Features • 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 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. Applications • Telecommunication Power Converters • Industrial Power Converters • +42V Automotive Systems

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Typical Application click for larger image	Block Diagram *click for larger image
Typical Performance *click for larger image

Datasheet

Title		Size	Date	Other Language
	LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp	1075 Kbytes	15-Feb-05

Featured Application Notes

Title		Size	Date	Other Language
	AN-1370: Application Note 1370 LM5034 Evaluation Board	1036 Kbytes	22-Feb-05
	AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge	230 Kbytes	2-Jul-08
	AN-1574: Application Note 1574 LM5073 Evaluation Board	464 Kbytes	24-Apr-07

More Application Notes

Title		Size	Date	Other Language
	AN-1331: Application Note 1331 LM5033 Evaluation Board	507 Kbytes	27-May-04
	AN-1435: Application Note 1435 LM5035 Evaluation Board	769 Kbytes	31-Jan-06
	AN-1904: Application Note 1904 LM5037 Evaluation Board	294 Kbytes	5-Jan-09
	AN-1305: Application Note 1305 LM5030 Evaluation Board	364 Kbytes	4-Feb-04
	AN-1962: Application Note 1962 LM5032 Interleaved Boost Evaluation Board	2506 Kbytes	27-Aug-09
	AN-1820: Application Note 1820 LM5032 Interleaved Boost Converter	1942 Kbytes	30-May-08

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5034MTC	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5034MTCX	ABCD150XV1	0	3868	0	0	2595000	2	736338335

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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