Efficient Power Electronics Conversion TRIZ Cases

A power supply startup circuit transitions from hard-switching to zero-voltage switching using a control module.

A multi-mode switching control circuit transitions between discontinuous and continuous conduction modes using a mode selector and PWM modulator.

Secondary control circuit sets optocoupler current to zero during light load conditions, eliminating power loss while maintaining output voltage regulation.

Active clamp circuit enables zero voltage switching in single stage isolated power factor corrected converters.

Switching controller derives on-time from switching node voltage to stabilize frequency, eliminating extra integrated circuit pins while reducing output ripple.

A correction circuit generates a corrected signal from switching current samples to enable precise average-current control.

A power supply apparatus adjusts activation timing based on detected input voltage levels.

A soft switched voltage source inverter uses a resonant ZVS network to provide zero-voltage switching for silicon switches.

A current resonance power supply uses a compensating unit to adjust detected primary side currents for accurate overcurrent protection.

A dual mode oscillator drives RF switching elements with high frequency signals during boost transitions and low frequency signals during normal operation.

An integrated converter merges three single-phase circuits into one unit to reduce component count while maintaining power factor correction.

Detection circuit derives burst mode enable signal from feedback voltage thresholds, eliminating the need for an additional external pin on PFC control ICs.

Variable pulse bursts minimize dynamic oscillations in LLC resonant converters, maintaining high efficiency across wide LED dimming ratios.

A voltage converter monitors tristate mode duration to determine optimal switching between pulse frequency and pulse width modulation.

A high voltage inverter uses a varistor and photocoupler to detect abnormal voltages on the excitation winding.

Current feed forward and modified peak current modes in the control logic reduce peak inductor current and magnetic coupling while stabilizing loop stability.

A gate driver uses a charge pump to generate boosted gating signals, eliminating multiple bias voltages and reducing design complexity.

Capacitive energy transfer with zero-current switching eliminates transformer losses and EMI in universal AC or DC power supplies.

Primary side control circuits adjust switching element on-time based on feedback voltage thresholds to reduce voltage stress on power components.

A drive circuit uses a transformer and secondary switching element to rapidly discharge MOSFET input capacitance.

A hybrid boost and low drop out converter uses dual-loop control to switch between modes for efficient voltage regulation.

Digital sampling replaces analog comparators to detect reverse current blocking points, reducing power consumption while maintaining detection accuracy.

A switch controller samples sense voltage at the half-on time point to generate a modulation wave that stabilizes LED current.