LM5034_15 Datasheet, PDF (1/36 Pages) Texas Instruments – High Voltage Dual Interleaved Current Mode Controller with Active Clamp

LM5034
www.ti.com
SNVS347A – FEBRUARY 2005 – REVISED APRIL 2013
LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp
Check for Samples: LM5034
FEATURES
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•2 Two Independent PWM Current Mode
Controllers
• Integrated High Voltage Startup Regulator
• Compound 2.5A Main Output Gate Drivers
• Single Resistor Oscillator Setting to 2 MHz
• Synchronizable Oscillator
• Active Clamp Gate Driver for P-Channel
MOSFETs
• Adjustable Gate Drive Overlap Time
• Programmable Maximum Duty Cycle
• Maximum Duty Cycle Fold-Back at High Line
Voltage
• Adjustable Timer for Hiccup Mode Current
Limiting
• Integrated Slope Compensation
• Adjustable Line Under-Voltage Lockout
• Independently Adjustable Soft-Start (Each
Regulator)
• Direct Interface with Opto-Coupler Transistor
• Thermal Shutdown
Typical Application Circuit
APPLICATIONS
• Telecommunication Power Converters
• Industrial Power Converters
• +42V Automotive Systems
DESCRIPTION
The LM5034 dual current mode PWM controller
contains all the features needed to control either two
independent forward/active clamp dc/dc converters or
a single high current converter comprised of two
interleaved power stages. The two controller
channels operate 180° out of phase thereby reducing
input ripple current. The LM5034 includes a startup
regulator that operates over a wide input range up to
100V and compound (bipolar + CMOS) gate drivers
that provide a robust 2.5A peak sink current. The
adjustable dead-time of the active clamp gate drivers
and adjustable maximum PWM duty cycle reduce
stress on the primary side MOSFET switches.
Additional features include programmable line under-
voltage lockout, cycle-by-cycle current limit, hiccup
mode fault operation with adjustable restart delay,
PWM slope compensation, soft-start, and a 2 MHz
capable oscillator with synchronization capability.
PACKAGE
• TSSOP-20
36V to 75V
Input
Sync
VPWR
VIN
LM5034 ^CS1
UVLO
RES
OUT1
AC1
RT
DCL
COMP1
VCC
3.3V
ERROR AMP
& ISOLATION
2.5V
VCC1
VCC2
SS2
SS1
OVLP
GND1
GND2
CS2
OUT2
AC2
COMP2
ERROR AMP
& ISOLATION
Figure 1. Dual Interleaved Regulators with Independent Outputs
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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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