Apparatus Without Intermediate Ac Conversion TRIZ Cases

Output-current sensing through a non-ohmic element lets a DC-DC converter adapt to changing harvest conditions and improve power delivery.

A control circuit detects PMOS or NMOS power line switches and turns them off during output short-to-ground faults to block short current.

A flying capacitor and phased switching equalize inductor currents in multi-channel voltage regulators, cutting conduction loss and chip area.

A dual charge pump with status monitoring and automatic switchover maintains on-chip high voltage without extensive capacitor screening.

A charge pump stores battery energy in a capacitor, then drives discharge switching during a fire event to spread heat release and reduce damage.

A dual-current-path control circuit uses flying capacitors and fewer high-voltage switches to cut inductor current, conduction loss, and chip cost.

A 4-phase switched capacitor topology uses three floating capacitors to widen voltage conversion ratios while cutting pins, area, and cost.

An adaptive ringing clamp slows critical gate transitions to cut DC-DC converter ringing and EMI without adding major switching losses.

Charge pump and buck conversion split dual-cell charging to cut cable, chip, and PCB heat while supporting higher charging power.

A current suppression transistor limits hold-up capacitor surge current, enabling smaller SOA FETs while stabilizing load power and protection.

A dynamic PMIC and power MUX reassign under-used voltage rails so XR cores handle peak current without extra PCB area or throttling.

A clamp capacitor and auxiliary switch recycle transformer leakage inductance energy while suppressing spikes and avoiding early secondary switch turn-off.

A controller senses load current and switches gate voltage levels to cut FET conduction and switching losses in a switching converter.

Mode and phase switching cuts power loss in buck conversion when input and output voltages differ widely.

A controller uses voltage rise rate to switch from resistor pre-charge to main contact closure, limiting inrush and detecting faults.

A negator H-bridge feeds negative input to a switched-capacitor converter, raising voltage conversion ratio with fewer stages and low error.

A multi-phase startup uses RC pre-charge and inductor current control to curb in-rush current, limit overshoot, and protect DC-DC switches.

Combining input, boost, and bootstrap voltages raises driver supply strength for fast power-switching without higher quiescent current or die size.

Calibration tests consolidate inductance, capacitance, and resistance estimates to update power converter control trajectories as aging shifts parameters.

Characterization tests consolidate inductance, capacitance, and resistance estimates so control trajectories can adapt to aging and tolerances.

Alternating upper and lower compensation ramps control current peaks and valleys in SMPS loops, increasing bandwidth without parallel converters.

Raising switching frequency above resonance preserves ZVS despite circuit variation, cutting losses and suppressing overvoltage.

Charge pumps and bootstrap capacitors pull switch gates beyond supply rails to cut off-state leakage and improve light-load converter efficiency.

A parallel-top, series-bottom buck layout removes charge-transfer feedback, enabling stable 100% duty cycle without high-voltage devices.

Cross capacitors split 40-60 V input across interleaved buck stages to cut current, power dissipation, and heat in server power conversion.

A split ADC path combines slow absolute and fast relative voltage sensing to stabilize high-frequency converters with lower power and die area.

A circulation switch lets inductor current recirculate each cycle, cutting output ripple while improving converter stability and efficiency.

Cross-coupled flying capacitors let a hybrid multi-phase converter reach high voltage conversion ratios with fewer switches, lower loss, and simpler hardware.

A refresh block recharges the bootstrap capacitor during shutdown when switch-node voltage is high, keeping the high-side switch ready and avoiding false faults.

An inductive reactance element counters spike current in switched capacitor circuits, cutting EMI, circuit stress, and control complexity.

A switching and linear regulator pair shares error-amplifier feedback to keep fixed output voltage stable as battery input varies and modes change.

Staged control voltage lets a PD controller turn on a USB power switch gradually, meeting slew rate limits without a high-voltage process.

Offset current sensing and startup pulse control let this LED driver handle negative coil current and correct switching-delay current errors.

A six-phase clock and tri-state buffer recover charge from parasitic capacitors, cutting reversion loss in high-voltage charge pumps.

Minimum cross-line capacitance lets a PET transmitter detect line faults during sample periods without a connected receiver or load.

Interleaved two-phase smart power stages cut switching loss and switch stress in multiphase buck converters while improving efficiency.

Dedicated charging circuits and processor-set input voltage improve dual-battery charging stability while reducing power loss.

Reverse-biased dual diodes cut I/O capacitance while preserving ESD protection and linearity for high-speed chip signals.

A mixed series-parallel pump capacitor network evens voltage stress in switched capacitor circuits, reducing capacitor type variety and cost.

Communication-line voltage sensing detects overcurrent and current-sense resistor shorts, enabling timely protection in power transmission cables.

Recirculating charge across switched capacitors generates two output voltages with lower power loss and less circuit space in compact electronics.