DC VOLTAGE STABILISER Russian patent published in 2015 - IPC H02M3/156 G05F1/613 

FIELD: electricity.

SUBSTANCE: direct-current voltage converter comprises control field-effect transistor, which gate is shunted by parallel circuit from counterconnected first diode and first resistor while its drain is connected to anode connection point of switching diode and the first output of choke, which second output is connected to the first input pin joined to source of the control field-effect transistor and the first output pin connected through output capacitor to cathode connection point of switching diode, the second output pin and the first output pin of the output voltage divider, which second output is connected to the first output pin meanwhile the midpoint is connected to measuring input of the control unit, which common leg is connected to the first output pin, emitter follower, which output pin is connected to the first output of the second resistor. The circuit is featured by introduction of a coupling capacitor connected between the second output of the second resistor and gate of the field-effect transistor, the first transistor with load resistor in the collector circuit and auxiliary capacitor connected between outputs of the collector and emitter of the first transistor, which base is connected to output pin of the control unit, emitter is connected to the first output pin while collector - to input pin of the emitter follower. At that in the suggested device the control unit may consist, for example, of pulse generator, which output is coupled to input of saw-tooth voltage shaping unit and to the first input of comparator circuit, which second input is coupled to output of saw-tooth voltage shaping unit and its third input is coupled to output of feedback amplifier, which input is connected to input pin of the control unit and its second input is connected to output of the reference element. In operating mode at large pulse ratio of control voltage at the gate of field-effect transistor (low duration of gating pulses) due to introduction of an auxiliary capacitor the control field-effect transistor starts operation in linear mode limiting reduction in duration of control voltage thus preventing loss in stability of regulation by DC voltage stabiliser.

EFFECT: reliability improvement.

3 cl, 3 dwg