Safe_high_voltage_flasher_or_monitor

Published:2009/7/19 22:51:00 Author:Jessie | From:SeekIC

A high-voltage (85 to 200 V) power supply can be monitored at a remote location safely and with little current drain using this LM3909 circuit. If the 43-kΩ dropping resistor is located at the source end, voltages to the LED and LM3909 are limited to loss than 7 V above ground. A chart outlining operation of this circuit at various voltages appears on the LM3909 data sheet.



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