55V High Efficiency Buck-Boost Power Manager and Monolithischer
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6A Monolithic Synchronous DC/DC Step-Down Converter Monolithischer, synchroner 6A-DC/DC-Abwärtswandler 6A Monolithic Synchronous DC/DC Step-Down 55V High Efficiency Buck-Boost Power Manager Converter and with Digital Power System Management mit digitalem Power System Management with Digital Power System Management Multi-Chemistry Battery Charger Design Note Note 554 Design 554 DesignNote Note 554 Haoran Wu Design Haoran Wu 531 HaoranZhao Wu Charlie Einführung Digital Power System Management (PSM) controlController mit digitalem Power System Management (PSM) lers usually target high current point-of-load (POL) Digital Power System Management (PSM) controlIntroduction sind in der Regel für Point-of-Load-Anwendungen (PoL) applications. Lowerhigh current applications, with(POL) upmit to lers usually target current point-of-load Today, battery chargers are expected to easily support hohen Stromstärken vorgesehen. Allerdings können auch 6A load current, can also benefit from PSMwith features. applications. Lower current applications, upAnto awendungen variety battery and accept range of ®mit geringeren Strömen bisfrom maximal 6a Afeatures. von den 3815 iscan achemistries 6Aalso monolithic synchronous stepThe LTCofcurrent, 6A load benefit PSM PSM-Features LTC®3815 ein solar für 6 Apanels. ausgelegter, voltage inputs, including wide-ranging It is ® profitieren. down converter digital power monitoring and 3815 is with a 6ADermonolithic synchronous stepThe LTC monolithischer synchroner Abwärtswandler mit digitalen Leisincreasingly common for input voltage ranges to span control features. with digital power monitoring and down converter tungsüberwachungsundoutput Regelungsfunktionen. above andfeatures. below the battery voltage, requiring control The LTC3815 uses a phase lockable(buck-boost controlled Der Baustein basiert auf einer Current-Mode-Architektur mitonder both step-down and step-up capability toMöglichkeit einer phasenstarr geregelten Einschaltzeit und kontime, constant frequency, current mode architecture, The LTC3815 uses a phase lockable controlled onpology). The LTC4020 buck-boost power manager and stanter Diese Architektur zeichnet sich that provides extremely fast load step transient time,Schaltfrequenz. constant frequency, current mode architecture, multi-chemistry battery-charging controller can durch take einresponse extrem schnelles Ansprechen auf load Lastsprünge beiIt miniwith minimum output capacitance. also that provides extremely fast step transient wide-ranging 4.5V to 55V inputs and produce output maler Ausgangskapazität aus. Der Baustein erlaubt required auch den enables operation at the very low on-times response with minimum output capacitance. It also voltages 55V.kurzen Its buck-boost DC/DC controller Betrieb mitup dentosehr Einschaltzeiten, die zur Regelung to regulate low and output high switching enables operation atsystem thevoltages veryvoltages low at on-times required supports battery above, below, geringer Ausgangsspannungen bei hohen Schaltfrequenzen frequencies for minimum solution size. The output to regulate low output voltages at high switching or equal tosind, the um input voltage. erforderlich kleine Lösungsabmessungen zu erzielen. voltage is programmable from 0.4V to 72% ofexterthe frequencies for minimum solution size. The Mit einem einzigen externen Widerstand oder mit eineroutput input voltage with a single external resistor or with an voltage is programmable from 0.4V to 72% of nen Bezugsspannung am Referenzeingang (REF) lässt sich the die C1, 0.1µF external voltage reference through the reference (REF) input voltage with a single external resistor or with an Ausgangsspannung auf Werte zwischen100V,0,4 V und 72 % der Ein0603 gangsspannung regeln. Aufgrund weiten Versorgungsinput pin. The operating supplyseines voltage range is from spannungsbereichs von 2,25 V bis 5,5 V eignet sich 2.25V to 5.5V, making itsupply suitable for operation from input pin. The operating voltage rangederisBaustein The charger is easily optimized a variety of battery für den Betrieb 2,5 V, 3,3 oder Vfor sowie für die Versorgung 2.5V, 3.3V or an 5V input rails or5lithium-ion batteries. 