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PF175B480M033FP-00

PF175B480M033FP-00

  • 厂商:

    VICOR(威科)

  • 封装:

    -

  • 描述:

    AC/DC CONVERT 48V 10.2A

  • 数据手册
  • 价格&库存
PF175B480M033FP-00 数据手册
End of Life For new designs, VIA PFM AC-DC Converters » are recommended. For more information contact Vicor Applications Engineering: www.vicorpower.com/contact-us » VI BRICK® PFM™ PF175B480C033FP-00 Actual Size: 1.92 x 1.91 x 0.37 in 48,7 x 48,6 x 9,5 mm S ® US C C NRTL US Isolated AC-DC Converter with PFC Features Typical Applications • Isolated AC-to-DC converter with PFC • Telecom (WiMAX, Power Amplifiers, Optical Switches) • Low profile • Automatic Test Equipment (ATE) • Power Density: 243 W/in3 • LED lighting 2 • High Efficiency Server Power 330 W in 3.67 in footprint • Office equipment (Printers, Copiers, Projectors) • High efficiency (~93%) over world-wide AC mains ° • Industrial Equipment (Process Controllers, Material Rectified 85 – 264 VAC Handling, Factory Automation) • Secondary-side energy storage • Switch Mode Power Supplies (SMPS) • Simplified mounting and thermal management • SELV 48 V Output ° Efficient power distribution to POL converters ° 3,000 VAC / 4,242 VDC isolation Product Overview The VI BRICK® PFM Isolated AC-DC Converter with PFC is an AC-to-DC converter, operating from a rectified universal AC input to generate an isolated 48 Vdc output bus with power factor correction. With its ZVS high frequency Adaptive Cell™ topology, the VI BRICK PFM converter consistently delivers high efficiency across worldwide AC mains. Modular PFM converters and downstream DC-DC VI BRICK products support secondary-side energy storage and efficient power distribution at 48 V, providing superior power system performance and connectivity from the wall plug to the point-of-load. • PFC (THD) exceeds EN61000-3-2 requirements • ZVS high frequency (MHz) switching • Low profile, high density filtering • 100°C baseplate operation Major Specifications VIN 85 – 264 VAC (rectified) VOUT 48 VDC (isolated) POUT 330 W Nomenclature Function Input Voltage Designator P 1 F 7 5 Universal (85-264 Vac) Package Size B Output Voltage Vout (V) (x10) 4 Grade C= T= 8 Temperature Grade 0 Operating -20 to 100°C -40 to 100°C C Output Power Pout (W) (÷10) 0 Storage -40 to 125°C -40 to 125°C VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 1 of 20 11/2015 800 927.9474 3 3 Baseplate Pin Style F P Revision – F = Slotted Flange P = Through hole 0 0 End of Life PF175B480C033FP-00 Typical Application: Universal AC Input, Quad Output, 300W Power Supply PRM™ Regulator* 85 264 Vac +OUT +IN Rectifier, Filter, Transient Protection Converter -IN 3.3V 6A Cool-Power® ZVS Buck 1.8V 8A VTM™ Transformer 1.0V 100A 48 V +OUT PFM™ 24 V 7A Cool-Power® ZVS Buck -OUT PRM™ Regulator* -OUT *Vicor recommends the following PRM modules: PRM48JF480T500A00, PRM48JH480T250A00, PR036A480x012xP, PR045A480X040xP 1.0 ABSOLUTE MAXIMUM RATINGS The Absolute Maximum Ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to device. Electrical specifications do not apply when operating beyond rated operating conditions. Positive pin current represents current flowing out of the pin. 1.0 Absolute Maximum Ratings PARAMETER MIN MAX UNIT NOTES Input voltage (+In to -In) Input voltage (+In to -In) Input voltage slew rate RSV1 to –IN EN to –IN RSV3 to –IN Output voltage (+Out to -Out) Output current 0 0 -25 -0.3 -0.3 -0.3 -0.5 0.0 600 