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參數資料
| 型號： | LP55281 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Quad RGB Driver |
| 中文描述： | 四RGB驅動器 |
| 文件頁數： | 8/28頁 |
| 文件大?。?/td> | 1313K |
| 代理商： | LP55281 |
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Modes of Operation
RESET:
In the RESET mode all the internal registers are reset to the default values and the device goes to STANDBY
mode after reset. NSTBY control bit is low after reset by default. Reset is entered always if Reset Register
is written, internal Power On Reset is active, or NRST pin is pulled down externally. The LP55281 can be
reset by writing any data to the Reset Register (address 60H). Power On Reset (POR) will activate during
the device startup or when the supply voltage V
falls below 1.5V. Once V
DD2
rises above 1.5V, POR will
inactivate and the device will continue to the STANDBY mode.
The STANDBY mode is entered if the register bit NSTBY is LOW. 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 startup.
When NSTBY bit is written high, the INTERNAL STARTUP SEQUENCE powers up all the needed internal
blocks (VREF, Oscillator, etc.). To ensure the correct oscillator initialization, a 10 ms delay is generated by
the internal state-machine. If the device temperature rises too high, the Thermal Shutdown (TSD) disables
the device operation and STARTUP mode is entered until no thermal shutdown is present.
BOOST STARTUP:
Soft start for boost output is generated in the BOOST STARTUP mode. The boost output is raised in PWM
mode during the 10 ms delay generated by the state-machine. The Boost startup is entered from Internal
Startup Sequence if EN_BOOST is HIGH or from Normal mode when EN_BOOST is written HIGH. During
the 10 ms Boost Startup time all LED outputs are switched off to ensure smooth startup.
NORMAL:
During NORMAL mode the user controls the device 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:
20201175
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相關PDF資料 |
PDF描述 |
|---|---|
| LP55281RL | Quad RGB Driver |
| LP55281RLX | Quad RGB Driver |
| LP55281TL | Quad RGB Driver |
| LP55281TLX | Quad RGB Driver |
| LP5551 | PowerWise⑩ Technology Compliant Energy Management Unit |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LP55281RL | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad RGB Driver |
| LP55281RL/NOPB | 功能描述:LED照明驅動器 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP55281RLEV | 功能描述:LED 照明開發(fā)工具 LP55281RLEV EVAL BOARD RoHS:否 制造商:Fairchild Semiconductor 產品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
| LP55281RLEV/NOPB | 制造商:Texas Instruments 功能描述:QUAD RGB DRIVER - Boxed Product (Development Kits) 制造商:Texas Instruments 功能描述:BOARD EVAL FOR LP5528 RGB DRIVER 制造商:Texas Instruments 功能描述:Quad RGB Drvr fr the PowerWise Family |
| LP55281RLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad RGB Driver |
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