NXP Semiconductors

TEA2095T

GreenChip dual synchronous rectifier controller

TEA2095T

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Product data sheet

Rev. 1.1 — 10 April 2020

5 / 19

8 Functional description

8.1 Introduction

The TEA2095T is a controller IC for synchronous rectification. It is perfectly suited to

be used in resonant applications. It can drive two synchronous rectifier MOSFETs on

the secondary side of the central tap transformer winding. Figure 3 shows a typical

configuration.

aaa-016991

DSA

GDA

SSA

DSB

GDB

SSB

GND

Qprim1

CHB

Qprim2

Qsec1

PRIMARY

SIDE

CONTROLLER

IC

TR

IC1

Qsec2

Cout

Figure 3. TEA2095T typical configuration

UVLO state. The SR MOSFET gate driver outputs are actively kept low. For proper

gate driver currents, the extra capacitor must be connected as close as possible to the

IC.

8.3 Drain sense (DSA and DSB pins)

The drain sense pins are input pins capable of handling input voltages up to 120 V.

At positive drain sense voltages, the gate driver is in off-mode with pulled-down gate

driver pins (pins GDA or GDB). At negative drain sense voltages, the IC enables the SR

through sensing the drain source differential voltage.