Features • Internal Start-up Bias Regulator • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis • Current Mode Control • Internal Error Amplifier with Reference • Cycle-by-cycle Over-Current Protection • Leading Edge Blanking • Programmable Push-Pull Overlap or Dead Time • Internal 1.5A Push-Pull Gate Drivers • Programmable Soft-start • Programmable Oscillator with Sync Capability • Precision Reference • Thermal Shutdown Description The LM5041A PWM controller contains all of the features necessary to implement either current-fed or voltage-fed push-pull or bridge power converters. These "Cascaded" topologies are well suited for multiple output and higher power applications. The LM5041A's four control outputs include: the buck stage controls (HD and LD) and the push-pull control outputs (PUSH and PULL). Push-pull outputs are driven at 50% nominal duty cycle at one half of the switching frequency of the buck stage and can be configured for either a guaranteed overlap time (for current-fed applications) or a guaranteed both-off time (for voltage-fed applications). Push-pull stage MOSFETs can be driven directly from the internal gate drivers while the buck stage requires an external driver such as the LM5102. The LM5041A includes a high-voltage start-up regulator that operates over a wide input range of 15V to 100V. The PWM controller is designed for high-speed capability including an oscillator frequency range up to 1 MHz and total propagation delays of less than 100ns. Additional features include: line Under-Voltage Lockout (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown. The two differences between the LM5041 and the LM5041A are: No second level current limit in the 'A' version No softstart (SS) shutdown comparator in the 'A' version . Applications • Telecommunication Power Converters • Industrial Power Converters • Multi-Output Power Converters • +42V Automotive Systems

Also Recommended LM5102 100V High-Side / Low-Side Dual Mosfet Driver LM3411 Feedback Control / Optocoupler Driver For Isolated Supplies MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

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

Datasheet

Title		Size	Date	Other Language
	LM5041A Cascaded PWM Controller	721 Kbytes	26-May-05

Featured Application Notes

Title		Size	Date	Other Language
	AN-1299: Application Note 1299 LM5041 Evaluation Board	287 Kbytes	16-Mar-04

More Application Notes

Title		Size	Date	Other Language
	AN-1299: Application Note 1299 LM5041 Evaluation Board	287 Kbytes	16-Mar-04

Design Tools

Title	Size	Date
Application DC/DC Converter Featuring the Cascaded Power Converter Topology	349 Kbytes	22-Mar-2007

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5041AMTC	ABCD150	0	34175	0	0	4234000	1	1201409060
LM5041AMTCX	ABCD150	0	34175	0	0	4234000	1	1201409060
LM5041ASD	ABCD150	0	34175	0	0	4234000	1	1201409060
LM5041ASDX	ABCD150	0	34175	0	0	4234000	1	1201409060

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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