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| 型号： | PCA9634PW/S911,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 16/38页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER RGBA 20-TSSOP |
| 标准包装： | 2,500 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 8 |
| 内部驱动器： | 两者兼有 |
| 类型 - 主要： | 背光，LED 闪烁器 |
| 类型 - 次要： | RGBA |
| 频率： | 25MHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 输出电压： | 5.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 935285522118 PCA9634PW/S911-T PCA9634PW/S911-T-ND |
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NXP Semiconductors
PCA9634
8-bit Fm+ I 2 C-bus LED driver
7.5 Power-on reset
When power is applied to V DD , an internal power-on reset holds the PCA9634 in a reset
condition until V DD has reached V POR . At this point, the reset condition is released and the
PCA9634 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 speci?c 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 de?ned 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 PCA9634 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 speci?c values (SWRST data byte 1 and byte 2):
a. Byte 1 = A5h: the PCA9634 acknowledges this value only. If byte 1 is not equal to
A5h, the PCA9634 does not acknowledge it.
b. Byte 2 = 5Ah: the PCA9634 acknowledges this value only. If byte 2 is not equal to
5Ah, then the PCA9634 does not acknowledge it.
If more than 2 bytes of data are sent, the PCA9634 does not acknowledge any more.
5. Once the right 2 bytes (SWRST data byte 1 and byte 2 only) have been sent and
correctly acknowledged, the master sends a STOP command to end the SWRST Call:
the PCA9634 then resets to the default value (power-up value) and is ready to be
addressed again within the speci?ed bus free time (t BUF ).
The I 2 C-bus master must interpret a non-acknowledge from the PCA9634 (at any time) as
a ‘SWRST Call Abort’. The PCA9634 does not initiate a reset of its registers. This
happens only when the format of the SWRST Call sequence is not correct.
PCA9634_6
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 12 September 2008
16 of 38
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9635PW | 功能描述:LED照明驱动器 8BIT I2C FM+ TP LED CON 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 |
| PCA9635PW,112 | 功能描述:LED照明驱动器 8BIT I2C FM+ TP LED 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 |
| PCA9635PW,118 | 功能描述:LED照明驱动器 8BIT I2C FM+ TP LED 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 |
| PCA9635PW,118-CUT TAPE | 制造商:NXP 功能描述:PCA9635 Series 5.5 V 25 mA 1 MHz SMT 16 bit Fm+I2C bus LED Driver - TSSOP-28 |
| PCA9635PW/Q900,118 | 功能描述:LED照明驱动器 2.3V-5.5V 10mA 400mW 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 |
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