LM5034

February 2005 www.DataSheet4U.com LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp General 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. Features n n n n n n n n n n n n n n n 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 h...