Datasheet

1. General description
The TEA1791AT is a member of the new generation of Synchronous Rectifier (SR)
controller ICs for switched mode power supplies. Its high level of integration allows the
design of a cost-effective power supply with a very low number of external components.
The TEA1791AT is a controller IC dedicated for synchronous rectification on the
secondary side of discontinuous conduction mode and quasi-resonant flyback converters.
The TEA1791AT is fabricated in a Silicon On Insulator (SOI) process.
2. Features and benefits
2.1 Distinctive features
 Accurate synchronous rectification functionality
 Wide supply voltage range (8.5 V to 38 V)
 High level of integration, resulting in a very low external component count
 High driver output voltage of 10 V to drive all MOSFET brands to the lowest R
DSon
2.2 Green features
 Low current consumption
 High system efficiency from no load to full load
2.3 Protection features
 Undervoltage protection
3. Applications
 The TEA1791AT is intended for adapters. The device can also be used in all other
discontinuous conduction mode systems and quasi-resonant flyback systems that
demand a highly efficient and cost-effective solution.
4. Ordering information
TEA1791AT
GreenChip synchronous rectifier controller
Rev. 01 — 7 June 2010 Product data sheet
Table 1. Ordering information
Type number Package
Name Description Version
TEA1791AT/N1 SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1