GreenChip Synchronous Rectifier Controller

TEA1999TK

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The TEA1999TK is a member of a new generation of Synchronous Rectifier (SR) controller ICs for switched mode power supplies with adaptive gate drive for maximum efficiency at any load.

The TEA1999TK is a dedicated controller IC for synchronous rectification on the secondary side of flyback converters. It incorporates the sensing stage and driver stage for driving the SR MOSFET, which is rectifying the output of the secondary transformer winding.

The TEA1999TK can generate its own supply voltage for battery charging applications with low output voltage or for applications with high-side rectification.

The TEA1999TK is fabricated in a Silicon-On-Insulator (SOI) process.

Product Details

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Features

Efficiency features

  • Adaptive gate drive for maximum efficiency at any load
  • Typical supply current in no-load operation below 250 µA

Application features

  • Operates in an output voltage range between 18 V and 0 V
  • Drain sense pin capable of handling input voltages up to 100 V
  • Self-supplying for operation with a low output voltage
  • Self-supplying for high-side rectification without the use of an auxiliary winding
  • Operates with standard and logic level SR MOSFETs
  • Supports USB BC, QuickCharge and smart charging applications
  • HVSON8 package

Control features

  • Adaptive gate drive for fast turn-off at the end of the conduction
  • Undervoltage LockOut (UVLO) with active gate pull-down
  • Blanking input for low and high switching frequency
  • Enable input for CCM operation and for disabling at start-up or shorted output

Design Resources

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