PCA9550: 2位I2C总线LED驱动器，具有可编程闪烁速率

PCA9550 LED闪烁器可在I²C总线和SMBus应用中闪烁LED，而在这些应用中有必要限制总线流量或释放I²C主机（MCU、MPU、DSP、芯片组等）定时器。该器件的独特之处是集成内部振荡器，提供两种可编程闪烁速率。若要使用普通的I/O扩展器（如PCF8574或PCA9554）闪烁LED，则总线主机必须发送重复命令，开启和关闭LED。这可极大地增加I²C总线上的流量，并耗尽主机的其中一个定时器。而PCA9550 LED闪烁器仅需初始设置命令便可编程闪烁速率1和闪烁速率2（如频率和占空比）。在此之后，只需总线主机发出一条命令，便可开启或关闭各开漏输出，或者在闪烁速率1或闪烁速率2之间循环切换。最大输出吸电流为每位25 mA，以及每封装50 mA。

任何未用于控制LED的位都可用作通用并行输入/输出(GPIO)扩展。

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（全零），使位变为高电平（LED关闭）。

PCA9550上的一个硬件地址针脚允许在一条总线上运行两个器件。

PCA9550: 产品结构框图
Outline 3d SOT505-1
数据手册 (1)
名称/描述Modified Date
2-bit I2C-bus LED driver with programmable blink rates (REV 5.0) PDF (150.0 kB) PCA9550 [English]13 Oct 2008
应用说明 (3)
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
I2C 2002-1A Evaluation Board (REV 2.0) PDF (2.2 MB) AN10146 [English]26 Feb 2003
I2C Devices for LED Display Control (REV 1.0) PDF (1.0 MB) AN264 [English]22 Jul 2002
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
Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 (REV 1.0) PDF (1.8 MB) 75016531 [English]01 Jul 2008
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 blinking with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED blinkers PCA9550/51/52/53 (REV 1.0) PDF (219.0 kB) 75016021 [English]01 Jun 2007
封装信息 (2)
名称/描述Modified Date
plastic thin shrink small outline package; 8 leads; body width 3 mm (REV 1.0) PDF (240.0 kB) SOT505-1 [English]08 Feb 2016
plastic small outline package; 8 leads; body width 3.9 mm (REV 1.0) PDF (244.0 kB) SOT96-1 [English]08 Feb 2016
包装 (2)
名称/描述Modified Date
SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 2.0) PDF (232.0 kB) SOT96-1_118 [English]19 Apr 2013
TSSOP8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (214.0 kB) SOT505-1_118 [English]15 Apr 2013
报告或演示文稿 (1)
名称/描述Modified Date
design_con_2003_tecforum_i2c_b_1 (REV 0.1) PDF (4.2 MB) DESIGN_CON_2003_TECFORUM_I2C_B_1 [English]27 Jan 2003
支持信息 (4)
名称/描述Modified Date
Reflow Soldering Profile (REV 1.0) PDF (34.0 kB) REFLOW_SOLDERING_PROFILE [English]30 Sep 2013
Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE [English]30 Sep 2013
Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW [English]08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE [English]08 Oct 2009
IBIS
订购信息
型号状态Package versionOperating Temperature (Cel)PWMsReset input pinI2C-bus (kHz)Operating voltage (VDC)Max Sink Current per bit (mA)No of AddressesMax Sink Current, per package (mA)Number of bits
PCA9550DActiveSOT96-1-40~852 (40 Hz to 6.4 sec)yes4002.3~5.5252502
PCA9550DPActiveSOT505-1-40~852 (40 Hz to 6.4 sec)yes4002.3~5.5252502
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
PCA9550DSOT96-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE		Reel 13" Q1/T1ActivePCA9550D,118 (9352 728 82118)PCA9550PCA9550Dweek 5, 20050.02.05E811
Bulk PackActivePCA9550D,112 (9352 728 82112)PCA9550PCA9550Dweek 5, 20050.02.05E811
PCA9550DPSOT505-1Reflow_Soldering_ProfileReel 13" Q1/T1ActivePCA9550DP,118 (9352 728 81118)9550PCA9550DPweek 12, 20050.02.05E811
2-bit I2C-bus LED driver with programmable blink rates PCA9550
Level shifting techniques in I2C-bus design pca9685pw
I2C 2002-1A Evaluation Board lm75a
I2C Devices for LED Display Control PCA9553
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
Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 lm75a
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... PMEG6010CE_AUTOMOTIVE
LED blinking with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED blinkers PCA9550/51/52/53 PCA9553
design_con_2003_tecforum_i2c_b_1 lm75a
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
PCA9550 IBIS model PCA9550DP
plastic small outline package; 8 leads; body width 3.9 mm CBT3306_Q100
Footprint for reflow soldering NPIC6C596A_Q100
Footprint for wave soldering NPIC6C596A_Q100
SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... CBT3306_Q100
plastic thin shrink small outline package; 8 leads; body width 3 mm pesd5v0l7bas
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
TSSOP8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... pesd5v0l7bas
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