Power adapter and DC-DC converter having acoustic transformer

• US 20070210724A1
• Filed: 05/25/2006
• Published: 09/13/2007
• Est. Priority Date: 03/09/2006
• Status: Abandoned Application

• Current Assignee: Avago Technologies Wireless IP Singapore Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies Wireless IP Singapore Pte Limited (Broadcom, Inc.)
• Inventors: Frank, Michael, Ruby, Richard, Unkrich, Mark
• Application Number:
  US11/440,874
• Publication Number:
  US 20070210724A1
• Time in Patent Office: Days
• US Class Current: 315/209.R
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

An integrated power adapter, a portable electronic device with an integrated power adapter, and multichip modules are described.

Claims

1. A portable electronic device, comprising:

an integrated power adapter operative to convert alternating current (AC) power to a direct current (DC) power, the integrated power adapter further comprising;

an acoustic isolation transformer.

2. A portable electronic device as recited in claim 1, wherein the acoustic isolation transformer includes a bulk acoustic resonator.

3. A portable electronic device as recited in claim 1, wherein the acoustic isolation transformer includes a stack of film piezoelectric material.

4. A portable electronic device as recited in claim 1, wherein the portable electronic device includes one or more of a mobile telephone;

a personal digital assistant (PDA);

a portable computer;

a portable video device;

a portable music device;

a portable radio transceiver;

a pager;

or a digital camera;

or a video recorder;

or a portable global positioning system (GPS) device.

5. A portable electronic device as recited in claim 2, wherein the acoustic transformer further comprises lead zirconium titanate (PZT) piezoelectric material, or aluminum nitride (AlN) piezoelectric material, or zinc oxide (ZnO) piezoelectric material.

6. A portable electronic device as recited in claim 1, further comprising an integrated electrical connector adapted to connect the integrated power adapter to the AC power source.

7. A portable electronic device as recited in claim 6, wherein the integrated electrical connector is a prong connector adapted to connect to a wall outlet.

8. A portable electronic device as recited in claim 6, wherein the integrated electrical connector is adapted to connect to a complementary connector, which is connected to a prong connector adapted to connect to a wall outlet.

9. A portable electronic device as recited in claim 1, further comprising an integrated power module, which comprises the integrated power adapter and a battery.

10. A portable electronic device as recited in claim 1, wherein the power adapter is a multi-chip module.

11. A portable electronic device as recited in claim 9, wherein the integrated power adapter is a multichip module.

12. An integrated power module, comprising:

a battery;

an integrated power adapter connected to the battery and adapted to convert alternating current (AC) voltage to a direct current (DC) voltage, the integrated power adapter further comprising;

an acoustic isolation transformer.

13. An integrated power module as recited in claim 12, wherein the acoustic isolation transformer includes a bulk acoustic resonator.

14. An integrated power module as recited in claim 12, wherein the acoustic isolation transformer includes a stack of film piezoelectric material.

15. An integrated power module as recited in claim 12, further comprising a charging indicator.

16. An integrated power module as recited in claim 12, further comprising an integrated electrical connector adapted to connect the integrated battery charger to the AC source.

17. An integrated power module as recited in claim 12, wherein the integrated electrical connector is a prong connector adapted to connect to a wall outlet.

18. An integrated power module as recited in claim 12, wherein the power adapter is a multi-chip module (MCM).

19. An integrated power module as recited in claim 12, wherein the acoustic transformer further comprises lead zirconium titanate (PZT) piezoelectric material, or aluminum nitride (AlN) piezoelectric material, or zinc oxide (ZnO) piezoelectric material.

20. An integrated power adapter, comprising:

a multi-chip module (MCM) having a substrate;

an AC-DC converter;

a DC-DC converter, the power adapter having components disposed in the substrate or over a surface of the substrate, or both, and being adapted to convert alternating current (AC) voltage to a direct current (DC) voltage, the power adapter further comprising;

an acoustic transformer.

21. An integrated power adapter as recited in claim 20, wherein the acoustic transformer includes a bulk acoustic resonator.

22. An integrated power adapter as recited in claim 20, wherein the acoustic transformer includes a stack of piezoelectric material.

23. An integrated power adapter as recited in claim 20, wherein the acoustic transformer is an acoustic isolation transformer.

24. An integrated power adapter as recited in claim 20, wherein the acoustic transformer further comprises lead zirconium titanate (PZT) piezoelectric material, or aluminum nitride (AlN) piezoelectric material, or zinc oxide (ZnO) piezoelectric material.

25. An integrated power adapter as recited in claim 20, wherein the AC-DC converter is disposed over the substrate.

26. An integrated power adapter as recited in claim 20, wherein the AC-DC converter is separate from and electrically connected to the MCM.

27. An integrated power adapter as recited in claim 20, wherein the DC-DC converter comprises components disposed in the substrate or over a surface of the substrate, or both.

28. An integrated power adapter as recited in claim 20, wherein the DC-DC converter circuit is an isolated DC-DC converter circuit.

29. An integrated power adapter as recited in claim 20, wherein the DC-DC converter circuit is not an isolated DC-DC converter circuit.

30. An integrated power adapter as recited in claim 20, wherein the DC-DC converter circuit further comprises:

a transformer driver;

an output rectifier circuit;

a voltage error signal circuit; and

a switching regulator circuit.

31. An integrated power adapter as recited in claim 29, wherein the voltage error signal circuit and the switching regulator circuit are implemented in a common die.

32. An integrated power adapter as recited in claim 29, wherein the transformer driver;

the output rectifier circuit;

the voltage error signal circuit; and

the switching regulator circuit are implemented in a common die.

33. A multi-chip module (MCM), comprising:

a substrate; and

a DC-DC converter having components disposed in the substrate or over a surface of the substrate, or both, and adapted to convert an input direct current (DC) voltage into an output DC voltage, the DC-DC converter further comprising;

an acoustic transformer.

34. An MCM as recited in claim 33, wherein the acoustic transformer includes a bulk acoustic resonator.

35. An MCM as recited in claim 33, wherein the acoustic transformer includes a stack of piezoelectric material.

36. An MCM as recited in claim 33, wherein the acoustic transformer is an acoustic isolation transformer.

37. An MCM as recited in claim 33, wherein the acoustic transformer further comprises lead zirconium titanate (PZT) piezoelectric material, or aluminum nitride (AlN) piezoelectric material, or zinc oxide (ZnO) piezoelectric material.

38. An MCM as recited in claim 33, wherein the DC-DC converter is an isolated DC-DC converter.

39. An MCM as recited in claim 33, wherein the DC-DC converter is not an isolated DC-DC converter.

40. An MCM as recited in claim 33, wherein the DC-DC converter further comprises:

a transformer driver;

an output rectifier;

a voltage error signal circuit; and

a switching regulator circuit.

41. An MCM as recited in claim 39, wherein the DC-DC converter further comprises:

a transformer driver;

an output rectifier;

a voltage error signal circuit; and

a switching regulator circuit.

42. An MCM as recited in claim 41, wherein the voltage error signal circuit and the switching regulator circuit are implemented in a common die.

43. An MCM as recited in claim 41, wherein the transformer driver, the output rectifier circuit, the voltage error signal circuit, and the switching regulator circuit are implemented in a common die.