TEA1791T/N1

TEA1791T GreenChip synchronous rectifier controller Rev. 02 7 June 2010 Product data sheet 1. General description The TEA1791T 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 TEA1791T is a controller IC dedicated to synchronous rectification on the secondary side of discontinuous conduction mode and quasi-resonant flyback converters. The TEA1791T 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 TEA1791T 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 Table 1. Ordering information Type number Package Name Description Version TEA1791T/N1 SO8 plastic small outline package 8 leads body width 3.9 mm SOT96-1TEA1791T NXP Semiconductors GreenChip synchronous rectifier controller 5. Block diagram V CC 8 1 SRSENSE control Q R TIMER 4 2 s DRIVER Q S 2.2 s 310 mV 12 mV 55 mV 3, 5, 6, 7 2 n.c. GND 014aaa700 Fig 1. Block diagram 6. Pinning information 6.1 Pinning SRSENSE 1 8 V CC 2 7 GND n.c. TEA1791T n.c. 3 6 n.c. 4 5 DRIVER n.c. 014aaa701 Fig 2. Pin configuration 6.2 Pin description Table 2. Pin description Symbol Pin Description SRSENSE 1 synchronous timing input GND 2 ground n.c. 3 not connected DRIVER 4 driver output for SR MOSFET n.c 5 not connected n.c. 6 not connected n.c. 7 not connected V 8 supply voltage CC TEA1791T All information provided in this document is subject to legal disclaimers. NXP B.V. 2010. All rights reserved. Product data sheet Rev. 02 7 June 2010 2 of 12