LP3943
- Internal power-on reset
- Active low reset
- Internal precision oscillator
- Variable dim rates (from 6.25ms to 1.6s; 160Hz to 0.625Hz)
- 16 LED drivers (multiple programmable states: ON, OFF, input, and dimming at a specified rate)
- 16 open-drain outputs capable of driving up to 25mA per LED
The LP3943 is an integrated device capable of independently driving 16 LEDs. This device also contains an internal precision oscillator that provides all the necessary timing required for driving each LED. Two prescaler registers, along with two PWM registers, provide a versatile duty-cycle control. The LP3943 contains the ability to dim LEDs in SMBUS/I2C applications where it is required, to cut down on bus traffic.
Traditionally, dimming LEDs using a serial shift register such as 74LS594/5 requires a large amount of traffic on the serial bus. The LP3943 instead requires only the setup of the frequency and duty cycle for each output pin; from then on, only a single command from the host is required to turn each individual open drain output to an ON or OFF state, or to cycle a programmed frequency and duty cycle. Maximum output sink current is 25mA per pin and 200mA per package. Any ports not used for controlling the LEDs can be used for general purpose input/output expansion.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LP3943 16-Channel RGB, White-LED Driver with Independent SMBUS/I2 C String Control datasheet (Rev. E) | PDF | HTML | 2024/10/9 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 應用說明 | How to Select a RGB LED Driver | 2019/8/8 | ||||
| EVM User's guide | AN-1300 LP3943 Evaluation Kit (Rev. B) | 2013/4/30 | ||||
| 應用說明 | AN-1715 LP3943/LP3944 as a GPIO Expander (Rev. A) | 2013/4/30 |
設計與開發
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BOOSTXL-CAPKEYPAD 讓您透過新增具有 LED 背光和近距喚醒功能的 12 鍵電容式觸控數位鍵盤來擴展您的 LaunchPad™ 開發套件設計。沒有 (...)
LP3943SW-LINUX — 適用於 LP3943 的 Linux 驅動程式
The Linux driver supports the LP3943 16-LED Fun Light Driver. The Linux driver supports communication through the I2C bus and interfaces with the GPIO and PWM sub-systems.
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lp3943
Linux Source (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTW) | 24 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。