DEMO MANUAL DC2199A-B LTC3765/LTC3766 360W Isolated Forward Converter with Synchronous Rectification DESCRIPTION Demonstration circuit 2199A-B is a 360W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip-set. It produces a regulated 24V, 15A output from an input voltage range of 36V to 60V. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these parts in an active-clamp-reset forward converter power supply, suitable for telecom, industrial, and other applications. It has a 4.7in2 solution footprint area. Synchronous rectification helps to attain an efficiency PERFORMANCE SUMMARY approaching 96%. Secondary-side control eliminates complex opto-coupler feedback, providing fast transient response with minimum output capacitance. For other output requirements, see the LTC3765 and LTC3766 data sheets or contact the LTC sales. Design files for this circuit board are available at http://www.linear.com/demo/DC2199A-B L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25C SYMBOL PARAMETER VIN Input Supply Range VOUT Output Voltage IOUT Output Current Range, Continuous fSW Switching (Clock) Frequency VOUT(P-P) Output Ripple VIN = 48V, IOUT = 30A (20MHz BW) IREG Output Regulation Line and Load (36VIN to 60VIN, 0AOUT to 15AOUT) POUT/PIN CONDITIONS MIN TYP 36 MAX 60 24.0 300LFM Efficiency (See Figure 3) VIN =48V, IOUT = 15A Isolation Basic Approximate Solution Size Component Area x Top Component Height 0 UNITS V V 15 A 200 kHz 60 mVP-P 0.02 96 1500 4.7in2 x 0.6 % % VDC Inches dc2199abf 1 DEMO MANUAL DC2199A-B OPERATING PRINCIPLES The LTC3765 active clamp forward controller and gate driver is used on the primary and provides start-up, gate drive, and protection functions. Once start-up is accomplished, the LTC3766 high efficiency, secondary-side synchronous forward controller takes over, and provides the LTC3765 with timing information and bias power through a small pulse transformer. When input voltage is applied, the LTC3765 commences soft-start of the output voltage. When the output reaches the RUN threshold, the LTC3766 comes alive and takes control by sending encoded PWM gate pulses to the LTC3765 through T2. These pulses also provide primary bias power efficiently over a wide input voltage range. The transition from primary to secondary control occurs at some fraction of the nominal output voltage. From then on, operation and design is reduced to that of a simple buck converter. Secondary control eliminates delays, tames large-signal overshoot, and reduces output capacitance needed to meet transient response requirements. An optional LC filter stage on the input lowers RMS input current. The filter must have