2.25V to 5.5V, making itVsuitable for operation from chemistries. For instance, it can follow a constantdurch Lithium-Ionen-Akkus. 2.5V, 3.3V or 5V input rails or lithium-ion batteries. current/constant-voltage (CC/CV) charge algorithm, 6A Converter 6-A-Wandler mitat1 1MHz MHz Schaltfrequenz with either C/10 or timed termination forwith lithium-based 6A Converter at 1MHz Figure 1 a typical application an input Bild 1 zeigtshows eine typische Anwendung mit einem Eingangsspanbattery systems, a constant-current (CC) nungsbereich vonof 2,25 V bis 5,5 V5.5V und einer voltage range toapplication andAusgangsspannung ancharacteristic output of Figure 1 shows a 2.25V typical with an input with timed an 5.5V optimized 3-stage von 1,8 beitermination, 6 A. of 2.25Vorto 1.8V atV6A. voltage range and 4-step, an output of lead-acid Die Wirkungsgradkurve zur Schaltung aus Bild 1 ist in Bild 2 1.8V at 6A.charge profile. The efficiencyDacurve for the selbst circuitbeiin1 Figure is wiedergegeben. der LTC3815 MHz auf1 einen 6.3A Charger for 25.2V Battery Float Voltage shown in Figure 2. Since the LTC3815 can achieve The efficiency curve for circuit in Figure 1 relativ hohen Wirkungsgrad kommt, kann eine kleine Spule is verrelatively highumefficiency even at 1MHz, small shown Figure 2. Since the LTC3815 candieaachieve Figure 1inshows a den 15V to 55V input, 25.2V/6.3A buckwendet werden, Gesamt-Platzbedarf und Größe der inductor can be charger, used toDieser minimize total relatively high efficiency even atthe a small Leiterplatte zu minimieren. Baustein eignet sich deshalb high footprint efficiency boost battery featuring a1MHz, besonders gut für Anwendungen, in denen die Leiterplattenfläand boardcan size, part especially suitable inductor bemaking usedsynchronous to this minimize the total footprint 4-switch (M2–M5) buck-boost DC/DC che applications oder die size, zulässige Bauhöhe der verwendeten Komponenten for where board space or component and board making this part especially suitable L, LT, LTC, LTM, Linear Technology and the Linear logo are registered sehrapplications begrenzt ist. where height isandlimited. for boardof Linear space or component trademarks PowerPath is a trademark Technology Corporation. All other trademarks are the property of their respective owners. height is limited. L, LT, LTC, LTM, Linear Technology, LTpowerPlay and the Linear logo are external voltage reference through the reference (REF) VIN 15V TO 55V C2 56µF 63V 63HVH56M + + C3 56µF 63V 63HVH56M R38 R1 100k VIN5.1Ω 0805 2.25V TO 5.5V C23 VR2IN C16 510k 4.7µF TO 5.5V 2.25V 100V 1210 GND R4 51k C40 0.22µF 0603 PMBUS PMBUS CSS 15nF CSS C39 15nF 0.22µF 0603 R8 226k 0603 0.1% R14 10k SHDN VIN_REG RNG/SS ILIMIT CSLEW 1nF CSLEW RT VOUT 1nF 11.8k, 1% RT R9 226k 11.8k, 1% 0603 RREF2 R10 3.7k R24.9k REF2 0.1% 0.5% 3.7k 0.5% C4 100pF 0603 SENSVIN SENSTOP LTC4020 INTVCC R5 OPT VBAT MODE PVIN 1% R11 24.9k 1% VFBMIN VFBMAX VFB REF1 R 14.3k RREF1 0.5% FBG 14.3k 0.5% NTC CSOUT MODE TIMER RT RCBRT1 0.002Ω 1W 2512 PVIN C21 10µF 6.3V 0805 PVIN SCL,STAT2 SDA, ALERT STAT1 registered trademarks of Linear Technology Corporation. All other trademarks L, LT, LTC, LTM, Linear Technology, LTpowerPlay and the Linear logo are are the property of their respective owners. registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. VIND1 SBR0560S1 R27 3k VIN MODE/SYNC RUN_MSTR MODE/SYNC RUN_STBY C19 RUN_MSTR D2 SBR0560S1 D3 RED R26 SCL,BST1 SDA, ALERT 3k MARGIN BST2 C20 L WP 0.22µF 0.22µF MARGIN 25V 25V 330nH LTC3815 RUN_STBY PGOOD 0603 0603 L WP SW1 SW2 SW CLKOUT LTC3815 D6 330nH L1 M2 PGOOD TG1 B360A 5.6µH VCC_SENSE SiR664DP SW SS/TRACK CLKOUT M3 WÜRTH 7443556560 SiR422DP VCC_SENSE BG1 M4 V SS_SENSE SS/TRACK SiR664DP R SENSBOT C1 CSLEW RCBRB1 C12 1k 0.002V ΩSS_SENSE 0.033µF RC1M5 1W DAOUT SiR422DP CSLEW SENSGND 2512 1k RT DAV FB OUT BG2 PGLIM RT TG2 VITH FB CSP REF R20R PGLIM R19 RCBAT1 C2 ITH C11 100Ω 20Ω ASEL PGFD 5.49k CC20.008Ω 4.7µF 1W REF R18RC2 6.3V 4.7nF 2512 100Ω ASEL PGFD 0603 5.49k CC2 CSN RPGFD RASEL 4.7nF BGATE RPGFD RASEL VBAT CC1 VC 47pF ITH R15 R16 CC1 36k 47k 0603 0603 47pF CIN 22µF CIN D4 ×4 GRN22µF ×4 VOUT 1.8V