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1FEATURES

? LLC Resonant Switching Driver Controller for

Multi-String LED Lighting Applications resonant?

Half-Bridge Topology

? Fixed or Variable Switching Frequency Control

? Programmable Soft-Start Time

? Programmable Dead Time for Best Efficiency

? Easy ON/OFF Control

? Overcurrent Protection

? Over-Temperature Protection

? Bias Voltage UVLO and OVP

? Integrated Gate Driver With 0.4-A Source and

0.8-A Sink Capability

? Operating Temperature Range: –40°C to 125°C

? SOIC 8-Pin Package

APPLICATIONS

? Commercial / Industrial LED Lighting Drivers

? High Bay LED Lighting

? Low Bay LED Lighting

? Street LED Lighting

? Area LED Lighting

? Stadium LED Lighting

? LED Wall Washing

? LED DTV and Monitor Back-lighting

? Electronic Lighting Ballasts

DESCRIPTION

The TPS92020 is a high-performance resonant?

switching LED driver controller. It is designed for use

in higher power LED lighting systems. The TPS92020

uses resonant switching in an LLC topology to

achieve a very high efficiency compared to traditional

half-bridge converters.

The programmable dead time enables zero-voltage

switching with minimum magnetizing current,

maximizing system efficiency across a variety of

applications.

The TPS92020 can operate in two switching

frequency modes. Fixed frequency allows for simple

design when the load current is constant while

variable switching allows for optimal closed-loop

control for loads with varying currents. The internal

oscillator supports the switching frequencies from 30

kHz to 350 kHz. This high-accuracy oscillator realizes

the minimum switching frequency limiting with 4%

tolerance, allowing the designer to avoid over-design

of the power stage and, thus, further reducing overall

system cost.