TH57809B - Power supply in switch mode - Google Patents

Abstract

When switching The main transistor (Q3) of the power supply using a voltage switch. Zero electric (100) conductive voltage (VR1112) is built into the current sensing resistor (R12) connected in series with the voltage resistor in the current sensing resistor is connected to the terminal junction. Control (base) of the transistor as the comparator (Q2) during the period. Of conductivity as required Of switch chain That main transistor The resistor transistor is turned on when the resistor voltage is detected. The measured current is large enough to open. The comparator transistor output (VGS) is connected to the control junction of the switchgear. Main transistor In order to control the shutdown at any time of the switch chain. Main transistor On a pulse basis Of current one by one A pulse of the resonant voltage (IC6), which is generated at the terminal junction of the primary conduction. Of switch chain The main transistor is connected by means of Capacity with the control endpoint connection Of transistors that are Comparator In order to make the transistors that are Compare always open During any particular pulse Of that resonant voltage, Figure 1.

Claims (1)

1. Power supply in switch mode Where The transmitting voltage source is the input (B +), the transmission conductivity (L1) is connected to the voltage source. The electricity sent to such an input, the capacitance (C6) is connected to the inductance sent to it. To create a resonant circuit The first transistor (Q3) is tuned to produce a pulsed signal in the inductance of the Such output, in connection with the condition (302)