Analog Devices Flyback Converter: I created a non-isolated 5V output circuit using Figure 9 of the LT8315 data sheet as a reference. If you apply a load and operate for a while, the operation will stop midway and the output voltage will drop. Please tell me the cause.

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The Analog Devices Flyback Converter: LT8315 datasheet Figure 9 was used as a reference to create a non-isolated 5V output circuit. If you apply a load and operate it for a while, it will stop working and the output voltage will drop. Please tell me the reason.

power management

Datasheet Figure 9 is a circuit for 12V output, and when the BIAS power supply is taken from the output with 5V output, the BIAS power supply reset voltage 9.5V stops the interrupt operation. For outputs below 10V, it is recommended that the input power be supplied to BIAS with a resistor and a Zener diode.

(Published in June 2021)

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