VOUT 6A C14 C27 COUT 1.8V + 10µF 10µF 35V 35V 100µF 6A COUT 1210 1210 ×2 100µF C18 C28 ×2 10µF 10µF 35V 1210 35V 1210 M1 Si7145DP C15 220µF 35V 35HVH220M C17 220µF 35V 35HVH220M VOUT 21V TO 28V 8A MAX + GND BAT 25.2V FLOAT 6.3A MAX DN5HW2 GND F01 DN5HW2 F01 SGND 1.8V/6A SGND PGND OutputC6High Efficiency C5 FigureC50.22µF 1. AR13 1MHz, Converter Featuring the LTC3815 100k 6.8nF 47pF 0603 Figure 1. A 1MHz, 1.8V/6A Output0603High 0603 Efficiency Converter Featuring the LTC3815 Bild 1. Hocheffizienter Wandler auf Basis des LTC3815 mit 1 MHz Schaltfrequenz und 1,8 V/6 A am Ausgang dn531 F01 09/16/554 09/16/554 09/16/554 10/14/531 Figure 1. 15V to 55V Input, 25.2V/6.3A Buck-Boost Battery Charger EFFICIENCY EFFICIENCY (%) (%) EFFICIENCY EFFICIENCY(%) (%) V übersteigt. Fällt die Spannung anschließend wieder unDer MCB optionaler externer crowbar Crowbar-Baustein, der an den von 0,5reset. MCB is ist anein external optional device residing These three pins give added flexibility to to MCB is an external optional crowbar device residing been been reset. These three pins give added flexibility 100 ter 0,5 V, wird das Schalten jedoch erst dann wieder ermöglicht, Ausgang angeschlossen wird. Sobaldexceeds die Ausgangsspannung ei- Um 100 . If the output voltage an adjustable onon VOUT tailor the behavior of the LTM4641. beispielsweise VOUT auf Margin-High-Wert zu begrenoutputüberschreitet voltage exceeds an adjustable VOUT. If the tailor the behavior of den thewurde. LTM4641. wenn das Latch zurückgesetzt Diese drei Pins bieten zunen einstellbaren Grenzwert (voreingestellt ist eine zen, MCB is an external optional crowbar device residing been reset. These three pins give added flexibility to muss in LTpowerPlay lediglich der Parameter OPERATION threshold —default value is 11% above nominal— threshold —default value is 11% above nominal— sätzliche Flexibilität, um das Verhalten des LTM4641 individuell Ansprechschwelle von 11 % über der Nennspannung), legt der 80 V auf MarginHigh geändert werden, bevor zum Übertragen dieser IN . If the output voltage exceeds an adjustable on V tailor the behavior of the LTM4641. thethe LTM4641 pulls itsits CROWBAR output logic high 80 OUT VIN+ CIN(MLCC) LTM4641 pulls CROWBAR output high einzustellen. LTM4641 seinen CROWBAR-Ausgang umgehend (d.nominal— h.logic mit einer +CIN(BULK) 10µFCIN(MLCC) Registerwerte an den LTC3815 auf den Button ‚W (PC to RAM)‘ threshold —default value is 11% above immediately (500ns response time, maximum) and C IN(BULK) ×2 10µF immediately (500ns500 response time,High maximum) and geklickt Reaktionszeit von maximal ns) auf logisch und schaltet VINH springt die ×2 erfolgreich, VIN wird. War der Schreibvorgang VINH 60 the LTM4641 pulls its CROWBAR output logic high VINL latches off itsits output voltage: theab. power stage becomes CIN(MLCC) + 60off VINL latches output voltage: the power stage becomes seine Ausgangsspannung dauerhaft Die Leistungsstufe wird Ausgangsspannung auf 1,05 V, wie es im Telemetrie-Diagramm RTUV 10µF C IN(BULK) immediately (500ns response time, maximum) and high impedance, with both internal toptop andand bottom UVLO < 0.5V = OFF ×2UVLO hochohmig, und der obere interne MOSFET wird ebenso wie der von Bild 5 zu sehen ist. RTUV high impedance, with both internal bottom < 0.5V = OFF UVLO VINH VINL latches off its output voltage: the power stage becomes UVLO MOSFETs latched off. The CROWBAR output turns on 40 untere abgeschaltet. Der CROWBAR-Ausgang schaltet MCB ein, RHYST 100 latched off. The CROWBAR output turns on LTM4641 MOSFETs RBUV 40 RTUV RHYST LTM4641 R 100 BUV high impedance, with both internal top and bottom UVLO < 0.5V = OFF HYST MCB, discharging the output capacitors and preventing wodurch die Ausgangskondensatoren entladen werden und ein MCB, discharging the output capacitors and preventing HYST HYST PULLS UP WHEN UVLO HYST PULLS UP WHEN MOSFETs latched The CROWBAR output turns on any further excursion of of thethe output voltage. weiteres Ansteigen deroff. Ausgangsspannung unterbunden wird. ON, HYST PULLS DOWN RHYST 20 positive LTM4641 R any further positive excursion output voltage. BUV ON,WHEN HYST OFF PULLS DOWN 2080 MCB, discharging output capacitors and FORCED CONTINUOUS