Highly Integrated High Voltage Actuator Driver
AssigneePresident and Fellows of Harvard College
InventorsSimon Chaput, Gu-Yeon Wei
Life of this patent
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Abstract
A single die driver integrated circuit is coupled to an input portion having a single inductor receiving a low voltage source and configured to drive a capacitive load with an output voltage. The driver includes a bidirectional synchronous power converter stage configured to generate a switching voltage from the input portion at a switching node and to generate a high voltage waveform from the low-voltage source. An embedded controller is configured to control a switch of the power converter stage.
Claims23
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A single die driver integrated circuit (IC) (2020, 2120) coupled to an input portion (2010) comprising a single inductor (L1) receiving a low voltage source (VIN) and configured to drive a capacitive load (2090) with an output voltage (VOUT), the driver comprising:
- a bidirectional synchronous power converter stage (2030) configured to generate a switching voltage VSW from the input portion at a switching node and generate a high voltage waveform VFOLDED from the low-voltage source;
- and
- an embedded controller (2050) configured to control a switch of the power converter stage,
- wherein the bidirectional synchronous power converter stage comprises a boost-buck converter configured to generate the high voltage waveform from the low-voltage source by transferring increments of energy to the load in a forward-boost mode and from the load in a reverse-buck mode.
A single die driver integrated circuit (IC) (2020, 2120) coupled to an input portion (2010) comprising a single inductor (L1) receiving a low voltage source (VIN) and configured to drive a capacitive load (2090) with an output voltage (VOUT), the driver comprising:
- a bidirectional synchronous power converter stage (2030) configured to generate a switching voltage VSW from the input portion at a switching node and generate a high voltage waveform VFOLDED from the low-voltage source;
- and
- an embedded controller (2050) configured to control a switch of the power converter stage,
- wherein the input portion further comprises a filter capacitor (CFILTER) connected across the low voltage source and the high voltage waveform, and a sense resistor (R1) connected between the low voltage source and the single inductor, and the single inductor is connected between the sense resistor and a switching node of the power converter stage.
A single die driver integrated circuit (IC) (2020, 2120) coupled to an input portion (2010) comprising a single inductor (L1) receiving a low voltage source (VIN) and configured to drive a capacitive load (2090) with an output voltage (VOUT), the driver comprising:
- a bidirectional synchronous power converter stage (2030) configured to generate a switching voltage VSW from the input portion at a switching node and generate a high voltage waveform VFOLDED from the low-voltage source;
- an embedded controller (2050) configured to control a switch of the power converter stage;
- a current feedback sensor (2052) configured to detect bidirectional current at the input portion;
- a zero voltage switching (ZVS) detector (2053) configured to detect a zero voltage condition for the switching node voltage VSW;
- a communication interface (2054) configured to receive an input from an external peripheral device and/or transmit to the external peripheral device;
- and
- an analog-to-digital converter (ADC) (2055) configured to receive an output form a difference amplifier 2056 disposed between a VFOLDED node and a VIN node,
- wherein the embedded controller is configured to receive a signal from at least one of the current feedback sensor, the ZVS detector, the communication interface, and the ADC.
Dependencies are inferred from the claim text.