Smart Rectifier™ ICs: Simple, high efficiency Synch Rec

For designers of high power flyback and resonant ½ bridge converters for laptops, mini-PCs, LCD & PDP TVs and games SMPS, the Smart Rectifier™ offers a simple, high efficiency solution for secondary synchronous rectification (SR) in all operational modes and application conditions.

The IR1167 and IR1166 are secondary control ICs with built-in 7A and 3A (respectively) gate drive. Operating independently from the primary side, it uses a proprietary ‘Voltage Level Detection’ technique to minimize wasteful secondary reactive currents to maximize secondary efficiency.

The proprietary 200V HVIC technology allows direct sensing and control of IR’s world-class range of Standard- or Logic-Level, 30-200V HEXFET MOSFETs.

Flyback Example

THE IR ADVANTAGE
Simple, powerful solution
Enables
  • Higher efficiency
  • Higher Power density
  • Faster time to market
  • Complies with CEC 80plus and 1W standby requirements
    Proprietary Voltage Level Detection and 200V HVIC technology
    Direct connection and drive to all 30-200V MOSFETs
    Fast, powerful (7A), Accurate, high efficiency operation up to 500kHz (IR1167)
    Independent from primary side
    Operates in all modes
    In 120W laptop adaptor, enables
  • 1% efficiency increase
  • 10°C lower temperature
  • 75% fewer SR components
  • 20% lower SR system cost
  • Enables ‘no heatsink’ SR designs

    Old Current Transformer vs. New Smart Rectifier™
    120W Laptop Adaptor
    (VOUT=19.5V, IOUT=6.15A, Full Load, 110VACIN, TAMB=45°C)
    120W Laptop adaptor (19.5V, 6.15A) with current transformer (CT) and TO-220 SR FETs. Smart Rectifier shows 1% efficiency improvement and 10°C lower FET temperature with same heatsinking. Allows reduction in SR FETs to allow system cost reductions.
    SPECIFICATIONS
    Part Number Package
    VCC VFET Sw Freq. max. Gate Drive +/- VGATE Clamp Sleep Current max.
    IR1166SPbF SO-8 20V <=200V 500kHz +1 / -3.5 10.7V 200µA
    IR1167ASPbF SO-8 20V <=200V 500kHz +2 / -7 10.7V 200µA
    IR1167BSPbF 14.5V
    IR1167APbF DIP-8 10.7V
    IR1167BPbF 14.5V

    IR1167 can be used with IR’s HEXFET Power MOSFETs to provide the ultimate Smart Rectifier chip-set solutions.

    APPLICATION EXAMPLE:
    120W Laptop adaptor (Sony, 16.5V, 6.15A)
    ‘No heatsink’ redesign
    • No manual assembly
    • Less space needed… can redesign to increase power density!
    Design Tools