LM5039MHX

• 105V/2A half-bridge gate driver
• Synchronous rectification control output with programmable delay
• High voltage (105V) start-up regulator
• Voltage mode controls line-fed and volt-two limits
• Programmable average current limits the residual half-bridge capacitor divider voltage in overload conditions
• A programmable hiccup mode timer reduces power consumption during sustained overload events
• Adjustable peak-by-cycle overcurrent protection
• Resistor programming capable of 2MHz oscillator
• Patented oscillator synchronization
• Programmable input undervoltage lockout
• Internal thermal shutdown protection
• Adjustable soft-start
• Direct optocoupler interface
• 5V reference voltage output

illustrate

The LM5039 half-bridge controller/gate driver contains all the necessary functions to implement a half-bridge topology power converter using line voltage feed-forward voltage mode control. The LM5039 is a functional variant of the LM5035B half-bridge PWM controller with an average current limit during an overload event to balance the center point of the half-bridge capacitive divider. The floating high-side gate driver is capable of operating up to a supply voltage of 105V. The high-side and low-side gate drivers are the peak of 2A. Contains an internal high-voltage start-up regulator with programmable undervoltage lockout (UVLO). Single resistor programming with oscillator frequencies up to 2MHz. The oscillator can also be synchronized to an external clock. The current sense input provides cycle-by-cycle peak and average current limits. Other features include adjustable hiccup mode overload protection, soft start, revision reference, and thermal shutdown.