收藏本站
MC34844
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
MC34844 - Functional Block Diagram
Regulators / Power Down
3 Internal Regulators
Protection / Failure Detection
Over-temperature Protection
Over-current Protection
Under-voltage Protection
Over-voltage Protection
LED Open Protection
Logic Control
Optical and Temperature Control
PWM Dimming
Serial Interface Control
Boost
LED Channels
Regulator / Power down
Protection / Failure Detection
Logic Control
LED Channels
Boost
Figure 5. Functional Internal Block Diagram
REGULATORS/ POWER DOWN
The 34844 is designed to operate from input voltages in
the 7.0 to 28 V range. This is stepped down internally by
LDOs to 2.5 V (VDC1 and VDC3) and 6 V (VDC3) for
powering internal circuitry. If the input voltage falls below the
UVLO threshold, the device automatically enters in power
down mode.
Operating Modes:
The device can be operated by the EN pin and/or SDA/
SCK bus lines, resulting in three distinct operation modes:
? Manual mode, there is no I 2 C capability, the bus line pins
must be tied low, and the EN pin controls the ON/OFF
operation.
? SM Bus mode, EN pin must be tied low and the device is
turned ON by any activity on the bus lines. The part shuts
down if the bus lines are held low for more than 27 ms, the
27 ms watchdog timer can be disabled by I 2 C (setting
SETI2C bit high) or tying the EN pin high. In Sleep mode
(EN bit=0) the device reduces the power consumption by
leaving “alive” only the blocks required for I 2 C
communication.
? I 2 C mode, has to be configured by I 2 C communication
(SETI2C bit = 1) right after the IC is turned ON, it prevents
the part from being turned ON/OFF by the bus. Sleep
mode is also present and it is intended to save power, but
still keep the IC prepared to communicate by I 2 C. Turning
the EN pin OFF, the chip enters into a low power mode.
34844
Analog Integrated Circuit Device Data
Freescale Semiconductor
16
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
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
MCB11C14 BOARD EVAL FOR NXP LPC11C14
MCB2470 BOARD EVAL NXP LPC247X SERIES
MCBSTM32EXL BOARD EVALUATION FOR STM32F103ZE
相关代理商/技术参数
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
MC34845BEPR2 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
MC34845CEP 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
MC34845CEPR2 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