385 25 5.3 5.3 5.3 57.0 10.2 Vpk Vpk V/µs VDC VDC VDC VDC A 1 ms max Continuous Common Mode and Differential Mode -55 -20 -40 -40 -40 125 100 100 125 125 °C °C °C °C °C TEMPERATURE Operating junction Operating temperature Storage temperature DIELECTRIC WITHSTAND Dielectric Withstand Input – Output Dielectric Withstand Input – Base Dielectric Withstand Output – Base 3000 1500 1500 VRMS VRMS VRMS VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 2 of 20 11/2015 800 927.9474 Do not connect to this pin 5 V tolerant 3.3 V logic Do not connect to this pin Worst case semiconductor C-Grade; baseplate T-Grade; baseplate C-Grade T-Grade End of Life PF175B480C033FP-00 2.0 ELECTRICAL CHARACTERISTICS Specifications apply over all line and load conditions, 50 Hz and 60 Hz line frequencies, TC= 25°C, unless otherwise noted. Boldface specifications apply over the temperature range of the specified product grade. COUT is 6800 µF +/- 20% unless otherwise specified. 2.0 Electrical Characteristics ATTRIBUTE POWER INPUT SPECIFICATION Input voltage range, continuous operation Input voltage range, transient, non-operational (peak) Input voltage cell reconfiguration low-to-high threshold Input voltage cell reconfiguration high-to-low threshold Input voltage slew rate Input current (peak) Source line frequency range Power factor Input inductance, maximum Input capacitance, maximum NO LOAD SPECIFICATION Input power – no load, maximum Input power – disabled, maximum POWER OUTPUT SPECIFICATION Output voltage set point Output voltage, no load SYMBOL VIN VIN dVIN /dt IINRP fline PF LIN TYP 85 1 ms 145 VIN-CR- 132 Common Mode and Differential Mode -25 h Output voltage ripple, switching frequency VOUT-PP-HF Output voltage ripple line frequency Output capacitance (external) VOUT-PP-LF COUT-EXT TON Start-up setpoint aquisition time Tss Cell reconfiguration response time TCR Voltage deviation (transient) %VOUT-TRANS Recovery time TTRANS Line regulation %VOUT-LINE Load regulation %VOUT-LOAD Output current (continuous) IOUT VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 3 of 20 11/2015 800 927.9474 VRMS VRMS 1.5 1.6 W W 47.5 49 50.5 V 46 51.5 55 V 55 V 330 W 30 92 93.5 % 91 % 92 % 100 300 mV 3.8 5 V 12000 µF 400 1000 ms 400 5.5 500 11 8 500 1 1 6.9 ms ms % ms % % A 250 0.5 0.5 Full load 10% to 100% load See Figure 1, SOA 148 1.1 6000 From VIN applied, EN floating From EN pin release, VIN applied Full load Full load V µF EN floating, see Figure 6 EN pulled low, see Figure 7 POUT 600 1.5 PNL PQ Output power VRMS 1 CIN VOUT-NL 264 V/µs A Hz mH 47 Vin = 230 Vrms, 10% Load Over all operating steady state line conditions Non-faulting abnormal line and load transient conditions See Figure 1, SOA VIN = 230 V, full load, exclusive of input rectifier losses 85 V < VIN < 264 V, full load, exclusive of input rectifier losses 85 V < VIN < 264 V, 75% load, exclusive of input rectifier losses Over all operating steady-state line and load conditions, 20 MHz BW, measured at C3, Figure 29 Over all operating steady-state line and load conditions, 20 MHz BW UNIT 25 12 63 0.9 VOUT MAX 135 Input power >100 W Differential mode inductance, commonmode inductance may be higher. See section 10.12, "Source Inductance Considerations" on Page 19 After bridge rectifier, between +IN and - IN VOUT Output turn-on delay MIN VIN-CR+ Output voltage range (transient) Efficiency CONDITIONS / NOTES End of Life PF175B480C033FP-00 2.0 ELECTRICAL