MP8001 15W Power Over Ethernet PoE Powered Device (PD) Controller The Future of Analog IC Technology DESCRIPTION FEATURES The MP8001 is an IEEE 802. 3 af POE compliant Powered Device (PD) controller. It includes detection and classification modes as well as a 100V output pass device having a temperature compensated current limit over the specified temperature range. Thermal protection is built in to accommodate both transient and/or overload conditions, shutting the part down and protecting the input source as well as the output load depending on the particular fault conditions. Inrush current limiting is included to slowly charge the input capacitor without interruption due to die heating, a problem encountered without the current limit foldback feature. EVALUATION BOARD REFERENCE Board Number Dimensions EV8001DS-00A 2.8”x1.7”x0.8” ( LxWxH) Meets IEEE 802. 3 af Specifications 100V, 1Ω Integrate DMOS Device 460mA max, Current Limit Open Drain Power Good Output 8 pin SOIC and TSSOP Packages APPLICATIONS VoIP Telephones Network Cards Security Camera Systems Safety Backup Power Remote Internet Power All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. ADAM (Analog Digital Adaptive Modulation) and AAM (Advanced Asynchronous Mode) are trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP8001 Rev. 1.0 12/12/2011 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 1 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER ORDERING INFORMATION Part Number* MP8001DS Package SOIC8 Top Marking Free Air Temperature (TA) -40C to +85C * For Tape & Reel, add suffix –Z (e.g. MP8001DS–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP8001DS–LF–Z) PACKAGE REFERENCE TOP VIEW ILIM 1 8 VDD CLASS 2 7 NC DET 3 6 PG VSS 4 5 RTN MP8001_PD01 ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VDD, RTN ……………………….. -0.3V to +100V PG, DET .......................................-0.3V to +57V ILIM .................................................-0.3V to +7V CLASS .........................................-0.3V to +12V (2) Continuous Power Dissipation(TA = +25°C) ………………………………………………...1.19W Junction Temperature ...............................150C Lead Temperature ....................................260C Storage Temperature............... -65°C to +150C SOIC8 ....................................105 ..... 50 ... C/W Recommended Operating Conditions (3) Supply Voltage VIN ..............................0V to 57V Output Current IOUT .............................. 0 to 0.4A Operating Temperature.............. -40C to +85C Junction Temperature .............. -40C to +125C MP8001 Rev. 1.0 12/12/2011 (4) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 2 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER ELECTRICAL CHARACTERISTICS VDD = 48V, all voltages with respect to VSS, VSS = 0V; RDET = 26.1kΩ, RCLASS = 4.42KΩ, RILIM = 178kΩ, TA = 25C, unless otherwise noted. Parameter Detection Symbol Condition Min Typ Max Units Detection on VDET_ON VDD=VRTN=VPG=1.9V 1.9 V Detection off VDET_OFF VDD=VRTN=VPG=11V 11 V V Detection on/off Hysteresis VDET_H Falling below 11V on Threshold 0.2 DET Leakage Current VDET_LK VDET=VVDD=57V, Measure IDET 0.1 5 μA Detection Current IDET VVDD=VRTN RDET=26.1kΩ, Measure IVDD+IRTN+IDET Classification VCLASS Output Voltage VCL Classification Current Classification Lower Threshold Classification Upper Threshold VDD= 3V 135 140 145 μA VDD= 10.1V 405 420 435 μA Over a Load Range of 1mA to 41.2 mA 9.6 10 10.3 V RCLASS=4420Ω, 13≤VVDD≤21V (guar by VCL) 2.2. 2.4 2.8 RCLASS=953Ω, 13≤VVDD≤21V (guar by VCL) RCLASS=549Ω, 13≤VVDD≤21V (guar by VCL) RCLASS=357Ω, 13≤VVDD≤21V (guar by VCL) RCLASS=255Ω, 13≤VVDD≤21V (guar by VCL) 10.3 17.7 27.1 38 10.6 18.3 28 39.4 11.3 19.5 29.5 41.2 VCL_ON Regulator Turns on, VVDD Rising 10.2 11.3 13 V VCU_OFF Regulator Turns off, VVDD Rising 21 21.9 23 V ICLASS VCU_H IC Supply Current during Classification Leakage Current Pass Device On Resistance Leakage Current Current Limit Inrush Limit PG Latchoff Voltage Threshold Rising Latchoff Voltage Threshold Falling PG Deglitch Output Low Voltage MP8001 Rev. 1.0 12/12/2011 300 ILEAKAGE Hysteresis VDD = 17.5V, CLASS Floating, RTN Tied to VSS VCLASS = 0 V, VVDD = 57V RDS(ON) ISW_LK ILIMIT IINRUSH IRTN=300mA VVDD=VRTN=57V VRTN=1V VRTN=2V, RILM=178kΩ VRTN Rising (5) IIN_CLASS 0.4 Delay Rising and Falling PDG IPG = 400 μA V 500 μA 1 μA 380 120 1.0 1 420 150 1.2 15 460 180 Ω μA mA mA 9.5 10 10.5 V VRTN Falling (5) 1.2 (5) mA 75 150 0.12 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. V 225 0.4 μs V 3 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER ELECTRICAL CHARACTERISTICS(continued) VDD = 48V, all voltages with respect to VSS, VSS = 0V; RDET = 26.1kΩ, RCLASS = 4.42KΩ, RILIM = 