LM5035A_15 Datasheet, PDF (1/40 Pages) Texas Instruments – PWM Controller with Integrated Half-Bridge and SyncFET Drivers

LM5035A
www.ti.com
SNVS537F – JANUARY 2008 – REVISED APRIL 2013
LM5035A/LM5035A-1 PWM Controller with Integrated Half-Bridge and SyncFET Drivers
Check for Samples: LM5035A
FEATURES
1
•2 105V / 2A Half-Bridge Gate Drivers
• Synchronous Rectifier Control Outputs with
Programmable Delays
• High Voltage (105V) Start-up Regulator
• Voltage mode Control with Line Feed-Forward
and Volt • Second Limiting
• Resistor Programmed, 2MHz Capable
Oscillator
• Patent Pending Oscillator Synchronization
• Programmable Line Under-Voltage Lockout
• Line 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
• HTSSOP-20
• WQFN-24 (4mm x 5mm)
• HTSSOP-28 (LM5035A-1 only)
DESCRIPTION
The LM5035A 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
LM5035A is a functional variant of the LM5035 half-
bridge PWM controller. The VCC current limit
threshold has been increased to 35 mA. The soft start
and soft start currents have been increased from 50
µA to 100 µA. The BST UV threshold has been
lowered to less than the VCC UV threshold. The ratio
of the T1 and T2 delays on the SR1 and SR2 outputs
has been increased from 2:1 to 3:1. The floating high-
side 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) 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
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 2008–2013, Texas Instruments Incorporated