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參數資料
| 型號： | PCA9533DP02 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 4-bit I2C LED dimmer |
| 中文描述： | 4位I2C LED調光 |
| 文件頁數： | 9/18頁 |
| 文件大?。?/td> | 133K |
| 代理商： | PCA9533DP02 |
Philips Semiconductors
Product data sheet
PCA9533
4-bit I
2
C LED dimmer
2004 Oct 01
9
APPLICATION DATA
PCA9533
V
SS
SDA
SCL
V
DD
I
2
C/SMBus MASTER
SW02047
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
相關PDF資料 |
PDF描述 |
|---|---|
| PCA9534 | 8-bit I2C and SMBus, low power I/O port with interrupt |
| PCA9535 | 16-bit I2C and SMBus, low power I/O port with interrupt |
| PCA9536 | 4-bit I2C and SMBus I/O port |
| PCA9538 | 8-bit I2C and SMBus low power I/O port with interrupt and reset |
| PCA9539 | 16-bit I2C and SMBus, low power I/O port with interrupt and reset |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PCA9534 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C and SMBus, low power I/O port with interrupt |
| PCA9534A | 制造商:TI 制造商全稱: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 制造商全稱: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 制造商全稱: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擴展器 Remote 8B I2C & Lo- Pwr I/O Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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