PCA9956BTW | NXP 半导体

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24通道Fm+ I²C总线57mA/20V恒定电流LED驱动器

PCA9956BTW
正常供应

PCA9956B是由I²C总线控制的24通道恒流LED驱动器，适合对娱乐产品的57mA红色/绿色/蓝色/琥珀色(RGBA)LED进行调光和闪烁控制。每个LED输出各自带有8位分辨率(256阶)固定频率的独立PWM控制器，该控制器工作频率为31.25kHz，占空比从0%至99.6%可调，允许将LED设为特定的亮度值。额外的8位分辨率(256阶)分组PWM控制器既有122Hz的固定频率又有15Hz至每16.8秒一次的可调频率，占空比从0%至99.6%可调，用于以相同值对所有LED进行调光或闪烁控制。

每个LED输出可以是关、开(无PWM控制)、按独立PWM控制器的值或按单独和分组PWM控制器的值设置。PCA9956B的工作电源电压范围为3V至5.5V，恒定灌电流LED输出允许最高20V的LED电源。输出峰值电流可通过8位线性DAC调节，范围为225µA至57mA。

此器件具有内置开路、短路负载和过温检测电路。可通过I²C总线读取相应寄存器中的错误信息。此外，热关闭功能会在内部结温超过工艺允许的极限时保护器件。

PCA9956B器件具备快速模式Plus(Fm+)I²C总线接口。Fm+器件提供更高的频率(最高1MHz)或更密集的总线操作(最高4000pF)。

低电平有效输出使能输入引脚(OE)能使所有LED输出闪烁并可用于外部PWM输出，这在需要对多个器件一起进行调光或闪烁控制时非常有用，无需使用软件控制。

软件可编程LED分组和3个子呼叫I²C总线地址允许所有或规定分组的PCA9956B器件响应公共I²C总线地址，例如，允许同时打开或关闭所有红色LED或产生选取框追逐效果，从而最大程度减少I²C总线命令。上电时，PCA9956B会具有独特的子呼叫地址以将其识别为24通道LED驱动器。这样可以让具有不同通道带宽的器件混合使用。PCA9956B有3个硬件地址引脚，允许同一总线上存在最多125个器件。

软件复位(SWRST)功能允许控制器通过I²C总线对PCA9956B进行复位，与上电复位(POR)完全相同，将寄存器初始化为默认状态，使输出电流开关为OFF(LED关)。这能方便且快速地将所有器件寄存器重新配置为相同的条件。

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特性

微控制器(MCU)

  • 24个LED驱动器。每个输出可编程：
    • 关
    • 开
    • LED亮度可设置
    • 单个LED亮度+分组调光/闪烁可设置
    • LED输出延迟可设置，以减少EMI和浪涌电流
  • 24个恒流输出通道可灌入高达57mA电流，关断时可承受高达20V电压
  • 通过外部电阻调节输出电流(REXT输入)
  • 输出电流精度
    • 输出通道之间的精度为±4%
    • PCA9956B器件之间精度为±6%
  • 开路/短路负载/过温检测模式可检测单个LED故障
  • 1MHz快速模式Plus兼容I²C总线接口的SDA输出具有30mA的高驱动能力，可驱动高电容总线
  • 使用31.25kHz PWM信号，可按256阶(8位)线性编程使每个LED输出亮度从全关(默认)到最大亮度之间变化
  • 256阶分组亮度控制支持从完全关闭至最大亮度(默认)之间的常规调光(使用122Hz PWM信号)
  • 256阶分组闪烁频率可编程范围为15Hz至16.8s，占空比范围为0%至99.6%
  • 输出状态可编程为根据Acknowledge或STOP命令变化，以逐字节或同时全部的方式更新输出(默认设为“根据STOP变化”)。
  • 低电平有效输出使能(OE)输入引脚允许硬件控制LED的闪烁和调光
  • 3个硬件地址引脚允许将125个PCA9956B器件连接至同一根I²C总线并进行单独编程
  • 4个软件可编程I²C总线地址(一个LED分组呼叫地址和3个LED子呼叫地址)允许以任意组合同时对器件组进行寻址(例如，一个寄存器用于“全呼叫”使I²C总线上的所有PCA9956B可同时进行寻址，而第二个寄存器用于3个不同地址，同时对总线上全部器件的1⁄3以分组方式进行寻址)。软件可以启用和禁用每个可编程I²C总线地址
  • 独特的上电默认子呼叫地址允许将不同通道宽度的器件混合起来
  • 软件复位功能(SWRST调用)允许通过I²C总线复位器件
  • 8MHz内部振荡器无需外部组件
  • 内部上电复位
  • SDA/SCL输入均有噪音滤波器
  • 上电时LEDn输出无毛刺
  • 低待机电流
  • 工作电源电压(VDD)范围为3V至5.5V
  • 非LED引脚容许5.5V输入电压
  • 工作温度范围：-40°C至+85°C
  • ESD保护：按JESD22-A114超过3000V HBM
  • 根据JEDEC标准JESD78完成超过100mA的闭锁测试
  • 封装方式：HTSSOP38