output impedance that is less than the converter input impedance to assure stability. This may require a damping impedance, which is provided by R1. (See Linear Technology Application Note 19 for a discussion of input filter stability.) R1 is coupled through a tiny 2mm x 2mm inductor L1, and provides damping with arbitrarily low source impedance. For bench testing, an electrolytic capacitor has been added at the input terminals to provide suitable ripple current capability. The values selected have a filter resonant frequency that is below the converter switching frequency, thus avoiding high circulating currents in the filter. QUICK START PROCEDURE Demonstration circuit 2199A-B is easy to set up to evaluate the performance of the LTC3765/LTC3766. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: b.If efficiency measurements are desired, an ammeter capable of measuring 15ADC or a resistor shunt can be put in series with the input supply in order to measure the DC2199A-B's input current. NOTE: When measuring the output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor as shown in Figure 1. c. A voltmeter with a capability of measuring at least 60V can be placed across the input terminals in order to get an accurate input voltage measurement. 1.Set an input power supply that is capable of 36V to 60V to 36V. Then turn off the supply. 2.Direct an airflow of 300LFM across the unit for sustained operation at full load. 3.With power off, connect the supply to the input terminals +VIN and -VIN. a. Input voltages lower than 36V can keep the converter from turning on due to the undervoltage lockout feature of the LTC3765/LTC3766. 4.Turn on the power at the input. NOTE: Make sure that the input voltage never exceeds 60V. 5.Check for the proper output voltage of 24V. Turn off the power at the input. 6.Once the proper output voltages are established, connect a variable load capable of sinking 15A at 12V to the output terminals +VOUT and -VOUT. Set the current for 0A. a. If efficiency measurements are desired, an ammeter or a resistor shunt that is capable of handling 15ADC can be put in series with the output load in order to measure the DC2199A-A's output current. dc2199abf 2 DEMO MANUAL DC2199A-B QUICK START PROCEDURE b.A voltmeter with a capability of measuring at least 24V can be placed across the output terminals in order to get an accurate output voltage measurement. 7.Turn on the power at the input. 