Method and device for avoiding abnormal signal oscillation in UVLO test
View Patent ↗A method and device for avoiding abnormal signal oscillation in UVLO test, applied to a power supply module, includes: a voltage detection module ( 301 ) detecting a voltage of an enable terminal of the power supply module during an under voltage lock out UVLO test; a difference calculation module ( 302 ) calculating a difference value between a detected voltage and a voltage trigger threshold of the enable terminal; upon a control module ( 303 ) determining that the difference value is below a preset first threshold, the control module increasing the voltage of the enable terminal during UVLO test via a voltage adjustment module. The application of the above solution of the present application can avoid abnormal signal oscillation in UVLO test.
1. A method for avoiding abnormal signal oscillation in under voltage lock out (UVLO) test, applied to a power supply module, comprising:
detecting a voltage of an enable terminal of the power supply module during the UVLO test;
calculating a difference value between the voltage and a voltage trigger threshold of the enable terminal; and
in response to the difference value being below a preset first threshold, increasing the voltage of the enable terminal during the UVLO test.
2. The method for avoiding abnormal signal oscillation in UVLO test of claim 1 , wherein, the step of in response to the difference value being below the preset first threshold, increasing the voltage of the enable terminal during the UVLO test comprises:
in response to the difference value being below the preset first threshold, increasing the voltage of the enable terminal during the UVLO test by adjusting a voltage divider module connected to the enable terminal.
3. The method for avoiding abnormal signal oscillation in UVLO test of claim 2 , wherein, the voltage divider module comprises a first resistor module and a second resistor module, wherein, a first end of the first resistor module is configured for receiving an input voltage from the power supply module, a second end of the first resistor module is configured to be connected to a first end of the second resistor module and the enable terminal, and a second end of the second resistor module is grounded;
wherein the step of adjusting the voltage divider module connected to the enable terminal comprises:
increasing impedance of the second resistor module.
4. The method for avoiding abnormal signal oscillation in UVLO test of claim 3 , wherein, the first resistor module comprises a first resistor and the second resistor module comprises a first potentiometer.
5. The method for avoiding abnormal signal oscillation in UVLO test of claim 4 , wherein, the step of increasing the impedance of the second resistor module comprises:
moving, by a driving device, a brush of the first potentiometer to increase the impedance of the second resistor module.
6. The method for avoiding abnormal signal oscillation in UVLO test of claim 5 , wherein, the power supply module is a power supply module using MPQ8632GLE-6-Z.
7. The method for avoiding abnormal signal oscillation in UVLO test of claim 2 , wherein, the power supply module is a power supply module using MPQ8632GLE-6-Z.
8. The method for avoiding abnormal signal oscillation in UVLO test of claim 3 , wherein, the power supply module is a power supply module using MPQ8632GLE-6-Z.
9. The method for avoiding abnormal signal oscillation in UVLO test of claim 4 , wherein, the power supply module is a power supply module using MPQ8632GLE-6-Z.
10. The method for avoiding abnormal signal oscillation in UVLO test of claim 1 , wherein, in response to the difference value being below the preset first threshold, the method further comprises: outputting a prompt message.
11. The method for avoiding abnormal signal oscillation in UVLO test of claim 10 , wherein, the power supply module is a power supply module using MPQ8632GLE-6-Z.
12. The method for avoiding abnormal signal oscillation in UVLO test of claim 1 , wherein, the power supply module is a power supply module using MPQ8632GLE-6-Z.