CHARACTERISTICS (CONT.) 2.0 Electrical Characteristics (Continued) ATTRIBUTE SYMBOL CONDITIONS / NOTES MIN TYP MAX UNIT 10.2 A 13.5 µC POWER OUTPUT SPECIFICATION (CONTINUED) Output current (transient) 20 ms duration, average power ≤POUT, max IOUT-PK Output switching cycle charge QTOT Output inductance (parasitic) LOUT-PAR Output capacitance (internal) Output capacitance (internal ESR) POWERTRAIN PROTECTIONS Input undervoltage turn-on Input undervoltage turn-off Input overvoltage turn-on Input overvoltage turn-off Output overvoltage threshold Upper start / restart temperature threshold (case) Overtemperature shutdown threshold (internal) Overtemperature shutdown threshold (case) Undertemperature shutdown threshold (case) Lower start / restart temperature threshold (case) Overcurrent blanking time Input overvoltage response time Input undervoltage response time Output overvoltage response time Short circuit response time Fault retry delay time Output power limit COUT-INT RCOUT Frequency @ 1 MHz, simulated J-lead model Effective value at nominal output voltage VIN-UVLO+ VIN-UVLOVIN-OVLOVIN-OVLO+ VOUT-OVLO+ See Timing Diagram See Timing Diagram 65 265 Instantaneous, latched shutdown 55.3 nH 7 0.5 µF mΩ 74 71 270 273 56.6 83 283 59.0 VRMS VRMS VRMS VRMS V TCASE-OTP- 100 °C TJ-OTP+ 130 °C TCASE-OTP+ 110 °C TCASE-UTP- T, C Grades -61 °C TCASE-UTP+ T, C Grades -52 °C TOC TPOVP TUVLO TSOVP TSC TOFF PPROT Based on line frequency 400 460 Based on line frequency Powertrain on Powertrain on, operational state See Timing Diagram 27 60 39 120 60 10 550 6 51 180 120 330 ms µs ms µs µs s W Full Load Efficiency vs. Line Voltage DC Safe Operating Area 420 94.0 6.00 360 93.5 5.00 300 4.00 240 3.00 180 2.00 120 1.00 60 0.00 0 Efficiency (%) 7.00 Output Power (W) Output Current (A) 1 93.0 92.5 92.0 91.5 91.0 80 100 120 140 160 180 200 220 240 260 85 100 115 130 145 160 175 190 205 220 235 250 265 Input Voltage (VRMS) Input Voltage (V) Current Power Figure 1 — DC output safe operating area TCASE: 100°C 25°C Figure 2 — Full load efficiency vs. line voltage VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 4 of 20 11/2015 800 927.9474 -40°C End of Life PF175B480C033FP-00 3.0 SIGNAL CHARACTERISTICS Specifications apply over all line and load conditions, 50 Hz and 60 Hz line frequencies, TC= 25°C, unless otherwise noted. Boldface specifications apply over the temperature range of the specified product grade. COUT is 6800 µF +/- 20% unless otherwise specified. 3.0 Signal Characteristics • The EN pin enables and disables the PFM converter; when held below 0.8 V the unit will be disabled. • The EN pin can reset the PFM converter after a latching OVP event. SIGNAL TYPE STATE Startup DIGITAL INPUT Standby ATTRIBUTE ENABLE : EN • The EN pin voltage is 3.3 V during normal operation. • The EN pin is referenced to the –IN pin of the converter. SYMBOL CONDITIONS / NOTES EN enable threshold EN disable time EN disable threshold VEN_EN tEN_DIS VEN_DIS From any point in line cycle EN resistance to disable REN_EXT Max allowable resistance to -IN required to disable the module MIN TYP MAX UNIT 2.31 9 16 0.99 V ms V 4.28 kΩ RESERVED : RSV1, RSV3 No connections are required to these pins. In noisy enviornments, it is beneficial to add a 0.1 µF capacitor between each reserved pin and -IN. