EVBUM2342/D Implementing All‐in‐One PC Power Supply Evaluation Board User's Manual PC Power Supply with the NCP1399, NCP1602, NCP4305, NCP4810 and NCP431 www.onsemi.com EVAL BOARD USER’S MANUAL Table 1. GENERAL PARAMETERS Devices Applications Input Voltage Output Power Topology Board Size NCP1399 NCP1602 NCP4305 NCP4810 NCP431 AOI, Server Power 85 – 260 VAC 240 W CRM PFC & LLC 194 × 108 × 27 mm 7.11 W/inch3 Output Voltage VOUT Ripple Efficiency Operating Temperature Cooling Standby Power 12 V/20 A (22 A Curr. Limit) < 150 mV 2 to 20 A Load Steps Above 89% @ ILOAD > 8 A Convection Open Frame, Forced in Frame < 135 mW 0–40°C Key Features Description This evaluation board user’s manual provides basic information about a high efficiency, low no-load power consumption reference design that was tailored to power All-in-One PC or similar type of equipment that accepts 12 VDC on the input. The power supply implements PFC front stage to assure unity power factor and low THD, current mode LLC power stage to enhance transient response and secondary side synchronous rectification to maximize efficiency. This design note focuses mainly on the NCP1399 current mode LLC controller description – please refer to NCP1602 and NCP4305 materials to gain more information about these devices. The NCP1399 is a current mode LLC controller which means that the operating frequency of an LLC converter is not controlled via voltage (or current) controlled oscillator but is directly derived from the resonant capacitor voltage signal and actual feedback level. This control technique brings several benefits compare to traditional voltage mode controllers like improved line and load transient response and inherent out of zero voltage switching protection. The LLC controller also features built-in high voltage startup and PFC operation control pins that ease implementation of a power supply with PFC front stage and no standby power supply on board. The enhanced light lad operation scheme of the LLC controller allows SMPS design to fulfill the latest no-load and light load consumption limits and still keep output voltage regulated with excellent transient response from no-load to full-load steps. © Semiconductor Components Industries, LLC, 2015 December, 2015 − Rev. 1 1 • • • • • • • • • • • • • • • • Wide Input Voltage Range High Efficiency Low No-load Power Consumption No Auxiliary SMPS Fast Startup X2 Capacitor Discharge Function Near Unity Power Factor Low Mains Protection Overload Protection Secondary Short Circuit Protected Thermal Protection Regulated Output Under any Conditions Excellent Load and Line Transient Response All Magnetics Available as Standard Parts Small Form Factor Capability to Implement Off-mode for Extremely Low No-load Power Consumption Publication Order Number: EVBUM2342/D EVBUM2342/D Detail Demo-board Schematic Description Figure 1. AOI Demo-board Schematic (Assembled Options on Standard Revision of the Demo, Refer to Figures 3 and 4 for Schematic Showing All Possible Options) − Primary Side www.onsemi.com 2 EVBUM2342/D Figure 2. AOI Demo-board Schematic (Assembled Options on Standard Revision of the Demo, Refer to Figures 3 and 4 for Schematic Showing All Possible