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參數(shù)資料
| 型號： | LP3958TL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | Lighting Management Unit with High Voltage Boost Converter |
| 中文描述： | LED DISPLAY DRIVER, PBGA25 |
| 封裝： | 2.54 X 2.54 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, MICRO SMD PACKAGE-25 |
| 文件頁數(shù)： | 7/28頁 |
| 文件大?。?/td> | 1091K |
| 代理商： | LP3958TL |
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Modes of Operation
RESET:
In the RESET mode all the internal registers are reset to the default values. Reset is entered always if input
NRST is LOW or internal Power On Reset is active. Power On Reset (POR) will activate during the chip
startup or when the supply voltages V
DD1
and V
DD2
fall below 1.5V. Once V
DD1
and V
DD2
rises above 1.5V,
POR will inactivate and the chip will continue to the STANDBY mode. NSTBY control bit is low after POR
by default.
The STANDBY mode is entered if the register bit NSTBY is LOW and Reset is not active. This is the low
power consumption mode, when all circuit functions are disabled. Registers can be written in this mode and
the control bits are effective immediately after start up.
When NSTBY bit is written high, the INTERNAL STARTUP SEQUENCE powers up all the needed internal
blocks (V
, Bias, Oscillator etc.). To ensure the correct oscillator initialization, a 10ms delay is generated
by the internal state-machine. If the chip temperature rises too high, the Thermal Shutdown (THSD)
disables the chip operation and STARTUP mode is entered until no thermal shutdown event is present.
BOOST STARTUP:
Soft start for boost output is generated in the BOOST STARTUP mode. The boost output is raised in low
current PWM mode during the 20ms delay generated by the state-machine. All LED outputs are off during
the 20ms delay to ensure smooth startup. The Boost startup is entered from Internal Startup Sequence if
EN_BOOST is HIGH or from Normal mode when EN_BOOST is written HIGH.
NORMAL:
During NORMAL mode the user controls the chip using the Control Registers. The registers can be written
in any sequence and any number of bits can be altered in a register in one write.
STANDBY:
STARTUP:
20175575
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3958TL/NOPB | 功能描述:LED照明驅(qū)動器 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 |
| LP3958TLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Lighting Management Unit with High Voltage Boost Converter |
| LP3958TLX/NOPB | 功能描述:LED照明驅(qū)動器 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 |
| LP395Z | 功能描述:兩極晶體管 - BJT RoHS:否 制造商:STMicroelectronics 配置: 晶體管極性:PNP 集電極—基極電壓 VCBO: 集電極—發(fā)射極最大電壓 VCEO:- 40 V 發(fā)射極 - 基極電壓 VEBO:- 6 V 集電極—射極飽和電壓: 最大直流電集電極電流: 增益帶寬產(chǎn)品fT: 直流集電極/Base Gain hfe Min:100 A 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PowerFLAT 2 x 2 |
| LP395Z | 制造商:Texas Instruments 功能描述:POWER TRANSISTOR TO-92-3 395 |
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