TPS61093-Q1的PIN7(FB）端电压偏离资料给出的0.5V，PIN7相连的电阻串为2.2KΩ/51KΩ时，PIN7电压1V，输出19V；电阻串10KΩ/100KΩ时，PIN7电压1.9V，输出电压约18.6V，是否芯片已坏。
输出电流与PIN7电阻网络电流有何关系。
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