MODEpreventing 80 MSP ist the WHEN OFF HYST R Der Baustein zwischen die eingangsseitige SpannungsTOV FORCED CONTINUOUS MODE R HYST PULLS UP WHEN IOVRETRY > 0.5V = OFF ) MSP is placed between the input power source (V TOV DISCONTINUOUS MODE IN > 0.5V = OFF MSP placed the(Vinput power source (V ) IOVRETRY DISCONTINUOUS MODE any further positive excursion of the output voltage. quelle (VINis ) und den between Eingangs-Pin ON, IOVRETRY HYST PULLS DOWN INH) der Leistungsstufe desIN IOVRETRY 0 ), and is and the LTM4641's power stage input pins (V WHEN OFF 60 INH 0 R MOV ), and is and the LTM4641's power stage input pins (V LTM4641 geschaltet. Der Baustein dient 0.01 0.1 1als rückstellbarer 10INH elektRTOV R 60 MOV OVLO > 0.5V =>LATCHOFF 0.01 0.1 the input 1 power source 10 switch. IOVRETRY 0.5V = OFF ) MSP is placed between (V used as a resettable electronic power-interrupt OVLO > 0.5V = LATCHOFF OVLO IN LOAD CURRENT (A) IOVRETRY used as a resettableLOAD electronic power-interrupt switch. ronischer Stromkreisunterbrecher. Sobald SchaltunOVLO CURRENT (A) die internen DN5HW2 F02 SGND GND RRBOV ), and is and the LTM4641's power stage input pins (V When a fault condition, such as an output overvoltage DN5HW2 F02 INH SGND GND R MOV gen des LTM4641 einen Fehler wie etwa eine Überspannung am 40 When a fault condition, such as an output overvoltage BOV Figure 2. Efficiency Curves at V = 5V, V = 1.8V, IN OUT OVLO > 0.5V = LATCHOFF Figure 2. Efficiency Curves at V = 5V, V = 1.8V, 40 IN OUT Bild 2. Wirkungsgradkurven bei V = 5 V, V = 1,8 V used as a resettable electronic power-interrupt switch. OVLO (OOV) condition, is detected by the internal IN LTM4641’s OUT Figure 4. LTpowerPlay Main Interface Ausgang (Output Overvoltage – OOV) registrieren, wird das Gate f = 1MHz (for the Circuit in Figure 1) (OOV) condition, is detected by the LTM4641’s internal Figure 4. LTpowerPlay Main Interface SW = 1MHz fSW (for (für the Circuit 1) 1) SGND GND und =einer 1 MHz diesuch Schaltung Bild RBOV When condition, asFigure aninoutput overvoltage circuitry, the gate of MSP isin discharged 2.6μs SGND CONNECTS TO GND INTERNAL TO MODULE. des MSPfaSW infault Zeitspanne von maximal 2,6 µswithin entladen, wocircuitry, SGND CONNECTS TO GNDSEPARATE INTERNAL FROM TO MODULE. 20 the gate of MSP is discharged within 2.6μs KEEP SGND ROUTES/PLANES GND Figure 3 shows the thermal footprint of the LTC3815 (OOV) condition, is detected by the LTM4641’s internal KEEP SGND ROUTES/PLANES SEPARATE FROM GND 20 and (maximum) MSP turns off. The input source supdurch der MSP abschaltet. Damit wird dieThe Stromversorgung vom ON MOTHERBOARD FORCED CONTINUOUS MODE Figure 3 theMSP thermal footprint of the LTC3815 (maximum) and turns off. input source supON MOTHERBOARD Bild 3 zeigt shows ein Wärmebild des LTC3815 beiMODE Volllast. Auch ohne FORCED CONTINUOUS MODE DISCONTINUOUS at full load. The IC remains cool at full load even Vply -Anschluss, dem Eingang der Leistungsstufe des LTM4641, circuitry, the gate of MSP is discharged within 2.6μs SGND CONNECTS TO GND INTERNAL TO MODULE. isfullis thus disconnected from thethe LTM4641’s INH atply load. TheICICselbst remains cool at full loadpower even DISCONTINUOUS MODE thus disconnected from LTM4641’s power Luftstrom bleibt das unter diesen Bedingungen kühl. KEEP SGND ROUTES/PLANES SEPARATE FROM GND 0airflow—the Figure 2. 2. Circuit to to SetSet thethe Input UVLO, IOVRETRY getrennt. Die gefährliche Eingangsspannung kann auf diese without temperature rise at the hot (maximum) and MSP turns off. The input source sup), preventing the hazardous (input) stage input (V ONCircuit MOTHERBOARD 0 Figure Input UVLO, IOVRETRY INH without airflow—the temperature rise at the hot 0.01 0.1 1 10 Derstage Temperaturanstieg am wärmsten Punkt beträgt lediglich ), preventing the hazardous (input) input (V INH 0.01 0.1 1 10 and OVLO Thresholds Weise nicht mehr an den wertvollen Verbraucher gelangen. Zur spot is only 37.4°C. ply is thus disconnected from the power LOAD CURRENT (A)LTM4641’s voltage from reaching the precious load. LTM4641 and OVLO Thresholds spot is only 37.4°C. +37,4 °C. voltagedes from reaching the precious load.F02ferner LTM4641 LOAD CURRENT (A) LTM4641 DN5HW2 