8-Pin High-Performance Resonant Mode LLC Controller - UCC25600

UCC25600 (ACTIVE)

8-Pin High-Performance Resonant Mode LLC Controller

 

Description

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.

Features

  • 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 Protection
  • 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

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Parametrics Compare all products in PWM and Resonant Controller

 
Topology
Control Method
Vin (Min) (V)
Vin (Max) (V)
Frequency (Max) (kHz)
Duty Cycle (Max) (%)
Gate Drive (Typ) (A)
Features
Rating
Operating Temperature Range (C)
Pin/Package
UCC25600 UCC256301 UCC256302 UCC256303 UCC256304
Half-Bridge
Resonant LLC   
Half-Bridge
Resonant LLC   
Half-Bridge
Resonant LLC   
Half-Bridge
Resonant LLC   
Half-Bridge
Resonant LLC   
Voltage    Current    Current    Current    Current   
370           
410    600    600    600    600   
350    1000    1000    1000    1000   
50    50    50    50    50   
0.8    0.6    0.6    0.6    0.6   
  HV Start-up
Light Load Efficiency
Thermal Shutdown
Wide DC input
X cap discharge integrated   
HV Start-up
Light Load Efficiency
Thermal Shutdown   
Light Load Efficiency
Supports external bias
Thermal Shutdown   
HV Start-up
Light Load Efficiency
Thermal Shutdown
Wide AC input
Wide DC input
X cap discharge integrated   
Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
8SOIC    14SOIC    14SOIC    14SOIC    14SOIC