Options) − Secondary Side www.onsemi.com 3 EVBUM2342/D Figure 3. AOI Demo-board Schematic (Assembled and also All Other Possible Options in PCB Layout) − Primary Side www.onsemi.com 4 EVBUM2342/D Figure 4. AOI Demo-board Schematic (Assembled and also All Other Possible Options in PCB Layout) − Secondary Side www.onsemi.com 5 EVBUM2342/D The input EMI filter is formed by components L15, L12, L13, C47, C33 Cy1, Cy2 and R48 – refer to Figure 1. The inrush current limiting resistor R91 is replaced by strap in this demo revision – one can replace it by appropriate NTC inrush current limiter if needed. The IC1 (NCP4810) with safety resistors R53, R1, R16, R43 is used to assure lose-less X2 capacitor discharge function after application is disconnected from the mains. The PFC power stage uses standard boost PFC topology formed by power components B1, C15, L2, D4, D5, Q4, R38, and bulk capacitors C16, C38, C55. The PFC controller IC8 (NCP1602) senses input voltage indirectly – via PFC power MOSFET drain voltage sensing network R135, R134, R102 and R101. The PFC coil current is sensed by the shunt resistor R38. The series resistor R80 defines maximum PFC front stage peak current. The PFC feedback divider is shared with LLC brown-out sensing network in order to reduce application no-load power consumption. The PFC FB/LLC BO divider is formed by resistors R17, R28, R34, R46, R129, R132, R130 and R133. The FB signal is filtered by capacitor C26 to overcome possible troubles caused by the parasitic capacitive coupling between pin and other nodes that handle high dV/dt signals. The internal bulk voltage regulator compensation C40, C36 and R75 is connected to the IC8 pin 1. The PFC MOSFET is driven via circuitry R25, D7, R26, R33 and Q7. This solution allows to select needed turn-on and turn-off process speed for Q4 and also to handle gate discharge current in local loop – minimizing EMI caused by the driver loop. The PFC coil auxiliary winding provides bias for PFC and also LLC controllers during startup phase. Charge pump R72, C35, D14 and D20 is implemented for this purpose. The LLC power stage primary side composes from these devices: MOSFETs Q3, Q5, external resonant coil L3, transformer TR1 and resonant capacitors C7, C18. The IC3 (NCP1399AA) LLC controller senses primary current indirectly – via resonant capacitor voltage monitoring which is divided down by capacitive divider C17, C29, C32 and C62. The capacitive divider has to provide minimum phase shift between resonant capacitor signal and divided signal on the LLC_CS pin. The capacitive divide has to be loaded in the same time to assure fast LLC_CS pin signal stabilization after application startup – this is achieved by resistor R148. The series resistor R64 is used to limit maximum current that can flow into the LLC_CS pin. The FB optoucoupler OK1 is connected to the LLC_FB pin and defines converter output voltage by pulling down this pin when lower output power is needed. Capacitor C50 forms high frequency pole in FB loop characteristics and helps to eliminate eventual noise that could be coupled to the FB pin by parasitic coupling paths. The Brow-out resistor sensing network was already described in PFC section as it is shared