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LM5034 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM5034 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 29 page  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 cur- rent 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 program- mable line under-voltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable restart delay, PWM slope compensation, soft-start, anda2MHz capable oscillator with synchronization capability. Features n Two independent PWM current mode controllers n Integrated high voltage startup regulator n Compound 2.5A main output gate drivers n Single resistor oscillator setting to 2 MHz n Synchronizable oscillator n Active clamp gate driver for P-channel MOSFETs n Adjustable gate drive overlap time n Programmable maximum duty cycle n Maximum duty cycle fold-back at high line voltage n Adjustable timer for hiccup mode current limiting n Integrated slope compensation n Adjustable line under-voltage lockout n Independently adjustable soft-start (each regulator) n Direct interface with opto-coupler transistor n Thermal shutdown Applications n Telecommunication Power Converters n Industrial Power Converters n +42V Automotive Systems Packages n TSSOP-20 Typical Application Circuit 20136801 Dual Interleaved Regulators with Independent Outputs February 2005 © 2005 National Semiconductor Corporation DS201368 www.national.com |
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