Analog Devices International Unlimited Company

Analog Devices,inc.

Linear Technology Holding LLC

Xugang Ke

Min Hao Chen

Keith Szolusha

Shuilin Tian

Wei Gu

Yaojie Xu

Wen Chuen Liu

Min Chen

A UHV-LV interface circuit that is capable of the following, among other things: 1) starting up a primary controller of a power converter circuit with a precisely controlled startup charging profile; 2) performing pulse-based line-voltage sensing with reduced power and improved sensing accuracy; and 3) discharging a capacitor, e.g., class-X2 capacitor, with a stable supply voltage for the controller. The UHV-LV interface circuit can use a single UHV device, such as a single depletion-mode transistor, e.g., field-effect transistor (FET).

High-voltage to low-voltage interface in power converter circuit

The Kappa converter circuit, as introduced herein, can be configured for step-down (buck), step-up (boost), or buck-boost operation. The Kappa converter circuit exhibits lower electromagnetic interference (EMI) relative to other buck, boost, or buck-boost topologies, such as without additional input or output filter circuits. The Kappa converter circuit can have high power handling capability and less DCR loss, for example due to a distribution of current signals through respective inductors. The Kappa converter circuit includes isolating inductors at its input and ground reference nodes to help reduce signal bounce or signal pulsations at supply and ground reference busses, thereby further reducing EMI noise due to switching in the circuit. When the Kappa converter is configured for step-up operation, the converter exhibits no right-half-plane (RHP) zero.

Kappa switching DC-DC converter with continuous input and output currents

A high-voltage level shifter circuit that is capable of level shifting a signal from a low-voltage rail to a high-voltage rail for effective gate driving of a top power switch, with a short propagation delay and a high common-mode transient immunity (CMTI). The high CMTI high-voltage level shifter circuit can include a differential input and isolation stage, a high dv/dt sensor and cancellation stage, at least one differential and common-mode gain stage, and an output buffer stage.

High common-mode transient immunity high voltage level shifter

Techniques for multiple-phase, high-boost converters are provided. In an example, a multiple-phase switched-capacitor-inductor (MPSCI) boost converter can include a first phase circuit, a second phase circuit, and a capacitor. Each of the first phase circuit and the second phase circuit can include a first switch, an inductor having a first node coupled to a first supply rail, and a second switch configured to selectively couple a second node of the inductor to a second supply rail. The capacitor can be coupled between the second node of the inductor of the second phase circuit and the first switch of the second phase circuit.

Multiple-phase switched-capacitor-inductor boost converter techniques

A supply circuit comprises a regulated positive supply circuit and an unregulated negative supply circuit. The regulated positive supply circuit includes an inductor arranged to receive input energy from an input circuit node, a switch circuit coupled to the inductor at a switch circuit node, and a control circuit coupled to the switch circuit. The control circuit is configured to control activation of the switch circuit to regulate a voltage at a regulated circuit node and generate a positive output voltage at a positive output circuit node. The unregulated negative supply circuit is operatively coupled to the switch circuit node and is configured to generate a negative supply voltage at a negative output circuit node.

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Santa Clara, CA, United States of America

Xugang Ke