Charge pump DC-DC converter comprising solid state batteries

• US 8,610,404 B2
• Filed: 06/01/2007
• Issued: 12/17/2013
• Est. Priority Date: 06/07/2006
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Reefman, Derk, Roozeboom, Freddy, Notten, Petrus H. L., Klootwijk, Johan H.
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): GRANT, ROBERT J
• Application Number:
  US12/303,737
• Publication Number:
  US 20100225278A1
• Time in Patent Office: 2,391 Days
• Field of Search: 320/117, 320/121
• US Class Current: 320/117
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H02M 3/073 Charge pumps of the Schenkel-type
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electronic device is provided which comprises a DC-DC converter. The DC-DC converter comprises at least one solid-state rechargeable battery (B1, B2) for storing energy for the DC-DC conversion and an output capacitor (C2).

Claims

1. Electronic device, comprising:

a DC-DC converter having at least one solid-state rechargeable battery for storing energy for the DC-DC conversion and an output capacitor;

an on-off control unit for controlling the on and off switching of the DC-DC converter; and

a charge watch-dog circuit for keeping the at least one battery at a charge level if the DC-DC converter is switched off by the on-off control unit,

wherein a switching frequency of the DC-DC converter is less than or equal to 1 Hz.

2. Electronic device according to claim 1, wherein the at least one solid-state battery is embodied as a thin-film battery, as a thin-film battery in a pore array being etched into a silicon substrate, as a thin-film battery in a trench array being etched into a silicon substrate;

or as a multi-stack planar battery.

3. Electronic device according to claim 1, wherein the solid-state battery comprises a Li-ion battery.

4. Electronic device according to claim 3, wherein the DC-DC converter comprises a first set of switches which are used for charging the at least one solid-state battery according to a first control signal and a second set of switches which are used for discharging the at least one battery according to a second control signal.

5. Electronic device according to claim 4, wherein the first and second control signal are controlled independently to adjust an output voltage of the DC-DC converter.

6. Integrated circuit, comprising:

a DC-DC converter having at least one solid-state rechargeable battery for storing energy for the DC-DC conversion and an output capacitor;

an on-off control unit for controlling the on and off switching of the DC-DC converter; and

a charge watch-dog circuit for keeping the at least one battery at a charge level if the DC-DC converter is switched off by the on-off control unit,

wherein a switching frequency of the DC-DC converter is less than or equal to 1 Hz.

7. The integrated circuit of claim 6, wherein the at least one solid-state battery is embodied as a thin-film battery, as a thin-film battery in a pore array being etched into a silicon substrate, as a thin-film battery in a trench array being etched into a silicon substrate;

or as a multi-stack planar battery.

8. The integrated circuit of claim 6, wherein the solid-state battery comprises a Li-ion battery.

9. The integrated circuit of claim 8, wherein the DC-DC converter comprises a first set of switches which are used for charging the at least one solid-state battery according to a first control signal and a second set of switches which are used for discharging the at least one battery according to a second control signal.

10. The integrated circuit of claim 9, wherein the first and second control signal are controlled independently to adjust an output voltage of the DC-DC converter.