with PFC feedback sensing. The Skip/REM pin of the NCP1399 is used for skip threshold adjustment. Resistors R103 and R104 are used for this purpose together with noise filtering capacitor C57. The over-voltage and over-temperature protections are implemented via OVP/OTP pin by using resistors R126 and R67, temperature dependent resistor NTC1, zener diode D21, filtering capacitor C44 and optocoupler OK3. The OVP comparator is located on the secondary side to assure maximum OVP circuitry accuracy. The PFC ON/OFF function is not used in this revision of demo-board – i.e. the bulk voltage is regulated to nominal level during entire board operation (full, medium, light or no-load conditions) thus the P_ON/OFF pin is connected to ground via resistor R105. The PFC_MODE pin provides bias to the PFC controller via series resistor R100 after high enough voltage is available on the LLC VCC capacitors C37. The VCC decoupling capacitor C54 and also bootstrap capacitor for high side driver powering C53 are located as close to the LLC controller package as possible to minimize parasitic inductive coupling to other IC adjust components due to high driver current peaks that are present in the circuit during drivers rising and falling edges transitions. The bootstrap capacitor is charged via HV bootstrap diode D23 and series resistor R96 which limits charging current and Vboot to HB power supply slope during initial C53 charging process. The gate driver currents are reducer by added series resistors R54, R55 to optimize EMI signature of the application. The primary controllers bias voltage limiter circuitry is used in order to restrict upper value of the primary VCC voltage to approximately 13 V. The VCC limiter composes of these components: resistors R4, R150, capacitors C2, C3, diodes D3, D2, D26 and transistor Q6. The secondary side synchronous rectification uses IC4 and IC5 SR controllers – NCP4305. Two MOSFTEs are connected in parallel for each SR channel to achieve low total drop − Q2, Q9 and Q20, Q21. RC snubber circuits C4, R8, R9 and C25, R40, R41 are used to damp down the parasitic ringing and thus limit the maximum peak voltage on the SR MOSFETs. The SR controllers are supplied from converter output via resistors R10 and R32. These resistors form RC filter with decoupling capacitors C5, C6 and C19, C20. The minimum on-time – R11, R39 and minimum off-time – R7, R37 resistors define needed blanking periods that help to overcome SR controllers false triggering to ringing in the SR power stage. The light load detection circuit (LLD) is formed by resistors R109, R110 capacitor C59 and diodes D24, D25. The SR controllers are disabled by LLD circuitry when application enters skip mode – this helps to reduce no-load power consumption of application. The trigger/disable function of NCP4305 is not used in this application thus the corresponding pins are grounded. The output filtering capacitor bank composes from low ESR capacitors C8 to C11 and C21 to C24. Output filter L4, C12 is used to clean out output voltage from switching glitches. The output voltage of the converter is regulated by standard shunt regulator NCP431− IC6. The regulation optocoupler OK1 is driven via resistor R85 