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参数资料
| 型号： | PCA9533DP/02,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER RGB 8-TSSOP |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，LED 闪烁器 |
| 类型 - 次要： | RGB |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 配用： | 568-4003-ND - DEMO BOARD LED DIMMER 568-3512-ND - DEMO BOARD UART TO I2C |
| 其它名称： | 568-3375-6 |
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| PCA9534ADB | 功能描述:接口-I/O扩展器 Remote 8B I2C & Lo- Pwr I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
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