LP3943
- Internal Power-On Reset
- Active Low Reset
- Internal Precision Oscillator
- Variable Dim Rates
(From 6.25 ms to 1.6 s; 160 Hz to 0.625 Hz) - 16 LED Drivers (Multiple Programmable States: ON, OFF, Input, and Dimming at a Specified Rate)
- 16 Open-Drain Outputs Capable of Driving up to 25 mA 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 25 mA per pin and 200 mA per package. Any ports not used for controlling the LEDs can be used for general purpose input/output expansion.
For all available packages, see the orderable addendum at the end of the data sheet.技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LP3943 16-Channel RGB, White-LED Driver With Independent SMBUS/I2C String Control datasheet (Rev. D) | PDF | HTML | 2016年 11月 4日 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
| Application note | How to Select a RGB LED Driver | 2019年 8月 8日 | ||
| User guide | AN-1300 LP3943 Evaluation Kit (Rev. B) | 2013年 4月 30日 | ||
| Application note | AN-1715 LP3943/LP3944 as a GPIO Expander (Rev. A) | 2013年 4月 30日 |
設計與開發
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The BOOSTXL-CAPKEYPAD is an easy-to-use evaluation module (EVM) for the MSP430FR2522 capacitive touch sensing microcontroller (MCU) with CapTIvate™ technology. The BOOSTXL-CAPKEYPAD can be used in three different ways - with a LaunchPad™ development kit, with the CapTIvate (...)
LP3943SW-LINUX — 適用於 LP3943 的 Linux 驅動程式
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lp3943
Linux Source (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 引腳 | 下載 |
|---|---|---|
| WQFN (RTW) | 24 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點
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。