which defines loop gain. The NCP431 is biased via resistor R88 in case the there is no current flowing via regulation optocoupler – www.onsemi.com 6 EVBUM2342/D Circuit Layout which can happen before the nominal VOUT level is reached or during transients from no-load to full-load conditions. The output voltage is adjusted by divider R89 and R98, R99. The feedback loop compensation network is formed partially by resistor R95 and capacitor C51. The secondary side OVP sense circuitry is also using NCP431 reference (IC7) to achieve precise OVP trip point. The OVP threshold is adjusted by resistor divider R76, R77 and R79. The bias current of OVP optoucoupler OK3 is limited by resistor R84 and IC7 is biased via resistor R82. Capacitor C30 slows down OVP reaction speed and helps overcome false triggering by noise. There are several options prepared in the PCB layout so that customer can modify demo-board according to his target application needs – please refer to Figure 4 for schematic that shows all options included in the PCB. Mentioned options for instance allow implementation of off-mode control from secondary side to further reduce no-load power consumption or different PFC front stage controller implementation. The PCB consists of a 2 layer FR4 board with 75 mm copper cladding to minimize parasitic resistance in secondary side where high currents are conducted. Leaded components are assembled form the top side of the board and all SMT components are place from the bottom only so that wave soldering process can be used for production. The board was design to work as open frame with natural air flow cooling. The LLC transformer temperature reaches approximately 90°C for Tambient = 25°C and full load. Forced air flow cooling management should be considered in case the board is packed into some box or target application. Figure 5. Top Layer Figure 6. Bottom Layer www.onsemi.com 7 EVBUM2342/D Figure 7. Top Side Components Figure 8. Bottom Side Components www.onsemi.com 8 EVBUM2342/D Figure 9. Board Photo − Top Side Figure 10. Board Photo − Bottom Side www.onsemi.com 9 EVBUM2342/D Caption: CH1 − HB CH4 − IPRIMARY Caption: CH1 − HB Figure 11. Steady Stage – ILOAD = 1 A Caption: CH1 − HB CH4 − IPRIMARY Figure 12. Steady Stage – ILOAD = 10 A CH4 − IPRIMARY Caption: CH1 − HB, CH2 − CS Pin, CH3 − VOUT, CH4 − IPRIMARY Figure 13. Steady Stage – ILOAD = 20 A Figure 14. Secondary Short Transition Caption: CH2 − IOUT, CH3 − VOUT, CH4 − IPRIMARY Caption: CH2 − IOUT, CH3 − VOUT, CH4 − IPRIMARY Figure 15. Transition Response − Load Step from 2 to 20 A Figure 16. Transition Response − Load Step from 20 to 2 A www.onsemi.com 10 EVBUM2342/D 95 90 Efficiency, h (%) 85 80 75 70 65 60 Efficiency vs. Output Load VIN = 230 VAC 55 Efficiency vs. Output Load VIN = 110 VAC 50 0 2 4 6 8 10 12 14 16 18 20 Output Current, IOUT (A) Figure 17. Board Efficiency – Including PFC Stage 98 96 94 Efficiency, h (%) 92 90 88 86 84 82 80 78 76 0 5 10 15 20 Output Current, IOUT (A) Figure 18. Board Power Stage with SR Efficiency VIN = 385 VDC Table 2. NO-LOAD INPUT POWER CONSUMPTION Input Voltage Power Consumption 110 VAC 105 mW 230 VAC 129 mW www.onsemi.com 11 EVBUM2342/D Table 3. BILL OF MATERIALS Manufacturer