lm5041sdx National Semiconductor Corporation, lm5041sdx Datasheet
lm5041sdx
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lm5041sdx Summary of contents
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... Additional features include: line Under-Voltage Lock- out (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown. Typical Application Circuit Simplified Cascaded Push-Pull Power Converter © 2004 National Semiconductor Corporation Features n Internal Start-up Bias Regulator n Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis ...
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... Connection Diagram Ordering Information Order Number Package Type LM5041MTC TSSOP-16 LM5041MTCX TSSOP-16 LM5041SD LLP-16 LM5041SDX LLP-16 Pin Description PIN NAME 1 V Source Input Voltage Feedback Signal 3 COMP Output of the Internal Error Amplifier 4 REF Precision 5 volt reference output 5 HD Main Buck PWM control output ...
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Pin Description (Continued) PIN NAME 9 PULL Output of the push-pull drivers 10 PGND Power ground 11 AGND Analog ground 12 CS Current sense input 13 SS Soft-start control 14 TIME Push-Pull overlap and dead time control ...
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Block Diagram www.national.com Simplified Block Diagram 4 20074903 ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND 100V GND 16V CC All Other Inputs to GND -0 Junction ...
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Electrical Characteristics Specifications with standard typeface are for T Temperature range 48V Symbol Parameter Soft-Start Soft-start Current Source Soft-start to COMP Offset Shutdown Threshold Oscillator Frequency1 (RT = 26.7KΩ) Frequency2 (RT = 7.87KΩ) Sync threshold ...
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Electrical Characteristics Specifications with standard typeface are for T Temperature range 48V Symbol Parameter Output High Saturation Output Low Saturation Rise Time Fall Time Thermal Shutdown T Thermal Shutdown SD Temp. Thermal Shutdown Hysteresis Thermal ...
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Typical Performance Characteristics V and Pin Current vs Temp Overlap Time vs R www.national.com IN 20074908 20074915 SET 20074911 20074909 Frequency vs RT 20074910 Dead Time vs R ...
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Typical Performance Characteristics Overlap Time vs Temp Error Amplifier Gain Phase (Continued) Dead Time vs Temp 20074913 20074916 9 20074914 www.national.com ...
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Detailed Operating Description The LM5041 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 LM5041’s four ...
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Push-Pull Outputs (Continued) PWM Comparator The PWM comparator compares the slope compensated current ramp signal to the loop error voltage from the internal error amplifier (COMP pin). This comparator is optimized for speed in order to achieve minimum controllable duty ...
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Oscillator and Sync Capability (Continued) The buck stage will switch at the oscillator frequency and each push-pull output will switch at half the oscillator fre- quency in a push-pull configuration. The LM5041 can also be synchronized to an external clock. ...
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Typical Application FIGURE 1. Simplified Cascaded Half-Bridge 13 20074906 www.national.com ...
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Physical Dimensions inches (millimeters) unless otherwise noted Molded TSSOP-16 NS Package Number MTC16 16-Lead LLP Surface Mount Package NS Package Number SDA16A 15 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...