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您好 TI提供了参考电路,按照下方Piezo Haptic Driver电路修改,不要漏掉元器件(电容)或者变更电路结构(FB那里),重新进行测试。 www.ti.com.cn/.../tidrcf2a.pdf
按照上次建议加入C(bst)电容后,模拟模式下,可以输出方波但是幅度才180V,不到200V,并且修改gain[1:0] , out输出波形幅度也不会变化。
并且有较大纹波。
用万用表测得Vbst = 109V.