Part Number Substitution Allowed Vishay Semiconductor KBU8M−E4/51 Yes 0805 − − Yes 20% Through Hole PANASONIC EEU−FC1E221 Yes − Through Hole − − Yes 1 mF/275 VAC 10% Through Hole Würth Elektronik MXXP225105K310ASPB 46000 Yes Electrolytic Capacitor 100 mF/450 V 20% Through Hole Rubycon 450BXW100MEFC18X30 Yes Parts Qty Description Value Tolerance Footprint Manufacturer B1 1 Bridge Rectifier KBU8M − KBU8M C1, C13, C27, C28, C39, C43, C45, C46, C48, C49, C52, C56, C58, C63, C65, C106, C107, C108, C109, C110, C111 21 Ceramic Capacitor NU − C12 1 Electrolytic Capacitor 220 mF/25 V C14 1 Electrolytic Capacitor NU C15, C33, C47 3 MKP Capacitor C16, C38, C55 3 C17, C29 2 Ceramic Capacitor 220 pF/1 kV 20% Through Hole Vishay S221M39SL0N63K7R Yes C2, C30, C32, C34, C57 5 Ceramic Capacitor 10 nF 10% 0805 Kemet C0805C103K5RACTU Yes C26 1 Ceramic Capacitor 2.2 nF 10% 0805 Kemet C0805C222K5RACTU Yes C3 1 Electrolytic Capacitor 220 mF/35 V 20% Through Hole PANASONIC EEU−FM1V221L Yes C31 1 Ceramic Capacitor 2.2 mF 10% 1206 Kemet C1206C222K5RACTU Yes C35 1 Ceramic Capacitor 6.8 nF 10% 0805 Kemet C0805C682K5RACTU Yes C36 1 Ceramic Capacitor 1 mF 10% 0805 Kemet C0805C105K5RACTU Yes C37 1 Electrolytic Capacitor 22 mF/35 V 20% Through Hole PANASONIC P15814CT−ND Yes C4, C25 2 Ceramic Capacitor 3.9 nF 10% 1206 Kemet C1206C392K5RACTU Yes C42 1 Electrolytic Capacitor NU − Through Hole − − Yes C44 1 Ceramic Capacitor 100 pF 10% 0805 Kemet C0805C101K5RACTU Yes C5, C19, C40, C41, C53, C54 6 Ceramic Capacitor 100 nF 10% 0805 Kemet C0805C104K5RACTU Yes C50 1 Ceramic Capacitor 470 pF 10% 0805 Kemet C0805C471K5RACTU Yes C51 1 Ceramic Capacitor 2.7 nF 10% 0805 Kemet C0805C272K5RACTU Yes C59 1 Ceramic Capacitor 22 nF 10% 0805 Kemet C0805C223K5RACTU Yes C6, C20, 2 Ceramic Capacitor 1 mF 10% 1206 Kemet C1206C105K5RACTU Yes C60, C61 2 Ceramic Capacitor NU − 1206 − − Yes C62 1 Ceramic Capacitor 1 nF 10% 0805 Kemet C0805C102K5RACTU Yes C7, C18 2 Metal Film Capacitor 15 nF/2 kVDC 5% Through Hole Vishay BFC238560153 No C8, C9, C10, C11, C21, C22, C23, C24 8 Electrolytic Capacitor 1,000 mF/16 V 20% Through Hole PANASONIC P15332CT−ND Yes CY1, CY2, CY3 3 Ceramic Capacitor 2.2 nF/Y1/X1 20% Through Hole Murata DE1E3KX222MA5BA01 Yes D1, D8 2 Power rectifier Diode MRA4007T3G − SMA ON Semiconductor MRA4007T3G No D10, D11, D12, D13, D15, D16, D105, D112 8 Diode NU − SOD−123 − − Yes D17 1 Zener Diode 20 V 5% SOD−123 ON Semiconductor MMSZ20T1G No D18, D19, D20, D27 3 Zener Diode NU − SOD−123 − − Yes D2 1 Zener Diode 15 V 5% SOD−123 ON Semiconductor MMSZ15T1G No D21 1 Zener Diode 4.3 V 5% SOD−123 ON Semiconductor MMSZ4V7T1G No D23 1 Ultrafast Power Rectifier Diode MURA160 − SMA ON Semiconductor MURA160T3G No D26 1 Schottky Diode BAT54T1 − SOD−123 ON Semiconductor BAT54T1G No D3 1 Schottky Diode MBR2H100SFT3G − SOD−123 ON Semiconductor MBR2H100SFT3G No D4 1 Standard Recovery Rectifier Diode 1N5408 − Axial Lead ON Semiconductor 1N5408RLG No D5 1 Soft Recovery Rectifier Diode MSR860 − TO−220 (2 LEAD) ON Semiconductor MSRF860G No D6, D9 2 Diode NU − SMA − − Yes www.onsemi.com 12 EVBUM2342/D Table 3. BILL OF MATERIALS (continued) Parts Qty Description Value Tolerance Footprint Manufacturer Manufacturer Part Number Substitution