Semiconductor device for monitoring a reverse voltage

Patent metadata

Field	Value
Publication number	US-10895589-B2
Application number	US-202016882884-A
Country	US
Kind code	B2
Filing date	May 26, 2020
Priority date	Feb 13, 2017
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A semiconductor device for monitoring a reverse voltage is provided. The semiconductor device includes an intellectual property having an input node and an output node; a passive component connected between the output node and a potential; a monitoring circuit connected to the input node and the output node and powered by a driving power, the monitoring circuit monitoring a difference between an input level at the input node and an output level at the output node to detect a reverse voltage across the intellectual property. The driving power is provided by the output node.

First claim

What is claimed is:

1. A semiconductor device comprising:
a near field communication coil configured to generate data related to a near field communication;
a regulator configured to regulate a source voltage to generate a regulated voltage; and
a reverse voltage monitoring circuit comprising a comparator configured to monitor a voltage level difference between an input node of the regulator and an output node of the regulator;
wherein the reverse voltage monitoring circuit generates a signal to control the regulator based on the voltage level difference.

2. The semiconductor device of claim 1 , further comprising a passive component connected to the comparator, wherein the passive component comprises a resistor or a variable resistor.

3. The semiconductor device of claim 2 , wherein the passive component is connected to a potential, wherein the potential is a ground voltage or a positive voltage.

4. The semiconductor device of claim 1 further comprising an inverter connected to the comparator.

5. The semiconductor device of claim 1 , wherein the input node is configured to receive a voltage from a battery as the source voltage.

6. The semiconductor device of claim 5 , wherein the reverse voltage monitoring circuit is configured to block a reverse current in a case where a voltage at the output node is higher than a voltage at the input node.

7. The semiconductor device of claim 1 , wherein the near field communication coil is connected to the output node of the regulator.

8. A semiconductor device comprising:
a first node having a first voltage level;
a second node having a second voltage level;
a near field communication coil connected to the second node and configured to generate data related to a near field communication; and
a reverse voltage monitoring circuit configured to monitor a difference between the first voltage level and the second voltage level,
wherein the reverse voltage monitoring circuit is further configured to block a reverse current in a case where the second voltage level is higher than the first voltage level.

9. The semiconductor device of claim 8 , further comprising a regulator configured to regulate a voltage at the first node and to provide a regulated voltage to the second node.

10. The semiconductor device of claim 8 , wherein the first node is configured to receive a source power voltage.

11. The semiconductor device of claim 8 , wherein the reverse voltage monitoring circuit comprises a comparator configured to compare the first voltage level with the second voltage level.

12. The semiconductor device of claim 8 , wherein the reverse voltage monitoring circuit comprises an inverter connected to a comparator.

13. The semiconductor device of claim 8 , wherein the reverse voltage monitoring circuit comprises a passive component connected to a comparator.

14. The semiconductor device of claim 8 , wherein the reverse voltage monitoring circuit comprises a driving power input connected to the second node.

15. A mobile device comprising:
a power management integrated circuit configured to manage a source power voltage;
a wireless charging circuit configured to control a level of a voltage received from a wireless charging coil;
a regulator configured to regulate a voltage at an input node to generate a regulated voltage at an output node;
a power amplifier configured to amplify a voltage which is outputted at the output node; and
a reverse voltage monitoring circuit configured to monitor a voltage difference between the input node and the output node and generate a control signal based on the voltage difference.

16. The mobile device of claim 15 , further comprising a near field communication coil connected to the power amplifier and configured to generate first data related to a near field communication.

17. The mobile device of claim 16 , wherein the near field communication coil and the wireless charging coil overlap each other.

18. The mobile device of claim 15 , further, wherein the input node is configured to receive the source power voltage.

19. The mobile device of claim 18 , wherein the reverse voltage monitoring circuit is configured to block a reverse current in a case where the voltage at the output node is higher than the voltage at the input node.

20. The mobile device of claim 15 , wherein the input node and the output node are connected to the reverse voltage monitoring circuit.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Choi Jun-Han
• Kong Tae-Hwang
• Kim Kwang-Ho
• Kim Sang-Ho
• Kim Se-Ki
• Yang Jun-Hyeok
• Lee Sung-Yong
• Lee Yong-Jin

Classifications

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J50/10

  using inductive coupling · CPC title

• G01R19/0084 Primary

  Measuring voltage only · CPC title

• G01R19/14 Primary

  Indicating direction of current; Indicating polarity of voltage · CPC title