Erzeugung OOV-Grenzwerts nutzt der eine Figure 2. Circuit zum to Set the Input IOVRETRY Bild 2. Beschaltung Festlegen derUVLO, Ansprechschwellen ), preventing the hazardous (input) stage input (V DN5HW2 F02 also uses an independent reference voltage generINH Figure 2.an Efficiency Curves at V = 5V, VOUTto = 1.8V, also uses independent reference voltage to gener- Efficiency IN unabhängige Referenzspannung, die nicht mit der Bandlücken and OVLO Thresholds Figure 2. Efficiency Curves at V = 5V, V = 1.8V, für UVLO, IOVRETRY und OVLO IN OUT Figure 4. LTpowerPlay Main Interface voltage from reaching the precious load. LTM4641 Efficiency ate an OOV threshold, separate from the control IC’s fSWan = 1MHz (for the Circuit in Figure 1) Bild 4. Startseite von LTpowerPlay ate OOV threshold, separate from Figure 4. LTpowerPlay Main Interface (bandgap) -Spannung zusammenhängt. fSW = 1MHz (fordes theRegelungs-IC Circuit in Figure 1) the control IC’s Figure Effizienz3 below shows the efficiency curves for the also uses an independent reference voltage to generbandgap voltage. Figure 3 below shows the efficiency curves for the bandgap voltage. Efficiency the thermal footprint of the LTC3815 Bild 3 zeigt for diefor typischen Wirkungsgradkurven des LTM4641 bei a typical 12V input voltage forfor thethe circuit ateFigure 3 an OOVshows threshold, separate from the control IC’s LTM4641 Figure 3 shows the thermal footprint of the LTC3815 LTM4641 a typical 12V input voltage circuit waveforms Figure 1 shows the CROWBAR and V Bild 1 zeigt den Verlauf der CROWBAR-Spannung und von V , at full load. The IC remains cool at full load even OUT einer typischen Eingangsspannung von 12 V für die Schaltung aus Figure 3 below shows the efficiency curves for the OUT in Figure 1. With all the protection circuits, LTM4641 waveforms Figure 1 shows the CROWBAR and V bandgap voltage. OUT load even at der full load. The IC(Mremains cool atesfull in Figure 1. With all the protection circuits, LTM4641 wenn MOSFET )TOP undcausing zu at einem fails, a the shortwhen theobere top MOSFET Mtemperature Bild 1.still Auch mit allen Schutzschaltungen kommt der auf without airflow—the rise hot can TOP LTM4641 for a typical 12V input voltage forLTM4641 the circuit achieve high efficiency. causing a Kurzshortwhen the top MOSFET Mausfällt TOP fails, rise without airflow—the temperature at the hot can still achieve high efficiency. schluss zwischen VINthe undCROWBAR demand Knoten SW kommt. Das CROW- eine waveforms Figure 1 shows and V SW nodes. CROWBAR circuit between V hohe Effizienz. OUT spot is only 37.4°C. IN in Figure 1. With all the protection circuits, LTM4641 circuit the V and SW nodes. CROWBAR spothigh is between only 37.4°C. BAR-Signal wechselt binnen IN 500 nsfails, in den High-Status und 95 causing a to shortwhen the topwithin MOSFET M goes within 500ns and turns on MCB to short TOP 95 high efficiency. goes high 500ns and turns on MCB short can still achieve schaltet damit den MCB ein, der den Ausgang mit der Masse and SW nodes. CROWBAR circuit between the V never exceeds 110% of the thethe output to ground. IN OUT 90 neverauf exceeds output to ground. VOUT 90 verbindet. VOUT steigt zu500ns keinem Zeitpunkt mehr als110% 110 %of derthe 95 goes high within and turns on MCB to short specified output voltage. specified output voltage. 85 Nenn-Ausgangsspannung an. the output to ground. VOUT never exceeds 110% of the 90 85 Input Overvoltage and Undervoltage Protections Überund Unterspannungsschutz für den Eingang Figure 5. Telemetry Telemetry Plot Plot after after Issuing Issuing aa Input Overvoltage and Undervoltage Protections 80 specified output voltage. Figure 5. 6.0VOUT 85 80 MarginHigh Command through through LTpowerPlay 6.0VOUT Der Eingang des LTM4641 ist mit einem Überund UnterspanThe LTM4641 has input undervoltage and overvoltage 5.0V MarginHigh Command LTpowerPlay OUT The LTM4641 has input undervoltage and overvoltage 5.0VOUT 75 3.3V Input Overvoltage and Undervoltage Protections OUT nungsschutz versehen, dessen Ansprechschwellen Benutzer protections, whose tripdie thresholds be1vom setset byby thethe Bild 3.Figure Wärmebild für Schaltung Bild 3.3VOUT 80 75 2.5V 3.whose Thermal Picture @ VVincan = 5V, protections, trip thresholds can be OUT 6.0V IN = 5V, OUTOUT 2.5V FigureV,refer 3. Thermal Picture to the margin margin high high For example, example, to margin margin VVOUT 1.8V gewählt können (Bild 2). 