参数资料
型号: MC34848EP
厂商: Freescale Semiconductor
文件页数: 23/38页
文件大小: 0K
描述: IC LED DVR BACKLIGHT 8CH 48QFN
产品变化通告: AMPD Product Discontinuation 12/Dec/2012
标准包装: 260
恒定电流:
恒定电压:
拓扑: PWM,升压(升压)
输出数: 8
内部驱动器:
类型 - 主要: 背光
频率: 200kHz ~ 1.2MHz
电源电压: 2.6 V ~ 3.6 V
输出电压: 45V
安装类型: 表面贴装
封装/外壳: 48-VFQFN 裸露焊盘
供应商设备封装: 48-QFN-EP(7x7)
包装: 托盘
工作温度: -40°C ~ 85°C
FUNCTIONAL DEVICE OPERATION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
CLK
LS
LS
CLK
SYNC_PWM
PLLC
SYNC_IN
SYNC_OUT
MASTER
LS
CLK
SYNC_PWM
PLLC
SYNC_IN
SYNC_OUT
SLAVE 1
LS
CLK
SYNC_PWM
PLLC
SYNC_IN
SYNC_OUT
SLAVE N
Figure 18. PWM, Boost Clock and Current Synchronization
SCAN
When the SCAN pin is set high, the 34848 enters scan
mode. In this mode, the LED current is set as determined in
the IS register. The number of banks illuminated at any one
PWM FREQUENCY
For master mode the PWM frequency is set by the internal
register while for slave mode it is synchronized to
SYNC_PWM.
time is set using the configuration register. (See Figure 19 )
When the scan pin is set low, the 34848 device goes into
local dimming mode.
34848
Analog Integrated Circuit Device Data
Freescale Semiconductor
23
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