LM5034

· 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

· Telecommunication Power Converters
· Industrial Power Converters
· +42V Automotive Systems

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
VIN to GND -0.3V to .......................................105V
VCC to GND -0.3V to ........................................16V
RT/SYNC, RES and DCL to GND ..........-0.3V to 5.5V
CS Pins to GND ................................-0.3V to 1.25V
All other inputs to GND .........................-0.3V to 7V
ESD Rating (Note 5)
Human Body Model ...........................................2kV
Storage Temperature Range ............-55 to 150
Junction Temperature ....................................150
Lead Temperature (Soldering 4 sec),..............260
(Note 2)

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.