Using the MAX931 voltage monitoring chip to form a soft-start circuit

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Memory chip

The MAX931 voltage-monitoring chip forms a soft-start circuit that prevents the MAX640 from operating until the input voltage is high enough to ensure a relatively heavy load (load refers to the electronic components at both ends of the power supply connected to the circuit. There should be no load in the circuit Directly connect the two poles of the power supply. This connection is called a short circuit. The commonly used load is a component that consumes power such as resistors, engines, and bulbs. The MAX640 is reliably enabled. An undervoltage comparator can also be used to monitor the output voltage. When the voltage reaches 3V or higher, a Power ok signal L1 and C1 are sent to the system. 2 can filter the switching noise of DC-DC operation so as not to interfere with normal call or data transmission. The operating frequency of the MAX640 is as high as hundreds of kHz. This does not have to worry about its effect on the useful signal.

Using the MAX931 voltage monitoring chip to form a soft-start circuit