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參數(shù)資料
| 型號(hào)： | LP3944 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | RGB/White/Blue 8-LED Fun Light Driver |
| 中文描述： | 的RGB /白/藍(lán)8的LED燈驅(qū)動(dòng)器樂 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 249K |
| 代理商： | LP3944 |
LP3944
RGB/White/Blue 8-LED Fun Light Driver
General Description
LP3944 is an integrated device capable of independently
driving 8 LEDs. This device also contains an internal preci-
sion 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
LP3944 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. LP3944 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
8 LED driver (multiple programmable states—on, off,
input, and dimming at a specified rate)
n
8 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
20085301
November 2003
L
2003 National Semiconductor Corporation
DS200853
www.national.com
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PDF描述 |
|---|---|
| LP3945 | Battery Charge Management System |
| LP3945ILD | Battery Charge Management System |
| LP3945ILDX | Battery Charge Management System |
| LP3961ES-1.8 | 800mA Fast Ultra Low Dropout Linear Regulators |
| LP3961ES-2.5 | 800mA Fast Ultra Low Dropout Linear Regulators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3944ISQ | 功能描述:LED照明驅(qū)動(dòng)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 |
| LP3944ISQ/NOPB | 功能描述:LED照明驅(qū)動(dòng)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 |
| LP3944ISQEV | 功能描述:電源管理IC開發(fā)工具 LP3944 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP3944ISQEV/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Board For LED Driver 8Segment 2.5V/3.3V/5V T/R |
| LP3944ISQX | 功能描述:LED照明驅(qū)動(dòng)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 |
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