Power converter circuitry

1 . A system comprising:

amplifier circuitry; and

power converter circuitry for receiving a supply voltage and providing an output voltage to the amplifier circuitry, the power converter circuitry comprising:

a control loop for regulating an output voltage of the power converter circuitry in accordance with a target output voltage value; and

controller circuitry configured to adjust the target output voltage value if the supply voltage to the power converter circuitry is within a first predefined threshold of a requested output voltage of the power converter circuitry;

wherein the first predefined threshold is based on a target boost ratio value of the power converter circuitry.

2 . A system according to claim 1 , wherein the controller circuitry is configured to compare an indication of the requested output voltage to an indication of the supply voltage to determine if the supply voltage is within the first predefined threshold of the requested output voltage value.

3 . A system according to claim 2 , wherein the indication of the supply voltage comprises a scaled version of the supply voltage.

4 . A system according to claim 3 , wherein the controller circuitry is configured to select the scaled version of the supply voltage as the target output voltage value if the supply voltage to the power converter circuitry is within the first predefined threshold of the requested output voltage for the power converter circuitry.

5 . A system according to claim 1 , wherein the power converter circuitry is operable in a bypass mode in which a power source of the power converter circuitry is directly coupled to an output of the power converter circuitry.

6 . A system according to claim 5 , wherein the power converter circuitry is configured to operate in the bypass mode if the supply voltage is greater than a first threshold.

7 . A system according to claim 6 , wherein the first threshold is based on the requested output voltage and a predefined margin.

8 . A system according to claim 6 , wherein the power converter circuitry is configured to revert to operation in a non-bypass mode if the supply voltage is equal to or less than a second threshold, wherein the second threshold is lower than the first threshold.

9 . A system according to claim 8 , wherein the second threshold is equal to the requested output voltage.

10 . A system according to claim 1 , wherein the first predefined threshold comprises a fraction or percentage of the supply voltage.

11 . A system according to claim 1 , wherein the power converter circuitry comprises boost converter circuitry.

12 . A system according to claim 11 , wherein the boost converter circuitry is subject to a minimum duty cycle or a minimum boost ratio requirement.

13 . An integrated circuit comprising a system according to claim 1 .

14 . A host device comprising a system according to claim 1 .

15 . A host device according to claim 14 , wherein the host device comprises a laptop, notebook, netbook or tablet computer, a gaming device, a games console, a controller for a games console, a virtual reality (VR) or augmented reality (AR) device, a mobile telephone, a portable audio player, a portable device, an accessory device for use with a laptop, notebook, netbook or tablet computer, a gaming device, a games console a VR or AR device, a mobile telephone, a portable audio player or other portable device.

16 . Power converter circuitry comprising:

a control loop for regulating an output voltage of the power converter circuitry in accordance with a target output voltage value; and

controller circuitry configured to adjust the target output voltage value if a supply voltage to the power converter circuitry is within a first predefined threshold of a requested output voltage of the power converter circuitry;

wherein the first predefined threshold is based on a target boost ratio value of the power converter circuitry.

17 . A system comprising:

amplifier circuitry; and

power converter circuitry for receiving a supply voltage and providing an output voltage to the amplifier circuitry, the power converter circuitry comprising:

a control loop for regulating an output voltage of the power converter circuitry in accordance with a target output voltage value; and

controller circuitry configured to adjust the target output voltage value if the supply voltage to the power converter circuitry is within a first predefined threshold of a requested output voltage of the power converter circuitry,

wherein the controller circuitry is configured to compare an indication of the requested output voltage to an indication of the supply voltage to determine if the supply voltage is within the first predefined threshold of the requested output voltage value,

wherein the indication of the supply voltage comprises a scaled version of the supply voltage, and

wherein the controller circuitry is configured to select the scaled version of the supply voltage as the target output voltage value if the supply voltage to the power converter circuitry is within the first predefined threshold of the requested output voltage for the power converter circuitry.

18 . A system comprising:

amplifier circuitry; and

power converter circuitry for receiving a supply voltage and providing an output voltage to the amplifier circuitry, the power converter circuitry comprising:

a control loop for regulating an output voltage of the power converter circuitry in accordance with a target output voltage value; and

controller circuitry configured to adjust the target output voltage value if the supply voltage to the power converter circuitry is within a first predefined threshold of a requested output voltage of the power converter circuitry,

wherein the power converter circuitry is operable in a bypass mode in which a power source of the power converter circuitry is directly coupled to an output of the power converter circuitry,

wherein the power converter circuitry is configured to operate in the bypass mode if the supply voltage is greater than a first threshold,

wherein the power converter circuitry is configured to revert to operation in a non-bypass mode if the supply voltage is equal to or less than a second threshold, wherein the second threshold is lower than the first threshold, and

wherein the second threshold is equal to the requested output voltage.

19 . Power converter circuitry comprising:

a control loop for regulating an output voltage of the power converter circuitry in accordance with a target output voltage value; and

controller circuitry configured to adjust the target output voltage value if a supply voltage to the power converter circuitry is within a first predefined threshold of a requested output voltage of the power converter circuitry,

wherein the controller circuitry is configured to compare an indication of the requested output voltage to an indication of the supply voltage to determine if the supply voltage is within the first predefined threshold of the requested output voltage value,

wherein the indication of the supply voltage comprises a scaled version of the supply voltage, and

wherein the controller circuitry is configured to select the scaled version of the supply voltage as the target output voltage value if the supply voltage to the power converter circuitry is within the first predefined threshold of the requested output voltage for the power converter circuitry.

20 . Power converter circuitry comprising:

a control loop for regulating an output voltage of the power converter circuitry in accordance with a target output voltage value; and

controller circuitry configured to adjust the target output voltage value if a supply voltage to the power converter circuitry is within a first predefined threshold of a requested output voltage of the power converter circuitry,

wherein the power converter circuitry is operable in a bypass mode in which a power source of the power converter circuitry is directly coupled to an output of the power converter circuitry,

wherein the power converter circuitry is configured to operate in the bypass mode if the supply voltage is greater than a first threshold,

wherein the power converter circuitry is configured to revert to operation in a non-bypass mode if the supply voltage is equal to or less than a second threshold, wherein the second threshold is lower than the first threshold, and

wherein the second threshold is equal to the requested output voltage.