參數(shù)資料
型號(hào)： PCA9533D
廠商： NXP Semiconductors N.V.
元件分類(lèi)： LED驅(qū)動(dòng)器
英文描述： 4-bit I2C-bus LED dimmer
封裝： PCA9533D/01<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,;PCA9533D/01<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5,
文件頁(yè)數(shù)： 3/24頁(yè)
文件大?。?/td> 140K
代理商： PCA9533D
PCA9533_3
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 April 2009
11 of 24
NXP Semiconductors
PCA9533
4-bit I2C-bus LED dimmer
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
lower than VDD and is specied as IDD 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 VDD when the LED is off.
Figure 15 shows a high value resistor in parallel with the LED. Figure 16 shows VDD less
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.
Fig 14. Typical application
PCA9533
LED0
LED1
SDA
SCL
5 V
I2C-BUS/SMBus
MASTER
002aae632
SDA
SCL
VDD
VSS
5 V
LED2
LED3
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9533D/01 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:4-bit I2C-bus LED dimmer
PCA9533D/01,112 功能描述:LED照明驅(qū)動(dòng)器 4-BIT I2C FM OD LED DIM 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
PCA9533D/01,118 功能描述:LED照明驅(qū)動(dòng)器 4-BIT I2C FM OD LED 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
PCA9533D/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:
PCA9533D/01-T 功能描述:LED照明驅(qū)動(dòng)器 4-BIT I2C FM OD LED DIM 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
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