70 Vhas =input 1,8 V/6 A,2.FSW@ = 1IN MHz beiLTM4641 Vwerden OUT The undervoltage and overvoltage user. Please Figure to the For to 5.0V INV= 5 = 1.8V/6A, OUT to OUTOUT 1.8V FSW = 1MHz, No Airflow, OUT 70 OUT = 1.8V/6A, user. VPlease refer to Figure 2. 1.5V OUT FSW = 1MHz, No Airflow, 75 3.3V OUT value, in LTpowerPlay, simply change OPERATION OUTOUT 1.5V (ohne Luftstrom bei T = +25 °C) Der UVLO-Pin (UVLO = Undervoltage-Lockout) ist direkt mit dem protections, whose thresholds can1) be set by the value, in LTpowerPlay, 1.2V A Circuit simply change OPERATION TA = 25°C (fortrip the in Figure Figure 1) OUT 2.5V 65 OUTOUT 1.2V TA = 25°C (for the Circuitinto in The UVLO pin feeds directly thethe inverting input OUT(PC to RAM)” icon to MarginHigh, MarginHigh, then click click the the1.0V “W 1.8V invertierenden Eingang Komparators verbunden, dessen 70 65 then The UVLO pin feeds directly inverting input to OUT 1.0V user. Please refer toeines Figure 2. into OUT to RAM)” icon “W (PC 0.9V OUT 1.5V OUTOUT ofPower a comparator whose trip threshold is is 0.5V. Power Management Features 60 System Management Features to write write these these values to0.9V the LTC3815. When Ansprechschwelle 0,5 Vwhose beträgt. Wenn die Spannung amWhen UVLOof aSystem comparator trip threshold 0.5V. When to 1.2V 60 register Power System Management Features OUT When 1 2 3 values 7 8LTC3815. 9 10 4 5 to 6 the 650 register 0 1 3 5 7 Ausgabe 2 4 6 8 9 10 The UVLO pin feeds directly into the inverting input 1.0V theThe UVLO pin falls below 0.5V, switching action is Der LTC3815 bietet eine Reihe von PSM-Funktionen. Dazu Bild 5. Telemetrie-Diagramm nach OUT Pin auf unter 0,5 V fällt, wird das Schalten des Wandlers unterthe write is successful, the output voltage jumps to OUTPUT CURRENT (A) Figure 5. Telemetry Plot after Issuing a LTC3815 includes a number of PSM functions, the LTC3815 UVLO pinincludes falls below 0.5V,ofswitching action is the write is successful, the voltagea jumps to 0.9VOUTIssuing OUTPUT CURRENT (A) aan number PSM functions, Figure 5. Telemetry Plotoutput after MarginHigh-Befehls durchLTpowerPlay LTpowerPlay gehört die digitale Steuerung des Output Marginings (±25 % 1.05V eines ofThe a comparator whose trip threshold is 0.5V. When 60 inhibited; when the UVLO pin exceeds 0.5V, switching bunden. Sobald die Spannung UVLO wieder über 0,5 V ansteigt, MarginHigh Command through on the telemetry plot (Figure 5). including digital control of output margining (±25% inhibited;digital when control the UVLO pin exceeds 0.5V, switching 1 Command 2 3 plot 4 5through 6 7 LTpowerPlay 8 9 10 1.05V MarginHigh on the 0telemetry (Figure 5). including of 0.5V, output margining (±25% mit 0,1 %Schalten Auflösung), dasbelow Auslesen desPins Fehlerstatus sowie dieis the UVLO pin fallsThe switching action Bild 3. Wirkungsgrad-Kennlinien LTM4641 kann das wieder beginnen. Die IOVRETRY und OVLO Figure 3. 3. Efficiency Curves LTM4641 action can resume. IOVRETRY and OVLO pins each OUTPUT CURRENT (A)ofdes with 0.1% resolution) readback ofVand fault status and Figure Efficiency Curves of LTM4641 action can resume. The IOVRETRY OVLO pins each Figure 3. Thermal Picture @ = 5V, with 0.1% resolution) readback of fault status and Fazit Conclusion Überwachung des Einund Ausgangsstroms, der Einund AusIN sind direkt an die nicht invertierenden Eingänge von Komparatoinhibited; when the UVLO pin exceeds 0.5V, switching For example, to margin VOUT to the margin high Fazit Conclusion feed directly into noninverting inputs comparators Figure 3. Thermal Picture @ VINof = 5V, monitoring of time-averaged (~4ms) and peak input/ feed directly into noninverting inputs of comparators to the margin high ForLTC3815 example, toamonolithischer, margin VOUTsynchroner VOUT = 1.8V/6A, FSW = 1MHz, No Airflow, monitoring of time-averaged (~4ms) and peak input/ Der ist is ein 6 A DC/DC-Abgangsspannung und derThe Temperatur (zeitlich gemittelt über ca. Conclusion ren geführt, deren Ansprechschwellen ebenfalls 0,5 