8.Once the proper output voltage is again established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other desired parameters. NOTE. If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 98 18 97 16 96 14 95 12 94 10 93 8 92 36VIN 48VIN 60VIN 48VIN_PD 91 90 1 3 5 7 9 IOUT (A) 11 13 15 6 POWER DISSIPATION (W) EFFICIENCY (%) Figure 1. Proper Measurement Equipment Setup 4 2 dc2199ab F02 Figure 2. Efficiency and Power Dissipation dc2199abf 3 DEMO MANUAL DC2199A-B QUICK START PROCEDURE Figure 3. Output Ripple at 48VIN and 15AOUT (100mV, 2s/DIV, 20MHz) Figure 4. Transient Response Waveform at 48VIN and 7.5A to 15A to 7.5AOUT (5A, 500mV, 500s/DIV) dc2199abf 4 DEMO MANUAL DC2199A-B QUICK START PROCEDURE Figure 5. Thermal Map, Front Side at 48VIN and 15AOUT (TA = 25C, 300LFM) Figure 6. Thermal Map, Back Side at 48VIN and 15AOUT (TA = 25C, 300LFM) dc2199abf 5 DEMO MANUAL DC2199A-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 2 C1, C22 CAP., ALUM., ELECT., 33F, 80V, CAP-10X12.5 PANASONIC, EEHZA1K330P 2 5 C2, C3, C4, C5, C6 CAP., X7R, 4.7F, 100V, 10%, 1210 MURATA, GRM32ER72A475KE14 4 1 C10 CAP., X7R, 2.2nF, 630V, 5%, 1206 MURATA, GRM31A7U2J222JW31 5 1 C11 CAP., X7R, 0.015F, 25V, 10%, 0603 AVX, 06033C153KAT2A 7 2 C24, C71 CAP., X7R, 1.0F, 16V 10%, 0805 MURATA, GRM21BR71C105KA01 4 2 C25, C26 CAP., OSCON, 82F, 35V, 20%, CAP-SVPF-E12 PANASONIC, 35SVPF82M 8 1 C30 CAP., X7R, 2200pF, 250V, 10%, 1812 MURATA, GA343QR7GD222KW01L 8 1 C34 CAP., X5R, 10F, 50V, 20%, 1210 MURATA, GRM32ER61H106MA12 9 1 C51 CAP., C0G, 330pF, 630V, 5%, 1206 MURATA, GRM31A5C2J331JW01 12 4 C55, C73, C80, C119 CAP., X7R, 1nF, 25V, 10%, 0603 MURATA, GRM188R71E102KA01 9 1 C66 CAP., X7R, 0.047F, 200V, X7R, 10%, 1206 MURATA, GRM31CR72D473KW03 11 2 C72, C102 CAP., X7R, 0.1F, 25V, 10%, 0805 AVX, 08053C104KAT2A 14 1 C75 CAP., NPO, 100pF, 25V, 5%, 0603 AVX, 06033A101JAT2A 10 1 C76 CAP., X7R, 3.3nF, 25V, 10%, 0603 AVX, 06033C332KAT2A 15 1 C77 CAP., X7R, 4.7F, 25V, 10%, 1206 AVX, 12063C475KAT2A 16 1 C78 CAP., NPO, 0.033F, 25V, 5%, 0805 TDK, C2012C0G1E333J 17 1 C79 CAP., X7R, 4.7nF, 25V, 10%, 0603 MURATA, GRM188R71E472KA01 18 1 C101 CAP., NPO, 220pF, 25V, 5%, 0603 AVX, 06033A221JAT2A 10 1 C103 CAP., NPO, 470pF, 25V, 5%, 0603 AVX, 06033A471JAT2A 19 1 C106 CAP., COG, 150pF, 250V, 5%, 0603 TDK, C1608C0G2E151J080AA 20 1 C112 CAP., X7R, 0.22F, 250V, 10%, 1206/1210 TDK C3225X7R2E224K 21 1 C113 CAP., X7R, 0.033F, 25V, 10%, 0603 AVX, 06033C333KAT2A 11 1 C116 CAP., X7R, 4.7F, 25V, 10%, 1206 AVX, 12063C475KAT2A 22 1 C118 CAP., NPO, 1500pF, 5%, 0603 AVX, 06033A152JAT2A 23 2 D1, D34 DIODE ULTRA FAST 1A 200V SMP VISHAY, ES1PD-M3 / 84A 25 3 D29, D30 DIODE SCHOTTKY 60V 0.5A, SOT23 DIODES INC, ZHCS506TA 27 1 D40 DIODE, 1N4148WS, SOD323 VISHAY, 1N4148WS-E3-08 14 2 D37, D38 DIODE, BAS21, SOT23 DIODES INC., BAS21 15 1 L3 INDUCTOR, 6.8H, 10% COILCRAFT, SER2915L-682KL 16 1 L4 