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参数资料
| 型号： | PCA9551BS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 7/26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 |
NXP Semiconductors
PCA9551
8-bit I 2 C-bus LED driver with programmable blink rates
6.3.6 LS0 to LS1 - LED selector registers
The LSn LED select registers determine the source of the LED data.
00 = output is set LOW (LED on)
01 = output is set high-impedance (LED off; default)
10 = output blinks at PWM0 rate
11 = output blinks at PWM1 rate
Table 9. LS0 to LS1 - LED selector registers bit description
Legend: * default value.
Register
Bit
Value
Description
LS0 - LED0 to LED3 selector
LS0
7:6
5:4
3:2
1:0
01*
01*
01*
01*
LED3 selected
LED2 selected
LED1 selected
LED0 selected
LS1 - LED4 to LED7 selector
LS1
7:6
5:4
3:2
1:0
01*
01*
01*
01*
LED7 selected
LED6 selected
LED5 selected
LED4 selected
6.4 Pins used as GPIOs
LED pins not used to control LEDs can be used as general purpose I/Os (GPIOs).
For use as input, set LEDn to high-impedance (01) and then read the pin state via the
Input register.
For use as output, connect external pull-up resistor to the pin and size it according to the
DC recommended operating characteristics. LEDn output pin is HIGH when the output is
programmed as high-impedance, and LOW when the output is programmed LOW through
the ‘LED selector’ register. The output can be pulse-width controlled when PWM0 or
PWM1 are used.
6.5 Power-on reset
When power is applied to V DD , an internal Power-On Reset (POR) holds the PCA9551 in
a reset condition until V DD has reached V POR . At that point, the reset condition is released
and the PCA9551 registers are initialized to their default states, all the outputs in the
OFF state. Thereafter, V DD must be lowered below 0.2 V to reset the device.
6.6 External RESET
A reset can be accomplished by holding the RESET pin LOW for a minimum of t w(rst) . The
PCA9551 registers and I 2 C-bus state machine will be held in their default states until the
RESET input is once again HIGH.
This input requires a pull-up resistor to V DD if no active connection is used.
PCA9551_8
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 31 July 2008
7 of 26
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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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