Overvoltage Protection and Linear Regulator Device Module

• US 20200136379A1
• Filed: 12/27/2019
• Published: 04/30/2020
• Est. Priority Date: 04/15/2016
• Status: Active Grant

• Current Assignee: Littelfuse Semiconductor (Wuxi) Co., Ltd. (Littelfuse Incorporated)
• Original Assignee: Littelfuse Semiconductor (Wuxi) Co., Ltd. (Littelfuse Incorporated)
• Inventors: TO, Teddy C.T., TIAN, Wei hua
• Granted Patent: US 10,998,719 B2
• Time in Patent Office: Days
• CPC Class Codes: G05F 1/56 using semiconductor devices in series with the load as final control devices G05F1/461 takes precedence
• CPC Class Codes: G05F 1/618 using semiconductor devices in series and in parallel with the load as final control devices G05F1/461 takes precedence
• CPC Class Codes: H01L 29/866 Zener diodes
• CPC Class Codes: H02H 9/041 using a short-circuiting device
• CPC Class Codes: H02M 3/07 using capacitors charged and discharged alternately by semiconductor devices with control electrode , e.g. charge pumps

Abstract

An apparatus may include a transient voltage suppression (TVS) device array coupled to a first input terminal and a second input terminal; and a linear regulator module having a pair of inputs connected to a respective pair of outputs of the TVS device array, wherein the TVS device array includes at least one TVS diode is connected between a first output and second output of the pair of outputs to generate a first clamping voltage signal, and wherein the linear regulator module is configured to generate a second clamping voltage signal having a second clamping voltage independent of a first clamping voltage of the first clamping voltage signal received from the TVS device array.

Claims

1. An apparatus, comprising:

a transient voltage suppression (TVS) device array coupled to a first input terminal and a second input terminal; and

a linear regulator module having a pair of inputs connected to a respective pair of outputs of the TVS device array,

wherein the TVS device array includes at least one TVS diode is connected between a first output and second output of the pair of outputs to generate a first clamping voltage signal, and

wherein the linear regulator module is configured to generate a second clamping voltage signal having a second clamping voltage independent of a first clamping voltage of the first clamping voltage signal received from the TVS device array.

2. The apparatus of claim 1, further comprising a charge pump coupled between ground and output voltage of the linear regulator module.

3. The apparatus of claim 1, the linear regulator module further comprising a TVS diode configured to set a maximum clamping voltage for the linear regulator module.

4. The apparatus of claim 3, the linear regulator module further comprising a metal oxide field effect transistor (MOSFET) coupled to an output of the TVS device array, the MOSFET interoperative with the TVS diode to output the second clamping voltage signal at a voltage of 40 V or less.

5. The apparatus of claim 3, wherein a clamping voltage of the TVS diode of the linear regulator module is 40 V or less.

6. The apparatus of claim 1, the TVS device array comprising a plurality of Zener diodes placed at a plurality of conductive nodes in the TVS device array.

7. The apparatus of claim 1, wherein the TVS device array includes a first set of TVS diodes connected in electrical series between the first input terminal and second input terminal, wherein at least one additional set of TVS diodes is connected in electrical series between the first input terminal and second input terminal, and wherein the first set of TVS diodes is arranged in electrical parallel fashion to the at least one additional set of TVS diodes.

8. The apparatus of claim 1, wherein the protection device is configured to dissipate at least 200 W input power.

9. The apparatus of claim 1, further comprising an output DC voltage filter coupled to an output of the linear regulator module.

10. The apparatus of claim 1, wherein the first clamping voltage is 110 V or less.

11. The apparatus of claim 1, the linear regulator module comprising a first linear regulator module, the apparatus further comprising a second linear regulator module connected to an output of the first linear regulator module, the second linear regulator module to output a third clamping voltage signal having a third clamping voltage independent of the second clamping voltage.

12. A method of providing overvoltage protection, comprising:

receiving a voltage pulse in a transient voltage suppression (TVS) device array coupled to a first input terminal and a second input terminal, wherein the TVS device array includes at least one TVS diode is connected between the first input terminal and second input terminal;

outputting a first clamping voltage signal from the TVS device array;

receiving the first clamping voltage signal at a linear regulator module having a pair of inputs connected to a respective pair of outputs of the TVS device array; and

outputting a second clamping voltage signal from the linear regulator module, the second clamping voltage signal having a second clamping voltage less than a first clamping voltage of the first clamping voltage signal.

13. The method of claim 12, further comprising providing a TVS diode in the linear regulator module to set a maximum clamping voltage for the second clamping voltage signal.

14. The method of claim 13, wherein the linear regulator module further comprises a metal oxide field effect transistor (MOSFET) coupled to an output of the TVS array, the MOSFET interoperative with the TVS diode to output the second clamping voltage signal at a voltage of 40 V or less.

15. The method of claim 13, wherein a clamping voltage of the TVS diode of the linear regulator module is 40 V or less.

16. The method of claim 12, the TVS device array comprising a plurality of Zener diodes.

17. The method of claim 12, further comprising:

providing the TVS device array as a first set of TVS diodes connected in electrical series between the first input terminal and second input terminal;

providing at least one additional set of TVS diodes connected in electrical series between the first input terminal and second input terminal; and

arranging the first set of TVS diodes in electrical parallel fashion to the at least one additional set of TVS diodes.

18. The method of claim 12, the linear regulator comprising a first linear regulator module, the method further comprising providing a second linear regulator module connected to an output of the first linear regulator module, and outputting from the second linear regulator module a third clamping voltage signal having a third clamping voltage independent of the second clamping voltage.