LM5104

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5104 SNVS269D – JANUARY 2004 – REVISED DECEMBER 2014 LM5104 High-Voltage Half-Bridge Gate Driver With Adaptive Delay 1 Features 1 Drives Both a High-Side and Low-Side N-Channel MOSFET Adaptive Rising and Falling Edges With Programmable Additional Delay Single Input Control Bootstrap Supply Voltage Range up to 118-V DC Fast Turnoff Propagation Delay (25 ns Typical) Drives 1000-pF Loads With 15-ns Rise and Fall Times Supply Rail Undervoltage Lockout SOIC and WSON-10 4-mm × 4-mm Package 2 Applications Current Fed Push-Pull Power Converters High Voltage Buck Regulators Active Clamp Forward Power Converters Half-Bridge and Full-Bridge Converters 3 Description The LM5104 High-Voltage Gate Driver is designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck configuration. The floating high-side driver can work with supply voltages up to 100 V. The high-side and low-side gate drivers are controlled from a single input. Each change in state is controlled in an adaptive manner to prevent shoot-through issues. In addition to the adaptive transition timing, an additional delay time can be added, proportional to an external setting resistor. An integrated high-voltage diode is provided to charge high-side gate drive bootstrap capacitor. A robust level shifter operates at high speed while consuming low power and providing clean level transi...