What this controller is and where it fits
The Maxim Integrated MAX16833AUE/V+T is a DC DC controller designed for driving external MOSFETs in LED lighting applications, qualified to AEC-Q100 for automotive use. It supports multiple topologies — Flyback, SEPIC, Step-Down (Buck), and Step-Up (Boost) — making it a single-part solution for a range of automotive LED strings from daytime running lamps to high-beam headlights. The controller operates from a 5V to 65V supply, covering 12V and 24V battery systems with margin for load-dump transients. Switching frequency is programmable from 100kHz to 1MHz, letting the designer trade inductor size against switching loss. Dimming can be either analog (linear current adjust) or PWM, both supported natively.
Automotive qualification and temperature range
The operating temperature range of -40°C to 125°C (ambient) suits under-hood and engine-bay environments. The AEC-Q100 grade is often a non-negotiable requirement for automotive lighting BOMs.
Sourcing and lifecycle
The MAX16833AUE/V+T is listed as Active in production status, with ROHS3 compliance. The AEC-Q100 qualification means it is already qualified for automotive OEM BOMs, reducing requalification risk.
