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參數(shù)資料
| 型號(hào)： | LP3954 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Advanced Lighting Management Unit |
| 中文描述： | 高級(jí)照明管理單位 |
| 文件頁(yè)數(shù)： | 25/56頁(yè) |
| 文件大小： | 5801K |
| 代理商： | LP3954 |
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Backlight Drivers
LP3954 has 2 independent backlight drivers. Both drivers are
regulated constant current sinks. LED current for both LED
banks (WLED1…4 and WLED5…6) are controlled by 8-bit
current mode DACs with 0.1 mA step.
WLED1…4 and WLED5…6 can be also controlled with one
DAC for better matching allowing the use of larger displays
having up to 6 white LEDs in parallel.
Display configuration is controlled with DISPL bit as shown
below.
DISPL
Configuration
Main display up
to 4 LEDs
Sub display up
to 2 LEDs
Large display
up to 6 LEDs
Matching
Good btw
WLED1…4
Good btw
WLED5…6
Good btw
WLED 1…6
0
1
Display backlight enables
EN_W1-4
1
0
1
0
WLED1-4 enabled
WLED1-4 disabled
WLED5-6 enabled
WLED5-6 disabled
EN_W5-6
20132235
Main display up to 4 LEDs (WLED1…4)
Sub display driver up to 2 LEDs (WLED5…6)
20132237
Main display up to 6 LEDs (WLED1…6) (DISPL=1)
BACKLIGHT DRIVER ELECTRICAL CHARACTERISTICS
Symbol
I
MAX
I
Leakage
I
WLED1
Parameter
Conditions
Min
21.3
Typical
25.5
Max
29.4
1
14.78
+16
Units
mA
Maximum Sink Current
Leakage Current
V
FB
=5V
I
WLED1
set to 12.8mA (80H)
0.03
μA
WLED1 Current tolerance
10.52
-18
12.8
0.2
mA
%
%
I
Match1-4
I
Match5-6
I
Match1-6
Sink Current Matching
I
SINK
=13mA, Between WLED1…4
I
SINK
=13mA, Between WLED5…6
I
SINK
=13mA, Between WLED1…6
Sink Current Matching
0.2
%
Sink Current Matching
0.3
%
Note:
Matching is the maximum difference from the average.
25
www.national.com
L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP3954RL | Advanced Lighting Management Unit |
| LP3954RLX | Advanced Lighting Management Unit |
| LP3954TL | Advanced Lighting Management Unit |
| LP3954TLX | Advanced Lighting Management Unit |
| LP3958 | Lighting Management Unit with High Voltage Boost Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP39542 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Advanced Lighting Management Unit |
| LP39542RL | 制造商:Texas Instruments 功能描述:IC, LIGHTING MGNT UNIT, SMD |
| LP39542RL/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP39542RLX | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Advanced Lighting Management Unit |
| LP39542RLX/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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