ISI222

ISI222 根据电机驱动算法，电机相位可能需要在某种状态（例如高压输出或低压输出）中停留相对较长的时间。特别是，某些空间矢量调制方案可能导致电机相位在几毫秒或更长时间内切换为高电平。偏置驱动器的某些方法（如自举）与这些调制方案不兼容。

ISI222电压调节是隔离式电压转换器要求较低的性能标准之一。在大约 3：5 的负载电流范围内，栅极驱动器的输出电压保持在 ±10% 至 ±1% 以内，而该范围精度相对较低。Σ-Δ调制器的5 V输出需要±1%的电压调节，可通过低压差（LDO）稳压器（如ADP7118、ADP7102或ADP7104）提供。

产生偏置电压的方法

电阻源电荷泵是产生以电机相位为基准的偏置电压的较便宜的方法之一。在图3的示例中，电荷泵产生单个正电源轨。这在基本电机驱动器中可能就足够了;然而，它的耗散操作使其效率非常低。在需要更多电源轨或更高电流的情况下，损耗变得不可接受。

ISI222 

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