Power Electronics & Power Management Design
Converters, chargers, battery management, and motor drives — the power stage designed with the same rigor as the product it feeds.
What is power electronics design?
Power electronics design is the engineering of circuits that convert and control electrical energy: DC-DC converters, AC-DC supplies, battery charging and management, and motor drives. We design power stages from architecture through magnetics, layout, and thermal validation, sized with margin for efficiency, heat, and regulatory limits.
Power is a system decision
The classic failure mode: the product is nearly done, someone bolts on a regulator to feed the last rail, and the battery life lands at half the spec. Power architecture belongs at the start of a design, when the choice of rails, topologies, and sleep strategies can still shape everything downstream.
We budget power the way accountants budget money. Every load is counted at worst case, every conversion stage pays its efficiency tax on paper first, and the battery is sized against the ledger rather than against optimism.
Power problems we get called about
Some engagements start from a blank page. Many start from one of these.
Validated on the bench, not in the datasheet
Datasheet efficiency curves describe an evaluation board at a comfortable temperature. Your product is not that board. Our power designs leave the bench with their own measured evidence: efficiency swept across line and load, transient response captured on real load steps, and a thermal image proving the hottest component stays inside its derating at sustained worst case.
When production begins, those measurements become the test limits, so every unit that ships is checked against what the design was proven to do.
Linear vs. switching regulation: which belongs in your design?
Almost every product ends up needing both. A linear regulator drops excess voltage as heat and rewards you with simplicity and a clean output; a switching converter moves energy efficiently but brings noise, magnetics, and layout sensitivity. Choosing wrong costs battery life at one end and corrupted measurements at the other.
| Linear regulator (LDO) | Switching converter | |
|---|---|---|
| Efficiency | Set by the voltage ratio — dropping 12 V to 3.3 V wastes nearly three-quarters of the power as heat | Typically 85–96% across wide input ranges |
| Output noise | Very low; the natural choice for analog, RF, and precision rails | Switching ripple needs filtering, and layout discipline is mandatory |
| Cost and footprint | One part and two capacitors | Controller, inductor, and board area — more of everything |
| Heat | All the dropped power, dissipated locally | Little heat at moderate loads; thermal design still matters at power |
| Where each wins | Final clean-up rails, noise-critical supplies, tiny loads | Battery products, large step-down ratios, anything beyond a few hundred milliwatts |
Power conversion we design
How a power design is proven
- 01
Power Budget
Every rail and every load, at worst case rather than typical. Battery products get runtime targets converted into a current budget the whole team designs against.
- 02
Topology Selection
Buck, flyback, or linear; isolated or not. Regulatory and isolation requirements decide as much as efficiency does, and this is where those constraints get settled.
- 03
Stage Design
Component stress analysis, magnetics design, and control-loop compensation. Parts are chosen for their derated reality, not their headline ratings.
- 04
Layout & Thermal
Power layout is its own craft: switching loops kept tight, copper doing double duty as heatsink, and noisy nodes kept away from everything that measures.
- 05
Bench Validation
Load steps, efficiency sweeps across line and load, and thermal imaging under sustained worst case, before the design is released.
The design package
Power capability at a glance
Power Electronics Design FAQs
Yes, at product scale: charging, protection, cell balancing, and fuel gauging for lithium packs inside devices and equipment. That covers most battery-powered products. Grid-scale and large energy-storage BMS is a different specialty and not what we do.
On the bench, against worst cases the datasheet never mentions. Efficiency is swept across line and load, not quoted at the sweet spot. Load transients are hit with electronic loads while we watch the supply recover. Thermal imaging finds the component running hotter than its derating allows. A power stage that has only been simulated has not been validated.
Usually, yes. Power stages are the most common source of conducted and radiated emissions failures, and the fixes range from snubber and filter changes to a layout revision of the switching loop. We start by reproducing the failure with pre-compliance measurements, so the fix is aimed at the actual noise path instead of guessed at.
A single well-specified DC-DC rail added to an existing board is a small, quick engagement. A complete offline supply with PFC, safety isolation, and regulatory testing is a serious project. Power level, isolation requirements, and certification scope drive the quote, which we fix after reviewing your requirements.
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