LM5072 Evaluation Board National Semiconductor Application Note 1
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LM5072 Evaluation Board
LM5072 Evaluation Board
National Semiconductor Application Note 1455 Youhao March 2006
LM5072 evaluation board designed provide cost, fully IEEE 802.3af compliant Power over Ethernet (PoE) power supply, capable operating with both auxiliary (AUX) power sources. evaluation board features LM5072 Powered Device (PD) interface controller integrated circuit (IC) configured versatile flyback topology.
Note about Input Potentials
LM5072 designed applications that typically -48V systems, which notations -48V normally refer high input potentials, respectively. However, easy readability, LM5072 datasheet written positive voltage convention with positive input potentials referenced LM5072. Therefore, when testing evaluation board with bench power supply, negative terminal power supply equivalent system's -48V potential, positive terminal equivalent system ground. prevent confusion between datasheet this application note, same positive voltage convention used herein.
Features LM5072 Evaluation Board:
Single Isolated 3.3V output (see Figure Dual Isolated 3.3V outputs supported (see Figure Non-Isolated outputs supported (see Figure Maximum output current Input voltage range maximum output current configured): With installed wide-voltage-range EP13 transformer input voltage range: FAUX input voltage range: RAUX input voltage range: With optional, efficiency-optimized EP13 transformer input voltage range: FAUX input voltage range: RAUX input voltage range: Measured maximum efficiency: With installed wide-voltage-range EP13 transformer converter efficiency: Overall efficiency (including diode bridge): 78.5% With optional, efficiency-optimized EP13 transformer converter efficiency: Overall efficiency (including diode bridge): 81.5% Board Size: 2.75 2.00 0.66 inches Operating frequency: input under-voltage lockout (UVLO) release: nominal input UVLO hysteresis: nominal This application note focuses evaluation board. Please refer datasheet detailed information about complete functions features LM5072
Note About Maximum Power Capability
While LM5072 provides fully IEEE 802.3af compliant solution, also capable supporting higher power level applications with input current However, this evaluation board designed IEEE 802.3af compliant power levels less than 12.95W. This power limitation mainly appropriately rated devices like power transformer power switch MOSFET, which support higher power levels. should noted that when using LM5072 elevated power levels, thermal environment must carefully considered. power conversion 100% efficient. should noted that conversion efficiency lowers amount power that delivered load levels significantly below 12.95W. example, efficiency limits power delivered 9.7W. Conversion efficiency must also taken into account when calculating board input current. Finally, when configured front auxiliary operation, maximum power deliverable limited swap MOSFET's current limit function. This especially true lower input voltages. current limit adjusted single resistor DCCL pin.
Schematic Evaluation Board
Figure shows schematic LM5072 evaluation board. Appendix Bill Materials (BOM).
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2006 National Semiconductor Corporation
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(Continued)
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Schematic Evaluation Board
FIGURE Schematic LM5072 Evaluation Board
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Connection Proper Test Methods
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FIGURE LM5072 Evaluation Board Connections Figure shows connections LM5072 evaluation board. LM5072 evaluation board following four ports connections. RJ45 connector input PJ102A power jack, Front Auxiliary (FAUX) input (also accessible with posts located immediately behind jack) other PJ102A power jack, Rear Auxiliary (RAUX) input (also accessible with posts immediately behind jack) 3.3V output port accessible with posts input, diode bridges (BR1 BR2) steer current positive negative supply pins LM5072. both FAUX RAUX inputs, higher potential input voltages should feed into center pins PJ102A jacks, respectively. should pointed that returns FAUX RAUX inputs, should interchanged because they represent same potential circuit. RAUX reverse protected, additional reverse blocking diode will required complete RAUX input reverse protection. output connection, load either passive resistor active electronic load. Attention should paid output polarity when connecting electronic load. additional filter capacitors greater than total across output port recommended unless feedback loop compensation adjusted accordingly. Sufficiently large wire such thicker required when connecting source supply load. Also, monitor current into circuit board. Monitor voltages directly board terminals, resistive voltage drops along connecting wires decrease measurement accuracy. Never rely bench supply's voltmeter ammeter accurate efficiency measurements desired. When measuring dc-dc converter efficiency, converter input voltage should measured across this input converter stage. When measuring evaluation board overall efficiency (which more relevant), both input output voltages should read from terminals evaluation board.
