UCC25600DR

TEXAS INSTRUMENTS

8-pin high-performance resonant mode LLC controller


Download Specifications

Features for the UCC25600

  • Variable switching frequency control
  • Programmable minimum switching frequency with 4% accuracy (3% accuracy at temperature range: –20°C to 105°C)
  • Programmable maximum switching frequency
  • Programmable dead time for best efficiency
  • Programmable soft-start time
  • Easy ON and OFF control
  • Overcurrent Pprotection
  • Overtemperature protection
  • Bias voltage UVLO and overvoltage protection
  • 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

Description for the UCC25600

The UCC25600 high performance, resonant mode controller is designed for dc-to-dc applications using 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 and layout, and improve time to market, all at a price point lower than competitive 16-pin device offerings.

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 maximizes system efficiency across a variety of applications. The programmable soft-start timer maximizes design flexibility demanded by the varied requirements of end equipment using a half-bridge topology. By incorporating a 0.4-A source and 0.8-A sink driving capability, a low cost, reliable gate driver transformer is a real option.

The UCC25600 delivers complete system protection functions including overcurrent, UVLO, bias supply OVP, and overtemperature protection.