8

GD1

5

GD2

7

VCC

6

GND

3

2

1

4

OC

RT

DT

SS

UCC25600

+

V

S

UCC25600

www.ti.com

SLUS846B

– SEPTEMBER 2008 – REVISED JULY 2011

8-Pin High-Performance Resonant Mode Controller

Check for Samples: UCC25600

1

FEATURES

DESCRIPTION

•

Variable Switching Frequency Control

The UCC25600 high performance resonant mode

•

Programmable Minimum Switching Frequency

controller

is

designed

for

dc-to-dc

applications

With 4% Accuracy (3% accuracy at

utilizing resonant topologies, especially the LLC half

temperature range: -20

°C to 105°C)

bridge resonant converter. This highly integrated

•

Programmable Maximum Switching Frequency

controller implements frequency modulation control

•

Programmable Dead Time for Best Efficiency

and complete system functions in only an 8-pin

•

Programmable Soft-Start Time

package. Switching to the UCC25600 will greatly

simplify the system design, layout and improve time

•

Easy ON/OFF Control

to market, all at a price point lower than competitive

•

Over-Current Protection

16-pin device offerings.

•

Over-Temperature Protection

The

internal

oscillator

supports

the

switching

•

Bias Voltage UVLO and OVP

frequencies from 40 kHz to 350 kHz. This high

•

Integrated Gate Driver With 0.4-A Source and

accuracy oscillator realizes the minimum switching

0.8-A Sink Capability

frequency limiting with 4% tolerance, allowing the

•

Operating Temperature Range:

–40°C to 125°C

designer to avoid

"over design" of the power stage

•

SOIC 8-Pin Package

and, thus, further reducing overall system cost. The

programmable

dead

time

enables

zero-voltage

switching with minimum magnetizing current. This will

APPLICATIONS

maximize system efficiency across a variety of

•

100-W to 1-kW Power Supplies

applications.

The

programmable

soft-start

timer

•

LCD, Plasma and DLP

® TVs

maximizes design flexibility demanded by the varied

•

Adaptors, Computing and ATX Power Supplies

requirements of end equipments utilizing a half bridge

topology. By incorporating 0.4-A source and 0.8-A

•

Home Audio Systems

sink driving capability, a low cost, reliable gate driver

•

Electronic Lighting Ballasts

transformer is a real option.

The UCC25600 delivers complete system protection

functions including over current, UVLO, bias supply

OVP and over temperature protection.

TYPICAL APPLICATION DIAGRAM

1

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.

Copyright

© 2008–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.