LM5070MTCX-50 National Semiconductor, LM5070MTCX-50 Datasheet
LM5070MTCX-50
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LM5070MTCX-50 Summary of contents
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... Features n Fully Compliant 802.3af Power Interface Port n 80V, 1Ω, 400 mA Internal MOSFET n Programmable Inrush Current Limit n Detection Resistor Disconnect Function © 2004 National Semiconductor Corporation n Programmable Classification Current n Programmable Under-voltage Lockout with Programmable Hysteresis n Thermal Shutdown Protection n Current Mode Pulse Width Modulator ...
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... Connection Diagram Ordering Information Order Number Description LM5070MTC-50 50% Duty Cycle Limit LM5070MTCX-50 50% Duty Cycle Limit LM5070SD-50 50% Duty Cycle Limit LM5070SDX-50 50% Duty Cycle Limit LM5070MTC-80 80% Duty Cycle Limit LM5070MTCX-80 80% Duty Cycle Limit LM5070SD-80 80% Duty Cycle Limit LM5070SDX-80 80% Duty Cycle Limit www.national.com FIGURE 1. Simplified Block Diagram ...
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Pin Description PIN NAME DESCRIPTION 1 V System high potential input RSIG Signature resistor pin. 3 RCLASS Classification resistor pin. 4 UVLO Line under-voltage lockout. 5 UVLORTN Return for the external UVLO resistors, if used. 6 RCLP Current ...
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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 UVLO UVLORTN RCLASS, RCLP ARTN to RTN V , OUT to ARTN CC All other inputs to ARTN ESD Rating ...
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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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... For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: For detailed information on soldering plastic TSSOP and LLP 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 Oscillator Frequency vs RT Resistance Softstart Current vs Temperature Inrush Current Limit vs RCLP Resistor 20120009 UVLO Hysteresis Current vs Temperature 20120013 Error Amp Input Voltage vs temperature 20120015 7 20120010 20120008 ...
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Typical Performance Characteristics Oscillator Frequency vs Temperature RT = 15.2 kΩ Input Current vs Input Voltage www.national.com (Continued) 20120014 UVLO Threshold vs Temperature 20120007 20120012 20120006 ...
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FIGURE 2. Top Level Block Diagram 9 20120004 www.national.com ...
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Detailed Operating Description The LM5070 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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TABLE 1. Operating Modes With Respect to Input Voltage Input Voltage Mode of V wrt V Operation IN EE 1.8V to 10.0V Detection (Signature) 12.5V to 20.5V Classification 23.0V to UVLO Awaiting Full Rising Vth Power 75V to UVLO Normal ...
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Power Supply Operation / Current Limit Programming (Continued) capacitance provides input filtering for the power converter section and must be at least 5uF per the IEEE 802.3af specification. To accomplish the charging in a controlled manner, the power MOSFET is ...
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Oscillator, Shutdown and Sync Capability (Continued) LM5070-50: The LM5070 can also be synchronized to an external clock. The external clock must have a higher frequency than the free running oscillator frequency set by the RT resistor. The clock signal should ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Package Number MTC16 Package Number SDA16A 16 ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials 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’ ...