Apparatus for improving the effective performance of a power source and associated methods

Patent metadata

Field	Value
Publication number	US-11646754-B2
Application number	US-202117364525-A
Country	US
Kind code	B2
Filing date	Jun 30, 2021
Priority date	Jun 5, 2019
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

An apparatus includes a power management circuit to receive an input voltage and to generate and provide a first output voltage to an energy storage device. The power management circuit further generates and provides a second output voltage to a load. The first output voltage is greater than the input voltage, and the second output voltage is smaller than the first output voltage. The apparatus further includes a monitor circuit to monitor the first output voltage and to provide a signal to the load to indicate when the load may perform an operation.

First claim

The invention claimed is:

1. An apparatus, comprising:
an energy storage circuit;
a power management circuit to receive an input voltage and to provide a first output voltage to the energy storage circuit, wherein the first output voltage is greater than the input voltage; and
a load circuit coupled to the power management circuit to receive a second output voltage of the power management circuit,
wherein the second output voltage is smaller than the first output voltage, and
wherein in response to an input signal the load circuit performs a burst operation.

2. The apparatus according to claim 1 , wherein the energy storage circuit comprises a capacitor.

3. The apparatus according to claim 1 , further comprising a battery coupled to the power management circuit, wherein the battery provides the input voltage to the power management circuit.

4. The apparatus according to claim 3 , wherein the power management circuit improves an effective performance of the battery.

5. The apparatus according to claim 1 , further comprising a monitor circuit coupled to monitor the first output voltage and to provide the input signal to the load circuit.

6. The apparatus according to claim 1 , wherein the load circuit comprises transmit (TX) circuitry.

7. The apparatus according to claim 6 , wherein the TX circuitry asserts a request (REQ) signal to the monitor circuit when the TX circuitry seeks to perform the burst operation.

8. The apparatus according to claim 7 , wherein the monitor circuit is powered down until the REQ signal is asserted.

9. The apparatus according to claim 5 , wherein the monitor circuit comprises a comparator to compare the first output voltage with a reference voltage.

10. An apparatus, comprising:
a power management circuit to receive an input voltage and to boost the input voltage to generate and provide a storage voltage to an energy storage circuit, the power management circuit to further convert the storage voltage to a supply voltage provided to a load circuit, wherein the storage voltage is greater than the input voltage, and wherein the supply voltage is smaller than the storage voltage; and
a monitor circuit to monitor the storage voltage and to provide a signal to the load circuit to indicate when the load circuit may perform a burst operation.

11. The apparatus according to claim 10 , wherein the load circuit comprises transmit (TX) circuitry.

12. The apparatus according to claim 10 , further comprising a battery to provide the input voltage, wherein the monitor circuit provides the signal to the load circuit to prevent the first output voltage decreasing below a level that would prevent performing the burst operation.

13. The apparatus according to claim 10 , wherein the power management circuit comprises a boost converter to boost the input voltage to the storage voltage, and wherein the power management circuit further comprises a buck converter to convert the storage voltage to the supply voltage.

14. The apparatus according to claim 10 , further comprising a battery coupled to the power management circuit to provide the input voltage to the power management circuit, wherein the power management circuit improves an effective performance of the battery.

15. A method of supplying power to a load, the method comprising:
receiving an input voltage in a power management circuit and generating a first output voltage greater than the input voltage;
providing the first output voltage to an energy storage circuit;
generating, using the power management circuit, a second output voltage smaller than the first output voltage; and
receiving in a load circuit the second output voltage, and in response to an input signal of the load circuit, performing a burst operation.

16. The method according to claim 15 , wherein the energy storage circuit comprises a capacitor.

17. The method according to claim 15 , wherein the load circuit comprises transmit (TX) circuitry.

18. The method according to claim 15 , further comprising asserting a request (REQ) signal when the TX circuitry seeks to perform the burst operation.

19. The method according to claim 15 , further comprising monitoring the first output voltage to generate the input signal of the load circuit.

20. The method according to claim 15 , wherein receiving the input voltage comprises receiving a battery voltage, and wherein using the power management circuit improves an effective performance of the battery.

Assignees

• Silicon Lab Inc

Inventors

• Daigle Clayton
• Tindle Jeffery
• Williamson Matt
• Sonntag Jeffrey L

Classifications

• H02J7/585

  Sequential battery discharge in systems with a plurality of batteries · CPC title

• H02J7/865

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

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H02J7/855 Primary

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · CPC title