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[原创]Rohm BD83A04EFV-M内置升压DC/DC转换器的4路白光LED驱动方案

关键词:电源管理 LED驱动器 汽车电子 DC/DC转换器 Rohm BD83A04EFV-M

时间:2022-05-06 15:11:13       来源:中电网

Rohm公司的BD83A04EFV-M是内置MOS用于升压,升压DC/DC转换器的4路白光LED驱动器,非常适用于汽车的高亮度LED驱动.LED引脚最大电压为50V,适用于驱动中等LCD面板.LED调光由PWM信号所控制,可以设定高达20,000: [email protected] Hz.器件还支持模拟调光,和PWM调光组合能容纳更高亮度的范围.DC/DC转换器由升压应用控制,输入工作电压范围从4.5V到48V.器件满足AEC-Q100资质,安全功能支持汽车产品,内置4路电流驱动器用于LED驱动,内置的MOS用于升压,电流模式升压DC/DC转换器,DC/DC转换器振荡频率外部同步功能,LSI保护功能(UVLO, OVP, TSD, OCP).输出LED电流绝对精度为±5.0 [email protected] mA, Ta = -40 °C to +125 °C.DC/DC转换器振荡频率为200 kHz 到 2420 kHz,工作温度-40 °C 到 +125 °C,每路LED最大电流为120mA.采用7.8 mm x 7.6 mm x 1.0 mm HTSSOP-B24封装.主要用在汽车CID(中心信息显示器)屏,导航,仪表盘,HUD(平视显示器)和其它中小型汽车LCD屏.本文介绍了BD83A04EFV-M主要特性和指标,框图和升压应用电路框图, PCB应用电路框图及其外接元件列表, 评估板REFLED002-EVK-001主要特性,电路图,材料清单和PCB设计图.

 

This IC is a white LED driver for LCD backlight. It has MOS for boost and 4 ch current drivers for LED drive, making it ideal for high brightness LED drive. LED pin maximum voltage is 50 V, making it suitable for driving medium LCD panels.

The dimming is controlled by the PWM signal and can be set up to 20,000: [email protected] Hz. It also supports analog dimming and can accommodate even higher brightness ranges by combining with PWM dimming. DC/DC converters can be controlled for boost applications, and the input operating voltage range is 4.5 V t..

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