LM5033SD

• Two independent PWM current mode controllers
• Integrated high voltage start-up regulator
• Compound 2.5A main output gate driver
• A single-resistor oscillator set to 2 MHz
• Synchronizable oscillator
• Gate driver for active clamped P-channel MOSFETs
• Adjustable gate drive overlap time
• Programmable maximum duty cycle
• The maximum duty cycle with a high foldback line voltage
• Adjustable timer for hiccup mode current limit
• Comprehensive slope compensation
• Adjustable line undervoltage lockout
• Individually Adjustable Soft-Start (per Regulator)
• Direct interface with optocoupler transistors
• Thermal shutdown

illustrate

The LM5034 dual current mode PWM controller controls all the functions required by two independent inactive/active clamped DC/DC converters or one high current converter consisting of two interleaved power stages. The two controller channels operate with a phase of 180°, reducing the input ripple current. The LM5034 includes a start-up regulator operating over a wide input range up to 100V and a composite (bipolar CMOS) gate driver that provides a robust 2.5A peak sink current. The active-clamped gate driver and adjustable PWM maximum duty cycle with adjustable dead time reduce stress on the primary-side MOSFET switch. Other features include programmable line undervoltage lockout, cycle-by-cycle current limit, adjustable hiccup mode restart delay, PWM slope compensation, soft-start, and 2 MHz synchronization capability to enable oscillator fault operation.

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• Communication power converters
• Industrial power converters
• +42 V automotive system