收藏本站
NXP Semiconductors
PCA9533
4-bit I 2 C-bus LED dimmer
8. Application design-in information
5V
I 2 C-BUS/SMBus
MASTER
10 k ?
10 k ?
V DD
5V
SDA
SCL
SDA
SCL
LED0
LED1
LED2
LED3
PCA9533
V SS
002aae632
Fig 14. Typical application
8.1 Minimizing I DD when the I/Os are 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 14 . Since the LED acts as a diode, when the LED is off the
I/O V I is about 1.2 V less than V DD . The supply current, I DD , increases as V I becomes
lower than V DD and is speci?ed as ? I DD in Table 13 “Static characteristics” .
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 15 shows a high value resistor in parallel with the LED. Figure 16 shows V DD less
than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O V I
at or above V DD and prevents additional supply current consumption when the LED is off.
V DD
3.3 V
5V
V DD
LED
100 k ?
V DD
LED
PCA9533_3
LEDn
002aac189
Fig 15. High value resistor in parallel with
the LED
LEDn
002aac190
Fig 16. Device supplied by a lower voltage
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 April 2009
11 of 24
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PCA9550DP,118 IC LED DRIVER BLINKER 8-TSSOP
PCA9551BS,118 IC LED DRIVER BLINKER 16-HVQFN
PCA9552D,118 IC LED DRIVER BLINKER 24-SOIC
PCA9553DP/01,118 IC LED DRIVER LINEAR 8-TSSOP
PCA9624PW,118 IC LED DRIVER RGBA 24-TSSOP
PCA9625D/S911,518 IC LED DRIVER RGBA 32-SOIC
PCA9626BS,518 IC LED DRIVER RGBA 48HVQFN
PCA9632DP2,118 IC LED DRIVER RGBA 10-TSSOP
相关代理商/技术参数
PCA9533DP/02 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C-bus LED dimmer
PCA9533DP/02,118 功能描述:LED照明驱动器 4-BIT I2C-BUS LED DIMMER 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
PCA9533DP01 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C LED dimmer
PCA9533DP02 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C LED dimmer
PCA9534 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit I2C and SMBus, low power I/O port with interrupt
PCA9534A 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PCA9534A_10 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PCA9534A_101 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS