LM5034 Datasheet | National Semiconductor

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 prised 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 pound (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 pensation, 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 pound 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 pensation Adjustable line under-voltage lockout Independently adjustable soft-start (each regulator) Direct interface with opto-coupler transistor Thermal shutdown Applications n Telemunication Power Converters n Industrial Power Converters n +42V Automotive Systems Packages n TSSOP-20 Typical Application Circuit Dual Interleaved Regulators with Independent Outputs © 2005 National Semiconductor Corporation DS201368 .national. Connection Diagram Top View .. 20-Lead TSSOP Ordering Information Order Number LM5034MTC LM5034MTCX Package Type TSSOP-20 TSSOP-20 NSC Package Drawing MTC-20...