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TEA1751T; TEA1751LT

Selection guide

Datasheet

TEA1751T; TEA1751LT
(Product Specification)
10-Jul-08, 29 pages, 598 kB

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TEA1751T; TEA1751LT - GreenChip III SMPS control IC

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The GreenChip III is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. The TEA1751(L)T (TEA1751T and TEA1751LT) combines a controller for Power Factor Correction (PFC) and a flyback controller. Its high level of integration allows the design of a cost-effective power supply with a very low number of external components.

The special built-in green functions provide high efficiency at all power levels. This applies to quasi-resonant operation at high power levels, quasi-resonant operation with valley skipping, as well as to reduced frequency operation at lower power levels. At low power levels, the PFC switches off to maintain high efficiency.

During low power conditions, the flyback controller switches to frequency reduction mode and limits the peak current to 25 pct of its maximum value. This will ensure high efficiency at low power and good standby power performance while minimizing audible noise from the transformer.

The TEA1751(L)T is a MultiChip Module, (MCM), containing 2 chips. The proprietary high voltage BCD800 process which makes direct start-up possible from the rectified universal mains voltage in an effective and green way. The second low voltage Silicon On Insulator (SIOI) is used for accurate, high speed protection functions and control.

The TEA1751(L)T enables highly efficient and reliable supplies with power requirements up to 250 W, to be designed easily and with a minimum number of external components.

Features

Distinctive features

  • Integrated PFC and flyback controller.
  • Universal mains supply operation (70 VAC to 276 VAC).
  • Dual boost PFC with accurate maximum output voltage (NXP patented).
  • High level of integration, resulting in a very low external component count and a cost-effective design.

Green features

  • On-chip start-up current source.

PFC green features

  • Valley/zero voltage switching for minimum switching losses (NXP patented).
  • Frequency limitation to reduce switching losses.
  • PFC is switched off when a low load is detected at the flyback output.

Flyback green features

  • Valley switching for minimum switching losses (NXP patented).
  • Frequency reduction with fixed minimum peak current at low power operation to maintain high efficiency at low output power levels.

Protection features

  • Safe restart mode for system fault conditions.
  • Continuous mode protection by means of demagnetization detection for both converters (NXP patented).
  • UnderVoltage Protection (UVP) (foldback during overload).
  • Accurate OverVoltage Protection (OVP) for both converters (adjustable for flyback converter).
  • Mains voltage independent OverPower Protection (OPP)
  • Open control loop protection for both converters. The open loop protection on the flyback converter is latched on the TEA1751L and safe restart on the TEA1751.
  • IC overtemperature protection.
  • Low and adjustable OverCurrent Protection (OCP) trip level for both converters.
  • General purpose input for latched protection, e.g. to be used for system OverTemperature Protection (OTP).

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
TEA1751LT/N1TEA1751LT/N1,5189352 865 59518Volume productionSOT109Reel Dry Pack, SMD, 13"Standard Marking
TEA1751T/N1TEA1751T/N1,5189352 862 83518Volume productionSOT109Reel Dry Pack, SMD, 13"Standard Marking

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
TEA1751LT/N1TEA1751LT/N1,518TEA1751LT_N1
Always Pb-free
TEA1751T/N1TEA1751T/N1,518TEA1751T_N1
Always Pb-free

Quality and reliability disclaimer

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
TEA1751LT/N19352 865 59518  TEA1751LT/N1,518  ASIASAC - Taiwanyes250011/07/2009Buy onlinenot available
    ASIASACL - Hong Kong/Chinayes250011/07/2009Buy online 
    ASIAWPI15,000250011/06/2009Buy online 
    NADIGI-KEY CORPORATION500 11/6/2009Buy online 
TEA1751T/N19352 862 83518  TEA1751T/N1,518  ASIASAC - Taiwanyes250011/07/2009Buy onlinenot available
    ASIASACL - Hong Kong/Chinayes250011/07/2009Buy online 
    ASIAWPI2,500250011/06/2009Buy online 
    NADIGI-KEY CORPORATION500 11/6/2009Buy online 

Applications

  • The device can be used in all applications that require an efficient and cost-effective power supply solution up to 250 W. Notebook adapters in particular can benefit from the high level of integration.


Related applications
High efficiency Notebook PC power supply

Block diagrams/pinning

Parametrics/similar products

Type numberPackageDescriptionPackage reference codeVDD [max](V)Remark
TEA1751LT/N1SOT109
GreenChip ™ III SMPS control ICSO1638.0Flyback/PFC


Similar products
TEA1751T; TEA1751LT links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.