TEA1791T

GreenChip synchronous rectifier controller


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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.

Features and benefits

  • 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 RDSon
  • Low current consumption
  • High system efficiency from no load to full load
  • Undervoltage protection

Applications

  • Intended for adapters and other discontinuous conduction mode systems
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram: TEA1791T
Block diagram: TEA1791T

Parametrics of this product

SymbolParameterConditionsMinTyp/NomMaxUnit
Isinksink currentVCC = 15 V; voltage on pin DRIVER = 9.5 V2.22.7A
Isourcesource currentVCC = 15 V; voltage on pin DRIVER = 2 V-0.3-0.25-0.2A
tact(sr)(min)minimum synchronous rectification activation timeShort time1.522.5µs
td(act)(drv)driver activation delay time125ns
Tjjunction temperature-40150°C
V_deact(drv)driver deactivation voltage-12mV
V_reg(drv)driver regulation voltage-65-55-45mV
Vact(drv)driver activation voltage-340-310-280mV
VCCsupply voltage-0.438V

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
TEA1791T/N1TEA1791T/N1,1189352 873 92118Volume productionSOT96-1
(SO8) 		Tape reel smdStandard Marking

Pinning information

PinSymbolDescriptionSimplified outlineGraphic symbol
1SRSENSEsynchronous timing inputPin configurationSOT96-1
2GNDground
3n.c.not connected
4DRIVERdriver output for SR MOSFET
5n.c.not connected
6n.c.not connected
7n.c.not connected
8VCCsupply voltage

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
TEA1791T/N1TEA1791T/N1,118TEA1791T/N1Always Pb-free11
Quality and reliability disclaimer

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Documentation for this product

TypeFormatTitleDate
Data sheetpdfGreenChip synchronous rectifier controller (v.2.0)2010-06-07
Application notepdfSSL2102 30 W flyback triac dimmable LED driver (v.2.0)2011-03-23
Application notepdfGreenChip SR TEA1791 integrated synchronous rectification controller (v.1.0)2009-02-09
LogogifGreenChip logo (v.1.0)2012-04-20
Other typepdfData sheet TEA1791T GreenChip 同期整流コントローラ (v.1.0)2011-02-23
Other typepdfApplication guide: Set-top boxes (STBs) (v.1.0)2011-11-28
User manualpdfSSL2101 12 W mains dimmable LED driver (v.2.0)2011-02-03
User manualpdfSSL2102 19 W to 22 W mains dimmable LED driver (v.2.0)2011-02-01
User manualpdf90 Watt notebook adapter with TEA1751T and TEA1791T (v.1.1)2010-04-20
User manualpdf90 Watt notebook adapter with TEA1752T and TEA1791T (v.1.0)2010-05-28
User manualpdf120 Watt notebook adapter with TEA1752T and TEA1791T (v.1.0)2010-10-19
User manualpdf90 W notebook adapter with TEA1753, TEA1703 and TEA1791 (v.1.0)2011-04-04

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
TEA1791T/N19352 873 92118TEA1791T/N1,118ASIAWPI5,000250005/14/2012Buy online 
   NAMOUSER ELECTRONICS4,2615/24/2012Buy online 
   NAMOUSER ELECTRONICS4,2615/24/2012Buy online 
   NAAVNET EXPRESS2,5005/24/2012Buy online 
   JAPANCHIP ONE STOPyes05/14/2012Buy online 

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