UCC25600
www.ti.com
SLUS846B –SEPTEMBER 2008–REVISED JULY 2011
8-Pin High-Performance Resonant Mode Controller
Check for Samples: UCC25600
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FEATURES
DESCRIPTION
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Variable Switching Frequency Control
Programmable Minimum Switching Frequency
With 4% Accuracy (3% accuracy at
The UCC25600 high performance resonant mode
controller is designed for dc-to-dc applications
utilizing resonant topologies, especially the LLC half
bridge resonant converter. This highly integrated
controller implements frequency modulation control
and complete system functions in only an 8-pin
package. Switching to the UCC25600 will greatly
simplify the system design, layout and improve time
to market, all at a price point lower than competitive
16-pin device offerings.
temperature range: -20°C to 105°C)
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Programmable Maximum Switching Frequency
Programmable Dead Time for Best Efficiency
Programmable Soft-Start Time
Easy ON/OFF Control
Over-Current 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
The internal oscillator supports the switching
frequencies from 40 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. The
programmable dead time enables zero-voltage
switching with minimum magnetizing current. This will
maximize system efficiency across a variety of
applications. The programmable soft-start timer
maximizes design flexibility demanded by the varied
requirements of end equipments utilizing a half bridge
topology. By incorporating 0.4-A source and 0.8-A
sink driving capability, a low cost, reliable gate driver
transformer is a real option.
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APPLICATIONS
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100-W to 1-kW Power Supplies
LCD, Plasma and DLP® TVs
Adaptors, Computing and ATX Power Supplies
Home Audio Systems
Electronic Lighting Ballasts
The UCC25600 delivers complete system protection
functions including over current, UVLO, bias supply
OVP and over temperature protection.
TYPICAL APPLICATION DIAGRAM
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UCC25600
GD1 OC
VS
8
5
7
6
3
2
1
4
GD2
VCC
GND
RT
DT
SS
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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.
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