US 2018/0294804 A1Published application

Adaptive Control of the Non-Overlap Time of Power Switches

AssigneeDialog Semiconductor (UK) Limited

InventorShafqat Ali

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Abstract

Circuitry for controlling a non-overlap time for a first switch and a second switch is described. Within a first state, the first switch is closed and the second switch is open, and within a second state, the first switch is open and the second switch is closed. The control circuitry has a first auxiliary switch and a second auxiliary switch. The control circuitry determines whether during a transition from the first state to the second state a current has flown through the serial arrangement of the first and second auxiliary switches. The control means adapts a non-overlap time between the first and second control signals for controlling a following transition from the first state to the second state, dependent on whether during said transition between the first and second states a current has flown through the serial arrangement of the first and second auxiliary switches.

Claims20

Dependent claims

1) Control circuitry for controlling a non-overlap time for a first switch and a second switch, which are arranged in series and which are controlled using a first control signal and a second control signal, respectively;

wherein within a first state, the first switch is closed and the second switch is open, and within a second state, the first switch is open and the second switch is closed;
wherein the first switch and the second switch are controlled to be alternatingly in the first state and in the second state;
wherein the control circuitry comprises,
a first auxiliary switch and a second auxiliary switch, which are arranged in series, and which are controlled using a first auxiliary control signal and a second auxiliary control signal, respectively, which are dependent on the first control signal and the second control signal, respectively;
and
control means configured to
determine whether during a transition from the first state to the second state a current has flown through the serial arrangement of the first auxiliary switch and the second auxiliary switch;
and
adapt a non-overlap time between the first control signal and the second control signal for controlling a following transition from the first state to the second state, dependent on whether during said transition from the first state to the second state a current has flown through the serial arrangement of the first auxiliary switch and the second auxiliary switch.

6 more elements

19) A method for adapting a non-overlap time for a first switch and a second switch, which are arranged in series and which are controlled using a first control signal and a second control signal, respectively;

wherein within a first state, the first switch is closed and the second switch is open, and wherein within a second state, the first switch is open and the second switch is closed;
wherein the first switch and the second switch are controlled to be alternatingly in the first state and in the second state;
wherein the method comprises, for a sequence of transitions from the first state to the second state,
determining whether during a current transition from the first state to the second state a current has flown through the serial arrangement of the first auxiliary switch and the second auxiliary switch;
and
adapting a non-overlap time between the first control signal and the second control signal for controlling a following transition from the first state to the second state, dependent on whether during said transition from the first state to the second state a current has flown through the serial arrangement of the first auxiliary switch and the second auxiliary switch.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/813,425Filed 15 Nov 2017
Priority: DE 102017205919.26 Apr 2017
Published: 11 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H03K 5/1515
With two complementary outputs: non-overlapping
H02M 1/38
Details of apparatus for conversion: means for preventing simultaneous conduction of switches
H02M 3/157
With automatic control of output voltage or current, e.g. switching regulators: with digital control
H02M 3/1582
Including plural semiconductor devices as final control devices for a single load: buck-boost converters