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| 型号： | PCA9685PW/Q900,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 26/51页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTLR LED DVR 28TSSOP |
| 产品培训模块： | I²C Bus Fundamentals |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 16 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，LED 闪烁器 |
| 类型 - 次要： | RGBA |
| 频率： | 25MHz，50MHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 输出电压： | 5.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 568-5931-6 |
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NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I 2 C-bus LED controller
7.4 Active LOW output enable input
The active LOW output enable (OE) pin, allows to enable or disable all the LED outputs at
the same time.
? When a LOW level is applied to OE pin, all the LED outputs are enabled and follow
the output state defined in the LEDn_ON and LEDn_OFF registers with the polarity
defined by INVRT bit (MODE2 register).
? When a HIGH level is applied to OE pin, all the LED outputs are programmed to the
value that is defined by OUTNE[1:0] in the MODE2 register.
Table 10.
LED outputs when OE = 1
OUTNE1
0
0
1
1
OUTNE0
0
1
0
1
LED outputs
0
1 if OUTDRV = 1, high-impedance if OUTDRV = 0
high-impedance
high-impedance
The OE pin can be used as a synchronization signal to switch on/off several PCA9685
devices at the same time. This requires an external clock reference that provides blinking
period and the duty cycle.
The OE pin can also be used as an external dimming control signal. The frequency of the
external clock must be high enough not to be seen by the human eye, and the duty cycle
value determines the brightness of the LEDs.
7.5 Power-on reset
When power is applied to V DD , an internal power-on reset holds the PCA9685 in a reset
condition until V DD has reached V POR . At this point, the reset condition is released and the
PCA9685 registers and I 2 C-bus state machine are initialized to their default states.
Thereafter, V DD must be lowered below 0.2 V to reset the device.
PCA9685
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 2 September 2010
? NXP B.V. 2010. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9691BS/1 | 制造商:NXP Semiconductors 功能描述:IC ADC/DAC 8-BIT I2C 16-HVQFN 制造商:NXP Semiconductors 功能描述:IC, ADC/DAC, 8-BIT, I2C, 16-HVQFN |
| PCA9691BS/1,118 | 功能描述:I2C 接口集成电路 ADC/DAC 16-Pin HVQFN EP RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| PCA9691BS/1118 | 制造商:NXP Semiconductors 功能描述:PCA9691BS/HVQFN16/REEL13//1 |
| PCA9691T/1，112 | 制造商:NXP Semiconductors 功能描述: |
| PCA9691T/1，118 | 制造商:NXP Semiconductors 功能描述: |
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