LM5039
www.ti.com SNVS621D – FEBRUARY 2010 – REVISED MARCH 2013 LM5039 Half-Bridge PWM Controller with Average Current Limit
Check for Samples: LM5039 FEATURES DESCRIPTION The LM5039 Half-Bridge Controller/Gate Driver
contains all of the features necessary to implement
half-bridge topology power converters using voltage
mode control with line voltage feed-forward. The
LM5039 is a functional variant of the LM5035B halfbridge PWM controller, featuring average current limit
during an overload event to balance the center-point
of the half-bridge capacitor divider. The floating highside gate driver is capable of operating with supply
voltages up to 105V. Both the high-side and low-side
gate drivers are capable of 2A peak. An internal high
voltage startup regulator is included, along with
programmable line undervoltage lockout (UVLO). The
oscillator is programmed with a single resistor to
frequencies up to 2MHz. The oscillator can also be
synchronized to an external clock. A current sense
input provides peak cycle-by-cycle and average
current limit. Other features include adjustable hiccup
mode overload protection, soft-start, revision
reference, and thermal shutdown. 1 2 105V / 2A Half-Bridge Gate Drivers
Synchronous Rectifier Control Outputs with
Programmable Delays
High Voltage (105V) Start-up Regulator …