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 5 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 4.0 FUNCTIONAL BLOCK DIAGRAM +IN Adaptive Cell™ topology Primary & Secondary Powertrain Q1T Q3T CIN-T Top Cell Cell Configuration Controller Q2T Q4T S1 +OUT S3 VIN-B COUT-INT -OUT Q1B Q3B S2 CIN-B Bottom Cell Q2B Q4B -IN 3.3 V Primary-side Voltage Sense VIN-B RSV1 49.9 kΩ Modulator EN RSV3 Powertrain Enable -IN VEAO -IN -IN Micro controller Auto Ranger Control Fault Latch & Reset Logic Enable Microcontroller: Fault monitoring Output OVP Fault Monitoring Output and OCP/SCP PFC Input UVP & OVP Internal OTP / UTP PFC Control Error Amplifier -IN VEAO Output Voltage with Offset Figure 3 — Functional block diagram VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 6 of 20 11/2015 800 927.9474 -IN Reference Voltage with Ripple Twice the Supply Frequency End of Life PF175B480C033FP-00 5.0 HIGH LEVEL FUNCTIONAL STATE DIAGRAM Conditions that cause state transitions are shown along arrows. Sub-sequence activities are listed inside the state bubbles. Application of VIN EN = True and No Faults VIN > VIN-UVLO+ STARTUP SEQUENCE Line Frequency Acquisition tON Expiry Powertrain: Stopped RNG: Auto STANDBY EN = False or VIN Out of Range Powertrain: Stopped RNG: High OPERATIONAL VOUT Ramp Up (tss) Regulates VOUT EN = False or VIN Out of Range Powertrain: Active RNG: Auto PFC: Auto Overtemp, Output Short, or Overload No Faults NON LATCHED FAULT tOFF delay Powertrain: Stopped RNG: High Output OVP EN Falling Edge LATCHED FAULT Powertrain: Stopped RNG: High Figure 4 — State diagram VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 7 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 6.0 TIMING DIAGRAMS Module inputs are shown in blue; Module outputs are shown in brown; Timing diagram assumes resistive load, adjusted as shown in the diagram, except in the case of output OVP. 1 Input Power On & UV Turn-on 2 3 10% Full Load Load Applied Applied 6 Range Change LO to HI 4 5 EN EN Forced High Low 7 8 Input Input OV OV Turn-off Turn-on VIN-OVLO+ 9 Range Change HI to LO 10 Load Dump 11 12 Load Input Power Step Off & UV Turn-off VIN-OVLOVIN-CR- VIN-CR+ VIN-UVLO+ VIN-RMS Input VIN-UVLO- ≈30VRMS EN VOUT-NL VOUT tEN-DIS tCR tON tCR tPOVP tON tON VOUT tSS tSS Output tUVLO tTRANS (2 places) ILOAD 13 Input Power ON & UV Turn-on 14 Output OC Fault 15 Output OC Recovery 16 Output OVP Fault 17 Toggle EN (Output OVP Recovery) 18 Output OVP Fault )) 19 Recycle Input Power (Output OVP Recovery) 21 Output SC Recovery 22 23 24 OT Fault Line Input & Drop-Out Power Recovery Off & UV Turn-off )) VIN-UVLO+ Input 20 Output SC Fault VIN-UVLO+ VIN-UVLO- VIN-RMS )) )) )) )) )) )) EN tOC VOUT tON tOC VOUT-OVLO+ tON tON tOC tOFF+tON )) )) tSS Output tOFF+tON tOFF+tON tSOVP tSC tOFF+tON ≥tOFF+tON ILOAD )) * )) * Figure 5 — Timing diagram - * Negative current is externally forced and shown for the purpose of OVP protection scenario. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 8 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 7.0 APPLICATION CHARACTERISTICS The following figures present typical performance at TC = 25ºC, unless otherwise noted. See associated figures for general trend data. No Load Power Dissipation vs. Line, Module Enabled - Nominal VOUT 3 No Load Power Dissipation vs. Line, Module Disabled, PC = Low Power Dissipation (W) Power Dissipation (W) 3.0 2.5 2 1.5 1 0.5 2.5 2.0 1.5 1.0 0.5 0 85 100 115 130 145 160 175 190 205 220 235 250 265 Input Voltage (VRMS) TCASE: 100°C 25°C 0.0 85 100 115 130 145 160 175 190 205 220 