LM5034_14 Datasheet, PDF (1/35 Pages) Texas Instruments – High Voltage Dual Interleaved Current Mode Controller with Active Clamp

LM5034
www.ti.com
SNVS347 – FEBRUARY 2005
LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp
Check for Samples: LM5034
FEATURES
1
•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
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.
Packages
• TSSOP-20
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 © 2005, Texas Instruments Incorporated