LM5035C_15 Datasheet, PDF (1/35 Pages) Texas Instruments – PWM Controller with Integrated Half-Bridge and SyncFET Drivers

LM5035C
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SNVS631C – JANUARY 2010 – REVISED MARCH 2013
LM5035C PWM Controller with Integrated Half-Bridge and SyncFET Drivers
Check for Samples: LM5035C
FEATURES
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•2 105V / 2A Half-Bridge Gate Drivers
• Synchronous Rectifier Control Outputs with
Programmable Delays
• Reduced Deadtime Between High and Low
Side Drive for Higher Maximum Duty Cycle.
• High Voltage (105V) Start-up Regulator
• Voltage mode Control with Line Feed-Forward
and Volt Second Limiting
• Resistor Programmed, 2MHz Capable
Oscillator
• Programmable Line Under-Voltage Lockout
and Over-Voltage Protection
• Internal Thermal Shutdown Protection
• Adjustable Soft-Start
• Versatile Dual Mode Over-Current Protection
with Hiccup Delay Timer
• Cycle-by-Cycle Over-Current Protection
• Direct Opto-coupler Interface
• Logic level Synchronous Rectifier Drives
• 5V Reference Output
DESCRIPTION
The LM5035C 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 LM5035C is a functional variant of the LM5035B
half-bridge PWM controller. The amplitude of the SR1
and SR2 waveforms are 5V instead of the V_cc level.
Also, the soft-stop function is disabled in the
LM5035C.
The LM5035, LM5035A, LM5035B, and LM5035C
include a floating high-side gate driver, which 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) and overvoltage
protection (OVP). 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 and a programmable
timer provide cycle-by-cycle current limit and
adjustable hiccup mode overload protection. The
differences between LM5035, LM5035A, LM5035B,
and LM5035C are summarized in Table 3.
PACKAGES
• HTSSOP-20 (Thermally enhanced)
• WQFN-24 (4mm x 5mm)
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PRODUCTION DATA information is current as of publication date.
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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