数据手册DataSheet 下载PCA9531PW 8位I2C总线LED调光器.pdf

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。

产品特点
  • 8个LED驱动器(开、关、闪光速率可编程)
  • 2个可选、完全可编程闪烁速率(频率和占空比)范围为0.59 Hz至152 Hz(1.69 s和6.58 ms)
  • 256阶亮度
  • 未用作LED驱动器的输入/输出可用作常规GPIO
  • 集成内部振荡器,无需外部元件
  • I²C总线接口逻辑兼容SMBus
  • 内部上电复位
  • SCL/SDA输入端提供噪音滤波器
  • 低电平有效复位输入
  • 8个开漏输出直接驱动LED至25 mA
  • 输出端边沿速率控制
  • 上电时无干扰
  • 支持热插拔
  • 低待机电流
  • 电源电压工作范围:2.3 V至5.5 V
  • 时钟频率:0 Hz至400 kHz
  • ESD保护:超过2000 V HBM(符合JESD22-A114标准),超过150 V MM(符合JESD22-A115标准)以及超过1000 V CDM(符合JESD22-C101标准)
  • 已完成JEDEC标准JESD78闩锁测试(超过100 mA)
  • 封装类型:SO16、TSSOP16、HVQFN16
功能框图
演示板
订购型号
订购型号封装Outline versionReflow-/Wave soldering包装产品状态标示订购器件的编号
PCA9531PWTSSOP16 (SOT403-1)sot403-1_posot403-1_fr
SSOP-TSSOP-VSO-WAVE
Reel Pack, SMD, 13" Q1/T1激活PCA9531PCA9531PW,118( 9352 747 29118 )
品质、可靠性及RoHS化学成分
订购型号订购器件的编号RoHS / RHF无铅开始日期EFRIFR (FIT)MTBF(小时)潮湿敏感度等级MSL LF
PCA9531PWPCA9531PW,118week 48, 20040.02.05E811
PCA9531PWPCA9531PW,112week 48, 20040.02.05E811
产品技术资料
文档标题类型分类格式更新日期
PCA9531 (中文):8-bit I2C-bus LED dimmerData sheetpdf2009-02-19
AN10441:Level shifting techniques in I2C-bus designApplication notepdf2007-06-20
AN10148:PCA9564 - I2C-bus controllerApplication notepdf2004-11-22
AN10149:PCA9564 Evaluation BoardApplication notepdf2004-08-19
AN10315:LED dimmer demoboardApplication notepdf2005-01-11
AN10397:How to use the SC18IM700 to control any I2C-bus deviceApplication notepdf2005-12-05
75016543:Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for major home appliancesBrochurepdf2008-06-01
75017588:LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED driversBrochurepdf2014-07-03
75017388:Development Tools for ARM-based microcontrollersLeafletpdf2014-04-18
75016073:LED dimming with GPIO expansion; NXP 2/4/8/16-bit I2C/SMBus LED dimmers PCA9530/31/32/33Leafletpdf2007-06-01
75017424:NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concernsLeafletpdf2013-05-23
UM10204:I2C-bus specification and user manualUser manualpdf2014-04-28
UM10206:I2C Demonstration Board 2005-1 Quick Start GuideUser manualpdf2006-06-12
UM10317:PCA9633 demonstration board OM6282User manualpdf2008-12-15
UM10204_JA:I2C-bus specification and user manualUser manualpdf2013-04-03
SOT403-1_118:TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packingpdf2013-04-08
SOT403-1_128:TSSOP16; Reel pack; SMD, 13", Turned Q2/T3 Standard product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128Packingpdf2013-04-25
SOT403-1_623:TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or HL; Ordering code (12NC) ending 623Packingpdf2013-05-15
SOT403-1_653:TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packingpdf2013-05-15
SSOP-TSSOP-VSO-WAVE:Footprint for wave solderingWave solderingpdf2009-10-08
sot403-1_po:plastic thin shrink small outline package; 16 leads; body width 4.4 mmOutline drawingpdf2009-10-08
sot403-1_fr:Footprint for reflow soldering SOT403-1Reflow solderingpdf2009-10-08
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
SOT403-1 LPC812M101JDH16
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC812M101JDH16
PCA9531
PCA9633