DESCRIPTION

· The TEA1720B3T is a cost-effective SMPS controller IC for low-power applications up to 12.5 W, operating directly from rectified mains input.
· Optimized for flyback converters, it ensures high efficiency across all load ranges with ultra-low no-load power consumption.
· Features primary-side sensing for output voltage regulation, eliminating the need for secondary feedback circuitry.
· Supports fast start-up from rectified mains voltage without external bleeder circuits.
· Operates in Burst mode at low power levels, minimizing audible noise and reducing no-load power consumption to <20 mW at high mains input.
· Enhances transient response when paired with the TEA1705 transient controller on the secondary side.

FEATURES

· Designed for charger applications up to 12.5 W with primary sensing for output voltage control.
· Minimizes audible noise across all operation modes.
· Compliant with USB battery charging and Energy Star 2.0 standards.
· Includes a jitter function for reduced EMI and cable compensation of 0.3 V at maximum power.
· Provides fast transient response when used with the TEA1705 transient controller.

APPLICATIONS

· Low-power SMPS for chargers and adapters up to 12.5 W.
· Applications requiring primary-side sensing for simplified design.
· Systems needing ultra-low no-load power consumption and high efficiency.
· Designs requiring fast transient response and minimal audible noise.