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US 2019/0199346 A1Published application
Llc converter with wake-up circuitry
AssigneeFlextronics AP, LLC
InventorAntony E. Brinlee
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Abstract
A circuit arrangement is disclosed for controlling the switching of a field effect transistor (FET). A current controlled amplifier may be configured to amplify a current in a current sense device to generate an amplified current, wherein the current in the current sense device indicates a current through the FET. A comparator may be coupled to the current sense amplifier to compare a voltage corresponding to the amplified current with a voltage reference and to generate a comparator output based on the comparison, wherein the comparator output controls whether the FET is on or off.
Claims20
An LLC converter comprising:
- a transformer including a primary side and a secondary side, wherein the secondary side includes a first secondary winding and a second secondary winding;
- an output capacitor coupled to the first secondary winding and to the second secondary winding, the output capacitor configured to store an output charge;
- a first switch serially coupled between the first secondary winding and the output capacitor, wherein the first switch is configured to control charging the output capacitor;
- a first controller coupled to the first secondary winding, the first controller configured to control whether the first switch is open or closed, wherein the first controller includes a first current controlled amplifier to amplify a sensed first current flowing through the first switch;
- a second switch serially coupled between the second secondary winding and the output capacitor, wherein the second switch is configured to control charging the output capacitor;
- a second controller coupled to the second secondary winding, the second controller configured to control whether the second switch is open or closed, wherein the second controller includes a second current controlled amplifier to amplify a sensed second current flowing through the second switch;
- and
- a wake-up circuit configured to deliver a pulse to wake up the LLC converter.
5 more elements
Dependencies are inferred from the claim text.