Power Distribution Sub-System

onsemi enables a highly integrated power tree for 1S-10S drone platforms, managing the full chain from a multi-cell Li-ion battery rail (roughly 3V to 42V, and up to ~65V) through conversion, protection, sensing, and propulsion drive - while maintaining high efficiency, low thermal dissipation, and stable rails for mission-critical electronics.

• Battery Monitoring & Protection: NCS35011 delivers 3S/4S/5S Li-ion over- and under-voltage detection, safeguarding multi-cell packs across a continuously changing state of charge.
• Wide-Input DC-DC Conversion: FAN6500x synchronous buck regulators (4.5–65V input, 6–10A, 0.6–55V rails, 100kHz–1MHz switching, up to ~98% efficiency with integrated MOSFETs and ±1% reference) step the battery bus down to regulated 12V, 5V, and 3.3V domains.
• eFuse Fault Protection: NIS3071 four-channel eFuse (8–60V, 2.5A per channel) scales to 600W - configurable as 1×600W, 2×300W, or 4×150W - with adjustable current limit, per-channel thermal shutdown, and fast circuit-breaker response, no external shunt required.
• Propulsion Power Stage: LV MOSFET families T6/T8/T10/PTNG (RDS(on) as low as 0.4mΩ, 40-150V, Iₕ up to ~558A, −55°C to 175°C) with top- and dual-side cooling drive BLDC ESCs up to ~1kW in Power 33/56/88, TCPAK, and TOLL packages.
• Gate Drive: NCV51511, NCP51513, NCP81075, FAN8811T, and NCD83591 gate drivers (60–180V, up to 4A/6A, with 3-phase and integrated current-sense options) provide fast, precise switching to fully leverage low-RDS(on) MOSFETs.

Together, these building blocks let engineers partition mixed-voltage propulsion, payload, and avionics loads across a tightly managed energy budget with minimal losses and robust fault isolation. Design tools including WebDesigner+ Power Supply, the SPICE Live Model, and the Current Sense Design Tool speed rail sizing and part selection, helping teams balance efficiency, thermal headroom, and flight time while accelerating time to market.