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參數(shù)資料
| 型號： | PCA9551D |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 8-bit I2C-bus LED driver with programmable blink rates |
| 封裝： | PCA9551BS<SOT629-1 (HVQFN16)|<<http://www.nxp.com/packages/SOT629-1.html<1<Always Pb-free,;PCA9551D<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<we |
| 文件頁數(shù)： | 3/26頁 |
| 文件大?。?/td> | 155K |
| 代理商： | PCA9551D |
PCA9551_8
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 31 July 2008
11 of 26
NXP Semiconductors
PCA9551
8-bit I2C-bus LED driver with programmable blink rates
8.
Application design-in information
8.1 Minimizing IDD when the I/Os are used to control LEDs
When the I/Os are used to control LEDs, they are normally connected to VDD through a
resistor as shown in Figure 14. Since the LED acts as a diode, when the LED is off the
I/O VI is about 1.2 V less than VDD. The supply current, IDD, increases as VI becomes
Designs needing to minimize current consumption, such as battery power applications,
should consider maintaining the I/O pins greater than or equal to VDD when the LED is off.
than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O VI
at or above VDD and prevents additional supply current consumption when the LED is off.
LED0 to LED5 are used as LED drivers.
LED6 and LED7 are used as regular GPIOs.
Fig 14. Typical application
PCA9551
LED0
LED1
SDA
SCL
RESET
5 V
I2C-BUS/SMBus
MASTER
002aac510
SDA
SCL
VDD
A2
A1
A0
VSS
5 V
10 k
LED2
LED3
LED4
LED5
LED6
LED7
GPIOs
10 k
10 k
Fig 15. High value resistor in parallel with
the LED
Fig 16. Device supplied by a lower voltage
002aac189
LED
VDD
LEDn
100 k
VDD
002aac190
LED
VDD
LEDn
3.3 V
5 V
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| PCA9551PW | 8-bit I2C-bus LED driver with programmable blink rates |
| PCA9552BS | 16-bit I2C-bus LED driver with programmable blink rates |
| PCA9552D | 16-bit I2C-bus LED driver with programmable blink rates |
| PCA9552PW | 16-bit I2C-bus LED driver with programmable blink rates |
| PCA9553D | 4-bit I2C-bus LED driver with programmable blink rates |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9551D,112 | 功能描述:LED照明驅(qū)動器 I2C LED BLINKER 8BIT 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 |
| PCA9551D,118 | 功能描述:LED照明驅(qū)動器 8-BIT I2C FM OD LED BLK RST 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 |
| PCA9551D-T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C-bus LED driver with programmable blink rates |
| PCA9551PW | 功能描述:LED照明驅(qū)動器 I2C LED BLINKER 8BIT 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 |
| PCA9551PW,112 | 功能描述:LED照明驅(qū)動器 I2C LED BLINKER 8BIT 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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