PCA9531BS: 8位I2C总线LED调光器

PCA9531是一款8位I²C总线和SMBus I/O扩展器,针对红/绿/蓝 (RGB)色彩混合和背光应用中的独立256阶调光LED进行了优化。

PCA9531集成内部振荡器,具有两个用户可编程闪烁速率和占空比,并耦合至输出PWM信号。 通过将闪烁速率设为足够高(100 Hz以上,直到无法以肉眼看出闪烁),然后利用占空比改变LED开启时间,从而改变流经LED的平均电流,即可控制LED亮度。

初始建立序列编程为每个独立PWM设置两个闪烁速率/占空比。此后,仅需总线主机发出一条命令,便可对单个LED执行开启、关闭、闪烁速率1或闪烁速率2等操作。根据编程设置的频率和占空比,闪烁速率1和闪烁速率2将使LED表现为不同的亮度,或以最长为1.69 s的周期闪烁。开漏输出以每位25 mA以及每封装100 mA的最大输出吸电流直接驱动LED。

若要以比1.69 s更长的周期闪烁LED,则总线主机(MCU、MPU、DSP、芯片组等)必须发送重复命令以开启和关闭LED,与使用一般I/O扩展器(如恩智浦PCF8574或PCA9554)所需完成的操作相同。 所有未用来控制LED的位都可用作通用并行输入/输出(GPIO)扩展,当需要额外I/O作为ACPI电源开关、传感器、按钮、报警监控、风扇等功能时可提供简易解决方案。

低电平有效硬件复位针脚(RESET)和上电复位(POR)可将寄存器初始化为它们的默认状态,使位变为高电平(LED关闭)。

PCA9531上的3个硬件地址针脚允许在一条总线上运行8个器件。

PCA9531BS: 产品结构框图
sot629-1_3d
数据手册 (1)
名称/描述Modified Date
8-bit I2C-bus LED dimmer (REV 6.0) PDF (156.0 kB) PCA9531 [English]19 Feb 2009
应用说明 (5)
名称/描述Modified Date
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 [English]20 Jun 2007
How to use the SC18IM700 to control any I2C-bus device (REV 1.0) PDF (75.0 kB) AN10397 [English]05 Dec 2005
LED dimmer demoboard (REV 1.0) PDF (392.0 kB) AN10315 [English]11 Jan 2005
PCA9564 - I2C-bus controller (REV 1.0) PDF (352.0 kB) AN10148 [English]22 Nov 2004
PCA9564 Evaluation Board (REV 1.0) PDF (2.0 MB) AN10149 [English]19 Aug 2004
用户指南 (4)
名称/描述Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204 [English]28 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA [English]03 Apr 2013
PCA9633 demonstration board OM6282 (REV 1.0) PDF (337.0 kB) UM10317 [English]15 Dec 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206 [English]13 Jun 2006
手册 (5)
名称/描述Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540 [English]01 Aug 2014
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers (REV 1.0) PDF (2.7 MB) 75017588 [English]03 Jul 2014
Development Tools for ARM-based microcontrollers (REV 2.1) PDF (374.0 kB) 75017388 [English]18 Apr 2014
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... (REV 1.0) PDF (1.1 MB) 75016543 [English]01 Jun 2008
LED dimming with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED dimmers PCA9530/31/32/33 (REV 1.0) PDF (212.0 kB) 75016073 [English]01 Jun 2007
封装信息 (1)
名称/描述Modified Date
plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 4 x 4 x 0.85 mm (REV 1.0) PDF (200.0 kB) SOT629-1 [English]08 Feb 2016
包装 (1)
名称/描述Modified Date
HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (259.0 kB) SOT629-1_118 [English]17 Apr 2013
订购信息
型号状态Package version应用EnableOperating Temperature (Cel)PWMsI2C-bus interfaceReset input pinI2C-bus (kHz)Operating voltage (VDC)Max Sink Current per bit (mA)No of AddressesMax Sink Current, per package (mA)Number of bits
PCA9531BSActiveSOT629-1-40~852 (160 Hz to 1.6 sec)yes4002.3~5.52581008
封装环保信息
产品编号封装说明Outline Version回流/波峰焊接包装产品状态部件编号订购码 (12NC)Marking化学成分RoHS / 无铅 / RHF无铅转换日期EFRIFR(FIT)MTBF(小时)MSLMSL LF
PCA9531BSSOT629-1Reel 13" Q1/T1ActivePCA9531BS,118 (9352 747 32118)9531PCA9531BSAlways Pb-free0.02.05E811
8-bit I2C-bus LED dimmer PCA9531
Level shifting techniques in I2C-bus design pca9685pw
How to use the SC18IM700 to control any I2C-bus device PCA9531
LED dimmer demoboard PCA9533
PCA9564 - I2C-bus controller PCA9531
PCA9564 Evaluation Board PMBTA92
I2C-bus specification and user manual pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9633 demonstration board OM6282 pca9685pw
I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers pca9685pw
Development Tools for ARM-based microcontrollers PCA9531
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... PMEG6010CE_AUTOMOTIVE
LED dimming with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED dimmers PCA9530/31/32/33 PCA9551
plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 4 x 4 x 0.85 mm PCA9633
HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... PCA9633
PCA9531
PCA9633