TEA1795T

GreenChip dual synchronous rectifier controller


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The TEA1795T is a member of the new generation of Synchronous Rectifier (SR) controller ICs for switched mode power supplies. Its high level of integration enables the design of a cost-effective power supply with a minimum number of external components. The TEA1795T is a dedicated controller IC for synchronous rectification on the secondary side of resonant converters. It has two driver stages for driving the SR MOSFETs, which are rectifying the outputs of the central tap secondary transformer windings. The two gate driver stages have their own sensing inputs and operate independently of each other. The TEA1795T 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)
  • Separate sense inputs for sensing the drain and source voltage of each SR MOSFET
  • High level of integration, resulting in a minimum 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 (UVP)

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 TEA1795T
Block diagram TEA1795T

Parametrics of this product

SymbolParameterConditionsMinTyp/NomMaxUnit
Isinksink currentVCC = 15 V; pins GDA/GDB = 9.5 V2.22.7A
Isourcesource currentVCC = 15 V; pins GDA/GDB = 2 V; during minimum synchronous rectification active time-0.46-0.4-0.34A
tact(sr)(min)minimum synchronous rectification activation time415520625ns
td(act)(drv)driver activation delay timeVsense(S)A = 0 V; Vsense(S)B = 0 V; Vsense(D)A = falling from +0.5 V to −0.5 V; Vsense(D)B = falling from +0.5 V to −0.5 V100ns
Tjjunction temperature-40150°C
V_deact(drv)driver deactivation voltageVsense(S)A = 0 V; Vsense(S)B = 0 V-12mV
V_reg(drv)driver regulation voltageVsense(S)A = 0 V; Vsense(S)B = 0 V-33-25-17mV
Vact(drv)driver activation voltageVsense(S)A = 0 V; Vsense(S)B = 0 V-260-220-180mV
VCCsupply voltagecontinuous-0.438V

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
TEA1795T/N1TEA1795T/N1,1189352 915 64118Volume productionSOT96-1
(SO8) 		Tape reel smdStandard Marking

Pinning information

PinSymbolDescriptionSimplified outlineGraphic symbol
1SSAsource sense input MOSFET APin configurationSOT96-1
2GNDground
3GDAgate driver output MOSFET A
4DSAdrain sense input for synchronous timing MOSFET A
5DSBdrain sense input for synchronous timing MOSFET B
6GDBgate driver output MOSFET B
7VCCsupply voltage
8SSBsource sense input MOSFET B

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
TEA1795T/N1TEA1795T/N1,118TEA1795T/N1Always Pb-free11
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Documentation for this product

TypeFormatTitleDate
Data sheetpdfGreenChip synchronous rectifier controller (v.1.0)2010-11-04
Application notepdfGreenChip SR TEA1795T dual synchronous rectification driver IC (v.1.0)2010-12-14
LogogifGreenChip logo (v.1.0)2012-04-20
User manualpdfGreenChip TEA1795T synchronous rectifier controller demoboard (v.1.0)2010-10-26
User manualpdfTEA1713 and TEA1795 demo board for 150 W all-in-one PC adapter (v.1.0)2011-09-28

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
TEA1795T/N19352 915 64118TEA1795T/N1,118ASIAWPI10,000250005/14/2012Buy online 
   NADIGI-KEY CORPORATION4,3145/24/2012Buy online 
   EUARROW EUROPE2,5005/23/2012Buy online 
   NAMOUSER ELECTRONICS2,3645/24/2012Buy online 
   NAMOUSER ELECTRONICS2,3645/24/2012Buy online 
   ASIASACL - Hong Kong/Chinayes250005/01/2012Buy online 

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