Apparatus Without Intermediate Ac Conversion TRIZ Cases

A grooved cover with heat conduction sections and a refrigerant pipe spreads heat from tightly packed components for more uniform cooling.

A USB-C dual-role port with a bidirectional converter lets power tools and battery packs both receive power and charge external devices.

Pre-charging stack nodes enables switched-capacitor start-up, giving enough gate-drive voltage for self-sustaining boost conversion.

Parallel resistor-transistor divider branches use different bulk voltages to generate stable IC supply levels with low reverse leakage.

Dynamic clock control keeps charge pump output within range, cutting consumption current while sustaining CMOS body bias voltage.

A flying-capacitor and soft-switch DC-DC circuit enables three-level photovoltaic conversion without common mode current or costly SiC diodes.

Independent H-bridge operation cuts buck-boost transition delay, speeds voltage stabilization, and supports stable 5G power delivery.

A charge pump balances two secondary outputs so the boost stage switches less often, cutting EMI and energy use at low input voltage.

Fine pulse width tuning is enabled only when needed, cutting DC-DC converter power use while maintaining output voltage precision.

A cascaded DC-DC converter isolates pulsed-load transients from the battery bus, cutting voltage ripple, audible noise, and subsystem disruption.

Bootstrap capacitors charge and discharge with switching states to sustain high-side gate voltage while cutting power loss and control complexity.

Node and output status detectors keep parallel converters in soft-start until pump and output capacitors reach target charge, reducing inrush and switch stress.

Pre-charged pump capacitors drive switch timing in a switched-capacitor converter, cutting gate-drive loss and circuit complexity.

A flying capacitor and controlled switch isolation cut voltage stress in buck mode, enabling lower-voltage FETs with less silicon area.

A hybrid buck and switched-capacitor regulator uses feedback, multiphase control, and bypass switching to hold voltage and cut losses.

Staggered switch turn-on timing and tailored slew rates cut external noise in a switching power supply without raising switching loss.

Duty-cycle and load-current sensing estimate switching-converter input current, preventing voltage drops and abnormal load operation.

A dual-mode PWM and switched-capacitor supply lowers communication-circuit voltage in power saving mode without sacrificing conversion efficiency.

Current-adaptive feedforward control works with voltage regulation to minimize DC-DC converter output ripple and protect connected assemblies.

Charge recirculation across switched capacitors generates dual gate-drive voltages with lower current draw and less converter space.

Adjusting transformer turns ratio gives this power conversion circuit a variable input-output gain, extending buck use across different voltage needs.

A digital controller stores threshold-crossing voltage levels and drives an intermediate output to limit steady-state current with less oscillation.

Equivalent charging-path models capture PMIC shunting effects and identify the quick-charging circuit with the lowest heat loss.

Internal voltage selection lets a power converter start in reversed or bidirectional modes without external booster or pre-charge circuits.

Dead-time adjustment lets parallel STC modules match output current despite impedance and parasitic differences, improving efficiency and reducing damage risk.

Voltage-aware switching control limits inductor current in an inverting buck-boost converter, cutting power loss, heat, and component size.

Phase-based switch commutation with flying and pump capacitors extends hybrid converter regulation beyond the 2VIN limit.

Automatic switching between internal charge pump and external negative supply cuts RF switch voltage slumps without using more die space.

Capacitor-fed gate drivers and cascoded MOSFET switching cut voltage stress and loss in switched-capacitor converters while reducing high-voltage device use.

A split-midpoint multi-level converter cuts series switch count and removes inductor current ripple for efficient 4:1 and 6:1 conversion.

A start circuit uses electromagnetic coupling to pre-charge flying and output capacitors, limiting inrush current and protecting power converter components.

Charging mode switches by display state, using charge pump or direct charging to limit heat and keep the device usable while charging.

During light loads, the converter shifts to two-level operation to build inductor current faster, reduce switching losses, and improve efficiency.

A clamping circuit controls the protection device during transient over-voltage, keeping the power converter operating without damage.

Sensor data and relay cycle analysis estimate remaining UPS relay life, improving replacement timing and reducing failure risk.

Using positive and negative voltages with shared switching, this liquid lens drive circuit cuts IC size, power use, and cost in camera modules.

Split control and power switches across two chips with a fast bus to cut parasitics, speed voltage regulation, and handle transient loads.

Multiple-switch buck-boost control shortens buck-to-boost transitions, stabilizing voltage faster for 5G signal sensitivity.

Two parallel converters and split capacitors avoid extreme duty cycles while generating configurable positive or negative step-down output.

A step-up auxiliary input offsets regulator dropout so automotive LEDs stay correctly biased at lower battery voltages.

A unified controller switches regulator modes and charge-pump ratios to keep output voltage stable as input voltage changes.

Periodic capacitor reconfiguration enables 2x to 4x conversion while cutting high-voltage switch count, circuit size, cost, and power loss.

A boost circuit uses transistor current amplification to charge the supply capacitor faster without overloading IC startup current.

Dynamic SCVR mode switching reconfigures charge redistribution phases to maintain output voltage and improve current capability across buck, boost, and turbo modes.

Cascaded half-bridge blocks and coupled inductors let one converter handle 300-700 V fuel cell variation while matching battery voltage.

Using NMOS switches plus boost and bootstrap capacitors, this case shows how to generate stronger negative voltage with lower output impedance.

Dynamic clocking slows the charge pump during recovery peaks and speeds it up afterward to cut peak current without hurting memory performance.