Source Power
fully test LM5072 evaluation board, power supply capable least required input. auxiliary source power, either FAUX RAUX, power supply capable output over-voltage over-current limit features bench power supplies protect board against damage errant connections.
Loading Current Limiting Behavior
resistive load optimal, appropriate electronic load specified operation down 2.0V acceptable. maximum load current 3.3A. Exceeding this current input voltage cause oscillatory behavior part will into current limit mode. Current limit mode triggered whenever average current through connector exceeds (default nominal). current limit programmed desired level selecting resistor value (see LM5072 datasheet further details). current limit triggered, switching regulator automatically disabled discharging softstart capacitor through pin. module then allowed restart, unit will operate automatic re-try (hiccup) mode long over-current condition remains. Switching regulator shut down during fault condition such current limit delayed adding additional filtering capacitance nPGOOD pin.
Power
suggested apply power first. During first power load should kept reasonably low. Check supply current during signature classification modes before applying full power. During signature mode, module should have characteristics resistor series with diodes. During classification mode, current draw should about 700µA 16V; RCLASS left open, defaulting class proper response observed during both signature classification modes, check connections closely. current flowing likely that conductors feeding power have been incorrectly installed. Once proper setup been established, full power applied. voltmeter across output terminals
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Power
(Continued)
power. Refer LM5072 datasheet IEEE 802.3af detailed information about these operating modes.
(+3.3V) (3.3V RTN), will allow direct measurement 3.3V output line. 3.3V output voltage observed within seconds, turn power supply review connections. final check efficiency best confirm that unit operating properly. Efficiency significantly lower than full load indicates problem. After proper operation verified, user apply auxiliary power FAUX RAUX inputs. recommended that application auxiliary power follow same precautions those taken when applying PoE. output voltage observed, likely that auxiliary power feed polarity reversed. After successful operation observed both FAUX RAUX modes, full power testing begin.
Signature Detection
signature resistor integrated into LM5072 signature capacitor implemented with capacitor C29, depending auxiliary input configuration. should noted that when either FAUX RAUX power applied first, will allow Power Sourcing Equipment (PSE) identify valid device because auxiliary voltage will cause current steering diode bridges reverse biased during detection mode. This prevents from applying power, evaluation board will only draw current from auxiliary source.
Classification
classification implemented with R22. evaluation board default Class leaving RCLASS open (R22 position populated). activate specific class instead Class install according following table. ICLASS(MIN) 17mA 26mA 36mA ICLASS(MAX) 12mA 20mA 30mA 44mA Selection Open 71.5 46.4 31.6
Interface Operating Modes
When connecting into system, evaluation board's Powered Device interface will through following operating modes sequence: signature detection, power level classification (optional), application full Class PMIN 0.44W 0.44W 3.84W 6.49W Reserved PMAX 12.95W 3.84W 6.49W 12.95W Reserved
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Input UVLO UVLO Hysteresis
input Under Voltage Lock-Out (UVLO) integrated function LM5072. UVLO release threshold approximately 38.5V pins UVLO hysteresis approximately
difficult achieve without additional circuitry. Contact National Semiconductor schematic robust dominant solution. Because LM5072's input swap feature applicable RAUX input, resistors parallel used achieve transient protection. Unlimited inrush currents wear board traces, connector contacts, various board components, well create dangerous transient voltages. Nevertheless, these resistors will cause power loss RAUX power mode, they also reduce effective RAUX input voltage level sensed LM5072. resistors should made large practical application. But, with RAUX input voltage 16V), need reduced lower value. During RAUX operation, swap MOSFET turned off. Consequently, substrate longer impedance path power return. advised that user remove populate C29. capacitor across swap MOSFET will both signature capacitor high frequency short substrate noise. RAUX power option used design, delete R13, from circuit lower cost.
Inrush Current Limit Programming
LM5072 allows user independently program inrush current limits internal Swap MOSFET. evaluation board sets inrush limit default leaving unpopulated, current limit default leaving DCCL open (R23 populated). applications where desirable adjust these values, install R23, respectively, according recommendations LM5072 datasheet. Please note that leaving DCCL open, default current limit will elevated during FAUX operation. When used program current limit, applies both FAUX power modes, should considered "firm limit", i.e. independent operating mode.