Allowed D7, D14, D24, D25 4 Switching Diode MMSD4148 − SOD−123 ON Semiconductor MMSD4148T3G No F1 − FUSE 1 Fuse, Medium Delay T−4A − − Bussmann TDC 210−4A Yes F1 − Holder 1 Fuse Holder − − SH22.5A Multicomp MCHTC−15M Yes F1 − Cover 1 Cover, PCB Fuse Holder − − − Multicomp MCHTC−150M Yes HEATSINK_1 1 Heat Sink SK 454 150 SA − SK 454 150 SA Fischer Elektronik SK 454 150 SA Yes HEATSINK_1 1 Heat Sink − − − − − Yes IC1 1 X2 Capacitor Discharger NCP4810 − SOIC−8 ON Semiconductor NCP4810DR2G No IC101 1 Secondary Side Sleep mode Controller NU − SOIC−8 − − No IC102 1 Secondary Side Sleep mode Controller NU − SOIC−8 − − No IC2 1 Power Factor Controller NU − SOIC−8 − − No IC3 1 Resonant Mode Controller NCP1399 − SOIC 16 ON Semiconductor NCP1399AADR2G No IC4, IC5 2 Secondary Side Synchronous Rectifier NCP4305 − SOIC−8 ON Semiconductor NCP4305DDR2G No IC6, IC7 2 Programmable Precision Reference NCP431 − SOT−23 ON Semiconductor NCP431AVSNT1G No IC8 1 Power Factor Controller NCP1602 − TSOP−6 ON Semiconductor NCP1602DCCSNT1G No L2 1 PFC Inductor 260 mH 10% PQ3225 Würth Elektronik 750315036 Yes L12, L13 2 Inductor 100 mH 20% DO5040H Coilcraft DO5040H−104MLB Yes L15 1 Emi Filter 2.9 mH 15% TLBI ICE Components LF−28030−0029−H Yes L3 1 Resonant Inductor 52 mH 10% RM8 Würth Elektronik 750370249 Yes L4 1 Inductor 200 nH 20% L−US20A Bohemia Electric TC−05001510−00 Yes L5, L6 2 Inductor NU − − − − Yes L8 1 Inductor NU − − − − Yes LED1 1 LED 3 mm NU − Through Hole − − Yes NTC1 1 Thermistor 330 kW − Through Hole Vishay NTCLE100E3334JB0 Yes OK1, OK3 2 Opto Coupler 817B − DIP−4 Fairchild FOD817B Yes OK2 1 Opto Coupler NU − DIP−4 − − Yes Q1 1 N-Channel MOSFET NU − SOT−23 − − Yes Q10, Q100 2 PNP Transistror NU − SOT−23 − − Yes Q11 1 PNP Transistror NU − SOT−23 − − Yes Q12 1 NPN Transistor NU − SOT−23 − − Yes Q2, Q9, Q20, Q21 4 N-Channel MOSFET NVMFS5830NL − SO−8FL/ DFN−5 ON Semiconductor NVMFS5830NLT1G No Q3, Q5 2 N-Channel MOSFET STP12NM50FP − TO−220 ST Microelectronics STP12NM50FP Yes Q4 1 N-Channel MOSFET STP20NM60FP − TO−220 ST Microelectronics STP20NM60FP Yes Q6 1 N-Channel MOSFET BSS138 − SOT−23 ON Semiconductor BSS138LT1G No Q7 1 PNP Transistor BC807 − SOT−23 ON Semiconductor BC807−16LT1G No Q8 1 N-Channel MOSFET BSS127 − SOT−23 Diodes Incorporated BSS127S−7 No R1, R16, R43, R53, 4 Resistor SMD 360 kW 1% 1206 Rohm Semiconductor MCR18ERTJ364 Yes R10, R32 2 Resistor SMD 22 W 1% 0805 Rohm Semiconductor MCR10EZPF22R0 Yes R104 1 Resistor SMD 130 kW 1% 0805 Rohm Semiconductor MCR10EZPF1303 Yes R107 1 Resistor trough Hole, High Voltage 4.7 MW 5% 0414 Vishay VR37000004704JA100 Yes R109 1 Resistor SMD 430 W 1% 0805 Rohm Semiconductor MCR10EZPF4300 Yes www.onsemi.com 13 EVBUM2342/D Table 3. BILL OF MATERIALS (continued) Manufacturer Part Number Substitution Allowed Rohm Semiconductor MCR10EZPF3601 Yes 0805 Rohm Semiconductor MCR10EZPF1002 Yes 1% 0805 Rohm Semiconductor MCR10EZPF5101 Yes 220 kW 1% 0805 Rohm Semiconductor MCR10EZPF2203 Yes Resistor SMD 30 kW 1% 0805 Rohm Semiconductor MCR10EZPF3002 Yes 1 Resistor SMD 360 kW 1% 0805 Rohm Semiconductor MCR10EZPF3603 Yes R134 1 Resistor SMD 2.7 MW 5% 1206 Rohm Semiconductor MCR18ERTJ275 Yes R135 1 Resistor SMD 3 MW 5% 1206 Rohm Semiconductor MCR18ERTJ305 