Power supply apparatus and standby power source for controller for vehicle

Patent metadata

Field	Value
Publication number	US-11289939-B2
Application number	US-201817040024-A
Country	US
Kind code	B2
Filing date	Nov 1, 2018
Priority date	Mar 21, 2018
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

The present disclosure provides an electric-power supplying device, wherein the device includes: an isolation driving unit, including a high-voltage-side winding and a low-voltage-side winding, configured to transform a high-voltage input from a high-voltage power supply into a low-voltage output; a high-voltage inputting unit, including a first switch part that is connected in series to the high-voltage-side winding of the isolation driving unit; an output controlling unit, including a first terminal that is connected to the low-voltage-side winding of the isolation driving unit, a second terminal for receiving an output enabling signal from external, and a third terminal for outputting a low-voltage power-supply electric power when the output enabling signal is high; a switch regulating unit, configured to output a switch regulating signal to the first switch part of the high-voltage inputting unit; a high-voltage starting-up unit, including a first end that is connected to the high-voltage power supply, and a second end that is connected to the switch regulating unit, configured to supply a starting-up voltage to the switch regulating unit; and an auxiliary-power-supply unit, including a first end that is coupled to the low-voltage-side winding of the isolation driving unit, and a second end that is connected to the switch regulating unit, configured to supply an electric power to the switch regulating unit.

First claim

What is claimed is:

1. An electric-power supplying device, wherein the electric-power supplying device comprises:
an isolation driving unit, comprising a high-voltage-side winding and a low-voltage-side winding, configured to transform a high-voltage input from a high-voltage power supply into a low-voltage output;
a high-voltage inputting unit, comprising a first switch part that is connected in series to the high-voltage-side winding of the isolation driving unit;
an output controlling unit, comprising a first terminal that is connected to the low-voltage-side winding of the isolation driving unit, a second terminal for receiving an output enabling signal from external, and a third terminal for outputting a low-voltage power-supply electric power when the output enabling signal is high;
a switch regulating unit, configured to output a switch regulating signal to the first switch part of the high-voltage inputting unit;
a high-voltage starting-up unit, comprising a first end that is connected to the high-voltage power supply, and a second end that is connected to the switch regulating unit, configured to supply a starting-up voltage to the switch regulating unit; and
an auxiliary-power-supply unit, comprising a first end that is connected to an auxiliary power supplying winding of the isolation driving unit that is coupled to the low-voltage-side winding, and a second end that is connected to the switch regulating unit, configured to supply an electric power to the switch regulating unit, wherein
the auxiliary-power-supply unit comprises: an auxiliary filtering part, comprising a fourth diode and a second capacitor, configured to filter an auxiliary power supply that is outputted from the auxiliary power supplying winding of the isolation driving unit; and a fifth diode, comprising an anode that is connected to an output end of the auxiliary filtering part, and a cathode that is connected to the switch regulating unit, and
the high-voltage starting-up unit comprises: a third switch part, comprising a source that is connected to the high-voltage power supply via a fourth resistor, a grid that is connected to the high-voltage power supply via a fifth resistor, and a drain that is connected to the switch regulating unit; a first voltage stabilizing part, comprising a cathode that is connected to the grid of the third switch part, and an anode that is connected to a high-voltage-side reference ground; and a charging element, connected to the switch regulating unit at one end, and connected to the anode of the first voltage stabilizing part at the other end.

2. The electric-power supplying device according to claim 1 , wherein the high-voltage inputting unit further comprises:
an absorbing loop, connected in parallel to the high-voltage-side winding of the isolation driving unit; and a sampling element, connected to the switch regulating unit, configured to output a sampled signal; and
the switch regulating unit is configured to, based on the sampled signal from the sampling element, output the switch regulating signal to the high-voltage inputting unit.