FAUX Power Option
FAUX power option, ICL_FAUX LM5072 senses FAUX input voltage through When current flowing into ICL_FAUX greater than 8.5V nominal, will establish state ICL_FAUX that forces UVLO release order allow operation auxiliary input voltage (17V seen LM5072 IC). should ICL_FAUX stable, accurate UVLO threshold, front auxiliary supply should pull well past voltage current thresholds. should pointed that minimum operative FAUX input voltage maximum output current 24V. This mainly limited default FAUX input current limit LM5072's internal swap MOSFET. lowering FAUX input voltage, input current will exceed said limit unless output current reduced accordingly. FAUX power option used design, delete from circuit reduce cost.
Auxiliary Dominant RAUX Power Option
evaluation board populated auxiliary dominance RAUX power option. This achieved selecting 4.99 R13. applications where auxiliary dominance desirable, change installed higher value. Please refer LM5072 datasheet assistance selecting this value.
Auxiliary Input "OR-ing" Diode Selection
Special attention should paid selection They need high speed diodes because there switching action during operation associated with these components, they should reverse leakage current devices. Otherwise, leakage current during operation create false signal ICL_FAUX pin, RAUX pin, both, circuit powered from FAUX RAUX source. Leakage current into ICL_FAUX also corrupt inrush current programming, implemented. Most diode transistor datasheets provide information maximum leakage current both 25°C 125°C, although data intermediate temperatures often supplied. approximated that leakage current doubles every 10°C rise temperature. junction temperature these devices should reach 125°C because only dissipation inside these devices caused leakage current. Therefore, necessary select devices based maximum leakage current specified 125°C. evaluation board design considered 55°C maximum junction temperature these devices, which acceptable most applications. Simple circuit adjustments made higher leakage currents expected. Resistors (note that resistor installed loacation evaluation board achieve function similar R29's) both 24.9 providing paths leakage currents respectively. These resistors meant sink leakage current from
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RAUX Power Option
rear auxiliary power option, RAUX LM5072 senses RAUX input voltage through R13. When current flowing into RAUX greater than 2.5V nominal, will establish state RAUX that forces switching regulator controller operation input voltages seen pins LM5072 IC). When current flowing into RAUX greater than nominal, which preset configuration evaluation board, auxiliary dominance selected. During auxiliary dominance, RAUX power source will always supply current regardless power present not. This accomplished forcing shut down swap MOSFET. implemented Maintain Power Signature, will remove supply thus freeing power allocated other ports. only Maintain Power Signature implemented, remove power. Note that auxiliary non-dominance does imply dominance. dominance very
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Auxiliary Input "OR-ing" Diode Selection (Continued)
diodes prevent false states ICL_FAUX RAUX pins. Please LM5072 datasheet more details about selection these resistors.
FAUX input OR-ing diode reduces potential 17V. This because lower FAUX input voltages maximum power that delivered load will greatly reduced swap MOSFET's current limit function. This drawbacks FAUX operation, though current limit adjusted adding changing value DCCL resistor. minimum RAUX voltage evaluation board (voltage drops caused inrush limit resistors RAUX input OR-ing diode reduce potential about 15V), although LM5072 function with minimum seen VIN. RAUX operating voltage limit mainly determined three factors; value RAUX inrush current limit resistor flyback power transformer design, values current sense resistors R15, mainly dropout startup regulator. installed resistors. Under full load conditions, these resistors significantly reduce effective RAUX voltage seen DC-DC converter stage. order operate evaluation board lower input voltage, required reduce lower values. installed EP13 type power transformer (DA2257-AL DCT13EP-U12S005) cost, area efficient solution operate with wide auxiliary input voltage range. However, small cross-sectional area EP13 magnetic core also limits maximum flux support. such small transformer from input under full load condition, compromise between minimum operating input voltage maximum inductance transformer must made such that peak current input will cause peak flux density exceed 3000 Gauss (saturation). drawback this cost solution that current flowing through dc-dc converter stage increased efficiency dc-dc converter suffers about Replacing installed transformer with optional power transformer DA2383-AL from Coilcraft improves efficiency, minimum operating input voltage will limited 24V. this optional transformer lower input voltage, load level should scaled down accordingly, shown Figure
Flyback Converter Topology
