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Control circuit for a primary controlled switching power supply with increased accuracy of voltage regulation and primary controlled switched mode power supply
Control circuit for a primary controlled switching power supply with increased accuracy of voltage regulation and primary controlled switched mode power supply
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机译:用于具有更高的电压调节精度的主控开关电源的控制电路和主控开关模式电源
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摘要
The circuit has a control output (B) connected with a control input of a primary transistor of a primary controlled switching power supply. A pin (U) is connected with a primary auxiliary winding of a transformer for detecting an auxiliary voltage. The auxiliary voltage is induced depending on a secondary output voltage. An error amplifier (202) compares the detected auxiliary voltage with a reference voltage (Vref2), and amplifies a difference between the detected auxiliary voltage and reference voltage. A feedback branch feeds back output signals of the error amplifier to the pin. An independent claim is also included for a method for controlling a primary switch.
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