Datasheet
Package Availability, Models, Samples & Pricing
General 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
.
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.
For more information on Reliability Metrics, please click here.
Design Tools
| Title | Size in Kbytes |
Date |
 |
|
|
| Application DC/DC Converter Featuring the Cascaded Power Converter Topology |
349 Kbytes |
22-Mar-2007 |
View Online |
Download |
|
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1299: Application Note 1299 LM5041 Evaluation Board |
287
Kbytes |
16-Mar-04 |
Download |
[Information as of 8-Nov-2009]
|
RoHS Compliance Information
