Efficient Power Electronics Conversion TRIZ Cases

Gate drive voltage tracks synchronous rectifier current to cut resonant-converter loss and improve switching efficiency at high frequency.

A sample-and-hold capacitor creates a negative reference for accurate buck converter valley current limiting without lossy sense resistors.

Auxiliary winding current sensing adjusts low-side pulse width to maintain ZVS in resonant flyback converters while cutting light-load loss.

Variable-frequency control tracks plasma resonance through ignition and maintenance to avoid current surges and power-supply damage.

Using one current sensor to drive both switches, this case avoids noisy voltage sensing and prevents reverse current in synchronous rectifiers.

Digital load sensing adjusts DCDC peak current and safely disables the LDO to prevent cycling, improving RF stability and efficiency.

A sample-and-hold capacitor and sense FET detect and limit valley current in buck converters without lossy resistors or complex circuitry.

Vertically stacked PCBs with a bottom cold plate cool high-loss parts actively and low-loss parts passively to raise power density in less space.

A shared IC pin alternates between current sensing and inductor temperature sensing to cut boost PFC size and cost while adding over-temperature protection.

Natural resonance between output inductors and capacitors enables soft switching in a three-phase inverter while cutting loss, EMI, and circuit overhead.

Bus-voltage and output-power partitions set valley counts in a quasi-resonant flyback supply to lower switching loss across varying conditions.

Dual lossless conversion paths switch secondary-side LDO supply by threshold to reduce light-load power loss in flyback converters.

Predictive secondary-side control times the synchronous rectifier to cut gate-drive and switching losses while sustaining zero-voltage switching.

Low-frequency pulse control lets a bridge inverter self-oscillate for real-time resonance tracking without complex feedback or negative resistance circuits.

Derivative-based current control helps an LLC resonant power IC respond to sudden load changes and prevent output voltage drops.

Embedded magnetic layers between PCB windings raise leakage inductance, enabling soft switching and lower EMI in planar transformers.

Clamp switch timing is extended beyond half the resonance period to limit resonance current, avoid negative excitation current, and cut loss.

Soft-switching resonance enables ZVS/ZCS in a non-isolated LLC converter, cutting switching and transformer losses while shrinking size and cost.

Pulse-skipping compensation smooths synchronous-to-asynchronous transitions in a switching power converter to limit output voltage fluctuation.

Secondary conductors pass through core openings to shorten winding length, cut Joule heating, and support compact high-current LLC transformers.

Using one current sensor to control both switches, this case avoids noisy voltage sensing and helps prevent reverse conduction short-circuits.

A closed-loop dummy load keeps a DC-DC converter above minimum frequency at light load, avoiding low-frequency noise and open-loop energy waste.

Negative-coupled inductors and a resonant rear stage enable zero-current and zero-voltage switching to cut converter losses.

Inductor current and midpoint voltage sensing set switch timing to achieve ZVS in a totem-pole PFC circuit and improve efficiency.

Offsetting converter switching transitions from measured state data compensates semiconductor voltage drops and cuts output distortion.

Alternating constant-voltage and constant-charge switching keeps piezoelectric converters near resonance while blocking common-mode voltage.

Primary-side current pulse sampling detects no-plasma, ignition, and maintenance states without direct high-voltage sensing.

Neural-network prediction of RF envelope peaks and valleys simplifies converter control, cutting delay and hardware workload in envelope tracking power supplies.

A bootstrap capacitor and diode network doubles gate-drive voltage during transitions, cutting wide-bandgap switching loss without extra supplies.

Built-in defect checks and pre-start capacitor conditioning help a charge pump avoid open or short faults and hold the target output voltage.

Fixed-frequency PFC rectifier control adjusts output voltage to maintain ZVS, cutting switching losses while simplifying EMI filter design.

Dynamic feedback thresholds and gradual transistor ON-time control stabilize output voltage during normal-to-burst mode changes in DC-DC converters.

A charging circuit monitors bootstrap capacitor voltage and adjusts recharge timing to keep high-side switching precise while cutting power use.

Wide-bandgap switching and interleaved half-bridges raise inverter switching frequency, shrinking reactive elements while limiting EMI.

Optimized resonant inductance, capacitance, and dead time enable ARCP soft switching while reducing current stress and electromagnetic interference.

Interleaved PCB windings and vias cancel magnetic flux in a planar transformer, cutting AC impedance, size, and converter losses.

Alternating high-frequency switching between full-bridge switch pairs cuts zero-voltage current spikes, EMI, and uneven heat in AC-DC conversion.

Feedback-based zero-current detection improves DCM timing in synchronous boost converters to prevent reverse inductor current and power loss.

Backflow current detection forces both transistors off during a high-side short, suppressing overcurrent in PWM synchronous regulators.

A two-board planar transformer layout spreads large current and expands cooling area to reduce heat loss in resonant converters.

A latched comparator signal helps high-frequency buck converters detect overcurrent reliably, limiting spikes and switching losses.

Periodic secondary shorting and phase reduction widen converter voltage range, keep currents symmetric, and improve light-load efficiency.

