LM5035C

UVLO

AGND

PGND

COMP

HO

LO

SS

RT

RAMP

VIN

OVP

SR1

SR2

VPWR

ERROR AMP

AND

ISOLATION

VOUT

GATE

DRIVE

ISOLATION

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM5035C

SNVS631D – JANUARY 2010 – REVISED OCTOBER 2016

LM5035C PWM Controller With Integrated Half-Bridge and SyncFET Drivers

1

1 Features

1

•

105-V and 2-A Half-Bridge Gate Drivers

•

Synchronous Rectifier Control Outputs With

Programmable Delays

•

Reduced Dead Time Between High and Low-Side

Drive for Higher Maximum Duty Cycle.

•

High Voltage (105 V) Start-Up Regulator

•

Voltage Mode Control With Line Feedforward and

Volt Second Limiting

•

Resistor Programmed, 2-MHz Capable Oscillator

•

Programmable Line Undervoltage Lockout and

Overvoltage Protection

•

Internal Thermal Shutdown Protection

•

Adjustable Soft Start

•

Versatile Dual Mode Overcurrent Protection With

Hiccup Delay Timer

•

Cycle-by-Cycle Overcurrent Protection

•

Direct Opto-coupler Interface

•

Logic Level Synchronous Rectifier Drives

•

5-V Reference Output

•

Packages:

–

HTSSOP-20 (Thermally Enhanced)

–

WQFN-24 (4mm × 5mm)

2 Applications

•

Industrial Power Converters

•

Telecom Power Converters

3 Description

The LM5035C half-bridge controller and gate driver

contains all of the features necessary to implement

half-bridge topology power converters using voltage

mode control with line voltage feedforward.

The LM5035C is a functional variant of the LM5035B

half-bridge PWM controller. The amplitude of the SR1

and SR2 waveforms are 5 V instead of the VCC 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

105 V. Both the high-side and low-side gate drivers

are capable of 2-A peak. An internal high-voltage

start-up

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 2 MHz. 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 the

Device Comparison Table.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM5035C

HTSSOP (20)

6.50 mm × 4.40 mm

WQFN (24)

5.00 mm × 4.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Application Diagram