TEA1762T/N2/DG,118 NXP

TEA1762T GreenChip synchronous rectier controller Rev. 02 25 April 2007 Product data sheet 1. General description The TEA1762T is a member of the new generation of Synchronous Rectier (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 TEA1762T is a controller IC dedicated for synchronous rectication on the secondary side of discontinuous conduction mode and quasi resonant yback converters. Besides electronics for synchronous rectication, it also has integrated circuitry for output voltage and output current regulation. The TEA1762T is fabricated in a Silicon On Insulator (SOI) process. This NXP SOI process makes possible a wide range of operation. 2. Features 2.1 Distinctive features n Combined synchronous rectication and primary feedback control functionality n Wide supply voltage range (8.6 V to 38 V) n High level of integration, resulting in a very low external component count n Wide opto output voltage range (3.5 V to 38 V) n Accurate internal voltage reference for voltage control (within 1 %) n Separate sense ground for accurate voltage sensing n High driver output voltage of 10 V to drive all MOSFET brands to the lowest R DSon n Reference voltage output pin 2.2 Green features n Low current consumption n High system efciency from no load to full load 2.3 Protection features n Undervoltage protection n Internal over-temperature protection n General purpose protection input pinTEA1762T NXP Semiconductors GreenChip synchronous rectier controller 3. Applications n The TEA1762T is intended for adapters. The device can also be used in all other discontinuous conduction mode and quasi resonant yback systems that demand a highly efcient and cost-effective solution. 4. Ordering information Table 1. Ordering information Type number Package Name Description Version TEA1762T SO14 plastic small outline package 14 leads body width 3.9 mm SOT108-1 5. Block diagram V CC 14 10 8 VSENSE OPTOREG VREF 9 2.5 V 11 ISENSE 50 mV 7 OPTOPROT 4 PROTECT 1.25 V OVER TEMPERATURE PROTECTION 1 SRSENSE control Q R TIMER 6 2 m s DRIVER Q S 2.2 m s - 310 mV - 12 mV - 55 mV 5, 12, 13 2 3 014aaa059 n.c. POWERGND SENSEGND Fig 1. TEA1762T block diagram TEA1762T 2 NXP B.V. 2007. All rights reserved. Product data sheet Rev. 02 25 April 2007 2 of 15