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参数资料
| 型号： | PCA9551BS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER BLINKER 16-HVQFN |
| 产品培训模块： | LED Controllers I²C Bus Fundamentals |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | LED 闪烁器 |
| 频率： | 400kHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VQFN 裸露焊盘 |
| 供应商设备封装： | 16-HVQFN |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 844 (CN2011-ZH PDF) |
| 配用： | 568-4002-ND - DEMO BOARD I2C 568-3615-ND - DEMO BOARD I2C |
| 其它名称： | 568-3388-6 |
PCA9551
8-bit I 2 C-bus LED driver with programmable blink rates
Rev. 08 — 31 July 2008
Product data sheet
1. General description
The PCA9551 LED blinker blinks LEDs in I 2 C-bus and SMBus applications where it is
necessary to limit bus traf?c or free up the I 2 C-bus master's (MCU, MPU, DSP, chip set,
etc.) timer. The uniqueness of this device is the internal oscillator with two programmable
blink rates. To blink LEDs using normal I/O expanders like the PCF8574 or PCA9554, the
bus master must send repeated commands to turn the LED on and off. This greatly
increases the amount of traf?c on the I 2 C-bus and uses up one of the master's timers.
The PCA9551 LED blinker instead requires only the initial set-up command to program
BLINK RATE 1 and BLINK RATE 2 (i.e., the frequency and duty cycle) for each individual
output. From then on, only one command from the bus master is required to turn each
individual open-drain output on, off, or to cycle at BLINK RATE 1 or BLINK RATE 2.
Maximum output sink current is 25 mA per bit and 100 mA per package.
Any bits not used for controlling the LEDs can be used for General Purpose parallel
Input/Output (GPIO) expansion.
The active LOW hardware reset pin (RESET) and Power-On Reset (POR) initializes the
registers to their default state, all zeroes, causing the bits to be set HIGH (LED off).
Three hardware address pins on the PCA9551 allow eight devices to operate on the same
bus.
The newer Fast-mode Plus PCA9634 8-bit LED controller offers an individual PWM
dimming control for each channel for better color mixing capabilities with a global PWM for
dimming or blinking all channels at the same time. There are 126 possible address
combinations and the maximum output sink current is 25 mA per bit and 200 mA per
package.
2. Features
I 8 LED drivers (on, off, ?ashing at a programmable rate)
I 2 selectable, fully programmable blink rates (frequency and duty cycle) between
0.148 Hz and 38 Hz (6.74 seconds and 0.026 seconds)
I Input/outputs not used as LED drivers can be used as regular GPIOs
I Internal oscillator requires no external components
I I 2 C-bus interface logic compatible with SMBus
I Internal power-on reset
I Noise ?lter on SCL/SDA inputs
I Active LOW reset input
I 8 open-drain outputs directly drive LEDs to 25 mA
I Edge rate control on outputs
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| PCA9624PW,118 | IC LED DRIVER RGBA 24-TSSOP |
| PCA9625D/S911,518 | IC LED DRIVER RGBA 32-SOIC |
| PCA9626BS,518 | IC LED DRIVER RGBA 48HVQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9551BSHP | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9551BS-T | 功能描述:LED照明驱动器 8-BIT I2C FM OD LED BLK RST RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9551D | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit I2C LED driver with programmable blink rates |
| PCA9551D,112 | 功能描述:LED照明驱动器 I2C LED BLINKER 8BIT RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9551D,118 | 功能描述:LED照明驱动器 8-BIT I2C FM OD LED BLK RST RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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