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LM5035AMH Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM5035AMH
Description  PWM Controller with Integrated Half-Bridge and SyncFET PWM Controller with Integrated Half-Bridge and SyncFET
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM5035AMH Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM5035A/LM5035A-1
July 30, 2010
PWM Controller with Integrated Half-Bridge and SyncFET
Drivers
General 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 sup-
ply voltages up to 105V. Both the high-side and low-side gate
drivers are capable of 2A peak. An internal high voltage start-
up regulator is included, along with programmable line un-
dervoltage lockout (UVLO) and overvoltage protection (OVP).
The oscillator is programmed with a single resistor to fre-
quencies up to 2MHz. The oscillator can also be synchronized
to an external clock. A current sense input and a pro-
grammable timer provide cycle-by-cycle current limit and ad-
justable hiccup mode overload protection. The differences
between LM5035, LM5035A, LM5035B, and LM5035C are
summarized in Table 2.
Features
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
TSSOP-20EP
LLP-24 (4mm x 5mm)
TSSOP-28EP (LM5035A-1 only)
Simplified Application Diagram
30034101
© 2010 National Semiconductor Corporation
300341
www.national.com


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