235 250 265 Input Voltage (V) -40°C Figure 6 – Typical no load power dissipation vs. VIN , module enabled. Figure 7 – No load power dissipation trend vs. VIN , module disabled. Figure 8 – Typical switching frequency output voltage ripple waveform, TCASE = 30ºC, VIN = 230 V, IOUT = 6.9 A, no external ceramic capacitance. Figure 9 – Typical line frequency output voltage ripple waveform, TCASE = 30ºC, VIN = 230 V, IOUT = 6.9 A, COUT = 6,800 µF. Measured at C3, Fig 29. Figure 10 – Typical output voltage transient response, TCASE = 30ºC, VIN = 230 V, IOUT = 1.0 A to 6.7 A, COUT = 6,800 µF. Figure 11 – Typical startup waveform, application of VIN , RLOAD = 7.1 Ω, COUT = 6,800 µF. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 9 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 7.0 APPLICATION CHARACTERISTICS (CONTINUED) The following figures present typical performance at TC = 25ºC, unless otherwise noted. See associated figures for general trend data. Figure 12 – Typical startup waveform, EN pin release, VIN = 240 V, RLOAD = 7.1 Ω, COUT = 6,800 µF. Figure 13 – Line drop out, 50 Hz, 0° phase, VIN = 230 V, ILOAD = 6.8A, COUT = 6,800 µF. Figure 14 – Line drop out, 50 Hz, 90° phase, VIN = 230 V, ILOAD = 6.8A, COUT = 6,800 µF. Figure 15 – Typical conducted emissions, full load, 3x0.47uF X caps +IN to -IN, no CM filter. COUT = 6,800 µF, -Out grounded. Input Current Harmonics 800 Current [mA] 700 600 500 400 300 200 100 0 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 230 V, 50 Hz 1/3x EN61000-3-2, Class A EN61000-3-2, Class D Figure 16 – Typical line current waveform, VIN = 120 V, PLOAD = 330 W. Figure 17 – Typical input current harmonics, full load vs. VIN. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 10 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 7.0 APPLICATION CHARACTERISTICS (CONTINUED) The following figures present typical performance at TC = 25ºC, unless otherwise noted. See associated figures for general trend data. 0.96 Efficiency (%) 0.92 0.90 0.88 0.86 0.84 0.82 40 94 36 92 32 90 28 88 24 86 20 84 16 82 12 80 8 78 4 76 0 0 0.80 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 0.5 1 6.5 7 100 V, 60 Hz VIN: 120 V, 60 Hz 240 V, 50 Hz 3.5 4 4.5 5 5.5 6 6.5 7 100 V Power Diss 240 V Eff 115 V Eff 100 V Eff 115 V Power Diss 240 V Power Diss Figure 19 – VIN to VOUT efficiency and power dissipation vs. VIN and IOUT, TCASE = -40ºC. Figure 18 – Typical power factor vs. VIN and IOUT. Efficiency & Power Dissipation TCASE = 25°C Efficiency & Power Dissipation TCASE = 100°C 40 96 40 94 36 94 36 92 32 92 32 90 28 90 28 88 24 88 24 86 20 86 20 84 16 84 16 82 12 82 12 80 8 80 8 78 4 78 4 76 0 76 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Efficiency (%) 96 Power Dissipation (W) Efficiency (%) 2.5 3 Load Current (A) Load Current (A) VIN: 1.5 2 6.5 7 0 0 0.5 1 1.5 2 Load Current (A) VIN: 100 V Eff 100 V Power Diss 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 Load Current (A) VIN: 240 V Eff 115 V Eff 115 V Power Diss 100 80 60 40 20 240 V Power Diss Effective internal input (CIN_INT) capacitance vs. applied voltage 3.0 Effective capacitance (μF) 120 240 V Eff 115 V Eff 115 V Power Diss Figure 21 – VIN to VOUT efficiency and power dissipation vs. VIN and IOUT , TCASE = 100ºC. Powertrain Equivalent Input Resistance (rEQ_IN) vs. Input Voltage 140 100 V Eff 100 V Power Diss 240 V Power Diss Figure 20 – VIN to VOUT efficiency and power dissipation