SWITCHMODE

NPN Bipolar Power Transistor

For Switching Power Supply Applications

The BUL44/BUL44F have an applications specific state–of–the–art die designed for use in 220 V line operated Switchmode Power supplies and electronic light ballasts. These high voltage/high speed transistors offer the following:

• Improved Efficiency Due to Low Base Drive Requirements:

- High and Flat DC Current Gain hFE

- Fast Switching

- No Coil Required in Base Circuit for Turn–Off (No Current Tail)

• Full Characterization at 125°C

• Tight Parametric Distributions are Consistent Lot–to–Lot

• Two Package Choices: Standard TO–220 or Isolated TO–220

• BUL44F, Case 221D, is UL Recognized to 3500 VRMS: File #E69369