1FEATURES
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 under•
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.

PACKAGE
• TSSOP-20