dc-dc converter stage LM5072 evaluation board features flyback topology, which employs minimum number power components implement isolated power supply lowest possible cost. unique characteristic flyback topology power transformer. Unlike ordinary power transformer that simultaneously transfers power from primary secondary, flyback transformer first stores energy transformer core while main switch turned then releases stored energy load during rest cycle. When stored energy completely released before main switch turned again, said that flyback converter operates continuous conduction mode (CCM). Otherwise, discontinuous conduction mode (DCM). Major advantages over include lower ripple current ripple voltage, requiring smaller input output filter capacitors; (ii) lower current, thus reducing conduction losses. keep flyback converter light load, transformer's primary inductance should designed large practical. Major drawbacks CCM, compared DCM, presence right-half-plane zero, which limit achievable bandwidth feedback loop, (ii) need slope compensation stabilize feedback loop duty cycles greater than 50%. flyback topology have multiple secondary windings several isolated outputs. more these secondary channels normally utilized internally converter itself provide necessary bias voltages controller. evaluation board uses small power transformer having primary inductance This compromise made allow small transformer operate over wide input voltage range from 60V. However, with this transformer, flyback converter runs full load input voltages lower than 42V, higher input voltages light loads. LM5072's built-in slope compensation helps stabilize feedback loop when duty cycle exceeds during input voltage operation. transformer winding used provide bias voltage (VCC) LM5072 Although LM5072 controller includes internal startup regulator which support bias requirement indefinitely, transformer winding produces output about higher than startup regulator output, thus shutting startup regulator reducing power dissipation inside Given current limit value nominal) high voltage startup regulator, line meant linear regulator external loads.
Factors Limiting Minimum Operating Input Voltage
LM5072 supports operation with voltage auxiliary power sources. minimum FAUX voltage maximum output current. reduced output current reduced voltage drop caused
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FIGURE Maximum Load Current Minimum Input Voltage Limited Different EP13 Type Power Transformers
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Factors Limiting Minimum Operating Input Voltage (Continued)
optimize efficiency over maximum input voltage range 10.5V seen pin, after replaced with larger magnetic core like EFD20 should used. EFD20 core adequate crosssectional area handle peak currents observed with 10.5V input. effects current sense resistors also limit minimum RAUX input operating voltage. LM5072's internal slope compensation stabilizes feedback loop dc-dc converter when duty cycle exceeds input voltages lower than 22V. However, relative magnitude slope compensation inversely proportional values R15. maximum values governed following relation:
user. power sequence follows. Note that isolated from +3.3V output board: Before power nodes non-isolated section power supply remain high potential until UVLO released drain internal swap MOSFET pulled down regulator powers during inrush sequence. During regulator startup, draws current order 20mA, this will likely noticed user. Once drops below 1.5V (referenced VEE), gate swap MOSFET rises, power good asserted pulling nPGOOD low. Once power good been asserted, (SoftStart) released. will rise rate equal current source, typically 10µA, divided capacitance, C26. switching regulator achieves regulation, auxiliary winding will raise voltage about 11V, thus shutting down internal regulator increasing efficiency.
where Dmax duty cycle minimum AUXILIARY input voltage; switching frequency, flyback transformer primary inductance, transformer's primary secondary turns ratio output voltage, volts forward drop output diode volts Selecting 0.30 both will allow minimum operating voltage 16V. lower RAUX input voltages, Dmax greater hence must reduced accordingly. However, smaller resistors increase effect internal slope compensation. Increasing slope compensating makes feedback loop appear more like voltage mode than current mode. This turn requires capacitor C16, rather than cost capacitor initially installed evaluation board. summary, minimum operating RAUX input voltage evaluation board limited cost solution, also dropout startup regulator. order evaluation board with lower RAUX source, power transformer output capacitor C16, R14, should modified, addition installation should installed whenever voltage less than 15V. This ensures regulator enough voltage start given relatively high drop requirement. must also careful violate pin's absolute maximum voltage rating under this configuration. Accordingly, nominal auxiliary supply difficult design for, will require installation violate pin's absolute maximum rating. Additional circuitry required, selection different auxiliary input voltage.