vs. VIN and IOUT , TCASE = 25ºC. Input Resistance (Ω) Power Dissipation (W) Power Factor 0.94 96 Power Dissipation (W) Efficiency & Power Dissipation TCASE = -40°C Power Factor vs. Load and VIN TCASE = 25°C 0.98 2.5 2.0 1.5 1.0 0.5 0.0 0 85 100 115 130 145 160 175 190 205 220 235 250 265 85 100 115 130 145 160 175 190 205 220 235 250 265 Input Voltage (V) Input Voltage ( VRMS ) Parallel Mode (Low) Series Mode (High) Figure 22 – Dynamic input resistance vs. VIN , IOUT = 6.9 A. Figure 23 – Effective input capacitance vs. VIN. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 11 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 8.0 GENERAL CHARACTERISTICS Specifications apply over all line and load conditions, TC = 25°C, unless otherwise noted. 8.0 General Characteristics ATTRIBUTE MECHANICAL Length Width Height Volume Weight Pin material Underplate SYMBOL MIN L W H Vol W Any operating condition TC TYP MAX 48.6 / [1.91] 48.7 / [1.92] 9.50 / [0.37] 22.5 / [1.37] 57.5 / [2.03] C10200 copper, full hard Nickel Pure matte tin, whisker resistant chemistry Pin finish THERMAL Operating baseplate (case) temperature Thermal resistance, baseplate to sink, flat greased surface Thermal resistance, baseplate to sink, thermal pad (36964) Thermal capacity Thermal design CONDITIONS / NOTES C Grade T Grade UNIT mm / [in] mm / [in] mm / [in] cm3 / [in3] g / [oz] 100 150 200 300 -20 -40 100 µin °C 0.22 °C / W 0.19 °C / W 44.5 Ws / °C See Section 10.9 ASSEMBLY ESDHBM ESD rating ESDMM ESDCDM Human Body Model, “JEDEC JESD 22-A114C.01” Machine Model, “JEDEC JESD 22-A115B” Charged Device Model, “JEDEC JESD 22-C101D” 1000 N/A V 400 SOLDERING See application note Soldering Methods and Procedure for Vicor Power Modules » SAFETY & RELIABILITY MTBF Agency approvals / standards Telecordia Issue 2 Method I Case 1; Ground Benign, Controlled MIL-HDBK-217 Plus Parts Count - 25°C ground Benign, Stationary cTUVus, UL /cUL, EN, IEC 60950-1 CE, Low Voltage Directive; 2006/95/EC 2.51 MHrs 4.93 MHrs CE Marked for Low Voltage Directive and RoHS Recast Directive, as applicable EMI/EMC COMPLIANCE Harmonics EN61000-3-2: 2009, Harmonic Current Emisions – Class A VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 12 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 9.0 PRODUCT OUTLINE DRAWING AND RECOMMENDED PCB FOOTPRINT 9.1 Module Outline Figure 24 — Product outline drawing; Product outline drawings are available in .pdf and .dxf formats. 3D mechanical models are available in .pdf and .step formats. See http://www.vicorpower.com/pfm for more details. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 13 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 9.0 PRODUCT OUTLINE DRAWING AND RECOMMENDED PCB FOOTPRINT (CONT.) 9.2 PCB Mounting Specifications Figure 25 — Recommended PCB pattern; Product outline drawings are available in .pdf and .dxf formats. 3D mechanical models are available in .pdf and .step formats. See http://www.vicorpower.com/pfm for more details. VI BRICK® PFM™ Rev 1.7 vicorpower.com Page 14 of 20 11/2015 800 927.9474 End of Life PF175B480C033FP-00 10.0 PRODUCT DETAILS AND DESIGN GUIDELINES 10.1 Building Blocks and System Designs Full Wave Rectifier EMI/TVS Filter Approximately 48 Vdc +IN +OUT DC/DC Converter -OUT -IN LOAD PFM™ +OUT Converter -OUT 85 V – 264 Vac (Optional) Figure 26 – 300 W Universal AC to DC Supply The VI BRICK® PFM Isolated AC-DC Converter with PFC is a high efficiency