2.94
UVLO[1:0] = 01, rising
2.62
2.76
3.00
VUVLO
VIN UVLO threshold voltage
UVLO[1:0] = 10, falling
5.11
5.40
5.68
V
UVLO[1:0] = 10, rising
5.38
5.70
5.98
UVLO[1:0] = 11, falling
7.75
8.10
8.45
UVLO[1:0] = 11, rising
8.36
8.73
9.20
7.10
Logic Interface Characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LOGIC INPUT EN
VIL
Input low level
0.4(1)
V
VIH
Input high level
1.2(1)
V
II
Input current
-1(1)
1(1)
μA
LOGIC INPUT VSYNC
VIL
Input low level
0.4(1)
V
VIH
Input high level
2.2(1)
V
II
Input current
–1(1)
1(1)
μA
fVSYNC
Frequency range
58
60
55000
Hz
LOGIC INPUT PWM
VIL
Input low level
0.4(1)
V
VIH
Input high level
2.2(1)
V
II
Input current
–1(1)
1(1)
μA
LOGIC INPUTS SCL, SDA
VIL
Input low level
0.2xVDDIO
(1)
V
VIH
Input high level
0.8xVDDIO
(1)
V
II
Input current
–1(1)
1(1)
μA
LOGIC OUTPUTS SDA, FAULT
VOL
Output low level
IOUT = 3 mA (pull-up current)
0.3
0.5(1)
V
IL
Output leakage current
VOUT = 2.8 V
–1(1)
1(1)
μA
(1)
Limits apply over the full operating ambient temperature range (–30°C
≤ TA ≤ 85°C).
7.11
I
2C Serial Bus Timing Parameters (SDA, SCLK) (1)
MIN
MAX
UNIT
fCLK
Clock frequency
400
kHz
1
Hold time (repeated) START condition
0.6
μs
2
Clock low time
1.3
μs
3
Clock high time
600
ns
4
Setup time for a repeated START condition
600
ns
5
Data hold time
50
ns
6
Data setup time
100
ns
7
Rise time of SDA and SCL
20+0.1Cb
300
ns
8
Fall time of SDA and SCL
15+0.1Cb
300
ns
9
Setup time for STOP condition
600
ns
10
Bus free time between a STOP and a START condition
1.3
μs
(1)
Specified by design. Not production tested. VDDIO = 1.65 V to 5.5 V.
8
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Copyright © 2010–2014, Texas Instruments Incorporated
Product Folder Links: LP8550



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