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參數(shù)資料
| 型號： | PCA9553D |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 4-bit I2C-bus LED driver with programmable blink rates |
| 封裝： | PCA9553D/01<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,;PCA9553D/01<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, |
| 文件頁數(shù)： | 3/26頁 |
| 文件大小： | 146K |
| 代理商： | PCA9553D |
PCA9553_6
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 29 December 2008
11 of 26
NXP Semiconductors
PCA9553
4-bit I2C-bus LED driver with programmable blink rates
9.
Application design-in information
9.1 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 15. 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 lower
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.
This gure assumes the command byte has previously been programmed with 00h.
PCA9553/01 shown.
Fig 14. Read input port register
1000101
A
S1
START condition
R/W
acknowledge
from slave
002aad748
A
acknowledge
from master
SDA
NA
read from
port
data into
port
P
th(D)
data from port
no acknowledge
from master
data from port
DATA 4
slave address
DATA 1
STOP
condition
DATA 2
DATA 3
DATA 4
tsu(D)
Fig 15. Typical application
PCA9553
LED0
LED1
SDA
SCL
5 V
I2C-BUS/SMBus
MASTER
002aad749
SDA
SCL
VDD
VSS
5 V
10 k
LED2
LED3
10 k
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9553D/01 | 功能描述:LED照明驅(qū)動器 LED DRVR 4BIT I2C 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 |
| PCA9553D/01,112 | 功能描述:LED照明驅(qū)動器 LED DRVR 4BIT I2C 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 |
| PCA9553D/01,118 | 功能描述:LED照明驅(qū)動器 4-BIT I2C FM OD LED BLK 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 |
| PCA9553D/01112 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| PCA9553D/02 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4-bit I2C-bus LED driver with programmable blink rates |
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