Vpins betragen. The LTC3815 6A überwacht monolithic synchronous buck Efficiency Curves of LTM4641 V = 1.8V/6A, FSW = 1MHz, No Airflow, action can resume. IOVRETRY and OVLO each value, inFigure LTpowerPlay, simply change OPERATION whose trip thresholds are 0.5V. When the IOVRETRY Das µModule LTM4641 die Eingangsspannung, die OUT The LTC3815 is 3. a 6A monolithic synchronous buck Conclusion output current, input/output voltage and temperature. TA = 25°C (for the Circuit in Figure 1) whose trip thresholds are 0.5V. When the IOVRETRY value, in LTpowerPlay, simply change OPERATION wärtswandler mit digitalem Power System Management. Der 4Steigt ms oder Maximalwert). Der LTC3815 verfügt zwar über keinen output current, input/output voltage and temperature. die Spannung am Pinthe IOVRETRY aufFigure über 0,5 wird The TA = 25°C (for Circuit in 1)V an, so regulator with digital digital power system management. Ausgangsspannung und click die Temperaturbedingungen. Der Baufeed directly into noninverting inputs of comparators to MarginHigh, then the “W (PC to RAM)” icon pin exceeds 0.5V, switching action is inhibited; when LTM4641 μModule regulator monitors input regulator with power system management. The LTC3815 does not have internal NVM (nonvolatile pin exceeds 0.5V,not switching action is inhibited; when The LTM4641 μModule regulator monitors input tooffers MarginHigh, then click the “W (PC toapplications RAM)” icon empfiehlt sich als komplette Lösung für Anwenduninternen nichtflüchtigen Speicher (NVM), jedoch kann die AusThe LTC3815 does have internal NVM das Schalten des Wandlers ebenfalls unterbrochen. Erst wenn die Baustein Itstein a Verbrauchern comprehensive solution for Conclusion bietetathese wie etwa Prozessoren, ASICs und anPower System Management Features tooffers write register values to thefor LTC3815. When whose trip thresholds are 0.5V. When the(nonvolatile IOVRETRY IOVRETRY falls below 0.5V, switching action can output voltage and temperature conditions. comprehensive solution applications memory), but the output voltage canwerden. be set through gen, die nach einem einfachen, kompakten und hocheffizienIOVRETRY falls below 0.5V, switching action can Itvoltage, gangsspannung über den PMBus eingestellt Der Zugriff PoweranSystem Management voltage, output voltage and temperature conditions. to write these register values to the LTC3815. When Spannung IOVRETRY wieder mehr alsFeatures 0,5 Vbe beträgt, wird das memory), but the output voltage can set through spruchsvollen FPGAs einen umfassenden elektrischen undinput therrequiring simple, compact and high efficiency design the write is successful, the output voltage jumps to pin exceeds 0.5V, switching action is0.5V, inhibited; when requiring The LTM4641 μModule regulator monitors resume. When the OVLO pin switching ® It can provide comprehensive electrical and thermal The LTC3815 includes aDas number of PSM functions, simple, compact and high efficiency design PMBus. PSM functions can beexceeds accessed using Linear’s Design verlangen und gleichzeitig digitale Konfigurationsauf die PSM-Funktionen istOVLO mithilfe der LTpowerPlay -Software, resume. When the pin exceeds 0.5V, switching the write is successful, the output voltage jumps to Itwell can provide comprehensive electrical and thermal Schalten wieder freigegeben. Schalten des Wandlers wird ten PMBus. PSM functions can be accessed using Linear’s The LTC3815 includes a number of PSM functions, mischen Schutz vor überhöhten Spannungen. as as digital configuration and monitoring func® 1.05V onoutput the telemetry plot (Figure 5). IOVRETRY falls below 0.5V, switching action can voltage, voltage and temperature conditions. action is inhibited; when OVLO subsequently falls below protection from excessive voltage stress for loads such including digital control of output margining (±25% as well as digital configuration and monitoring funcund Überwachungsfunktionen benötigen, wie sie sonst nur in eine PC-basierte, einfach zu bedienende grafische Benutzer® software, an easy to use PC-based free LTpowerPlay action isunterbunden, inhibited; when OVLO subsequently falls below tions auch dann wenn die Spannung anuse OVLO die Marke 1.05V on the