LM5041BMTC NSC [National Semiconductor], LM5041BMTC Datasheet
LM5041BMTC
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LM5041BMTC Summary of contents
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Cascaded PWM Controller General Description The LM5041B 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 ...
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... Connection Diagram Ordering Information Order Number LM5041BMTC LM5041BMTCX LM5041BSD LM5041BSDX Pin Descriptions Pin Pin Pin # Name Description V 1 Source Input Voltage Feedback Signal Output of the Internal 3 COMP Error Amplifier Precision 5 volt 4 REF reference output Main Buck PWM 5 HD control output ...
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Pin Pin Pin # Name Description 12 CS Current sense input 13 SS Soft-Start control Push-Pull overlap and 14 TIME dead time control Oscillator timing SYNC resistor pin and sync Line Under-Voltage 16 UVLO Shutdown LLP DAP ...
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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 GND CC All Other Inputs to GND Junction Temperature Storage Temperature Range Electrical ...
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Symbol Parameter Oscillator Frequency1 Frequency2 Sync threshold PWM Comparator Delay to Output Max Duty Cycle Min Duty Cycle COMP to PWM Comparator Gain COMP Open Circuit Voltage COMP Short Circuit Current Slope Compensation Slope Comp Amplitude UVLO Shutdown Under-Voltage Shutdown ...
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Typical Performance Characteristics V and Pin Current vs Temp Overlap Time vs R www.national.com 30086408 30086415 SET 30086411 30086409 Frequency vs RT 30086410 Dead Time vs R ...
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Overlap Time vs Temp 30086413 Error Amplifier Gain Phase 30086416 Dead Time vs Temp 7 30086414 www.national.com ...
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Block Diagram www.national.com Simplified Block Diagram 8 30086403 ...
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Detailed Operating Description The LM5041B 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 LM5041B includes ...
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PWM Comparator The PWM comparator compares the slope compensated cur- rent 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 cycles. The ...
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Slope Compensation The PWM comparator compares the current sense signal to the voltage at the COMP pin. The output stage of the internal error amplifier generally drives the COMP pin. At duty cycles greater than 50%, current mode control circuits ...
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Typical Application www.national.com FIGURE 1. Simplified Cascaded Half-Bridge 12 30086406 ...
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Application Circuit: Input 35V to 80V, Output 2.5V, 50A 13 www.national.com ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Molded TSSOP-16 NS Package Number MTC16 16-Lead LLP Surface Mount Package NS Package Number SDA16A 14 ...
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Notes 15 www.national.com ...
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