TEA1762T NXP Semiconductors, TEA1762T Datasheet

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TEA1762T

Manufacturer Part Number
TEA1762T
Description
GreenChip synchronous rectifier controller
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
2. Features
2.1 Distinctive features
2.2 Green features
2.3 Protection features
The TEA1762T 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 TEA1762T is a controller IC dedicated for synchronous rectification on the secondary
side of discontinuous conduction mode and quasi resonant flyback converters. Besides
electronics for synchronous rectification, it also has integrated circuitry for output voltage
and output current regulation.
The TEA1762T is fabricated in a Silicon On Insulator (SOI) process. This NXP SOI
process makes possible a wide range of operation.
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TEA1762T
GreenChip synchronous rectifier controller
Rev. 02 — 25 April 2007
Combined synchronous rectification and primary feedback control functionality
Wide supply voltage range (8.6 V to 38 V)
High level of integration, resulting in a very low external component count
Wide opto output voltage range (3.5 V to 38 V)
Accurate internal voltage reference for voltage control (within 1 %)
Separate sense ground for accurate voltage sensing
High driver output voltage of 10 V to drive all MOSFET brands to the lowest R
Reference voltage output pin
Low current consumption
High system efficiency from no load to full load
Undervoltage protection
Internal over-temperature protection
General purpose protection input pin
Product data sheet
DSon

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TEA1762T Summary of contents

Page 1

... Besides electronics for synchronous rectification, it also has integrated circuitry for output voltage and output current regulation. The TEA1762T is fabricated in a Silicon On Insulator (SOI) process. This NXP SOI process makes possible a wide range of operation. 2. Features 2 ...

Page 2

... NXP Semiconductors 3. Applications www.datasheet4u.com I The TEA1762T is intended for adapters. The device can also be used in all other discontinuous conduction mode and quasi resonant flyback systems that demand a highly efficient and cost-effective solution. 4. Ordering information Table 1. Ordering information Type number Package Name TEA1762T SO14 5 ...

Page 3

... Functional description The TEA1762T is the controller for synchronous rectification to be used in discontinuous conduction mode and quasi resonant flyback converters. Besides controlling the SR MOSFET, the TEA1762T contains the voltage reference and amplifiers to regulate and control the output voltage and output current of the power supply. ...

Page 4

... TEA1762T_2 Product data sheet V SRSENSE Primary current Secondary current V DRIVER Rev. 02 — 25 April 2007 TEA1762T GreenChip synchronous rectifier controller Figure 3. © NXP B.V. 2007. All rights reserved. pin 310 ...

Page 5

... Product data sheet GreenChip synchronous rectifier controller < and undervoltage lock-out the outputs are disabled. CC startup pin voltage drops below the V CC Rev. 02 — 25 April 2007 TEA1762T Figure 5). The opto outputs have CC stop level. CC © NXP B.V. 2007. All rights reserved ...

Page 6

... Power ground and sense ground The TEA1762T has two ground connections. The sense ground ensures an increased accuracy of the output voltage of the switched mode power supply and can also be used to compensate for cable losses on the output of the converter. The grounds are internally connected via two anti-parallel diodes ...

Page 7

... Conditions in free air Figure 4 shows the relationship between junction temperature and VSENSE 2600 regulated VSENSE voltage (mV) 2520 2480 2440 2400 Rev. 02 — 25 April 2007 TEA1762T Min Max Unit [2] - 2000 V [3] - 200 V - 500 V Typ Unit 100 K/W 001aae779 ...

Page 8

... V OPTO OPTO Figure VSENSE reg(VSENSE VSENSE OPTOREG w.r.t. power ground; V > 0.4 V POWERGND ISENSE reg(ISENSE ISENSE OPTOPROT Rev. 02 — 25 April 2007 TEA1762T Min Typ Max Unit 8.35 8.6 8.85 V [ 340 310 280 ...

Page 9

... The V stop voltage startup TEA1762T_2 Product data sheet Conditions PROTECT th(PROTECT hys Rev. 02 — 25 April 2007 TEA1762T GreenChip synchronous rectifier controller Min Typ Max 1 1.15 1.25 1. 100 50 140 150 - - 12 - © NXP B.V. 2007. All rights reserved. ...

Page 10

... In the output stage a MOSFET (Qsec) is used for low conduction losses. The MOSFET is controlled by the TEA1762T. The output voltage and/or current is also controlled by the TEA1762T via the opto coupler connection to the primary side. See Figure The output voltage is set by resistors R resistor R sensed on the SRSENSE pin ...

Page 11

... NXP Semiconductors 12. Test information www.datasheet4u.com 12.1 Quality information The General Quality Specification for Integrated Circuits, SNW-FQ-611 is applicable. TEA1762T_2 Product data sheet GreenChip synchronous rectifier controller Rev. 02 — 25 April 2007 TEA1762T © NXP B.V. 2007. All rights reserved ...

Page 12

... 0.49 0.25 8.75 4.0 0.25 1.27 0.36 0.19 8.55 3.8 0.019 0.0100 0.35 0.16 0.244 0.05 0.01 0.014 0.0075 0.34 0.15 0.228 REFERENCES JEDEC JEITA MS-012 Rev. 02 — 25 April 2007 TEA1762T GreenChip synchronous rectifier controller detail 6.2 1.0 0.7 1.05 0.25 0.25 0.1 5.8 0.4 0.6 0.039 0.028 ...

Page 13

... NXP Semiconductors. Legal texts have been adapted to the new company name where appropriate. Objective data sheet Rev. 02 — 25 April 2007 TEA1762T GreenChip synchronous rectifier controller Change notice Supersedes - TEA1762T_1 in Table (voltage and current sense) and T sink - - © NXP B.V. 2007. All rights reserved. ...

Page 14

... Trademarks 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 Rev. 02 — 25 April 2007 TEA1762T © NXP B.V. 2007. All rights reserved ...

Page 15

... 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. 2007. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Document identifier: TEA1762T_2 All rights reserved. Date of release: 25 April 2007 ...

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