Surge suppression control circuit
A surge suppression and control circuit technology, applied in the direction of circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of affecting the operating temperature of switching power supply and the large power consumption of switching power supply , large inrush current, etc.
Pending Publication Date: 2022-03-08
XIAMEN PRIMA TECH
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Problems solved by technology
[0002] The power of the switching power supply used in some large electronic products (such as large-sized electronic whiteboards) is above 300W; the BULK capacitor capacity of this high-power switching power supply is relatively large, and the surge current is large at the moment the switching power supply is turned on. A surge suppression module is added to the switching power supply to suppress the surge current of the switching machine. The surge suppression module generally uses a thermistor; This makes the temperature of the thermistor larger, which affects the operating temperature of the switching power supply, and also causes a larger power consumption of the switching power supply.
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[0017] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.
[0018] Such as figure 1 As shown, the present invention discloses a surge suppression control circuit, which is applied in a switching power supply. The switching power supply has a surge suppression module for suppressing surge current, and the surge suppression module includes at least one thermistor. The switching power supply may specifically include a rectification and filtering circuit, a PFC circuit, and an output circuit connected in sequence; the rectification and filtering circuit has a rectification module, a filtering module, and the surge suppression module; the surge suppression module may specifically include parallel thermal Resistor RT501, thermistor RT502, thermistor RT503 and thermistor RT504, the PFC circuit can use the PFC controller model FAN7930.
[0019] In the present invention, the su...
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The invention discloses a surge suppression control circuit, which is applied to a switching power supply and comprises a switching circuit, an optical coupler isolation circuit and a switching control circuit, the switching circuit is connected in parallel with a surge suppression module of the switching power supply, and the on-off of the switching circuit controls whether the surge suppression module is short-circuited or not; the switch control circuit is connected with the switch power supply, and the switch control circuit is connected with the switch circuit through the optical coupler isolation circuit and controls the on-off of the switch circuit. And the switch control circuit controls the switch circuit to be switched on through the optocoupler isolation circuit after the switch power supply works stably. The temperature and power consumption of the switching power supply during normal work can be effectively reduced.
Description
technical field [0001] The invention relates to the field of power circuits, in particular to a surge suppression control circuit. Background technique [0002] The power of the switching power supply used in some large electronic products (such as large-sized electronic whiteboards) is above 300W; the BULK capacitor capacity of this high-power switching power supply is relatively large, and the surge current is large at the moment the switching power supply is turned on. A surge suppression module is added to the switching power supply to suppress the surge current of the switching machine. The surge suppression module generally uses a thermistor; This makes the temperature of the thermistor larger, which affects the operating temperature of the switching power supply, and also causes a larger power consumption of the switching power supply. Contents of the invention [0003] The object of the present invention is to provide a surge suppression control circuit, which can...
Claims
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Login to View More IPC IPC(8): H02H7/122H02H9/02H02M1/32
CPCH02H7/122H02H9/026H02M1/32
Inventor 王利明吴海清薛元
Owner XIAMEN PRIMA TECH