Figure shows voltage (referenced VEE), output voltage VOUT input current during normal startup sequence. voltage gradually drops input current charges input capacitors. When charging process completed, voltage drops below 1.5V, followed soft start converter. Figure shows voltage during startup. about first produced internal startup regulator. When output regulation established, elevated about through cross-regulation.
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Horizontal Resolution: ms/Div. Trace VOUT, 2V/Div. Trace (referenced VEE), 20V/Div. Trace Input Current, mA/Div. FIGURE Normal input Startup Sequence
Performance Characteristics
INPUT POWER SEQUENCE high level integration designed into LM5072 allows power sequencing communications occur within Very little system management design required
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Performance Characteristics
(Continued)
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Horizontal Resolution: ms/Div.
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Horizontal Resolution: ms/Div. Trace VOUT, cross-regulating after output regulation established. 2V/Div. Trace VCC, first regulated startup regulator 7.6V, then elevated auxiliary winding 11V. 2V/Div. Trace Input Current, 0.5A/Div. FIGURE During Startup AUXILIARY INPUT POWER SEQUENCE FAUX input power sequence similar that input, with exception that UVLO release threshold overridden when ICL_FAUX pulled RAUX input power sequence simpler: Auxiliary application quickly charges input capacitors. There should overshoot observed series resistors should limit inrush. When regulator establishes 7.6V, soft start controller begins. switching regulator achieves regulation, auxiliary winding will raise voltage about 10V, thus shutting down internal regulator increasing efficiency. Figures shows FAUX RAUX input power sequence, respectively.
Trace VOUT, 2V/Div. Trace VCC, 5V/Div. Trace Input Current, 0.5A/Div. FIGURE Normal FAUX input Startup Sequence
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Horizontal Resolution: ms/Div. Trace VOUT, 2V/Div. Trace VCC, 5V/Div. Trace Input Current, 0.5A/Div. FIGURE Normal RAUX input Startup Sequence Figure shows normal 3.3V output voltage startup, along with reference.
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Performance Characteristics
(Continued)
threshold 0.5V). Therefore duty cycle short, leading limited input current (the average current current pulses) about 0.34A.
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Horizontal Resolution: ms/Div. Trace VOUT, 1V/Div. Trace voltage (referenced RTN), 1V/Div Trace Input current coupled), mA/Div FIGURE Output Voltage Vout (+3.3V) Soft-start Detail OUTPUT DEAD SHORT FAULT RESPONSE evaluation board survives output dead short condition running into re-try mode (hiccup). Applying dead short +3.3V line causes number protection mechanisms occur sequentially. They are: feedback signal increases duty cycle attempt maintain output voltage. This initiates cycle-by-cycle over-current limiting which turns main switch when current sense (CS) exceeds current limit threshold. current internal swap MOSFET rises until current limited around Some overshoot current will observed, takes time current limit amplifier react change operating mode MOSFET. Because linear current limit accomplished driving MOSET into saturation region, drain voltage (RTN pin) rises. When reaches 2.5V with respect VEE, power good de-asserted nPGOOD rises voltage. de-assertion power good causes discharge softstart capacitor, which disables switching action dc-dc converter. Once switching stops, current internal MOSFET will decrease drain voltage will fall back below 1.5V with respect VEE. When power good re-asserted, dc-dc converter will automatically restart with softstart sequence. Figure shows cycle-by-cycle peak current limit providing over-current protection under output short-circuit condition. short-circuit condition causes large over current such that intends saturate power transformer. Consequently, large peak current about 4.33A produced primary circuit. This large peak current causes current-sense voltage exceed peak limit
Horizontal Resolution: µs/Div. Trace Voltage pin, mV/Div. Trace Input Current, 0.5A/Div. Vin=48V. Iin=0.34A FIGURE Cycle-by-Cycle Peak Current Limit Protection Under Output Short-Circuit Condition Figure shows over-current protection swap MOSFET's current limit under output short circuit condition. circuit operates FAUX power configuration, FAUX input voltage 24V. input current will exceed current limit swap MOSFET, causes voltage rise rapidly. also discharges soft start capacitor connected pin, circuit enters automatic retry mode until over-current condition removed. voltage observed rise quickly LM5072 reacts fault. This because internal soft-start circuitry referenced RTN, while scope measurements referenced VEE.