INDUCTOR, 680H, DO1606T COILTRONICS SD25-681 19 4 Q12, Q13, Q14, Q15 MOSFET, N-CH, 120V, POWERPAK-SO-8 FAIRCHILD FDMS86201 35 1 L1 INDUCTOR, 1.0H, 20% COILCRAFT, XPL2010-102ML 36 1 L2 INDUCTOR, 2.0H, 20% VISHAY, IHLP4040DZER2R0M11 40 2 Q8, Q9 MOSFET, N-CH 150V, POWERPAK-SO-8 INFINEON, BSC190N15NS3 G 42 1 Q27 TRANS., NPN, 40V, 1A, SOT-89 DIODE INC., FCX491ATA 43 1 Q28 MOSFET, N-CH, SUPER, SOT-6 FAIRCHILD, FDC2512-NL 44 1 Q29 MOSFET, P-CH, IRF6217, POWERPAK-SO-8 IR, IRF6217TRPBF 45 1 R1 RES., CHIP, 0.33, 1/4W, 5%, 2512 PANASONIC, ERJ-1TRQJR33U 47 1 R4 RES., CHIP, 8.2k, 1W, 5%, 2512 PANASONIC, ERJ-1TYJ822U 51 1 R18 RES., 102k, 1/8W, 1%, 0805 VISHAY, CRCW0805102KFKEA 52 1 R22 RES., 3.74k, 1/16W, 1%, 0603 VISHAY, CRCW06033K74FKEA dc2199abf 6 DEMO MANUAL DC2199A-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 27 2 R23, R24 RES., CHIP, 20, 1/4W, 5%, 1206 VISHAY, CRCW120620R0JKEA 54 1 R29 RES., CHIP, 100k, 1/8W, 5%, 0805 VISHAY, CRCW0805100KJNEA 28 1 R41 RES., CHIP, 23.7k, 1/16W, 1%, 0603 VISHAY, CRCW060323K7FKEA 55 1 R42 RES., CHIP, 1k, 1/16W, 1%, 0603 VISHAY, CRCW06031K00FKEA 56 1 R46 RES., CHIP, 604, 1/16W, 1%, 0603 VISHAY, CRCW0603604RFKEA 57 1 R53 RES., CHIP, 6.8, 1/2W, 1%, 1206 PANASONIC, ERJ-8RQF6R8V 58 1 R68 RES., CHIP, 2.15k, 1/16W, 1%, 0603 VISHAY, CRCW06032K15FKEA 59 1 R69 RES., CHIP, 46.4k, 1/16W, 1%, 0603 VISHAY, CRCW060346K4FKEA 29 1 R75 RES., CHIP, 2.87k, 1/8W, 1%, 0805 VISHAY, CRCW08052K87FKEA 60 4 R101, R148, R149, R151 RES., CHIP, 100, 1/16W, 1%, 0603 VISHAY, CRCW0603100RFKEA 32 1 R102 RES., CHIP, 0.003, 3W, 1%, 1225 SUSUMU, KRL6432D-M-R003-F-T5 33 2 R106, R107 RES., CHIP, 100, 1/16W, 1%, 0603 VISHAY, CRCW0603100RFKEA 34 1 R108 RES., CHIP, 5.62k, 1/4W, 1%, 1206 VISHAY, CRCW12065K62FKEA 61 1 R109 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA 62 1 R110 RES., CHIP, 1.20, 1/2W, 1%, 1206 SUSUMU, RL1632S-1R20-F 63 1 R114 RES., CHIP, 28.7k, 1/16W, 1%, 0603 VISHAY, CRCW060328K7FKEA 35 1 R115 RES., CHIP, 4.42k, 1/4W, 1%, 1206 VISHAY, CRCW12064K42FKEA 64 1 R117 RES., CHIP, 12.7k, 1/16W, 1%, 0603 VISHAY, CRCW060312K7FKEA 65 1 R118 RES., CHIP, 681k, 1/16W, 1%, 0603 VISHAY, CRCW0603681KFKEA 66 1 R121 RES., CHIP, 133k, 1/16W, 1%, 0603 VISHAY, CRCW0603133KFKEA 36 1 R123 RES., CHIP, 86.6k, 1/16W, 1%, 0603 VISHAY, CRCW060386K6FKEA 67 1 R125 RES., CHIP, 17.4k, 1/16W, 1%, 0603 VISHAY, CRCW060317K4FKEA 37 1 R127 RES., CHIP, 10k, 1/4W, 1%, 1206 VISHAY, CRCW120610K0FKEA 68 1 R136 RES., CHIP, 0.005, 1W, 1%, 1225 SUSUMU, KRL6432D-M-R005-F-T5 69 1 R139 RES., CHIP, 26.7k, 1/16W, 1%, 0603 VISHAY, CRCW060326K7FKEA 70 1 R140 RES., CHIP, 274, 1/8W, 1%, 0805 PANASONIC, ERJ-6ENF2740V 71 1 R150 RES., CHIP, 14.3k, 1/16W, 