3. The electric-power supplying device according to claim 2 , wherein
the absorbing loop comprises a first resistor, a first capacitor and a first diode, and the first resistor is connected in parallel to the first capacitor, and is connected to a cathode of the first diode;
the first switch part comprises a first MOS transistor, and the first MOS transistor has a source that is connected to the high-voltage-side winding of the isolation driving unit, and a grid that is connected to the switch regulating unit, and is configured to receive the switch regulating signal from the switch regulating unit; and
the sampling element comprises a second resistor, and the second resistor is connected to a drain of the first MOS transistor at one end, and connected to a high-voltage-side reference ground at the other end.

4. The electric-power supplying device according to claim 1 , wherein
the output controlling unit comprises:
an output filtering part, connected to the low-voltage-side winding of the isolation driving unit; an outputting part, connected to an output end of the output filtering part, configured to output a low-voltage electric power via a second switch part; and an output-enabling controlling part, configured to, when the output enabling signal is high, cause the second switch part of the outputting part to turn on.

5. The electric-power supplying device according to claim 4 , wherein
the outputting part of the output controlling unit further comprises: a second diode, comprising an anode that is connected to the output end of the output filtering part, and a cathode that is connected to a source of the second switch part; and a third diode and a third resistor, connected in parallel between the source and a grid of the second switch part, a cathode of the third diode being connected to the source of the second switch part; and
the output-enabling controlling part comprises a third switch part, and the third switch part has a grid that is connected to an enabling-signal inputting terminal, a source that is connected to the grid of the second switch part, and a drain that is connected to a low-voltage-side reference ground.

6. The electric-power supplying device according to claim 1 , wherein
the electric-power supplying device further comprises: an isolation-signal unit, comprising a light emitting part and a light receiving part that are coupled; and
an output feedback unit, comprising a first end that is connected to the output controlling unit, and a second end that is connected to the light emitting part, configured to cause the light emitting part to emit light corresponding to an output level of the output controlling unit; and
the light receiving part is connected to the switch regulating unit, and is configured to convert a received light signal into an electric signal and provide the electric signal to the switch regulating unit.

7. The electric-power supplying device according to claim 6 , wherein
the output feedback unit comprises: a voltage dividing part, connected to an output end of an output filtering part of the output controlling unit, configured to divide an output voltage of the output filtering part; a second voltage stabilizing part, configured to use an output voltage of the voltage dividing part as a reference voltage; and a voltage regulating part, configured to regulate a cathode voltage of the second voltage stabilizing part.

8. The electric-power supplying device according to claim 6 , wherein
the switch regulating unit comprises:
a regulating part, comprising: a power-supply inputting port, configured to receive a starting-up voltage and an operating electric power that are supplied to the regulating part; a sampling-signal inputting port, configured to receive a sampled signal from the high-voltage inputting unit; a switch-regulating-signal outputting port, configured to output a switch regulating signal to the high-voltage inputting unit; a feedback-signal inputting port, configured to receive a feedback signal from the light receiving part of the isolation-signal unit; and a switch-frequency configuring port and a compensation controlling port;
a switch-frequency configuring part, connected to the switch-frequency configuring port at one end, and connected to a high-voltage-side reference ground at the other end; and
a compensation controlling part, connected to the compensation controlling port at one end, and connected to the high-voltage-side reference ground at the other end, configured to perform compensation control on the switch regulating unit; and
the light receiving part of the isolation-signal unit is connected to the feedback-signal inputti

Assignees

• Jing Jin Electric Tech Co Ltd

Inventors

• Wan Fuxiang
• Gu Dongping
• Dong Shuanglai
• Gallegos Gabriel

Classifications

• H02M3/155

  using semiconductor devices only · CPC title

• H02M3/33523

  with galvanic isolation between input and output of both the power stage and the feedback loop · CPC title

• H02M1/0009

  Devices or circuits for detecting current in a converter · CPC title

• H02M1/0032

  Control circuits allowing low power mode operation, e.g. in standby mode · CPC title

• H02M1/36 Primary

  Means for starting or stopping converters · CPC title