TEA1998TS: GreenChip synchronous rectifier controller

Overview

The TEA1998TS is a member of a new generation of Synchronous Rectifier (SR) controller ICs for switched mode power supplies with adaptive gate drive for maximum efficiency at any load.

The TEA1998TS is a dedicated controller IC for synchronous rectification on the secondary side of flyback converters. It incorporates the sensing stage and driver stage for driving the SR MOSFET, which is rectifying the output of the secondary transformer winding.

The TEA1998TS can generate its own supply voltage for battery charging applications with low output voltage or for applications with high-side rectification.

The TEA1998TS is fabricated in a Silicon-On-Insulator (SOI) process.

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Features

Efficiency features

Adaptive gate drive for maximum efficiency at any load
Typical supply current in no-load operation below 250 µA

Application features

Operates in an output voltage range between 10 V and 0 V
Drain sense pin capable of handling input voltages up to 60 V
Self-supplying for operation with low output voltage
Self-supplying for high-side rectification without the use of an auxiliary winding
Operates with standard and logic level SR MOSFETs
Supports USB BC, QuickCharge and smart charging applications
TSOP6 package

Control features

Adaptive gate drive for fast turn-off at the end of conduction
UnderVoltage LockOut (UVLO) with active gate pull-down

MoreLess

Features

Efficiency features

Adaptive gate drive for maximum efficiency at any load
Typical supply current in no-load operation below 250 µA

Application features

Operates in an output voltage range between 10 V and 0 V
Drain sense pin capable of handling input voltages up to 60 V
Self-supplying for operation with low output voltage
Self-supplying for high-side rectification without the use of an auxiliary winding
Operates with standard and logic level SR MOSFETs
Supports USB BC, QuickCharge and smart charging applications
TSOP6 package

Control features

Adaptive gate drive for fast turn-off at the end of conduction
UnderVoltage LockOut (UVLO) with active gate pull-down

Data Sheets

SOT457

TEA1998TS Block Diagram

SOT457
TEA1998TS Block Diagram

SOT457

TEA1998TS Block Diagram

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Development Boards

TEA1998DB1453:TEA1998TS USB BC1.2 Synchronous Rectifier Controller for Flyback

TEA1936XDB1530: QC4.0/4.0+ 27W Mobile Charging

TEA1936XDBSZ02:QC4.0/4.0+ 18W Mobile Charging

TEA1936xDB1533: USB PD 45W Mobile Charging

Development Boards

TEA1998DB1453:TEA1998TS USB BC1.2 Synchronous Rectifier Controller for Flyback

TEA1936XDB1530: QC4.0/4.0+ 27W Mobile Charging

TEA1936XDBSZ02:QC4.0/4.0+ 18W Mobile Charging

TEA1936xDB1533: USB PD 45W Mobile Charging

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Target Applications

The TEA1998TS is intended for flyback power supplies. In such applications, it can drive the external synchronous rectifier MOSFET, which replaces the diode for the rectification of the voltage on the secondary winding of the transformer.

It can be used in all power supplies that require a high efficiency, like:

Chargers
Adapters
Flyback power supplies with very low and/or variable output voltage