TEA1995T Datasheet PDF - NXP

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TEA1995T
NXP

Part Number TEA1995T
Description GreenChip dual synchronous rectifier controller
Page 17 Pages


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TEA1995T
GreenChip dual synchronous rectifier controller
Rev. 1 — 30 July 2015
Product data sheet
1. General description
The TEA1995T is the first product of a new generation of Synchronous Rectifier (SR)
controller ICs for switched mode power supplies. It incorporates an adaptive gate drive
method for maximum efficiency at any load.
The TEA1995T is a dedicated controller IC for synchronous rectification on the secondary
side of resonant converters. It has two driver stages for driving the SR MOSFETs, which
rectify the outputs of the central tap secondary transformer windings. The two gate driver
stages have their own sensing inputs and operate independently.
The TEA1995T can also be used in multi-output flyback converters with the SR MOSFET
placed at the low side.
The TEA1995T is fabricated in a Silicon-On-Insulator (SOI) process.
2. Features and benefits
2.1 Efficiency features
Adaptive gate drive for maximum efficiency at any load
Supply current in energy save operation below 200 A
2.2 Application features
Wide supply voltage range from 4.5 V to 38 V
Dual synchronous rectification for LLC resonant in SO8 package
Synchronous rectification for multi-output flyback converters
Supports 5 V operation with logic level SR MOSFETs
Differential inputs for sensing the drain and source voltages of each SR MOSFET
2.3 Control features
SR control without minimum on-time
Adaptive gate drive for fast turn-off at the end of conduction
UnderVoltage LockOut (UVLO) protection with active gate pull-down



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TEA1995T
GreenChip dual synchronous rectifier controller
3. Applications
The TEA1995T is intended for resonant power supplies. In such applications, it can drive
two external synchronous rectifier MOSFETs for the rectification of the voltages on the two
secondary windings of the transformer. These MOSFETs replace diodes. It can be used in
all power supplies requiring high efficiency:
Adapters
Power supplies for desktop PC and all-in-one PC
Power supplies for television
Power supplies for servers
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
TEA1995T/N1
SO8
plastic small outline package; 8 leads; body width 3.9 mm
Version
SOT96-1
TEA1995T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 July 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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5. Block diagram
TEA1995T
GreenChip dual synchronous rectifier controller
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Fig 1. TEA1995T block diagram
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TEA1995T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 July 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
3 of 17



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6. Pinning information
6.1 Pinning
TEA1995T
GreenChip dual synchronous rectifier controller
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Fig 2. TEA1995T pin configuration (SO8)
6.2 Pin description
Table 2.
Symbol
GDB
GND
DSB
SSB
SSA
DSA
VCC
GDA
Pin description
Pin
1
2
3
4
5
6
7
8
Description
gate drive output MOSFET B
ground
drain sense input for synchronous timing MOSFET B
source sense input MOSFET B
source sense input MOSFET A
drain sense input for synchronous timing MOSFET A
supply voltage
gate drive output MOSFET A
TEA1995T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 July 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
4 of 17



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