TH19798B - A switching power supply with pre-charge start. - Google Patents

Abstract

The TV set has an alternating power supply for stabilizing the voltage from the unstable voltage. It consists of a power transformer with a primary winding connected to a pulse at the output point of the controller through the power transistor. In order to reduce the primary charge from the power transistor for collector cutting Router at the end of the pulse The base leg of the power transistor is connected to the output of the regulator through a capacitor and a diode connected in parallel with the capacitor. Capacitors and diodes are connected in series to the control exit point. During a pulse from the regulator, the capacitor is charged to a voltage equal to the forward bias voltage of the dioc. At the end of Pps The capacitor crom voltage provides a negative voltage at the negative voltage on the base leg of the transistor, reducing the main point and rapidly turning off the transistor. Is pre-charged through a resistor connected between the control exit point and Incorrect pressure entry point

Claims (1)

1. A switching power supply consists of An unstable voltage source, a load transistors that connect the source to the load. A capacitor that is connected to the control terminal of the said transistor. A diode connected in parallel with such a capacitor. The source of the control pulse is connected to the control terminal of the aforementioned transistor through such capacitors and For the charge of such a capacitor, the value is determined by the voltage across the diode. 2. The power supply according to claim 1 consists of an inductor connected in series with the capacitor. 3. The power supply according to claim 1 consists of a transformer. That is connected between the aforementioned transistor and the aforementioned load. A shunted secret source maintains a constant trade at at least a certain output voltage by generating a pulse output connected to the power transistor. The power transistor is connected to an inductor which is then connected to the input voltage. The switching power supply has a check entry point that can be activated to maintain the output voltage by adjusting the conductivity of the power transceiver to maintain the output voltage at the specified value. hold A circuit that connects the pulses out to the bass leg of the power transistor. The circuit is composed of a plu-down capacitor connected in series with a ballase. And a diode connected in parallel with a pull-down capacitor, where during a pulse output, the pull-down capacitor is charged at the first polarity up to the voltage specified by the forward voltage. Through a diode to make the transistor conduct current And following the pulse output, the capacitor sends the opposite side to the bass leg of the power transporter. To stop the instantaneous conduction of the current going to the power transistor and the section for pre-charging of the capacitor. Before the first pulse output of the said pulse output 5. TV receiver according to claim 4, where the part is connected to the inrush pressure and the collector. A plu-down charge consists of a resistor connected between the impulse input and the polarity of the pull-down capacitor. 6. The TV receiver according to claim 4 later consists of a power supply regulator in Shuffle power net Where at the checkpoint entry is the fault entry point of the power supply controller which is connected to the output voltage 7. TV receiver of claim 4 where the inductor is the primary winding of the transformer. power And the said examination point 8. The TV receiver of claim 4, in which the checkpoint entry point is connected to the error amplifier, is connected to the secondary winding of the power transformer. And generate pulses in a lighted burst flow with a set threshold that is different between At the regulator will maintain the input pressure Thus, it works in a burst operation. 9. TV receiver according to claim 4, where the part is connected to the unstable voltage and connected to a plu-down capacitor composed of The resistance side connected during the inlet pressure is not maintained. And the polarity of a plu-down capacitor And where the power supply controller has a push-push output state Pull-down capacitors are connected to the push-pull output state 1 0. TV receiver according to claim 9, where the power supply regulator consists of an integrated circuit with a bias terminal for the push output state. - Pool Which is inside the integrated circuit And therefore will not be able to reach 1 1. TV receiver according to claim 9, where the resistor is connected to the output of the push-pool state. Which will be connected to a plu-down capacitor