The NE1101F is a switching power supply control chip with an input voltage range of 4.5V to 40V and an output voltage range of 0V to 40V. Under normal operating conditions, the operating voltage of the NE1101F is usually 5V to 24V. However, the specific voltage requirements may vary depending on the application scenario and design requirements. It is recommended to refer to the electrical characteristics parameters in the data manual of the NE1101F to ensure the correct voltage and current range.
The switching power supply starts to supply power to the chip at a voltage of 16~20V. According to the relevant information, the actual working power supply of the switching power supply is 16 to 20V.