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

1

FEATURES

DESCRIPTION

The LM5035C Half-Bridge Controller/Gate Driver

2

•

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.

•

Reduced Deadtime Between High and Low

The LM5035C is a functional variant of the LM5035B

Side Drive for Higher Maximum Duty Cycle.

half-bridge PWM controller. The amplitude of the SR1

•

High Voltage (105V) Start-up Regulator

Also, the soft-stop function is disabled in the

•

Voltage mode Control with Line Feed-Forward

LM5035C.

and Volt Second Limiting

•

Resistor Programmed, 2MHz Capable

The LM5035, LM5035A, LM5035B, and LM5035C

include a floating high-side gate driver, which is

Oscillator

capable of operating with supply voltages up to 105V.

•

Programmable Line Under-Voltage Lockout

Both the high-side and low-side gate drivers are

and Over-Voltage Protection

capable of 2A peak. An internal high voltage startup

•

Internal Thermal Shutdown Protection

regulator is included, along with programmable line

undervoltage

lockout

(UVLO)

and

overvoltage

•

Adjustable Soft-Start

protection (OVP). The oscillator is programmed with a

•

Versatile Dual Mode Over-Current Protection

single resistor to frequencies up to 2MHz. The

with Hiccup Delay Timer

oscillator can also be synchronized to an external

•

Cycle-by-Cycle Over-Current Protection

clock. A current sense input and a programmable

timer

provide

cycle-by-cycle

current

limit

and

•

Direct Opto-coupler Interface

adjustable hiccup mode overload protection. The

•

Logic level Synchronous Rectifier Drives

differences between LM5035, LM5035A, LM5035B,

•

5V Reference Output

and LM5035C are summarized in Table 3.

PACKAGES

•

HTSSOP-20 (Thermally enhanced)

•

WQFN-24 (4mm x 5mm)

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Products conform to specifications per the terms of the Texas

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