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Horizontal Resolution: ms/Div. Trace voltage (referenced VEE), 2V/Div. Trace Softstart (referenced VEE), 5V/Div. Trace Input current, 0.5A/Div. FAUX input=24V FIGURE Shorted Output Fault Condition Automatic Re-try
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Performance Characteristics
(Continued) STEP RESPONSE Figure shows step load response 48V.
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Horizontal Resolution: µs/Div. Trace Drain source voltge main switch 50V/Div. Vin=48V, Iout=3.3A
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FIGURE Flyback Transformer Waveforms
Horizontal Resolution: ms/Div. Trace Output voltage coupled), mV/Div. Trace Output current coupled), A/Div. FIGURE Regulator Response Step Load RIPPLE VOLTAGE/CURRENT Figure shows output ripple voltage input ripple current input voltage 3.3A output. input ripple current reduced less than pk-pk input filter inductor.
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Horizontal Resolution: µs/Div. Trace Reverse voltage across output rectifier diode 5V/Div. Vin=48V, Iout=3.3A FIGURE Flyback Transformer Waveforms
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Reconfiguration Evaluation Board 3.3V Dual Outputs
standard evaluation circuit easily reconfigured into 3.3V 0.6A 5.5V dual output power supply. reconfigure board dual output, populate components 5.5V output rail shown Figure These components listed additional list Appendix.
Horizontal Resolution: ms/Div. Trace Output voltage coupled), mV/Div. Trace Input current coupled), mA/Div. Vin=48V, Iout=3.3A FIGURE Ripple Currents Voltages FLYBACK TRANSFORMER WAVEFORMS Figures show typical flyback transformer waveforms: drain source voltage main switch reverse voltage rectifier diode respectively, input voltage 3.3A output.
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Reconfiguration Evaluation Board Non-Isolated Output
applications where output isolation required, non-isolated version evaluation board used reduce cost. Reconfiguration circuit board non-isolated version accomplished following four steps: Delete unused parts from circuit board well BOM: C20, C22, C25, C28, R11, R16, R17, R24,
Connect test points with wire Short pads installing resistor R2010 size, soldering piece wire.
Change Figure shows schematic non-isolated circuit with single 3.3V output. Similar changes also apply dual output version.
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FIGURE Schematic Dual Outputs
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FIGURE Schematic Non-Isolated Output
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Note Using Efficiency Optimized EP13 Power Transformer DA2383
Please note that DA2383 single output transformer. When using DA2383 obtain better efficiency (See Figure applicable load input voltage levels), also
remember connect D5's cathode DA2383's with short jumper wire. This because secondary winding DA2382 uses Pins through transformer bobbin, unlike DA2257 that only uses Pins secondary winding. maximum converter stage efficiency 3.3A will expected greater than 84%.
Appendix: LM5072 Evaluation Board Bill Materials
ITEM LED1
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PART NUMBER CBRHD-01 CBRHD-01 CRCW08052492F C0805C681F5GAC C5750X7R2A475M EEV-HA2A220P C3216X5R0J106M C3216X5R0J106M C3216X5R0J106M C3216X5R0J106M C3216X5R0J106M EMVY6R3ADA331MF80G C2012X5R1C105K C2012X5R1C474K C0805C473K5RAC C0805C102K5RAC C0805C102K5RAC C0805C331K5RAC C0805C473K5RAC C3216X7R2A104K C4532X7R3D222K C0805C473K5RAC S3BB-13 CMR1U-01M CMHD4448 12CWQ03FN CMR1U-01M CMHD4448 RJ-45-8N-B PJ-102A PJ-102A 3104-2-00-01-00-00-080 3104-2-00-01-00-00-080 DO3308P-103MLD DO1813P-331HC SSL-LXA228GC-TR11 5012K-ND 5012K-ND 5012K-ND 5012K-ND