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N true 0 PSPPCA9956BTWzh 5 包装信息 Packing Information t935 1 封装信息 Package Information t790 1 手册 Brochure t518 1 数据手册 Data Sheet t520 1 用户指南 User Guide t792 1 zh zh zh 数据手册 Data Sheet 1 1 1.2 English 1443669907490728060957 PSP 1.5 MB None None documents None 1443669907490728060957 /docs/en/data-sheet/PCA9956B.pdf 1486098 /docs/en/data-sheet/PCA9956B.pdf PCA9956B documents N N 2020-06-10 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver /docs/en/data-sheet/PCA9956B.pdf /docs/en/data-sheet/PCA9956B.pdf Data Sheet N 980000996212993340 2024-10-21 pdf N en Jun 10, 2020 980000996212993340 Data Sheet Y N 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver 用户指南 User Guide 1 2 2 English The PCA9956B evaluation board features LEDs for color mixing, blinking and dimming demonstrations. A graphical interface allows the user to easily explore the different functions of the driver. The board can be connected in series with other I2C demo-boards to create an evaluation system. 1506615647498684662931 PSP 968.2 KB None None documents None 1506615647498684662931 /docs/en/user-guide/UM10709.pdf 968218 /docs/en/user-guide/UM10709.pdf UM10709- documents N N 2017-09-28 PCA9956B demonstration board OM13321 /docs/en/user-guide/UM10709.pdf /docs/en/user-guide/UM10709.pdf User Guide N 132339537837198660 2024-10-18 pdf N en Aug 11, 2017 132339537837198660 User Guide Y N PCA9956B demonstration board OM13321 手册 Brochure 1 3 0 Japanese LEDs are used for status indication and fun lighting. LED controllers offload the system processor work load and power into small package. 1537464109287702482909ja PSP 955.2 KB None None documents None 1537464109287702482909 /docs/ja/brochure/LED-CONTROLLERS-FINAL-DELIVERABLES.pdf 955197 /docs/ja/brochure/LED-CONTROLLERS-FINAL-DELIVERABLES.pdf LED-DRIVER-SELECTOR-GUIDE documents N N 2018-09-20 LED Drivers Selector Guide /docs/ja/brochure/LED-CONTROLLERS-FINAL-DELIVERABLES.pdf /docs/ja/brochure/LED-CONTROLLERS-FINAL-DELIVERABLES.pdf Brochure N 712453003803778552 2024-10-18 ja Jan 4, 2022 712453003803778552 Brochure Y N LEDコントローラ 5 English LED Drivers, Voltage-switch and constant-current drivers 1537464109287702482909 PSP 955.2 KB None None documents None 1537464109287702482909 /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf 955197 /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf LED-DRIVER-SELECTOR-GUIDE documents N N 2018-09-20 LED Drivers Selector Guide /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf Brochure N 712453003803778552 2024-10-18 pdf N en Sep 20, 2024 712453003803778552 Brochure Y N LED Drivers Selector Guide 封装信息 Package Information 1 4 1.0 English 1455079405919712392580 PSP 639.2 KB None None documents None 1455079405919712392580 /docs/en/package-information/SOT1331-1.pdf 639185 /docs/en/package-information/SOT1331-1.pdf SOT1331-1 documents N N 2016-02-12 plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad /docs/en/package-information/SOT1331-1.pdf /docs/en/package-information/SOT1331-1.pdf Package Information N 302435339416912908 2022-12-07 pdf N en Feb 8, 2016 302435339416912908 Package Information Y N plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad 包装信息 Packing Information 1 5 1.0 English 1442131317139709209231 PSP 445.9 KB None None documents None 1442131317139709209231 /docs/en/packing/SOT1331-1_518.pdf 445865 /docs/en/packing/SOT1331-1_518.pdf SOT1331-1_518 documents N N 2014-08-08 HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 /docs/en/packing/SOT1331-1_518.pdf /docs/en/packing/SOT1331-1_518.pdf Packing Information N 145666923842250347 2022-12-07 pdf N en Aug 8, 2014 145666923842250347 Packing Information Y N HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 false 0 PCA9956BTW downloads zh-Hans true 1 Y PSP Y Y 包装信息 1 /docs/en/packing/SOT1331-1_518.pdf 2014-08-08 1442131317139709209231 PSP 5 Aug 8, 2014 Packing Information None /docs/en/packing/SOT1331-1_518.pdf English documents 445865 None 145666923842250347 2022-12-07 N /docs/en/packing/SOT1331-1_518.pdf HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 /docs/en/packing/SOT1331-1_518.pdf documents 145666923842250347 Packing Information N en None Y pdf 1.0 N N HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 445.9 KB SOT1331-1_518 N 1442131317139709209231 封装信息 1 /docs/en/package-information/SOT1331-1.pdf 2016-02-12 1455079405919712392580 PSP 4 Feb 8, 2016 Package Information None /docs/en/package-information/SOT1331-1.pdf English documents 639185 None 302435339416912908 2022-12-07 N /docs/en/package-information/SOT1331-1.pdf plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad /docs/en/package-information/SOT1331-1.pdf documents 302435339416912908 Package Information N en None Y pdf 1.0 N N plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad 639.2 KB SOT1331-1 N 1455079405919712392580 手册 1 /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf 2018-09-20 1537464109287702482909 PSP 3 Sep 20, 2024 Brochure LED Drivers, Voltage-switch and constant-current drivers None /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf English documents 955197 None 712453003803778552 2024-10-18 N /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf LED Drivers Selector Guide /docs/en/brochure/LED-DRIVER-SELECTOR-GUIDE.pdf documents 712453003803778552 Brochure N en None Y pdf 5 N N LED Drivers Selector Guide 955.2 KB LED-DRIVER-SELECTOR-GUIDE N 1537464109287702482909 数据手册 1 /docs/en/data-sheet/PCA9956B.pdf 2020-06-10 1443669907490728060957 PSP 1 Jun 10, 2020 Data Sheet None /docs/en/data-sheet/PCA9956B.pdf English documents 1486098 None 980000996212993340 2024-10-21 N /docs/en/data-sheet/PCA9956B.pdf 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver /docs/en/data-sheet/PCA9956B.pdf documents 980000996212993340 Data Sheet N en None Y pdf 1.2 N N 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver 1.5 MB PCA9956B N 1443669907490728060957 用户指南 1 /docs/en/user-guide/UM10709.pdf 2017-09-28 1506615647498684662931 PSP 2 Aug 11, 2017 User Guide The PCA9956B evaluation board features LEDs for color mixing, blinking and dimming demonstrations. A graphical interface allows the user to easily explore the different functions of the driver. The board can be connected in series with other I2C demo-boards to create an evaluation system. None /docs/en/user-guide/UM10709.pdf English documents 968218 None 132339537837198660 2024-10-18 N /docs/en/user-guide/UM10709.pdf PCA9956B demonstration board OM13321 /docs/en/user-guide/UM10709.pdf documents 132339537837198660 User Guide N en None Y pdf 2 N N PCA9956B demonstration board OM13321 968.2 KB UM10709- N 1506615647498684662931 true Y Products

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5 文件

紧凑列表

包装信息 (1)
封装信息 (1)
手册 (1)
数据手册 (1)
用户指南 (1)

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硬件

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2 硬件

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