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参数资料
| 型号： | MC34844EP |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 49/62页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR BACKLIGHT 10CH 32QFN |
| 视频文件： | LED backlighting with MC34844 |
| 标准包装： | 490 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 10 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 频率： | 可调节/可选择 |
| 电源电压： | 7 V ~ 28 V |
| 输出电压： | 8 V ~ 60 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 105°C |
| 产品目录页面： | 809 (CN2011-ZH PDF) |
| 配用： | KIT34844EPEVME-ND - BOARD EVAL 10CH MC34844 LED DVR |
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MC34844A
FUNCTIONAL DEVICE OPERATION
I2C BUS SPECIFICATION
charge of controlling LED dimming and enabling the device
every time the PWM is active. For this configuration the EN
pin should be LOW.
I2C BUS SPECIFICATION
The 34844A is a unidirectional device that can only be written by an external control unit. Since the device is a 7 bit address
device (1110110), the control unit needs to follow a specific data transfer format which is shown in Table 26 .
Figure 26. A Complete Data Transfer
For a complete data transfer, please use this format in the
following order:
1. START condition
2. 34844A device address and Write instruction (R/W = 0)
3. First data pack, it corresponds to the 34844A register
that needs to be written. (refer to Table 13 )
4. Second data pack, it corresponds to the value that
should be written to that register. (refer to Table 13 )
5. STOP condition
I 2 C variables description:
? START: this condition occurs when SDA changes from
HIGH to LOW while SCK is HIGH.
? ACKNOWLEDGE: The acknowledge clock pulse is
generated by the Master (Control Unit).
? The transmitter releases the SDA line (HIGH) during the
acknowledge clock pulse.The receiver (34844A) must pull
down the SDA line during this acknowledge pulse to
indicate that the data was correctly written.
? Bits in the first byte: The first seven bits of the first bite
make up the slave address. The eighth bit is the LSB (least
significant bit), which determines the direction of the
message (Write = 0)
For the 34844A device, when an address is sent, each of
the devices in a system compares the first seven bits after
the START condition with its address. If they match, the
device considers itself addressed by the control unit as a
slave-receiver.
? STOP: this condition occurs when SDA changes from
LOW to HIGH while SCK is HIGH
For more information about “I 2 C BUS SPECIFICATION”
please refer to the following link:
http://www.nxp.com/acrobat_download/literature/
9398/39340011.pdf
34844A
Analog Integrated Circuit Device Data
Freescale Semiconductor
49
相关PDF资料 |
PDF描述 |
|---|---|
| MC34845AEPR2 | IC LED DVR BACKLIGHT 6CH 24QFN |
| MC34845BEPR2 | IC LED DVR BACKLIGHT 6CH 24QFN |
| MC34848EPR2 | IC LED DVR BACKLIGHT 8CH 48QFN |
| MC56F8006DEMO-T | BOARD DEMO FOR MC56F8006 DSP |
| MCB1114 | BOARD EVALUATION FOR NXP LPC1114 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34844EPR2 | 功能描述:LED照明驱动器 BACKLIGHT LED DRIVER W/10 CHANNELS 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 |
| MC34845 | 制造商:SPC Multicomp 功能描述:RECEPTACLE FREE 16WAY 制造商:SPC Multicomp 功能描述:RECEPTACLE, FREE, 16WAY |
| MC34845AEP | 功能描述:LED照明驱动器 6-Ch LED Backlt Driver 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 |
| MC34845AEPR2 | 功能描述:LED照明驱动器 6-Ch LED Backlt Driver 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 |
| MC34845BEP | 功能描述:USB 接口集成电路 6-Ch LED Backlt Driver RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
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