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US 9,755,516 B2Granted
Switched mode DCDC converter efficiency improvement by adaptive driver stage
AssigneeTexas Instruments Deutschland GmbH
InventorsHans Schmeller, Erich Bayer
Life of this patent
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Abstract
In a switched mode inductive DCDC converter having a first mode that conducts a first current path through an inductor and through a first switch, and a second mode that conducts a second current path through the inductor and through a second switch, a detecting component detects a parameter. The detecting component outputs a biasing signal extend the turn OFF time of one of the switches in order to decrease a voltage build up on the other switch.
Claims21
A controller for a DC to DC converter comprising:
- the controller operable to generate a control signal to control one of a first field effect transistor couplable to an inductor and a second field effect transistor couplable between the inductor and a reference voltage, the control signal being able to control the one of the first field effect transistor and the second field effect transistor to be in a first state, to control the one of the first field effect transistor and the second field effect transistor to be in a second state, to control the one of first field effect transistor and the second field effect transistor to switch from the first state to the second state and to control the one of the first field effect transistor and the second field effect transistor to switch from the second state to the first state;
- and
- a detecting component operable to detect a parameter associated with one of the first field effect transistor and the second field effect transistor and to output a bias signal based on the detected parameter,
- wherein, in the first state, one of the first field effect transistor and the second field effect transistor is ON and the other of the first field effect transistor and the second field effect transistor is OFF,
- wherein, in the second state, the one of the first field effect transistor and the second field effect transistor is OFF and the other of the first field effect transistor and said second field effect transistor is ON,
- wherein detecting component is arranged with controller such that the bias signal modifies the control signal so as to extend a turn OFF time, and
- wherein the switching time is one of when the first field effect transistor switches from the first state to the second state, when the second field effect transistor switches from the first state to the second state, when the first field effect transistor switches from the second state to the first state, and when the second field effect transistor switches from the second state to the first state.
4 more elements
A method for operating a DC to DC converter comprising:
- generating a control signal to control one of a first field effect transistor coupled to an inductor and a second field effect transistor coupled between the inductor and a reference voltage, the control signal being able to control the one of the first field effect transistor and the second field effect transistor to be in a first state, to control the one of the first field effect transistor and the second field effect transistor to be in a second state, to control the one of first field effect transistor and the second field effect transistor to switch from the first state to the second state and to control the one of the first field effect transistor and the second field effect transistor to switch from the second state to the first state;
- and
- detecting a parameter associated with one of the first field effect transistor and the second field effect transistor and to output a bias signal based on the detected parameter,
- wherein, in the first state, one of the first field effect transistor and the second field effect transistor is ON and the other of the first field effect transistor and the second field effect transistor is OFF,
- wherein, in the second state, the one of the first field effect transistor and the second field effect transistor is OFF and the other of the first field effect transistor and said second field effect transistor is ON,
- wherein detecting component is arranged with controller such that the bias signal modifies the control signal so as to extend a turn OFF time, and
- wherein the switching time is one of when the first field effect transistor switches from the first state to the second state, when the second field effect transistor switches from the first state to the second state, when the first field the second field effect transistor switches from the second state to the first state.
4 more elements
Dependencies are inferred from the claim text.