A zero-crossing transition band with open-loop and hysteresis control reduces mode-switch oscillation and grid-current THD in transformer converters.

A monolithic high-side LDMOS and low-side source-down MOSFET pair cuts parasitic inductance and resistance in synchronous buck converters.

Series bridge-arm outputs halve switching-tube voltage stress, cutting EMI and simplifying wide-range power conversion.

Pre-charging the sensing capacitor to the input voltage cuts delay and keeps DC-DC inductor peak current stable across input changes.

Adaptive minimum switching frequency expands resonant converter output range while maintaining inductive operation and reducing device stress.

Programmable phase-to-controller coupling lets a multiphase converter reconfigure power stages to match load demand and improve efficiency.

Periodic secondary shorting and phase reduction extend voltage range, keep currents symmetric, and improve converter efficiency at light loads.

Adjustable threshold current and minimum on-time keep panel voltage stable in pulse skip mode, reducing flicker and power use.

Real-time voltage spike feedback adjusts DC/DC startup duty or frequency to speed reverse charging while protecting power switches.

Adaptive Ton and Toff control improves switching converter efficiency while smoothing CCM, TM, and DCM transitions across variable loads.

Inductor current indication enables PFM/CCM switching without direct load measurement, improving converter efficiency across varying loads.

Shifting from PFM to phase-difference modulation lets a resonant converter clamp switching frequency, cut losses, and keep output voltage stable.

A normally-on GaN transistor charges a start-up capacitor for SMPS control power, then cuts standby draw without a high-ohmic resistor.

Co-packaging the secondary FETs shortens interconnect paths in a transformer converter, cutting parasitic losses and PCB area.

Valley sensing at the switch node synchronizes transistor turn-on with voltage minima, cutting switching losses in quasi-resonant flyback converters.

Adjacent-phase bidirectional switches let multiple inductors charge together during load steps, speeding DC-DC transient response without higher switching frequency.

Dynamic phase switching keeps magnetically coupled conversion parts balanced, improving power conversion efficiency across a wide current range.

Sense resistors replace current transformers in a totem-pole PFC, simplifying coil current detection while lowering cost and control complexity.

During grid overcurrent events, the control circuit reduces reactor current and resumes switching at zero-cross timing to avoid repeated trips.

Master-slave timing keeps parallel bidirectional flyback converters interleaved under variable-frequency valley switching, cutting ripple and EMI.

By varying NPC bridge arm counts by loss ratio, this converter balances IGBT losses, simplifies heat-sink design, and cuts device count.

Multiple bridge arms and resonant branches widen voltage gain and cut switching loss in 36V-75V to 12V or 5V conversion.

A replenishment power transistor restores driver supply in an active clamp flyback circuit, preventing bootstrap voltage drop and under-voltage.

A hybrid boost and step-up DC/DC converter narrows variable PV voltage range to cut losses and improve downstream DC/AC efficiency.

A reconfigurable switched-capacitor stage paired with magnetic regulation sustains fast response and efficient DC-DC conversion across wide input voltages.

A single secondary-side switch and coordinated timing enable reverse power transfer in an active clamp flyback converter with lower losses and fewer components.

A capacitive flyback secondary buffer cuts leakage-induced spike voltage while avoiding resistive loss, improving EMI and converter efficiency.

Digital subtraction control replaces transformer-based feedback in a bidirectional inverter, cutting size, cost, losses, and distortion.

Dynamic switching between flyback and active clamp modes prevents secondary surge current while preserving zero-voltage switching efficiency.

Feedback-timed turn-off in an active clamp flyback circuit cuts main transistor turn-on loss and improves efficiency in DCM.

A third-inductor filter path cuts snubber current impedance, leakage current, and switching loss in high-frequency unipolar full-bridge inverters.

Purposely discharging the DC-bus during OFF intervals lets an induction cooktop QR converter keep soft switching at low power, cutting ticking noise.

A finned extruded tube, O-ring seals, and insulating oil enable compact high-efficiency power conversion without ignition risk in hazardous areas.

A shared multi-tapped autotransformer enables zero-voltage switching in switched-capacitor converters, cutting losses across wide input ranges.

Coil-phase gate signals and an auxiliary coil simplify H-bridge drive control, cutting switching losses in wireless power transfer.

Dual timers and control logic adjust switch on-off timing from input and output voltages to widen DC-DC converter duty cycle and voltage ratio range.

Parallel resonant tank branches cut current density and fire risk while feedback-based frequency control keeps multi-module outputs consistent.

Iterative current emulation estimates average output current in diode emulation mode without complex filters or divider circuits.

Drain-voltage differentiation or integration helps distinguish discharge from oscillation, improving synchronous rectifier turn-on timing and preventing current reflux.

Magnetizing current and synchronized rectifier turn-off create zero-voltage switching, improving light-load efficiency in isolated multi-output converters.

Individual zero-voltage control of each bidirectional switch element cuts capacitance loss and heat in AC-DC switching power supplies.

Using the damping capacitor to power the control circuit removes external supply routing, simplifying discharge switch control and cost.