Terminal protection network and electronic device

Patent metadata

Field	Value
Publication number	US-12176703-B2
Application number	US-202217920801-A
Country	US
Kind code	B2
Filing date	Mar 4, 2022
Priority date	Mar 4, 2022
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

A terminal protection network, which comprises one or more terminal protection circuits ( 204, 206, 208 ), each having at least two terminals (T 1 , T 2 ) connected respectively to at least two of three terminals (T 1 , T 2 , T 3 ) of a primary component ( 202 ) in the electronic device; and one or more clamping circuits ( 240 _ 1, . . . , 240 _N), each having two terminals (T 1 , T 2 ) connected respectively to the primary component ( 202 ) and a corresponding auxiliary component ( 220 _ 1, . . . , 220 _N) in the electronic device.

First claim

The invention claimed is:

1. An electronic device, comprising:
a control terminal; a first conduction terminal; a second conduction terminal; and one or more auxiliary conduction terminals;
a primary component having three terminals including a first terminal connected to the control terminal, a second terminal connected to the first conduction terminal and a third terminal connected to the second conduction terminal;
one or more auxiliary components, each having three terminals including a first terminal connected to the control terminal, a second terminal connected to the first conduction terminal and a third terminal connected to a corresponding auxiliary conduction terminal;
a terminal protection network for protecting the primary component and the one or more auxiliary components;
the terminal protection network comprises:
one or more terminal protection circuits, each having at least two terminals connected to at least two of three terminals of the primary component respectively; and
one or more clamping circuits, each having a first terminal connected to the second conduction terminal and a second terminal connected to a corresponding auxiliary conduction terminal;

wherein the terminal protection network includes a third terminal protection circuit having a first terminal connected to the first conduction terminal and a second terminal connected to the second conduction terminal;
wherein the third terminal protection circuit comprises:
a second capacitor having a first end connected to the first terminal of the third terminal protection circuit;
a fourth transistor having a drain connected to a second end of the second capacitor;
a fifth transistor having a gate connected to a source of the fourth transistor, a drain connected to the first terminal of the third terminal protection circuit, and a source connected to the second terminal of the third terminal protection circuit;
a sixth diode having an anode connected to the gate of the fifth transistor and a cathode connected to the second terminal of the third terminal protection circuit;
a second resistor having a first end connected to a gate of the fourth transistor and a second end connected to the second terminal of the third terminal protection circuit; and
a plurality of seventh diodes connected in series and including a first member diode having an anode connected to the first terminal of the third terminal protection circuit and a last member diode connected to the first end of the second resistor.

2. The electronic device according to claim 1 , wherein each of the clamping circuits comprises:
a first clamping diode having an anode connected to the first terminal of the clamping circuit and a cathode connected to the second terminal of the clamping circuit; and
a second clamping diode having an anode connected to the second terminal of the clamping circuit and a cathode connected to the first terminal of the clamping circuit.

3. The electronic device according to claim 1 , wherein each of the clamping circuits comprises:
a plurality of first clamping diodes connected in series and including a first member diode having an anode connected to the first terminal of the clamping circuit and a last member diode having a cathode connected to the second terminal of the clamping circuit; and
a plurality of second clamping diodes connected in series and including a first member diode having an anode connected to the second terminal of the clamping circuit and a last member diode having a cathode connected to the first terminal of the clamping circuit.

4. The electronic device according to claim 1 , wherein the terminal protection network includes a first terminal protection circuit having a first terminal connected to the first conduction terminal and a second terminal connected to the control terminal.

5. The electronic device according to claim 4 , wherein the first terminal protection circuit comprises:
a first capacitor having a first end connected to the first terminal of the first terminal protection circuit; and
a plurality of first diodes connected in series and including a first member diode having an anode connected to a second end of the first capacitor and a last member diode having a cathode connected to the second terminal of the first terminal protection circuit.

6. The electronic device according to claim 1 , wherein the terminal protection network includes a second terminal protection circuit having a first terminal connected to the control terminal and a second terminal connected to the second conduction terminal.

7. The electronic device according to claim 6 , wherein the second terminal protection circuit comprises:
a second transistor having a drain connected to the first terminal of the second terminal protection circuit and a source connected to the second terminal of the second terminal protection circuit;
a first resistor having a first end connected to a gate of the second transistor and a second end connected to the second terminal of the second terminal protection circuit; and
a plurality of third diodes connected in series and including a first member diode having an anode connected to the first terminal of the second terminal protection circuit and a last member diode having a cathode connected to the gate of the second transistor.

8. The electronic device according to claim 1 , wherein the primary component, the one or more auxiliary components, the one or more clamping circuits and the terminal protection network are integrated into an integrated circuit (IC) chip.

9. An electronic device, comprising:
a control terminal; a first conduction terminal; a second conduction terminal; and one or more auxiliary conduction terminals;
a primary component having three terminals including a first terminal connected to the control terminal, a second terminal connected to the first conduction terminal and a third terminal connected to the second conduction terminal;
one or more auxiliary components, each having three terminals including a first terminal connected to the control terminal, a second terminal connected to the first conduction terminal and a third terminal connected to a corresponding auxiliary conduction terminal;
a terminal protection network for protecting the primary component and the one or more auxiliary components;
the terminal protection network comprises:
one or more terminal protection circuits, each having at least two terminals connected to at least two of three terminals of the primary component respectively; and
one or more clamping circuits, each having a first terminal connected to the second conduction terminal and a second terminal connected to a corresponding auxiliary conduction terminal;

wherein the electronic device further comprises a coupling capacitor having a first end connected to the first conduction terminal; and wherein the terminal protection network includes:
a first terminal protection circuit having a first terminal connected to a second end of the coupling capacitor and a second terminal connected to the control terminal;
a second terminal protection circuit having a first terminal connected to the control terminal and a second terminal connected to the second conduction terminal; and
a third terminal protection circuit having a first terminal connected to the first conduction terminal, a second terminal connected to the second conduction terminal and a third terminal connected to the second end of the coupling capacitor.

10. The electronic device according to claim 9 , wherein the first terminal protection circuit comprises a plurality of first diodes connected in series and including a first member diode having an anode connected to the first termina

Assignees

• Innoscience Suzhou Semiconductor Co Ltd

Inventors

• Lin Yiming
• Sheng Jianjian

Classifications

• H10D89/911

  using passive elements as protective elements · CPC title

• H10D89/811

  using FETs as protective elements · CPC title

• H10D89/611

  using diodes as protective elements · CPC title

• H02H9/046 Primary

  responsive to excess voltage appearing at terminals of integrated circuits · CPC title

• H02H9/04 Primary

  responsive to excess voltage (lightning arrestors H01C7/12, H01C8/04, H01G9/18, H01T) · CPC title