IC CTRLR GREENCHIP SYNC 8-SOIC

TEA1761T/N2,118

Manufacturer Part NumberTEA1761T/N2,118
DescriptionIC CTRLR GREENCHIP SYNC 8-SOIC
ManufacturerNXP Semiconductors
SeriesGreenChip™
TEA1761T/N2,118 datasheet
 


Specifications of TEA1761T/N2,118

ModeDiscontinuous Conduction (DCM)Frequency - Switching125kHz
Current - Startup60µAVoltage - Supply8.6 V ~ 38 V
Operating Temperature-20°C ~ 150°CMounting TypeSurface Mount
Package / Case8-SOIC (3.9mm Width)Output Voltage10 V
Output Current5 mAInput Voltage8.6 V to 38 V
Supply Current1 mAMounting StyleSMD/SMT
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names935284211118
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TEA1761T
GreenChip synchronous rectifier controller
Rev. 02 — 25 April 2007
1. General description
The TEA1761T 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 TEA1761T 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 TEA1761T is fabricated in a Silicon On Insulator (SOI) process. This NXP SOI
process makes possible a wide range of operation.
2. Features
2.1 Distinctive features
I
Combined synchronous rectification and primary feedback control functionality
I
Wide supply voltage range (8.6 V to 38 V)
I
High level of integration, resulting in a very low external component count
I
Wide opto coupler output voltage range (3.5 V to 38 V)
I
Accurate internal voltage reference for voltage control (within 1 %)
I
High driver output voltage of 10 V to drive all MOSFET brands to the lowest R
2.2 Green features
I
Low current consumption
I
High system efficiency from no load to full load
2.3 Protection features
I
Undervoltage protection
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Internal over-temperature protection
3. Applications
The TEA1761T 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.
Product data sheet
DSon

TEA1761T/N2,118 Summary of contents

  • Page 1

    TEA1761T GreenChip synchronous rectifier controller Rev. 02 — 25 April 2007 1. General description The TEA1761T is a member of the new generation of Synchronous Rectifier (SR) controller ICs for switched mode power supplies. Its high level of integration allows ...

  • Page 2

    ... NXP Semiconductors 4. Ordering information Table 1. Ordering information Type number Package Name TEA1761T/N2 SO8 5. Block diagram OPTO SRSENSE DRIVER Fig 1. TEA1761T block diagram TEA1761T_2 Product data sheet Description plastic small outline package; 8 leads; body width 3 control Q R TIMER 2 n.c. GND Rev. 02 — 25 April 2007 TEA1761T GreenChip synchronous rectifi ...

  • Page 3

    ... NXP Semiconductors 6. Pinning information 6.1 Pinning Fig 2. Pin configuration for TEA1761T 6.2 Pin description Table 2. Symbol SRSENSE GND n.c. DRIVER OPTO VSENSE ISENSE Functional description The TEA1761T is the controller for synchronous rectification to be used in discontinuous conduction mode and quasi resonant flyback converters. Besides controlling the SR MOSFET, the TEA1761T contains the voltage reference and amplifi ...

  • Page 4

    ... NXP Semiconductors driver output is pulled to ground. After switch-on of the SR MOSFET, the input signal on the SRSENSE pin is blanked for 2 s (typical). This will eliminate false switch-off due to high frequency ringing at the start of the secondary stroke. Because the driver output voltage is reduced as soon as the voltage on the SRSENSE pin is 55 mV, the external power switch can be switched off fast when the current through the switch reaches zero ...

  • Page 5

    ... NXP Semiconductors 7.4 Opto output The opto output is intended to drive an opto coupler (see an open-drain output configuration. The maximum sink current is internally limited (typical). The output is linearly controlled via the V over-temperature situation will switch the opto output to its maximum sink current. ...

  • Page 6

    ... NXP Semiconductors 8. Limiting values Table 3. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are measured with respect to ground (pin 2); positive currents flow into the chip. The voltage ratings are valid provided other ratings are not violated; current ratings are valid provided the other ratings are not violated ...

  • Page 7

    ... NXP Semiconductors Fig 4. Typical regulated V 10. Characteristics Table 5. Characteristics all voltages are measured with respect to ground (pin 2); currents are positive when flowing into amb CC the IC; unless otherwise specified. Symbol Parameter Supply voltage management (pin V V start-up voltage startup V hysteresis voltage ...

  • Page 8

    ... NXP Semiconductors Table 5. Characteristics …continued all voltages are measured with respect to ground (pin 2); currents are positive when flowing into amb CC the IC; unless otherwise specified. Symbol Parameter Opto output (pin OPTO) I maximum output current V O(max) V minimum output voltage O(min) Voltage sense (pin VSENSE) ...

  • Page 9

    ... NXP Semiconductors Vin Fig 5. Application example TEA1761T 12. Test information 12.1 Quality information The General Quality Specification for Integrated Circuits, SNW-FQ-611 is applicable. TEA1761T_2 Product data sheet Ropto OPTO TR Rsrsense Qprim Qsec PRIMARY SIDE CONTROLLER Rev. 02 — 25 April 2007 TEA1761T GreenChip synchronous rectifier controller ...

  • Page 10

    ... NXP Semiconductors 13. Package outline SO8: plastic small outline package; 8 leads; body width 3 pin 1 index 1 DIMENSIONS (inch dimensions are derived from the original mm dimensions) A UNIT max. 0.25 1.45 mm 1.75 0.25 0.10 1.25 0.010 0.057 inches 0.069 0.01 0.004 0.049 Notes 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. ...

  • Page 11

    ... Added footnote • Soldering section removed. • The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. • Legal texts have been adapted to the new company name where appropriate. TEA1761T_1 20060331 TEA1761T_2 Product data sheet GreenChip synchronous rectifi ...

  • Page 12

    ... For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail ...

  • Page 13

    ... NXP Semiconductors 17. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.1 Distinctive features . . . . . . . . . . . . . . . . . . . . . . 1 2.2 Green features . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.3 Protection features . . . . . . . . . . . . . . . . . . . . . . 1 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 Functional description . . . . . . . . . . . . . . . . . . . 3 7.1 Start-up and undervoltage lock out 7.2 Synchronous rectifi ...