LM5071MTX-80/NOPB National Semiconductor, LM5071MTX-80/NOPB Datasheet
LM5071MTX-80/NOPB
Specifications of LM5071MTX-80/NOPB
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LM5071MTX-80/NOPB Summary of contents
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... IC. Features n Compatible with 12V ac adapters n Fully Compliant 802.3af Power Interface Port n 80V, 1Ω, 400 mA Internal MOSFET Block Diagram © 2006 National Semiconductor Corporation n Detection Resistor Disconnect Function n Programmable Classification Current n Programmable Under-voltage Lockout with Programmable Hysteresis n Thermal Shutdown Protection ...
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... Block Diagram (Continued) Connection Diagram Ordering Information Order Number Description LM5071MT-50 50% Duty Cycle Limit LM5071MTX-50 50% Duty Cycle Limit LM5071MT-80 80% Duty Cycle Limit LM5071MTX-80 80% Duty Cycle Limit www.national.com FIGURE 1. Simplified Block Diagram 20168403 16 Lead TSSOP NSC Package Type / Drawing TSSOP-16/MTC-16 TSSOP-16/MTC-16 TSSOP-16/MTC-16 TSSOP-16/MTC-16 ...
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Pin Descriptions Pin Name Description 1 VIN System high potential input. 2 RSIG Signature resistor pin. 3 RCLASS Classification resistor pin. 4 AUX Auxiliary input power startup pin. 5 UVLO Line under-voltage lockout. 6 UVLORTN Return for the external UVLO ...
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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. V ,RTN RSIG AUX UVLO RCLASS ARTN to RTN V , OUT to ARTN CC All other inputs to ARTN Electrical Characteristics Specifications in standard type face are for T perature range ...
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Electrical Characteristics Specifications in standard type face are for T perature range. Unless otherwise specified: V Symbol Parameter V Supply CC V UVLO (Rising UVLO (Falling) CC Supply Current (Icc) Error Amplifier GBW Gain Bandwidth DC Gain Input ...
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... Note 2: For detailed information on soldering the plastic TSSOP package, refer to the Packaging Databook available from National Semiconductor. Note 3: Min and Max limits are 100% production tested at 25 ˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate National’ ...
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Typical Performance Characteristics Default Current Limit vs Temperature UVLO Hysteresis Current vs Temperature Error Amp Input Voltage vs temperature Oscillator Frequency vs RT Resistance 20168409 Softstart Current vs Temperature 20168408 Oscillator Frequency vs Temperature 20168417 7 20168413 20168415 RT = ...
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Typical Performance Characteristics UVLO Threshold vs Temperature www.national.com (Continued) Input Current vs Input Voltage 20168412 20168406 8 20168407 ...
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Specialized Block Diagrams FIGURE 2. Top Level Block Diagram FIGURE 3. PWM Controller Block Diagram 9 20168404 20168405 www.national.com ...
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Detailed Operating Description The LM5071 power interface port and pulse width modula- tion (PWM) controller provides a complete integrated solu- tion for Powered Devices (PD) that connect into Power over Ethernet (PoE) systems. Major features of the PD interface portion ...
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Classification (Continued) TABLE 2. Classification Levels and Required External Resistors Class PMIN PMAX ICLASS (MIN) 0 0.44W 12.95W 0mA 1 0.44W 3.84W 9mA 2 3.84W 6.49W 17mA 3 6.49W 12.95W 26mA 4 Reserved Reserved 36mA Undervoltage Lockout (UVLO) The IEEE ...
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Power Supply Operation Once the UVLO threshold has been satisfied, the interface controller of the LM5071 will charge up the SMPS input capacitor through the internal power MOSFET. This load capacitance provides input filtering for the power converter section and ...
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Error Amplifier An internal high gain error amplifier is provided within the LM5071. The amplifier’s non-inverting reference is set to a fixed reference voltage of 1.25V. The inverting input is con- nected to the FB pin. In non-isolated applications, the ...
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Gate Driver and Maximum Duty Cycle Limit (Continued) plished with an internal toggle flip-flop which ensures an accurate duty cycle limit. The internal oscillator frequency of the LM5071-50 is therefore twice the operating frequency of the PWM controller (OUT pin). ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...