Adaptive controller for a voltage converter
AssigneeTexas Instruments Incorporated
InventorJianzhang Xie
Life of this patent
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Abstract
A DC-to-DC converter includes an input voltage node, an inductor, and a switch coupled to the inductor and the input voltage node. More specifically, the switch has an on state and off state, wherein during the on state, current flowing through the inductor increases and the off state results in a decrease of the current flowing through the inductor via a driver coupled to the switch. The driver comprises a plurality of transistors and an adaptive voltage node, wherein a voltage level at the adaptive voltage node is to vary in accordance with the current flowing through the inductor so as to decrease a variation of the amount of time to turn off the switch.
Claims4
A controller for a DC-DC converter comprising a MOSFET low side switch transistor having a parasitic gate capacitance which must be discharged to turn off the transistor, the controller comprising:
- a circuit for generating a load signal representative of the load current through the inductor;
- and
- a driver circuit coupled to the gate of the low side driver MOSFET transistor responsive to load signal and providing a control signal to the gate to discharge to gate capacitance and control signal varying inversely to load current through the inductor.
Dependencies are inferred from the claim text.