telemetry plot (Figure 5). protection from excessive voltage stress for loads software, an easy to PC-based free LTpowerPlay including digital control of output margining (±25% usually reserved for much much higher power POLsuch resume. When the OVLO pin exceeds 0.5V, switching It can provide comprehensive electrical and thermal 0.5V, switching action cannot occur until the latch has with 0.1% resolution) readback of fault status and as processors, ASICs and high end FPGAs. PoL-Wandlern mit deutlich höherer Leistung zu finden sind. tions usually reserved for higher power POL oberfläche, möglich (Bild 4). GUI, shown in Figure 4. 0.5V, switching action cannot occur until the latch has Conclusion as processors, ASICs and high end FPGAs. AN527 F02 AN527 F02 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) AN527 F02 DN527 F03 DN527 F03 DN527 F03 GUI, in Figure 4. readback of fault status and converters. withshown resolution) Conclusion action is0.1% inhibited; when OVLO subsequently falls input/ below converters. protection from excessive voltage stress for loads such monitoring of time-averaged (~4ms) and peak monitoring of time-averaged (~4ms) and peak input/ The LTC3815 is a 6A monolithic synchronous buck 0.5V, switching action cannot occur until the latch has as processors, ASICs and highhelp, end FPGAs. buck output current, input/output voltage and temperature. Data Sheet Download The LTC3815 isFor a 6A monolithic synchronous applications Data Sheet Download output current, input/output voltage and temperature. regulator with For digital power system management. applications help, Data Sheet Download For applications help, The LTC3815 does not have internal NVM (nonvolatile Bei technischen Fragen, regulator with digital power system management. Data Sheet Download call (408) (408)For 432-1900, Ext. help, 3061 www.linear.com/LTC3815 applications The LTC3815 does not have internal NVM (nonvolatile It offers a comprehensive solution for applications call 432-1900, Ext. 3061 www.linear.com/LTC3815 call (408) 432-1900, Ext. 3979 www.linear.com/LTM4641 www.linear.com/LTC3815 Telefon +49 89 96 24 55 0 memory), but the output voltage can be set through It offers a comprehensive solution for applications callcompact (408) 432-1900, Ext. 3979 www.linear.com/LTM4641 memory), but the output voltage can be set through requiring simple, and high efficiency design Data Sheet Download applications help, PMBus. PSM functions can be accessed using Linear’s requiring simple, For compact and high efficiency design DN554 LT/AP 0916and 71K •monitoring PRINTED IN THE USA PMBus. PSM functions can be accessed using Linear’s as well as digital configuration funcDN554 LT/AP 0916 71K • PRINTED IN THE USA ® call (408) 432-1900, Ext. 3979 www.linear.com/LTM4641 software, an easy to use PC-based free LTpowerPlay as well as digital configuration and monitoring Linear Technology Corporation 554 dn527 LT/AP 0614 111K • PRINTED IN funcTHE USA ® Linear Technology Corporation dn527 LT/AP 0614 111K • PRINTED IN THE USA software, an easy to use PC-based free LTpowerPlay tions usually reserved for much higher power POL Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, Milpitas, CA 95035-7417 95035-7417 GUI, McCarthy shown in Blvd., Figure 4. tions usually reserved for much higher power POL Linear Technology Corporation 1630 CA GUI, shown in Figure 4. converters. ●Blvd., ● 95035-7417 1630 McCarthy Milpitas, CA●CA (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2016 ● FAX: 1630 McCarthy Blvd., Milpitas, 95035-7417 dn527 LT/AP 0614 111KCORPORATION • PRINTED IN THE converters. (408) 432-1900 (408) 434-0507 www.linear.com LINEAR TECHNOLOGY 2016USA ● ● Linear Technology Corporation (408) 432-1900 FAX: (408) 434-0507 ● FAX: ● www.linear.com (408) (408) 434-0507www.linear.com Data432-1900 Sheet Download DataMcCarthy Sheet Download 1630 Blvd., Milpitas, CA 95035-7417 www.linear.com/LTC3815 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com www.linear.com/LTC3815 LINEAR TECHNOLOGY CORPORATION 2014 LINEAR TECHNOLOGY CORPORATION 2014 For applications help, For applications help, call (408) 432-1900, Ext. 3061 LINEAR TECHNOLOGY call (408) 432-1900, Ext. 3061CORPORATION 2014
