TPS92020 Datasheet, PDF (1/22 Pages) Texas Instruments – Resonant-Switching Driver Controller for LED Lighting

TPS92020
www.ti.com
Resonant-Switching Driver Controller for LED Lighting
Check for Samples: TPS92020
SLUSA54 – JULY 2010
FEATURES
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• 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 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.
UCC28810
1 VSENSE
VDD 8
2 EAOUT
GDRV 7
3 VINS
GND 6
4 ISENSE
TZE 5
TPS92020
Bias
3 OC VCC 7
2 RT
GD1 8
1 DT
GND 6
4 SS
GD2 5
UDG-10043
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated