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1FEATURES

? LLC Resonant Switching Driver Controller for

Multi-String LED Lighting Applications

? 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 TPS92023 is a high-performance resonantswitching

LED driver controller. It is designed for use

in higher power LED lighting systems. The TPS92023

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 TPS92023 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 380 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.