1%, 0603 VISHAY, CRCW060314K3FKEA 38 1 T1 TRANSFORMER, 4T:4T:2T CHAMPS TECH., LTC-PQ26-0404-S02 73 1 T2 TRANSFORMER, 1.25:1 PULSE, PA3493NL 74 1 U1 I.C. LTC3765EMSE, MSOP-16PIN LINEAR TECH., LTC3765EMSE#PBF 75 1 U2 I.C. LTC3766EGN, SSOP-GN28 LINEAR TECH., LTC3766EGN#PBF Additional Demo Board Circuit Components 2 0 C7, C31, C33, C68 CAP., OPT, 7343 OPT 3 0 C8, C9, C18, C19, C111 CAP., OPT, 0603 OPT 5 0 C12, C13, C14, C16, C20, C70 CAP., OPT, 0603 OPT 6 0 C15 CAP., OPT, 0805 OPT 7 0 C17, C69 CAP., OPT, 1206 OPT 6 0 C21, C114 CAP., OPT, 0805 OPT 3 0 C23 CAP., OPT, CAP-SVPF-E12 OPT 13 2 C74, C105 CAP, 0, JUMPER, 0603 VISHAY, CRCW06030000Z0EA 12 0 D2 DIODE, TBD, SOD323 OPT 24 0 D4, D35 DIODE, OPT, SOD323 OPT dc2199abf 7 DEMO MANUAL DC2199A-B PARTS LIST ITEM QTY 13 0 REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER D27 DIODE OPT, SOT23 OPT 26 0 D28 DIODE, OPT, SOT23 OPT 17 0 Q1 MOSFET, OPT, SOT23-6 OPT 18 0 Q4 MOSFET, OPT, D-PAK OPT 20 0 Q23 MOSFET, OPT, POWERPAK-SO-8 OPT 21 0 Q24 MOSFET, OPT, POWERPAK-SO-8 OPT 37 0 Q2 MOSFET, OPT, SOT23-6 OPT 38 0 Q3 MOSFET, OPT, SOT23 OPT 39 0 Q31 TRANS, OPT, SOT23 OPT 41 0 Q11 MOSFET, OPT, POWERPAK-SO-8 OPT 22 3 R2, R3, R43 RES., CHIP, 0, 0603 VISHAY, CRCW06030000Z0EA 48 0 R5 RES., OPT, 2512/2010 OPT 23 0 R6, R9, R11, R12, R19, R113, R124 RES., OPT, 0603 OPT 49 9 R7, R8, R49, R103, R111, R112 RES., CHIP, 0, 0603 VISHAY, CRCW06030000Z0EA 24 1 R10 RES., CHIP, 0.00, 1225 TEPRO, RN5326 25 0 R13, R14, R15 RES., OPT, 2512 OPT 26 0 R17, R51, R52 RES., OPT, 1206 OPT 46 0 R25, R26, R27, R28, R30, R31, R32, R33, R34, R35, R119, R120, R126, R138, R147 RES., OPT, 0603 OPT R76, R84 RES., OPT, 0805 OPT 50 30 R122, R137, R146 0 31 1 R77 RES., CHIP, 0, 1/8W, 0805 VISHAY, CRCW08050000Z0EA 53 0 R116 RES., OPT, 1206 OPT 72 0 R152 RES., OPT, 0805 OPT 39 0 T3 TRANSFORMER, 1:100, CT02-100 OPT 40 0 U3 I.C. OPT, SO16 OPT Hardware: For Demo Board Only 1 4 E1, E2, E3, E4 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0 2 3 E5, E6, E7 TESTPOINT, TURRET, 0.061" MILL-MAX, 2308-2-00-80-00-00-07-0 3 0 J1 HEADER, OPT, 2X7PIN, 0.079CC OPT, MOLEX, 87331-1420 4 2 J3, J4 STUD, TEST PIN PEM, KFH-032-10 5 4 J3, J4(2 EACH) NUT, BRASS, #10-32 ANY #10-32 6 2 J3, J4 WASHER, STAR #10 BRASS NICKEL ANY, #10EXT BZ TN 7 2 J3, J4 RING, LUG RING #10 KEYSTONE, 8205 8 0 TP1-TP6 PAD-SMD PAD-SMD 9 4 (STAND-OFF) STAND-OFF, NYLON 0.25" KEYSTONE, 8831 (SNAP ON) 10 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 2199A dc2199abf 8 A B C D 3 R29 100K 0805 VIN U1 C118 1.5nF R148 100 R139 26.7K UV LTC3765EMSE 1/4W = 1206, 1W = 2512. RCORE SSFLT RUN VCC R150 14.3K 11 13 12 C3,4,5,6 4x4.7uF 100V 1210 VIN R117 12.7K 