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参数资料
| 型号： | PCA9553D02 |
| 厂商： | NXP Semiconductors N.V. |
| 元件分类： | LED驱动器 |
| 英文描述： | 4-bit I2C LED driver with programmable blink rates |
| 中文描述： | 4位I2C LED与可编程闪烁率司机 |
| 文件页数： | 9/18页 |
| 文件大小： | 130K |
| 代理商： | PCA9553D02 |
Philips Semiconductors
Product data sheet
PCA9553
4-bit I
2
C LED driver with programmable blink rates
2004 Oct 01
9
APPLICATION DATA
PCA9553
V
SS
SDA
SCL
V
DD
I
2
C/SMBus MASTER
SW01039
SDA
SCL
LED0
LED1
5 V
5 V
LED2
LED3
10 k
10 k
Figure 13. Typical application
Minimizing I
DD
when the I/O is used to control LEDs
When the I/Os are used to control LEDs, they are normally connected to V
DD
through a resistor as shown in Figure 13. Since the LED acts as a
diode, when the LED is off the I/O V
IN
is about 1.2 V less than V
DD
. The supply current, I
DD
, increases as V
IN
becomes lower than V
DD
and is
specified as
I
DD
in the DC characteristics table.
Designs needing to minimize current consumption, such as battery power applications, should consider maintaining the I/O pins greater than or
equal to V
DD
when the LED is off. Figure 14 shows a high value resistor in parallel with the LED. Figure 15 shows V
DD
less than the LED supply
voltage by at least 1.2 V. Both of these methods maintain the I/O V
IN
at or above V
DD
and prevents additional supply current consumption when
the LED is off.
V
DD
V
DD
LEDx
LED
100 k
SW02086
Figure 14. High value resistor in parallel with the LED
V
DD
3.3 V
LEDx
LED
SW02087
5 V
Figure 15. Device supplied by a lower voltage
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9553DP | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C LED driver with programmable blink rates |
| PCA9553DP/01 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C-bus LED driver with programmable blink rates |
| PCA9553DP/01,118 | 功能描述:LED照明驱动器 4BIT I2C FM OD LED BLK 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 |
| PCA9553DP/01118 | 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: |
| PCA9553DP/02 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C-bus LED driver with programmable blink rates |
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