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制作微功耗、小尺寸3VDC到420VDC升压器,选用哪款芯片?

Other Parts Discussed in Thread: TPS61085

制作如下参数的DC-DC升压器选用哪款芯片?

输入电压 3-3.3V 直流

带载输入电流 小于15mA

空载输入电流 小于1mA

输出电压 420V 直流

负载电阻 5-10M欧姆

输出功率 小于1W

输出纹波 不超过1V

整体尺寸 不超过15mm×15mm×10mm