- 您现在的位置：买卖IC网 > PDF目录22018 > PCA9685BS,118 (NXP Semiconductors)IC LED DVR PWM 16CH HVQFN28 PDF资料下载
参数资料
| 型号： | PCA9685BS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 24/51页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR PWM 16CH HVQFN28 |
| 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-VQFN 裸露焊盘 |
| 供应商设备封装： | 28-HVQFN（6x6） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 568-5305-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I 2 C-bus LED controller
7.3.4 ALL_LED_ON and ALL_LED_OFF control
The ALL_LED_ON and ALL_LED_OFF registers allow just four I 2 C-bus write sequences
to fill all the ON and OFF registers with the same patterns.
Table 7. ALL_LED_ON and ALL_LED_OFF control registers (address FAh to FEh) bit description
Legend: * default value.
Address Register
Bit Symbol
Access Value
Description
FAh
ALL_LED_ON_L
7:0 ALL_LED_ON_L[7:0]
W only
0000 0000* LEDn_ON count for ALL_LED, 8 MSBs
FBh
ALL_LED_ON_H
7:5 reserved
4
ALL_LED_ON_H[4]
R
W only
000*
1*
non-writable
ALL_LED full ON
3:0 ALL_LED_ON_H[3:0]
W only
0000* LEDn_ON count for ALL_LED, 4 MSBs
FCh
ALL_LED_OFF_L
7:0 ALL_LED_OFF_L[7:0] W only
0000 0000* LEDn_OFF count for ALL_LED,
8 MSBs
FDh
ALL_LED_OFF_H 7:5 reserved
R
000*
non-writable
4
ALL_LED_OFF_H[4]
W only
1*
ALL_LED full OFF
3:0 ALL_LED_OFF_H[3:0] W only
0000* LEDn_OFF count for ALL_LED,
4 MSBs
FEh
PRE_SCALE
7:0 PRE_SCALE[7:0]
R/W
0001 1110* prescaler to program the output
frequency
The LEDn_ON and LEDn_OFF counts can vary from 0 to 4095. The LEDn_ON and
LEDn_OFF count registers should never be programmed with the same values.
Because the loading of the LEDn_ON and LEDn_OFF registers is via the I 2 C-bus, and
asynchronous to the internal oscillator, we want to ensure that we do not see any visual
artifacts of changing the ON and OFF values. This is achieved by updating the changes at
the end of the LOW cycle.
7.3.5 PWM frequency PRE_SCALE
The hardware forces a minimum value that can be loaded into the PRE_SCALE register
at ‘3’. The PRE_SCALE register defines the frequency at which the outputs modulate. The
prescale value is determined with the formula shown in Equation 1 :
prescale value = round ? ? ? ? – 1
--------------------------------------------------
osc _ clock
4096 × update _ rate
(1)
where the update rate is the output modulation frequency required. For example, for an
output frequency of 200 Hz with an oscillator clock frequency of 25 MHz:
prescale value = round ? --------------------------- ? – 1 = 30
25 MHz
? 4096 × 200 ?
(2)
The PRE_SCALE register can only be set when the SLEEP bit of MODE1 register is set to
logic 1.
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.
24 of 51
相关PDF资料 |
PDF描述 |
|---|---|
| VI-BWD-CV-F4 | CONVERTER MOD DC/DC 85V 150W |
| ESC60DREF-S734 | CONN EDGECARD 120POS .100 EYELET |
| TAP686K010FCS | CAP TANT 68UF 10V 10% RADIAL |
| VI-BWJ-CV-F1 | CONVERTER MOD DC/DC 36V 150W |
| ABM02DRTN | CONN EDGECARD 4POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9685PW | 制造商:NXP Semiconductors 功能描述:IC LED DRIVER RGBA 28-TSSOP 制造商:NXP Semiconductors 功能描述:IC, LED DRIVER, RGBA, 28-TSSOP 制造商:NXP Semiconductors 功能描述:IC, LED DRIVER, RGBA, 28-TSSOP; No. of Outputs:16; Output Current:25mA; Output Voltage:5.5V; Driver Case Style:TSSOP; Input Voltage Min:2.3V; Input Voltage Max:5.5V; Dimming Control Type:PWM; Switching Frequency:1MHz; Operating ;RoHS Compliant: Yes |
| PCA9685PW,112 | 功能描述:LED显示驱动器 I2C Bus LED Controller 28-Pin RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| PCA9685PW,118 | 功能描述:LED显示驱动器 I2C Bus LED Controller 28-Pin RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| PCA9685PW/Q900,118 | 功能描述:LED显示驱动器 LED Driver 2.3V-5.5V 6mA RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| 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 |
发布紧急采购，3分钟左右您将得到回复。