输入是+12V,要求输出是0到-8V可调,输出电流正常工作200mA,最大400mA,在TI网站上搜了一遍没有满足要求的芯片,请高手推荐一款电源方案,要求可调节方式简单最好用单电阻调节(但不强制要求)。多谢!
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楼主,开关类的电源芯片,都是通过FB引脚电压与内部Vref电压比较,输出电压最低只能低到Vref。而Vref不可能达到0,所以没有办法实现0到8V可调,最多是从Vref到8V可调,然后尽量选取Vref低的芯片。