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參數(shù)資料
| 型號： | PCA9550D |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 2-bit I2C-bus LED driver with programmable blink rates |
| 封裝： | PCA9550D<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,;PCA9550D<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,; |
| 文件頁數(shù)： | 22/26頁 |
| 文件大?。?/td> | 150K |
| 代理商： | PCA9550D |
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PCA9550_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 13 October 2008
5 of 26
NXP Semiconductors
PCA9550
2-bit I2C-bus LED driver with programmable blink rates
6.2.1 Control register denition
6.3 Register descriptions
6.3.1 INPUT - Input register
The INPUT register reects the state of the device pins. Writes to this register will be
acknowledged but will have no effect.
Remark: The default value ‘X’ is determined by the externally applied logic level (normally
logic 1) when used for directly driving LED with pull-up to VDD.
6.3.2 PSC0 - Frequency Prescaler 0
PSC0 is used to program the period of the PWM output.
The period of BLINK0 = (PSC0 + 1) / 44.
6.3.3 PWM0 - Pulse Width Modulation 0
The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED off)
when the count is less than the value in PWM0 and HIGH when it is greater. If PWM0 is
programmed with 00h, then the PWM0 output is always LOW.
The duty cycle of BLINK0 = (256
PWM0) / 256.
Table 4.
Register summary
B2
B1
B0
Register name
Access
Description
0
INPUT
read only
input register
0
1
PSC0
read/write
frequency prescaler 0
0
1
0
PWM0
read/write
PWM register 0
0
1
PSC1
read/write
frequency prescaler 1
1
0
PWM1
read/write
PWM register 1
1
0
1
LS0
read/write
LED selector
Table 5.
INPUT - Input register description
Bit
7
6
5
4
3
2
1
0
Symbol
not used
LED1
LED0
Default
000000
X
Table 6.
PSC0 - Frequency Prescaler 0 register description
Bit
7
6
5
4
3
2
1
0
Symbol
PSC0[7]
PSC0[6]
PSC0[5]
PSC0[4]
PSC0[3]
PSC0[2]
PSC0[1]
PSC0[0]
Default
11111111
Table 7.
PWM0 - Pulse Width Modulation 0 register description
Bit
7
6
5
4
3
2
1
0
Symbol
PWM0
[7]
PWM0
[6]
PWM0
[5]
PWM0
[4]
PWM0
[3]
PWM0
[2]
PWM0
[1]
PWM0
[0]
Default
10000000
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9550D,112 | 功能描述:LED照明驅(qū)動器 2-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 |
| PCA9550D,118 | 功能描述:LED照明驅(qū)動器 2-BIT I2C FM OD LED BLK RST 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 |
| PCA9550D112 | 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: |
| PCA9550DP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-bit I2C LED driver with programmable blink rates |
| PCA9550DP,118 | 功能描述:LED照明驅(qū)動器 2-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 |
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