Electronic Design
Robust Buck LED Controller IC Integrates Circuit Protection

Robust Buck LED Controller IC Integrates Circuit Protection

Single channel buck LED controller IC features LED dimming resolution with full linearity from 100% to 1%.

The AOZ1948 single channel buck LED controller IC from AOS features LED dimming resolution with full linearity from 100% to 1%. Combining key performance and added integrated circuit protection capabilities for improved system reliability and robustness, the LED controller is able to support VIN levels from 9 V to 500 V, which suits it for use in ac/dc lighting applications such as general lighting for commercial and industrial environments, and backlighting for LED TVs. The controller’s current control method provides a purported best-in-class LED current regulation of better than 2% and supports duty cycles up to 90%. In addition, the IC integrates a number of fault detection and safety features such as over-current protection, auto-restart OCP, thermal overload, high voltage sensing and adjustable fault timer. Priced at $0.495 each/1,000, the AOZ1948 LED controller IC is available immediately in production quantities, with a lead-time of 12 weeks.

ALPHA AND OMEGA SEMICONDUCTOR LIMITED

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