Integrated synchronous rectifier controllers save space and energy

NXP Semiconductors has introduced two synchronous rectifier controllers using GreenChip technology to maximise efficiency from no load to full load. Highly integrated features also allow designers to save space and cost.

The TEA1762 is available in a 14-pin SOIC package and integrates multiple features including a latch input, 2.5V reference output, and separate optocoupler driver outputs for current protection and voltage regulation.

The TEA1761, in an 8-pin SOIC package, targets highly cost-sensitive applications, combining a single optocoupler output with advantages such as easier board layout and similar dynamic performance to the TEA1762.

Both devices can be used in discontinuousconduction mode and quasi-resonant flyback converters. Besides controlling the synchronous rectifier MOSFET, the devices also integrate the voltage reference and amplifiers to regulate and control the output voltage and output current of the power supply. Other benefits for cost-sensitive power supply designs include 10V gate-driver output to drive all MOSFET brands to the lowest on-resistance, a 1%-accurate internal voltage reference for regulation, and over-temperature and undervoltage protection features.

 

FEATURES Optocoupler output range: 3.5V to 38V Supply voltage range: 8.6V to 38V General-purpose Protection input pin Separate sense-ground and power-ground connections

APPLICATIONS LCD televisions Power adapters Battery chargers

 

 

NXP TEA1761/2 Synchronous Rectifier Controllers