收藏本站
NXP Semiconductors
PCA9624
8-bit Fm+ I 2 C-bus 100 mA 40 V LED driver
7.4 Active LOW output enable input
The active LOW output enable (OE) pin, allows to enable or disable all the LED outputs at
the same time.
? When a LOW level is applied to OE pin, all the LED outputs are enabled.
? When a HIGH level is applied to OE pin, all the LED outputs are high-impedance.
The OE pin can be used as a synchronization signal to switch on/off several PCA9624
devices at the same time. This requires an external clock reference that provides blinking
period and the duty cycle.
The OE pin can also be used as an external dimming control signal. The frequency of the
external clock must be high enough not to be seen by the human eye, and the duty cycle
value determines the brightness of the LEDs.
Remark: Do not use OE as an external blinking control signal when internal global
blinking is selected (DMBLNK = 1, MODE2 register) since it will result in an undefined
blinking pattern. Do not use OE as an external dimming control signal when internal global
dimming is selected (DMBLNK = 0, MODE2 register) since it will result in an undefined
dimming pattern.
Remark: During power-down, slow decay of voltage supplies may keep LEDs illuminated.
Consider disabling LED outputs using HIGH level applied to OE pin.
7.5 Power-on reset
When power is applied to V DD , an internal power-on reset holds the PCA9624 in a reset
condition until V DD has reached V POR . At this point, the reset condition is released and the
PCA9624 registers and I 2 C-bus state machine are initialized to their default states (all
zeroes) causing all the channels to be deselected. Thereafter, V DD must be lowered below
0.2 V to reset the device.
7.6 Software reset
The Software Reset Call (SWRST Call) allows all the devices in the I 2 C-bus to be reset to
the power-up state value through a specific formatted I 2 C-bus command. To be performed
correctly, it implies that the I 2 C-bus is functional and that there is no device hanging the
bus.
The SWRST Call function is defined as the following:
1. A START command is sent by the I 2 C-bus master.
2. The reserved SWRST I 2 C-bus address ‘0000 011’ with the R/W bit set to ‘0’ (write) is
sent by the I 2 C-bus master.
3. The PCA9624 device(s) acknowledge(s) after seeing the SWRST Call address
‘0000 0110’ (06h) only. If the R/W bit is set to ‘1’ (read), no acknowledge is returned to
the I 2 C-bus master.
4. Once the SWRST Call address has been sent and acknowledged, the master sends
2 bytes with 2 specific values (SWRST data byte 1 and byte 2):
a. Byte 1 = A5h: the PCA9624 acknowledges this value only. If byte 1 is not equal to
A5h, the PCA9624 does not acknowledge it.
PCA9624
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 6 September 2012
? NXP B.V. 2012. All rights reserved.
13 of 37
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PCA9625D/S911,518 IC LED DRIVER RGBA 32-SOIC
PCA9626BS,518 IC LED DRIVER RGBA 48HVQFN
PCA9632DP2,118 IC LED DRIVER RGBA 10-TSSOP
PCA9633BS,118 IC LED DRIVER RGBA 16-HVQFN
PCA9634D,118 IC LED DRIVER RGBA 20-SOIC
PCA9635PW/S911,118 IC LED DRIVER RGBA 28-TSSOP
PCA9685PW,118 IC LED DRIVER RGBA 28-TSSOP
PCA9922PW,118 IC LED DRIVER LINEAR 16-TSSOP
相关代理商/技术参数
PCA9624PW112 制造商:NXP Semiconductors 功能描述:IC LED DRVR TSSOP
PCA9625D 功能描述:LED照明驱动器 16BT I2C FMTP LED HVCON RST OE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
PCA9625D,512 功能描述:LED照明驱动器 16BT I2C FMTP LED HVCON RST OE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
PCA9625D,518 功能描述:LED照明驱动器 16-bit Fm I2C Bus 100mA 24 V LED drivr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
PCA9625D/S911,518 功能描述:LED照明驱动器 16BT I2C FMTP LED HVCON RST OE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
PCA9625D/S911-T 功能描述:LED照明驱动器 16BT I2C FMTP LED HVCON RST OE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
PCA9625DS911,518 功能描述:LED照明驱动器 16-bit Fm I2C Bus 100mA 24 V LED drivr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
PCA9625D-T 功能描述:LED照明驱动器 16BT I2C FMTP LED HVCON RST OE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N