US 2026/0229880 A1Published application

Inrush current suppression circuit

AssigneeAnpec Electronics Corporation

InventorsKUN-YI LIN, ZI-PING ZUO

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Abstract

An inrush current suppression circuit includes a switch component, a charging circuit, a switch control circuit and a compensation circuit. A first terminal of the switch component is coupled to an input voltage. A control terminal of the switch component is connected to a control node. The charging circuit outputs a charging current to the control node. The switch control circuit sets a current value of a control current according to an output voltage of a second terminal of the switch component and a ramp voltage, and obtains the control current from the control node. The compensation circuit sets a current value of a compensation current according to a control voltage of the control node and the output voltage, and obtains the compensation current from the ramp voltage or supplies the compensation current to the control node.

Claims16

Dependent claims

An inrush current suppression circuit, comprising:

a switch component, wherein a first terminal of the switch component is coupled to an input voltage, and a control terminal of the switch component is connected to a control node;
a charging circuit connected to the control node and configured to output a charging current to the control node;
a switch control circuit, wherein the switch control circuit is connected to a second terminal and the control terminal of the switch component and coupled to a ramp voltage, configured to set a current value of a control current according to an output voltage of the second terminal of the switch component and the ramp voltage, and configured to obtain the control current from the control node;
and
a compensation circuit, wherein the compensation circuit is connected to the control node and the second terminal of the switch component, connected to a ramp node between the switch control circuit and the ramp voltage, configured to set a current value of a compensation current according to a control voltage of the control node and the output voltage of the second terminal of the switch component, and configured to obtain the compensation current from the ramp node.

2 more elements

An inrush current suppression circuit, comprising:

a switch component, wherein a first terminal of the switch component is coupled to an input voltage, and a control terminal of the switch component is connected to a control node;
a charging circuit connected to the control node and configured to output a charging current to the control node;
a switch control circuit, wherein the switch control circuit is connected to a second terminal and the control terminal of the switch component and coupled to a ramp voltage, configured to set a current value of a control current according to an output voltage of the second terminal of the switch component and the ramp voltage, and configured to obtain the control current from the control node;
and
a compensation circuit, wherein the compensation circuit is connected to the control node and the second terminal of the switch component, configured to set a current value of a compensation current according to a control voltage of the control node and the output voltage of the second terminal of the switch component, and configured to output the compensation current to the control node.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/232,832Filed 9 Jun 2025
Priority: TW 1141039254 Feb 2025
Published: 6 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02H 9/001
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection: limiting speed of change of electric…
H02H 9/002
Limiting speed of change of electric quantities, e.g. soft switching on or off: limiting inrush current on switching on of inductive loads…
H03K 3/037
By the use of logic circuits, with internal or external positive feedback: bistable circuits
H03K 4/06
Generating pulses having essentially a finite slope or stepped portions: having triangular shape