# US 12,184,197 B2 · Adapter and control method

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- Number: US 12,184,197 B2
- Document ID: US12184197B2
- Status: Granted
- Kind: B2
- Application number: 17/858,453
- Filed: 2022-07-06
- Published: 2022-10-20
- Granted: 2024-12-31
- Earliest claimed: 2020-01-07
- Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd
- Inventors: Chen Tian; Jialiang Zhang
- Web page: https://patentgrep.com/patent/US12184197B2

## CPC

- H02M 3/33523: {with galvanic isolation between input and output of both the power stage and the feedback loop}
- H02M 7/217: using semiconductor devices only
- H02J 7/04: Regulation of charging current or voltage
- H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M 1/088: for the simultaneous control of series or parallel connected semiconductor devices
- H02M 1/38: Means for preventing simultaneous conduction of switches
- H02M 3/33592: {having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer}
- H04B 1/04: Circuits
- H04B 1/16: Circuits
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- H02M 3/33573: {Full-bridge at primary side of an isolation transformer}
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H04B: TRANSMISSION

## Abstract

An adapter and a control method are provided. The adapter includes a transformer, at least one first transistor, a control unit, and a first microwave unit. The at least one first transistor is connected to a primary side of the transformer, and is configured to perform a chopping modulation on a voltage input to the transformer. The control unit is configured to output a first control signal. The first microwave unit includes a first transmitting terminal and a first receiving terminal. The first transmitting terminal is configured to convert the first control signal into a first microwave signal and transmit it to the first receiving terminal of the first microwave unit. The first receiving terminal is configured to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off.

## Claims

### Claim 1

An adapter, comprising:
a transformer;
at least one first transistor connected to a primary side of the transformer, and configured to perform a chopping modulation on a voltage input to the transformer;
a control unit configured to output a first control signal; and
a first microwave unit comprising a first transmitting terminal and a first receiving terminal, wherein the first transmitting terminal is connected to the control unit, the first receiving terminal is connected to the at least one first transistor, the first transmitting terminal is configured to convert the first control signal into a first microwave signal and transmit it to the first receiving terminal, and the first receiving terminal is configured to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off.

### Claim 2 (depends on 1)

The adapter according to claim 1, wherein the first microwave unit is further configured to transmit the first control signal to control the at least one first transistor to be turned on or off, and to isolate a parasitic capacitance generated by the at least one first transistor.

### Claim 3 (depends on 1)

The adapter according to claim 1, wherein the adapter also comprises:
at least one second transistor configured to synchronously rectify a direct current output by the transformer, wherein the control unit is also configured to output a second control signal; and
a second microwave unit comprising a second transmitting terminal and a second receiving terminal, wherein the second transmitting terminal is connected to the control unit, the second receiving terminal is connected to the at least one second transistor, the second transmitting terminal is configured to convert the second control signal into a second microwave signal and transmit it to the second receiving terminal, and the second receiving terminal is configured to convert the second microwave signal into the second control signal to control the at least one second transistor to be turned on or off.

### Claim 4 (depends on 3)

The adapter according to claim 3, wherein the second microwave unit is further configured to transmit the second control signal to control the at least one second transistor to be turned on or off, and to isolate a parasitic capacitance generated by the at least one second transistor.

### Claim 5 (depends on 3)

The adapter according to claim 3, wherein the control unit comprises:
a first control unit connected to the first microwave unit, configured to output the first control signal to the first microwave unit, and configured to control an output time of the first control signal; and
a second control unit connected to the second microwave unit, configured to output the second control signal to the second microwave unit, and configured to control an output time of the second control signal.

### Claim 6 (depends on 3)

The adapter according to claim 3, wherein time points of a high voltage and/or a low voltage output of the first control signal and time points of a high voltage and/or a low voltage output of the second control signal are different, so that in response to the at least one first transistor being completely turned off, the at least one second transistor is turned on.

### Claim 7 (depends on 5)

The adapter according to claim 5, wherein the first control unit is further configured to transmit a first synchronization signal to the second control unit, and/or receive a second synchronization signal transmitted by the second control unit;
the second control unit is further configured to transmit the second synchronization signal to the first control unit, and/or receive the first synchronization signal transmitted by the first control unit.

