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.

• 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