TEA1731TS

Low voltage start-up flyback controller suitable for fixed frequency/CCM


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The TEA1731TS is a low cost Switched Mode Power Supply (SMPS) controller IC intended for flyback topologies. The TEA1731TS operates in peak current and frequency control mode. Frequency jitter has been implemented to reduce ElectroMagnetic Interference (EMI). Slope compensation is integrated for Continuous Conduction Mode (CCM) operation.

Features and benefits

  • SMPS controller IC enabling low-cost applications
  • Large input voltage range (12 V to 30 V)
  • Integrated OverVoltage Protection (OVP) on VCC
  • Very low supply current during start-up and restart (10 µA typical)
  • Low supply current during normal operation (0.58 mA typical without load)
  • IC overtemperature protection
  • Internal overpower time-out
  • Overpower or high/low line compensation
  • Fixed switching frequency with frequency jitter to reduce EMI
  • Frequency reduction at medium power operation
  • Frequency reduction with fixed minimum peak current
  • Frequency increase at peak power operation
  • Protection input (for external OTP and external OVP)
  • Slope compensation for CCM operation
  • Adjustable soft start
  • Low and adjustable OverCurrent Protection (OCP) trip level

Applications

  • All applications requiring efficient and cost-effective PSU solutions up to 75 W
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram
Block diagram

Demo boards

TEA1731DB0001TEA1731DB0001

TEA1731 40 W 19.5 V Notebook adapter


Parametrics of this product

SymbolParameterConditionsMinTyp/NomMaxUnit
Vstartupstart-up voltage19.321.323.3V
foscoscillator frequencypeak power80kHz
foscoscillator frequencyhigh power65kHz
foscoscillator frequencymedium power26.5kHz
ICC(startup)start-up supply currentVCC < Vstartup51015µA
Tjjunction temperature-40150°C
VCCsupply voltagecontinuous-0.430V
VCCsupply voltaget < 100 ms35V
Vth(UVLO)undervoltage lockout threshold voltage11.212.513.8V

Package

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
TEA1731TS/1TEA1731TS/1,1159352 965 44115Volume productionSOT457
(TSOP6) 		Tape reel smdStandard Marking

Pinning information

PinSymbolDescriptionSimplified outlineGraphic symbol
1VCCsupply voltagePin configurationSOT457 (SC-74)
2GNDground
3PROTECTgeneral purpose protection input
4CTRLcontrol input
5ISENSEcurrent sense input
6DRIVERgate driver output

Outline drawing

Package VersionPackage NamePackage DescriptionReference CodesIssue Date
SOT457TSOP6plastic surface-mounted package (TSOP6); 6 leadsSC-74 (EIAJ); 2006-03-16

Related documents

Brochure

Other type

Reflow soldering

Selection guide

Wave soldering

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
TEA1731TS/1TEA1731TS/1,115TEA1731TS/1Always Pb-free11
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Documentation for this product

File nameTitleTypeFormatDate
TEA1731TSGreenChip SMPS control ICData sheetpdf2012-08-16
AN11123GreenChip TEA1731(L)TS fixed frequency flyback controllerApplication notepdf2012-04-12
75017212NXP GreenChip flyback controller TEA1731(L)Leafletpdf2012-02-01
001aan129GreenChip logoLogogif2012-04-20
UM10506Greenchip 40 W TEA1731LTS/TS demo boardUser manualpdf2012-10-23

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
TEA1731TS/19352 965 44115TEA1731TS/1,115EUFarnell Europe2,775105/23/2013Buy online 
   NANEWARK/ELEMENT142,5855/23/2013Buy online 
   ASIAElement 140123/05/2013Buy online 
   ASIASACL - Hong Kong/Chinayes300005/01/2013Buy online 

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Demo boards

TEA1731DB0001
TEA1731DB0001

TEA1731 40 W 19.5 V Notebook adapter

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