# US 2019/0165684 A1 · Systems and methods for power converters with self-regulated power supplies

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- Number: US 2019/0165684 A1
- Document ID: US20190165684A1
- Status: Published application
- Kind: A1
- Application number: 16/205,015
- Filed: 2018-11-29
- Published: 2019-05-30
- Earliest claimed: 2017-03-30
- Assignees: On-Bright Electronics (Shanghai) Co., Ltd.
- Applicants: On-Bright Electronics (Shanghai) Co., Ltd.
- Inventors: Liqiang Zhu; Lieyi Fang
- Web page: https://patentgrep.com/patent/US20190165684A1

## CPC

- H02M 3/33515: {with digital control}
- H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M 1/36: Means for starting or stopping converters
- H02M 3/33507: {with automatic control of the output voltage or current, e.g. flyback converters (H02M3/33561, H02M3/33569 take precedence)}
- H02M 1/0006: {Arrangements for supplying an adequate voltage to the control circuit of converters}
- H02M 1/0009: {Devices or circuits for detecting current in a converter}
- 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)

## Abstract

Controller and method for a power converter. For example, the controller includes a first controller terminal coupled to a gate terminal of a transistor. The transistor further includes a drain terminal and a source terminal, and the first controller terminal is at a first voltage as a first function of time. Additionally, the controller includes a second controller terminal coupled to the source terminal. The second controller terminal is at a second voltage as a second function of time. Moreover, the controller includes a third controller terminal coupled to a first resistor terminal of a resistor. The resistor further includes a second resistor terminal, and the third controller terminal is at a third voltage as a third function of time. Also, the controller includes a fourth controller terminal coupled to a first capacitor terminal of a capacitor.

## Claims

### Claim 1

A controller for a power converter, the controller comprising:
a first controller terminal coupled to a gate terminal of a transistor, the transistor further including a drain terminal and a source terminal, the first controller terminal being at a first voltage as a first function of time;
a second controller terminal coupled to the source terminal, the second controller terminal being at a second voltage as a second function of time;
a third controller terminal coupled to a first resistor terminal of a resistor, the resistor further including a second resistor terminal, the third controller terminal being at a third voltage as a third function of time;
a fourth controller terminal coupled to a first capacitor terminal of a capacitor, the capacitor further including a second capacitor terminal, the fourth controller terminal being at a fourth voltage as a fourth function of time;
wherein, from a first time to a second time,
the first voltage remains at a first magnitude;
the second voltage increases from a second magnitude to a third magnitude;
the third voltage remains at a fourth magnitude; and
the fourth voltage increases from a fifth magnitude to a sixth magnitude;
wherein, from the second time to a third time,
the first voltage remains at the first magnitude;
the second voltage remains at the third magnitude;
the third voltage remains at the fourth magnitude; and
the fourth voltage remains at the sixth magnitude;
wherein:
the second time is after the first time; and
the third time is after the second time or is the same as the second time.

### Claim 2 (depends on 1)

The controller of claim 1 wherein the third time is after the second time.

### Claim 3 (depends on 1)

The controller of claim 1 wherein the third time is the same as the second time.

### Claim at position 4

-17. (canceled)

### Claim 18

A method for a power converter, the method comprising:
from a first time to a second time, keeping a first voltage of a first controller terminal at a first magnitude, the first controller terminal being coupled to a gate terminal of a transistor, the transistor further including a drain terminal and a source terminal, the first controller terminal being at the first voltage as a first function of time;
from the first time to the second time, increasing a second voltage of a second controller terminal from a second magnitude to a third magnitude, the second controller terminal being coupled to the source terminal, the second controller terminal being at the second voltage as a second function of time;
from the first time to the second time, keeping the third voltage of a third controller terminal at a fourth magnitude, the third controller terminal being coupled to a first resistor terminal of a resistor, the resistor further including a second resistor terminal, the third controller terminal being at the third voltage as a third function of time;
from the first time to the second time, increasing a fourth voltage of a fourth controller terminal from a fifth magnitude to a sixth magnitude, the fourth controller terminal being coupled to a first capacitor terminal of a capacitor, the capacitor further including a second capacitor terminal, the fourth controller terminal being at the fourth voltage as a fourth function of time;
from the second time to a third time, keeping the first voltage at the first magnitude;
from the second time to the third time, keeping the second voltage at the third magnitude;
from the second time to the third time, keeping the third voltage at the fourth magnitude; and
from the second time to the third time, keeping the fourth voltage at the sixth magnitude;
wherein:
the second time is after the first time; and
the third time is after the second time or is the same as the second time.

### Claim 19 (depends on 18)

The method of claim 18 wherein the third time is after the second time.

### Claim 20 (depends on 18)

The method of claim 18 wherein the third time is the same as the second time.

### Claim at position 8

-26. (canceled)