178kΩ, TA = 25C, unless otherwise noted. Parameter Leakage Current UVLO Symbol Condition VPG = 57 V, VRTN = 0 V Voltage at VVDD Thermal Shutdown Thermal Shut down Temperature Hysteresis Thermal Shut down Counter Thermal Counter Reset Voltage Bias Current Operating Current TRISE Min Typ 0.1 Max 1 Units μA VVDD Rising (including 1.4V Diode drop) VVDD Falling (including 1.4V Diode drop) 38 30.2 40 31.5 42 32.8 V Temperature Rising 135 THYS ºC 40 ºC 8 counts V TCOUNT Events Prior to Latch off (5) VCRST Must Drop below Classification Range (5) 10.8 IQ(VDD) VDD = 48V, Pins 5, 6 Floating Measure IVDD 240 450 μA Notes: 5) Guaranteed by Design. MP8001 Rev. 1.0 12/12/2011 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 4 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER PIN FUNCTIONS Pin # Name Description 1 2 3 4 5 6 7 8 ILIM CLASS DET VSS RTN PG NC VDD Startup ILIM Value Set (optional at this point). Classification Resistor. 26.1kΩ Detection Resistor. Negative Power Supply Terminal. Powered Device Negative Power Terminal. Power Good Indicator. No Connect. Possible post-package trim input. Positive Power Supply Terminal. OPERATION The MP8001 operates in the manner described here and in the IEEE 802.3af Powered Device (PD) Specifications. This device (along with the power sourcing element (PSE)) operates as a safety device to supply potentially lethal voltages only when the power sourcing element recognizes a unique, tightly specified resistance at the end of an unknown length of Ethernet cable. A 25kΩ resistance is presented as a load to the PSE in Detection Mode, when the PSE applies two “safe” voltages of less than 10.1V each while measuring the change in current drawn in order to determine the load resistance. If the PSE “sees” the correct load, then it may either further increase the applied voltage to enter the “classification” range of operation or switch on the nominal 48V power to the load. The classification mode can further specify to the PSE the expected load range of the device under power so that the PSE can intelligently distribute power to as many loads as possible (within its maximum current capabilities). If a classification resistance is not present, the PD load is assumed to be the maximum of approximately 13 Watts. The classification mode is active between 14.5V and 20.5V. MP8001 Rev. 1.0 12/12/2011 The main power switch will pass a limited current above 31V, charging the external DC-to-DC converter’s input capacitor in a controlled manner. The charging will continue until the controlled current drops below the either an externally programmed limiting level or 450mA, depending upon the Rlim current setting resistor. The main power switch is internally thermally protected to 100V by reducing the output current using a foldback technique. The required power dissipation of the IC drops from the allowed peak value of 26W (450mA x 57V) to 0.16W ((450mA)2 x RON) during the normal operation at turn-on. The minimum allowed capacitance of 5µF will charge in 500µs. A larger capacitor will take a proportionally longer time to charge due to the constant current charging method. If a. A capacitor that is too large will overheat the part and force it into thermal shutdown. The IC will reattempt charging for a number of cycles but ultimately will be shut down until the input voltage from the PSE is recycled. This is the way the IC protects itself under overload and/or shorted conditions. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 5 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER BLOCK DIAGRAM VDD VIN DETECTION 2.7V - 10.1V CLASSIFICATION 14.5V - 20.5V Enable Chip PG DET HV CONTROL LOGIC AND GATE DRIVE ILIM VSTARTUP Startup Resistor RTN HV CLASS Optional Classification Resistor RSENSE MP8001_F01_BD02 VSS Figure 1—PD Block Diagram MP8001 Rev. 1.0 12/12/2011 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 6 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER PACKAGE INFORMATION SOIC8 MP8001 Rev. 1.0 12/12/2011 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 7 MP8001 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER TSSOP8 PACKAGE OUTLINE DRAWING FOR 8-TSSOP MF-PO-D-0038 revision 0.0 8 2.90 3.10 5 1.60 TYP 4.30 4.50 PIN 1 ID 1 0.65 BSC 0.40 TYP 5.80 TYP 6.20 6.60 4 TOP VIEW RECOMMENDED LAND PATTERN 0.80 1.05 1.20 MAX SEATING PLANE 0.19 0.30 0.65 BSC 0.09 0.20 0.05 0.15 SEE DETAIL "A" FRONT VIEW SIDE VIEW NOTE: GAUGE PLANE 0.25 BSC 0o-8o 0.45 0.75 DETAIL 揂 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING CONFORMS TO JEDEC MO-153, VARIATION AA. 6) DRAWING IS NOT TO SCALE. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP8001 Rev. 1.0 12/12/2011 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 8