LM5035B_15 Datasheet, PDF (1/36 Pages) Texas Instruments – LM5035B PWM Controller with Integrated Half-Bridge and SyncFET Drivers

LM5035B
www.ti.com
SNVS613C – JULY 2009 – REVISED APRIL 2013
LM5035B PWM Controller with Integrated Half-Bridge and SyncFET Drivers
Check for Samples: LM5035B
FEATURES
1
•2 105V / 2A Half-Bridge Gate Drivers
• Synchronous Rectifier Control Outputs with
Programmable Delays
• Synchronous Rectifiers Turned Off in
Shutdown Modes.
• 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
• 5V Reference Output
PACKAGES
• TSSOP-20
• WQFN-24 (4mm x 5mm)
DESCRIPTION
The LM5035B 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 LM5035B is a functional variant of the LM5035A
half-bridge PWM controller. The LM5035B provides
higher maximum duty cycle and higher start-up
regulator output current than the LM5035A or
LM5035. Also, the Synchronous Rectifier drive
outputs of the LM5035B are held low in shutdown
modes.
The LM5035, LM5035A, and LM5035B 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 2.
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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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