AC-to-DC converter, operating from a rectified universal AC input to generate an isolated SELV 48 VDC output bus with power factor correction. It is a component of an AC to DC power supply system such as the one shown in Figure 26 above. The input to the PFM converter is a rectified, sinusoidal AC source with a power factor maintained by the converter with harmonics conforming to IEC 61000-3-2. Upstream filtering enables compliance with the standards relevant to the application (Surge, EMI, etc.). The PFM converter uses secondary-side energy storage (at the SELV 48 V bus) and optional PRM™ regulators to maintain output hold up through line dropouts and brownouts. Downstream regulators also provide tighter voltage regulation, if required. The PF175B480C033FP-00 is designed for standalone operation; however, it may be part of a system that is paralleled by downstream DC/DC converters. Please contact Vicor Sales or refer to our website, www.vicorpower.com, for higher power applications. 10.2 Power Factor Correction The converter provides power factor correction over worldwide AC mains. Power factor correction is disabled in low power mode to improve efficiency. It is disabled in transient mode to allow quicker recovery upon input transients. Load transients that approach the line frequency should be filtered or avoided as these may reduce PFC. 10.3 Small Signal Characteristics Figure 28 shows the small signal model of the converter. Because of its internal feedback loop and PFC modulation, within its regulation bandwidth (dynamic response shown in figure 10) the converter’s output can be effectively modeled with two sources in series and a passive filter: • A constant, 49 Vdc voltage generator. • A dependent voltage source, VRIPPLE, which outputs a variable amplitude sinewave at a frequency twice the input line. • A first order filter, ROUT COUT_INT. + + VIN 49V CIN_INT rEQ_IN + ROUT COUT_INT + RCOUT VOUT RLOAD Vripple - - COUT_EXT - Figure 28 – PF175B480C033FP-00 AC small signal model 10.1.1 Traditional PFC Topology Full Wave Rectifier 10.1.2 Adaptive Cell™ Topology With its single stage Adaptive Cell™ topology, the PFM converter enables consistently high efficiency conversion from worldwide AC mains to a 48 V bus and efficient secondaryside power distribution. EMI/TVS Filter Isolated DC / DC 48 V Bus Converter Figure 27 – Traditional PFC AC to DC supply To cope with input voltages across worldwide AC mains (85-264 Vac), traditional AC-DC power supplies (Figure 27) use 2 power conversion stages: 1) a PFC boost stage to step up from a rectified input as low as 85 Vac to ~380 Vdc; and 2) a DC-DC down converter from 380 Vdc to a 48 V bus. The efficiency of the boost stage and of traditional power supplies is significantly compromised operating from worldwide AC lines as low as 85 Vac. Output voltage stability is guaranteed as long as hold up capacitance COUT and load fall within the specified ranges. Input line stability needs to be verified at system design level. Magnitude of the dynamic input impedance rEQ_IN is provided in Figure 22. The input line impedance can be modeled as a series RLINELLINE circuit. Ceramic decoupling capacitors will not significantly damp the network because of their low ESR; therefore in order to guarantee stability the following conditions must be verified: RLINE > LLINE (CIN_INT + CIN_EXT ) • rEQ_IN RLINE
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