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參數資料
| 型號： | LP3943ISQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅動器 |
| 英文描述： | RGB/White/Blue 16-LED Fun Light Driver |
| 中文描述： | LED DISPLAY DRIVER, QCC24 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 264K |
| 代理商： | LP3943ISQ |
LP3943
RGB/White/Blue 16-LED Fun Light Driver
General Description
LP3943 is an integrated device capable of independently
driving 16 LEDs. This device also contains an internal pre-
cision oscillator that provides all the necessary timing re-
quired for driving each LED. Two prescaler registers along
with two PWM registers provide a versatile duty cycle con-
trol. The LP3943 contains the ability to dim LEDs in SMBUS/
I
2
C applications where it is required to cut down on bus
traffic.
Traditionally, to dim LEDs using a serial shift register such as
74LS594/5 would require a large amount of traffic to be on
the serial bus. 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 ON, OFF, or to cycle a pro-
grammed 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.
Features
n
Internal power-on reset
n
Active low reset
n
Internal precision oscillator
n
Variable dim rates (from 6.25 ms to 1.6s;
160 Hz–0.625 Hz)
Key Specifications
n
16 LED driver (multiple programmable states—on, off,
input, and dimming at a specified rate)
n
16 Open drain outputs capable of driving up to 25 mA
per LED
Applications
n
Customized flashing LED lights for cellular phones
n
Portable Applications
n
Digital Cameras
n
Indicator Lamps
n
General purpose I/O expander
n
Toys
Typical Application Circuit
20079601
November 2003
L
2003 National Semiconductor Corporation
DS200796
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LP3943ISQ/NOPB | 功能描述:LED照明驅動器 Funlight Led Driver 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 |
| LP3943ISQEV | 功能描述:電源管理IC開發工具 LP3943 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP3943ISQEV/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Board For LED Driver 16 Segment 2.5V/3.3V/5V T/R |
| LP3943ISQX | 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 |
| LP3943ISQX/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 |
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