LM5039
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SNVS621D –FEBRUARY 2010–REVISED MARCH 2013
LM5039 Half-Bridge PWM Controller with Average Current Limit
Check for Samples: LM5039
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FEATURES
DESCRIPTION
The LM5039 Half-Bridge Controller/Gate Driver
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• 105V / 2A Half-Bridge Gate Drivers
contains all of the features necessary to implement
• Synchronous Rectifier Control Outputs with
half-bridge topology power converters using voltage
Programmable Delays
mode control with line voltage feed-forward. The
• High Voltage (105V) Start-up Regulator
LM5039 is a functional variant of the LM5035B half-
bridge PWM controller, featuring average current limit
• Voltage-mode Control with Line Feed-Forward
during an overload event to balance the center-point
and Volt • Second Limiting
of the half-bridge capacitor divider. The floating high-
• Programmable Average Current Limit
side gate driver is capable of operating with supply
Balances the Half-Bridge Capacitor Divider
voltages up to 105V. Both the high-side and low-side
Voltage in an Overload Condition
gate drivers are capable of 2A peak. An internal high
voltage startup regulator is included, along with
• Programmable Hiccup Mode Timer Reduces
programmable line undervoltage lockout (UVLO). The
Power Dissipation During a Continuous
oscillator is programmed with a single resistor to
Overload Event
frequencies up to 2MHz. The oscillator can also be
• Adjustable Peak Cycle-by-Cycle Over Current
synchronized to an external clock. A current sense
Protection
input provides peak cycle-by-cycle and average
current limit. Other features include adjustable hiccup
• Resistor Programmed, 2MHz Capable
mode overload protection, soft-start, revision
Oscillator
reference, and thermal shutdown.
• Patented Oscillator Synchronization
• Programmable Line Under-Voltage Lockout
• Internal Thermal Shutdown Protection
• Adjustable Soft-Start
• Direct Opto-Coupler Interface
• 5V Reference Output
PACKAGES
• HTSSOP-20 (Thermally enhanced)
• WQFN-24 (4mm x 5mm)
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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