### Claim 8 (depends on 3)

The adapter according to claim 3, wherein the second microwave unit is further configured to provide feedback a voltage value and/or a current value of a direct current output by a secondary side of the transformer to the control unit;
the control unit is further configured to control an output time of a high voltage and/or a low voltage of the control signal according to the voltage value and/or the current value which is fed back.

### Claim 9 (depends on 3)

The adapter according to claim 3, wherein a dead time of the first control signal and/or the second control signal is less than a first threshold.

### Claim 10 (depends on 3)

The adapter according to claim 3, wherein a preset frequency of the first control signal and/or the second control signal is greater than a second threshold.

### Claim 11 (depends on 3)

The adapter according to claim 3, wherein the first microwave unit and/or the second microwave unit comprises an integrated circuit (IC) chip, and an extremely high frequency antenna is packaged in the IC chip.

### Claim 12

A control method, the method applied to an adapter, the adapter comprising a transformer, at least one first transistor, a control unit, and a first microwave unit, the method comprising:
outputting a first control signal by the control unit;
controlling, by the control unit, a first transmitting terminal of the first microwave unit to convert the first control signal into a first microwave signal and transmit it to a first receiving terminal of the first microwave unit; and
controlling, by the control unit, the first receiving terminal to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the controlling, by the control unit, the first receiving terminal to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off comprises:
controlling, by the control unit, the first receiving terminal to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off, and to isolate a parasitic capacitance generated by the at least one first transistor.

### Claim 14 (depends on 12)

The method according to claim 12, wherein the adapter further comprises at least one second transistor and a second microwave unit, and the method further comprises:
outputting a second control signal by the control unit;
controlling, by the control unit, a second transmitting terminal of the second microwave unit to convert the second control signal into a second microwave signal and transmit it to a second receiving terminal; and
controlling, by the control unit, the second receiving terminal to convert the second microwave signal into the second control signal to control the at least one second transistor to be turned on or off, wherein the at least one second transistor is configured to synchronously rectify a direct current output by the transformer.

### Claim 15 (depends on 14)

The method according to claim 14, wherein the controlling, by the control unit, the second receiving terminal to convert the second microwave signal into the second control signal to control the at least one second transistor to be turned on or off comprises:
controlling, by the control unit, the second receiving terminal to convert the second microwave signal into the second control signal to control the at least one second transistor to be turned on or off, and to isolate a parasitic capacitance generated by the at least one second transistor.

### Claim 16 (depends on 14)

The method according to claim 14, wherein the control unit comprises a first control unit and a second control unit;
the outputting the control signal by the control unit comprises:
outputting, by the first control unit, the first control signal to the first microwave unit, and controlling an output time of the first control signal; and
outputting, by the second control unit, the second control signal to the second microwave unit, and controlling an output time of the second control signal.

### Claim 17 (depends on 14)

The method according to claim 14, wherein time points of a high voltage and/or a low voltage output of the first control signal and time points of a high voltage and/or a low voltage output of the second control signal are different, so that in response to the at least one first transistor being completely turned off, the at least one second transistor is turned on.

### Claim 18 (depends on 16)

The method according to claim 16, wherein the method further comprises:
transmitting, by the first control unit, a first synchronization signal to the second control unit, and/or receiving, by the first control unit, a second synchronization signal transmitted by the second control unit;
transmitting, by the second control unit, the second synchronization signal to the first control unit, and/or receiving, by the second control unit, the first synchronization signal transmitted by the first control unit.

### Claim 19 (depends on 14)

The method according to claim 14, wherein the method further comprises:
feeding back, by the second microwave unit, a voltage value and/or a current value of a direct current output by a secondary side of the transformer to the control unit;
controlling, by the control unit, an output time of a high voltage and/or a low voltage of the control signal according to the voltage value and/or the current value which is fed back.

### Claim 20 (depends on 14)

The method according to claim 14, wherein a dead time of the first control signal and/or the second control signal is less than a first threshold.