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LCD面板用PWM信号生成器_BD9478F

BD9478F是LCD面板用PWM信号生成器。此IC通过对IC内部产生的三角波与外部DC信号进行比较,生成PWM信号。此PWM信号提供给LED驱动器,对LED调光进行控制。PWM脉冲频率与输入到SYNC端子的外部信号频率同步。当此频率超过规定范围时,则在设定频率内动作以进行保护,并常时向LED驱动器提供稳定的PWM脉冲。

* 本产品是标准级的产品。本产品不建议使用的车载设备。
型号
Status
封装
包装数量
最小独立包装数量
包装形态
RoHS
BD9478F-GE2 供应中 SOP8 2500 2500 Taping Yes
 
特性:
Vin(Min.)[V] 4.5
Vin(Max.)[V] 5.5
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
特点:
  • ・ The signal that the frequency synchronizes with the VSYNC signal is output to PWMOUT.
    ・ The PWM pulse is generated with the DC signal of a triangular wave and PDIM generated with the LCT capacitor.
    ・ When the VSYNC frequency exceeds the stipulated range, it fixes by a set frequency. (fSYNC fPLL=0.36*fPLLtyp , fSYNC> fPLLtyp*2.75 -> fPLL=2.75*fPLLtyp)
    ・ When VSYNC is a no signal input, the self-oscillation is operated by set frequency decided on the CT capacitance.
    ・ When the pulse signal is input to the terminal EXTPWM, it shifts automatically to external PWM mode.
 
 
 
 
技术信息
Application Note

Thermal Resistance