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PCA9685PW/Q900 PDF预览

PCA9685PW/Q900

更新时间： 2024-11-14 05:59:47
品牌 Logo 应用领域
恩智浦 - NXP 显示驱动器驱动程序和接口接口集成电路光电二极管控制器
页数 文件大小 规格书
50页 240K
描述
16-channel, 12-bit PWM Fm+ I2C-bus LED controller

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中文翻译

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PCA9685PW/Q900 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：TSSOP
包装说明：TSSOP,针数：28
Reach Compliance Code：compliant风险等级：5.07
Is Samacsys：N数据输入模式：SERIAL
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：R-PDSO-G28
JESD-609代码：e4长度：9.7 mm
湿度敏感等级：1复用显示功能：NO
功能数量：1区段数：16
端子数量：28最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.1 mm
最大供电电压：5.5 V最小供电电压：2.3 V
标称供电电压：3 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：NICKEL PALLADIUM GOLD
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：4.4 mm最小 fmax：1 MHz
Base Number Matches：1

PCA9685PW/Q900 数据手册

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PCA9685  
16-channel, 12-bit PWM Fm+ I2C-bus LED controller  
Rev. 02 — 16 July 2009  
Product data sheet  
1. General description  
The PCA9685 is an I2C-bus controlled 16-channel LED controller optimized for LCD  
Red/Green/Blue/Amber (RGBA) color backlighting applications. Each LED output has its  
own 12-bit resolution (4096 steps) fixed frequency individual PWM controller that operates  
at a programmable frequency from a typical of 40 Hz to 1000 Hz with a duty cycle that is  
adjustable from 0 % to 100 % to allow the LED to be set to a specific brightness value.  
All outputs are set to the same PWM frequency.  
Each LED output can be off or on (no PWM control), or set at its individual PWM controller  
value. The LED output driver is programmed to be either open-drain with a 25 mA current  
sink capability at 5 V or totem pole with a 25 mA sink, 10 mA source capability at 5 V. The  
PCA9685 operates with a supply voltage range of 2.3 V to 5.5 V and the inputs and  
outputs are 5.5 V tolerant. LEDs can be directly connected to the LED output (up to  
25 mA, 5.5 V) or controlled with external drivers and a minimum amount of discrete  
components for larger current or higher voltage LEDs.  
The PCA9685 is in the new Fast-mode Plus (Fm+) family. Fm+ devices offer higher  
frequency (up to 1 MHz) and more densely populated bus operation (up to 4000 pF).  
Although the PCA9635 and PCA9685 have many similar features, the PCA9685 has  
some unique features that make it more suitable for applications such as LCD backlighting  
and Ambilight:  
• The PCA9685 allows staggered LED output on and off times to minimize current  
surges. The on and off time delay is independently programmable for each of the  
16 channels. This feature is not available in PCA9635.  
• The PCA9685 has 4096 steps (12-bit PWM) of individual LED brightness control. The  
PCA9635 has only 256 steps (8-bit PWM).  
• When multiple LED controllers are incorporated in a system, the PWM pulse widths  
between multiple devices may differ if PCA9635s are used. The PCA9685 has a  
programmable prescaler to adjust the PWM pulse widths of multiple devices.  
• The PCA9685 has an external clock input pin that will accept user-supplied clock  
(50 MHz max.) in place of the internal 25 MHz oscillator. This feature allows  
synchronization of multiple devices. The PCA9635 does not have external clock input  
feature.  
• Like the PCA9635, PCA9685 also has a built-in oscillator for the PWM control.  
However, the frequency used for PWM control in the PCA9685 is adjustable from  
about 40 Hz to 1000 Hz as compared to the typical 97.6 kHz frequency of the  
PCA9635. This allows the use of PCA9685 with external power supply controllers. All  
bits are set at the same frequency.  
• The Power-On Reset (POR) default state of LEDn output pins is LOW in the case of  
PCA9685. It is HIGH for PCA9635.  
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