Yes R148 1 Resistor SMD 1.5 kW 1% 0805 Rohm Semiconductor MCR10EZPF1501 Yes R150 1 Resistor SMD 2W 5% 0805 Rohm Semiconductor MCR10EZHJ2R0 Yes R17, R28, R34, R46 4 Resistor SMD 1.8 MW 5% 0805 Rohm Semiconductor MCR25JZHJ185 Yes R2, R3, R13, R24, R30, R49, R69, R78, R111, R140, R142, R145, R147 13 Resistor SMD 0W − 0805 Rohm Semiconductor MCR10EZPJ000 Yes R25 1 Resistor SMD 47 W 1% 0805 Rohm Semiconductor MCR10EZPF47R0 Yes R26 1 Resistor SMD 2.2 W 5% 0805 Rohm Semiconductor MCR10EZHJ2R2 Yes R29, R94 2 Resistor SMD NU − 1206 − − Yes R38 1 Power Resistor 0.0 W/3 W 1% Through Hole Vishay/Dale LVR03R0500FR50 Yes R4, R82, R88 3 Resistor SMD 68 kW 1% 0805 Rohm Semiconductor MCR10EZPF6802 Yes R42, R52, R68 3 Resistor SMD 0W − 1206 Rohm Semiconductor MCR18EZHJ000 Yes R44 1 Resistor SMD NU − 2010 − − Yes R48 1 VARISTOR 275 VAC 1% Through Hole Würth Elektronik 820512711 Yes R5, R6, R14, R15, R18, R19, R21, R22, R23, R27, R31, R35, R45, R47, R50, R56, R57, R58, R59, R60, R61, R62, R63, R65, R66, R70, R71, R73, R74, R81, R83, R86, R90, R93, R97, R106, R108, R112, R113, R114, R115, R116, R117, R118, R119, R120, R121, R122, R123, R124, R125, R127, R128, R131, R136, R138, R141, R143, R144, R146, R149, R151 62 Resistor SMD NU − 0805 − − Yes R54, R55, R100 3 Resistor SMD 10 W 1% 0805 Rohm Semiconductor MCR10EZPF10R0 Yes R64 1 Resistor SMD 100 W 1% 0805 Rohm Semiconductor MCR10EZPF1000 Yes Parts Qty Description Value Tolerance Footprint Manufacturer R11, R39 2 Resistor SMD 3.6 kW 1% 0805 R12, R20, R33, R36, R51 5 Resistor SMD 10 kW 1% R126 1 Resistor SMD 5.1 kW R129 1 Resistor SMD R132 1 R133 www.onsemi.com 14 EVBUM2342/D Table 3. BILL OF MATERIALS (continued) Manufacturer Part Number Substitution Allowed Rohm Semiconductor MCR10EZPF1302 Yes 0805 Rohm Semiconductor MCR10EZPF2202 Yes 1% 0805 Rohm Semiconductor MCR10EZPF3600 Yes 82 kW 1% 0805 Rohm Semiconductor MCR10EZPF8202 Yes Resistor SMD 47 kW 1% 0805 Rohm Semiconductor MCR10EZPF4702 Yes 1 Resistor SMD 12 kW 1% 0805 Rohm Semiconductor MCR10EZPF1202 Yes R8, R9, R40, R41 4 Resistor SMD 27 W 1% 1206 Rohm Semiconductor MCR18ERTJ270 Yes R80 1 Resistor SMD 43 kW 1% 0805 Rohm Semiconductor MCR10EZPF4302 Yes R84, R105 2 Resistor SMD 1 kW 1% 0805 Rohm Semiconductor MCR10EZPF1001 Yes R85 1 Resistor SMD 820 W 1% 0805 Rohm Semiconductor MCR10EZPF8200 Yes R87, R92 2 Resistor SMD 2.7 kW 1% 1206 Rohm Semiconductor MCR18ERTF2701 Yes R89 1 Resistor SMD 39 kW 1% 0805 Rohm Semiconductor MCR10EZPF3902 Yes R91 1 NTC Thermistor 0W 1% strap − − Yes R96 1 Resistor SMD 5.6 W 5% 0805 Rohm Semiconductor MCR10EZHJ5R6 Yes R98, R103 2 Resistor SMD 11 kW 1% 0805 Rohm Semiconductor MCR10EZPF1102 Yes R99, R101, R102 3 Resistor SMD 150 kW 1% 0805 Rohm Semiconductor MCR10EZPF1503 Yes TR1 1 Transformer 750314580 10% PQ3225 Würth Elektronik 750314580 Yes X1 1 Output Terminal Block Pitch 5 mm − 20.700M/2 IMO 20.700M/2 Yes X2 1 Input Terminal Block Pitch 5 mm − KRE 02 LUMBERG KRE 02 Yes Parts Qty Description Value Tolerance Footprint Manufacturer R67 1 Resistor SMD 13 kW 1% 0805 R7, R37, R130 3 Resistor SMD 22 kW 1% R72 1 Resistor SMD 360 W R75, R79 2 Resistor SMD R76, R95, R110 3 R77 NOTE: All parts are Pb-Free. 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