Integrated circuit, motor component and application device having the motor component

Patent metadata

Field	Value
Publication number	US-10075108-B2
Application number	US-201615230931-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Aug 8, 2014
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

An integrated circuit, a motor component including the integrated circuit and an application device having the motor component are provided according to embodiments of the present disclosure. The integrated circuit includes a housing, an integrated circuit die arranged inside the housing and multiple pins extended out from the housing. The integrated circuit die has a conductive back plate and an electronic circuit arranged on the conductive back plate. The multiple pins include an input pin and an output pin, each of the multiple pins has a lead frame inside the housing. And the conductive back plate is fixed to the lead frame of at least one ungrounded pin of the multiple pins in a manner of electrical insulation, thereby avoiding an short circuit for the integrated circuit due to an electrical connection between the conductive back plate and the lead frame fixed to the conductive back plate.

First claim

The invention claimed is:

1. An integrated circuit comprising:
a housing,
an integrated circuit die arranged inside the housing, and
a plurality of pins extended out from the housing, wherein the integrated circuit die comprises a conductive back plate and an electronic circuit arranged on the conductive back plate, each of the plurality of pins has a lead frame inside the housing, the plurality of pins comprise at least one output pin and the conductive back plate is fixed to the lead frame of the at least one output pin of the plurality of pins in a manner of electrical insulation.

2. The integrated circuit according to claim 1 , wherein the plurality of pins further comprise at least one input pin.

3. The integrated circuit according to claim 1 , wherein the conductive back plate is fixed to the lead frame of at least one of the plurality of pins in the manner of electrical insulation by a non-conductive adhesive.

4. The integrated circuit according to claim 1 , wherein the electronic circuit has a floating ground electrically connected to the conductive back plate.

5. The integrated circuit according to claim 4 , wherein the conductive back plate is a substrate layer and the floating ground is electrically connected to the semiconductor chip.

6. The integrated circuit according to claim 4 , wherein the conductive back plate comprises a substrate layer and a metal layer arranged on a side of the substrate layer away from the electronic circuit, and the floating ground is electrically connected to the metal layer.

7. The integrated circuit according to claim 1 , wherein the electronic circuit comprises a magnetic field detection circuit configured to detect an external magnetic field and generate magnetic field detection information corresponding to the external magnetic field.

8. The integrated circuit according to claim 7 , wherein the plurality of pins comprises a power supply input pin configured to connect an external power supply;
the electronic circuit further comprises a rectifying circuit connected to the power supply input pin, the rectifying circuit has a first voltage output terminal and a second voltage output terminal, an output voltage of the first voltage output terminal is greater than an output voltage of the second voltage output terminal, and the second voltage output terminal is a floating ground.

9. The integrated circuit according to claim 8 , wherein the electronic circuit further comprises an output control circuit connected to the rectifying circuit, the output control circuit is configured to enable, at least based on the magnetic field detection information, the integrated circuit to operate in at least one of a first state in which a load current flows outputted from an output pin of the plurality of pins and a second state in which a load current flows received by the output pin of the plurality of pins.

10. The integrated circuit according to claim 9 , wherein the output control circuit is configured to enable, at least based on the magnetic field detection information, the integrated circuit to operate in one of the first state in which a load current flows outputted from the output pin and the second state in which a load current flows received by the output pin which are switched with each other.

11. The integrated circuit according to claim 9 , wherein the power supply input pin is configured to connect an external AC power supply, the output control circuit is configured to enable, based on the magnetic field detection information and a polarity of the AC power supply, the integrated circuit to operate in at least one of the first state in which a load current flows outputted from the output pin and the second state in which a load current flows received by the output pin.

12. The integrated circuit according to claim 9 , wherein the output control circuit comprises a first switch and a second switch, the first switch is connected to the output pin in a first current path, the second switch is connected to the output pin in a second current path having a direction opposite to a direction of the first current path, and the first switch and the second switch are selectively turned on based on the magnetic field detection information.

13. The integrated circuit according to claim 9 , wherein the output control circuit has a first current path in which a current flows outputted from the output pin, a second current path in which a current flows received by the output pin, and a switch connected in one of the first current path and the second current path, the switch is controlled, based on the magnetic field detection information outputted by the magnetic field detection circuit, to enable the first current path and the second current path to be selectively turned on.

14. The integrated circuit according to claim 13 , wherein the other one of the first current path and the second current path is provided with no switch.

15. A motor component comprising a motor and a motor-drive circuit, wherein the motor-drive circuit comprises the integrated circuit according to claim 1 .

16. An application device having the motor component according to claim 15 .

17. The application device according to claim 16 , wherein the application device is a pump, a fan, a household appliance or a vehicle.

Assignees

• Johnson Electric Sa

Inventors

• Sun Chi Ping
• Wong Ken
• Yeung Shing Hin
• Huang Shu Juan
• Jiang Yun Long
• Qian Gang
• Li Yue
• Liu Bao Ting
• Wang En Hui
• Xin Fei
• Yang Xiu Wen
• Liu li sheng
• Cui yan yun

Classifications

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02P7/05

  by means of electronic switching · CPC title

• H02P6/20 Primary

  Arrangements for starting (H02P6/08 takes precedence) · CPC title

• H02P6/16 Primary

  Circuit arrangements for detecting position · CPC title

• H02P7/295

  of the kind having one thyristor or the like in series with the power supply and the motor · CPC title