DESCRIPTION DIODE BRIDGE, SMDIP, CENTRAL DIODE BRIDGE, SMDIP, CENTRAL RESISTOR CAPACITOR, CER, CC0805, KEMET CAPACITOR, CER, CC2220, CAPACITOR, ELEC, PANASONIC CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1206, CAPACITOR, ELEC, CHEMI-ON CAPACITOR, CER, CC0805, CAPACITOR, CER, CC0805, CAPACITOR, CER, CC0805, KEMET CAPACITOR, CER, CC0805, KEMET CAPACITOR, CER, CC0805, KEMET CAPACITOR, CER, CC0805, KEMET CAPACITOR, CER, CC0805, KEMET CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1812, CAPACITOR, CER, CC0805, KEMET DIODE, SMB, DIODE DIODE, SMA, CENTRAL DIODE, SOD123, CENTRAL SCHOTTKY, TO252, DIODE, SMA, CENTRAL DIODE, SOD123, CENTRAL RJ-45 CONNECTOR POWER JACK POWER JACK POST, MILL POST, MILL INDUCTOR, COILCRAFT INDUCTOR, COILCRAFT LED,GREEN, LUMEX TEST POINT, KEYSTONE TEST POINT, KEYSTONE TEST POINT, KEYSTONE TEST POINT, KEYSTONE
VALUE 0.5A, 100V 0.5A, 100V 24.9K 680p, 4.7µF, 100V 22µF, 100V 10µF, 6.3V 10µF, 6.3V 10µF, 6.3V 10µF, 6.3V 10µF, 6.3V 330µF, 6.3V 1.0µF, 0.47µF, 47nF, 1nF, 1nF, 330pF, 47nF, 100nF, 100V 2.2nF, 47nF, 100V 100V 125mA, 12A, 100V 125mA,
10µH 0.33µH
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Appendix: LM5072 Evaluation Board Bill Materials
ITEM PART NUMBER SUD15N15-95 CRCW2512200J CRCW2512200J CRCW080520R0F CRCW120610R0F CRCW08053321F CRCW08051002F CRCW080510R0F CRCW08051000F CRCW08051002F CRCW08052432F CRCW08054991F CRCW12060R301F CRCW12060R301F CRCW08051001F CRCW08051001F CRCW08051472F CRCW08056340F CRCW08052102F CRCW08050R0J CRCW08050R0J CRCW08053320F CRCW08052492F DA2257-AL DCT13EP-U12S005 LM5072-80 PS2801-1-L PC3H7D LMV431A CMZ5944B SMAJ58A RESISTOR RESISTOR RESISTOR RESISTOR XFMR, FLYBACK, COILCRAFT XFMR, FLYBACK, RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR DESCRIPTION MOSFET, N-CH, TO252, VISHAY
(Continued) VALUE 150V, 3.3k 24.3k 4.9k 0.301 0.301 14.7k 21.0k
24.9k 32µH 32µH LM5072-80 PS2801 PC3H7D LMV431A CMZ5938B SMAJ58A
CTRL, NATIONAL OPTO-COUPLER, OPTO-COUPLER, SHARP REFERENCE, SOT23-3, NATIONAL Zener, 60V, CENTRAL TVS, 58V, DIODE
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LM5072 Evaluation Board
Additional 5.5V Output Rail
ITEM PART NUMBER C3216X5R1A106M C3216X5R1A106M C3216X5R1A106M EMVY100ADA101MF55G CMSH2-60 3104-2-00-01-00-00-080 3104-2-00-01-00-00-080 DO1813P-181MLD CMZ5920B DESCRIPTION CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1206, CAPACITOR, CER, CC1206, CAPACITOR, ELEC, CHEMI-ON DIODE, SMA, CENTRAL POST, MILL POST, MILL INDUCTOR, COILCRAFT ZENER, SMA, CENTRAL 0.18µH 6.2V VALUE 10µF, 10µF, 10µF, 100µF,
Note: total load dual outputs should limited below maximum.
National does assume responsibility circuitry described, circuit patent licenses implied National reserves right time without notice change said circuitry specifications. most current product information visit www.national.com. LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT GENERAL COUNSEL NATIONAL SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products uses packing materials that meet provisions Customer Products Stewardship Specification (CSP-9-111C2) Banned Substances Materials Interest Specification (CSP-9-111S2) contain ``Banned Substances'' defined CSP-9-111S2. Leadfree products RoHS compliant. critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
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