tea1791at NXP Semiconductors, tea1791at Datasheet
tea1791at
Available stocks
Related parts for tea1791at
tea1791at Summary of contents
Page 1
... High system efficiency from no load to full load 2.3 Protection features Undervoltage protection 3. Applications The TEA1791AT is intended for adapters. The device can also be used in all other discontinuous conduction mode systems and quasi-resonant flyback systems that demand a highly efficient and cost-effective solution. 4. Ordering information Table 1 ...
Page 2
... All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller −310 mV − GND n.c. TEA1791AT n.c. 014aaa894 −55 mV 014aaa893 © NXP B.V. 2010. All rights reserved ...
Page 3
... NXP Semiconductors 7. Functional description 7.1 Introduction The TEA1791AT is the controller for synchronous rectification to be used in discontinuous conduction mode and quasi-resonant flyback converters. 7.2 Start-up and UnderVoltage LockOut (UVLO) The IC leaves the undervoltage lockout state and activates the synchronous rectifier circuitry as soon as the voltage on the V voltage drops below 8 ...
Page 4
... When the timer has finished, the source capability is reduced to a < startup All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller ).The output voltage of the driver act(sr)(min) ) and undervoltage lockout the driver output 0 V − ...
Page 5
... Thermal characteristics Parameter thermal resistance from junction to ambient thermal resistance from junction to case All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller Min Max −0.4 +38 - 120 −0.8 +3 −3 - < ...
Page 6
... Long time voltage on pin DRIVER = voltage on pin DRIVER = 2 V voltage on pin DRIVER = 9 hys All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller Min Typ Max 8.2 8.5 8.8 [ 0.95 - − ...
Page 7
... NXP Semiconductors 11. Application information A switched mode power supply with the TEA1791AT consists of a primary side discontinuous conduction mode flyback controller, a transformer, and an output stage with a feedback circuit. A MOSFET (Q stage. This MOSFET is controlled by the TEA1791AT. The timing for the synchronous rectifier switch is derived from the voltage sensed on the SRSENSE pin ...
Page 8
... All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller VCC SRSENSE SRSENSE R SRSENSE2 TEA1791AT DRIVER Q sec2 DRIVER IC1 GND V out VCC C out TEA1791AT IC2 GND 014aaa895 © NXP B.V. 2010. All rights reserved ...
Page 9
... REFERENCES JEDEC JEITA MS-012 All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller θ detail ...
Page 10
... NXP Semiconductors 13. Revision history Table 6. Revision history Document ID Release date TEA1791AT v.1 20100607 TEA1791AT Product data sheet GreenChip synchronous rectifier controller Data sheet status Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT Change notice ...
Page 11
... Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller © NXP B.V. 2010. All rights reserved ...
Page 12
... Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. GreenChip — trademark of NXP B.V. http://www.nxp.com salesaddresses@nxp.com All information provided in this document is subject to legal disclaimers. Rev. 01 — 7 June 2010 TEA1791AT GreenChip synchronous rectifier controller © NXP B.V. 2010. All rights reserved ...
Page 13
... Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2010. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com All rights reserved. Date of release: 7 June 2010 Document identifier: TEA1791AT ...