TEA1995T | GreenChip Dual Synchronous Rectifier Controller | NXP Semiconductors

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GreenChip Dual Synchronous Rectifier (SR) Controller

TEA1995T Active

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The TEA1995T is the first product of a new generation of synchronous rectifier (SR) controller ICs for switched mode power supplies with adaptive gate drives, providing maximum efficiency at any load.

The TEA1995T is a dedicated controller IC for synchronous rectification on the secondary side of resonant converters. This synchronous rectifier controller has a vast supply voltage range (4.5-38V) and comes equipped with two driver stages for the SR MOSFETs, which rectify the outputs of the secondary transformer windings. The two gate driver stages also have their own sensing inputs and operate independently of each other.

The TEA1995T is intended for resonant power supplies. In such applications, this SR controller can drive two external synchronous rectifier MOSFETs that replace diodes for the rectification of the voltages on the two secondary windings of the transformer.

Fabricated in a Silicon On Insulator (SOI) process, the TEA1995T can be used in all power supplies needing high-efficiency, including the power supplies for PCs, adapters, TVs, and servers. Additionally, consumers can use the TEA1995T in multi-output flyback converters with the SR MOSFET placed at the low side.

Block Diagram

TEA1995T Block Diagram

TEA1995T Block Diagram
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Features

Efficiency features

  • Adaptive gate drive for maximum efficiency at any load
  • Supply current in no-load operation below 200 μA

Application features

  • Very 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 5V operation with logic level SR MOSFETs
  • Differential inputs for sensing the drain and source voltage of each SR MOSFET

Control features

  • SR control without minimum on-time
  • Adaptive gate drive for fast turn-off at the end of the conduction
  • Under voltage lockout with active gate pull-down

NXP GreenChip

  • This product is part of the NXP GreenChip portfolio, this program optimizes for energy efficiency in mobile and computing applications, specializing in high-power density, safety and reliability.

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TEA1995T
Data Sheet

SO8

0

-400

-55

150

80

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