5 NOTE: 4.7uF 100V MURATA, GRM32ER72A475KE14 (X7R 1210) 4.7uF 25V AVX, 12063C475KAT2A (X7R 1206) 10uF 50V MURATA, GRM32ER61H106MA12 (1210 X5R) 2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812) 82uF 16V PANASONIC, 35SVPF82M 33uF 80V PANASONIC, EEHZA1K330P (10x12.5mm) L1 Coilcraft XPL2010-102ML L2 Vishay IHLP4040DZER2R0M11 L3 Coilcraft SER2915L-682KL Unless otherwise specified: L4 Coiltronics SD25-681 All resistors are in ohms 0603. 0.005 Ohm Susumu KRL6432D-M-R005-F-T5 (1225) 0.003 Ohm Susumu KRL6432D-M-R003-F-T5 (1225) All capacitors are in microfarads 0603. R110 SUSUMU, RL1632S-1R20-F (1206) All capacitors are 25V. T1 Champs, LTC-PQ26-0404-S02 1/16W = 0402, 1/10W = 0603, 1/8W = 0805, T2 Pulse, PA3493NL PSS VCP Q28 FDC2512 D29 ZHCS506 2512 C113 33nF L2 2.0uH C2 4.7uF 100V 1210 1.0uH C24 1uF 16V 0805 SGNDP C55 1nF -VIN 2x33uF 80V + C1,22 R18 102K 0805 SGNDP R22 3.74K -VIN 36V-60VIN +VIN R1 0.33 4 D30 C106 150pF 250V R53 6.8 1206 R109 10K C102 0.1uF 0805 R101 100 Q29 IRF6217 C101 0.1uF 220pF 0805 4 1T 6 -VOUT C66 47nF 200V 1206 C11 15nF D34 ES1PD ND L4 RS- R140 274 1/8W 0805 3 R108 C73 1nF PT- PT+ 28.7K R114 R118 681K 25 26 C10 2.2nF 630V 1206 D1 ES1PD SGND PGND R23,24 2x20 1206 5.62K 1206 RS+ SGND 0.003 1225 R102 C51 330pF 630V 1206 PGND C116 4.7uF 25V 1206 VAUX +VOUT FG 680uH D38 BAS21 C112 0.22uF 200V 1210 1uF 16V 0805 C71 Q14,15 FDMS86201 PA3493NL T2 R110 1.20 1206 1/2W 3 1 250V 1812 C30 2.2nF 12 13 1.25T -VIN SGNDP PGNDP C72 R136 0.005 1225 6 5 4T 9 10 BAS21 D37 R121 133K COG 0805 C78 33nF FG R75 2.87K 0805 VAUX C34 10uF 50V 1210 2 LTC3766EGN28 R123 86.6K VCC PGND C77 4.7uF 1206 VCC Q27 FCX491A R69 46.4K RS- 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C103 470pF C75 100pF LT SCALE = NONE DAVID B. 6 13 12 __ R127 10K 1206 DATE: N/A SIZE DATE 1 SHEET 1 LTC3765EMSE / LTC3766EGN28 DC2199A-B OF 2 REV. 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 8-18-14 ACTIVE CLAMP FORWARD CONVERTER WITH DIRECT FLUX LIMIT TECHNOLOGY R42 1K C76 3.3nF -VOUT 24VOUT / 15A Friday, December 12, 2014 IC NO. R46 604 R41 23.7K SGND R115 4.42K 1206 +VOUT -VOUT 2x82uF 35V +VOUT DAVID B. +VOUT APPROVED PRODUCTION 2 1 DESCRIPTION REVISION HISTORY REV + C25,26 ECO TITLE: SCHEMATIC C79 4.7nF R68 2.15K FB VS- VS+ R107 100 RS+ R106 100 APPROVALS R125 17.4K LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE U2 R4 8.2K 2512 Q12,13 FDMS86201 L3 6.8uH Simplified Schematic (without Unneeded Components) 100 R151 ZHCS506 4 16 15 SGNDP C119 1nF C80 1nF AG IN- IN+ R149 100 Q8,9 BSC190N15NS3 ND 4T 32 T1 LTCP26-0404-S02 8 2T 14 23 3 28 L1 GND 17 PGND 1 FS/UV 10 GND2 9 14 NDRV 2 PG 8 IS+ DELAY 6 7 ISISMAG 5 20 FGD/SWB RUN 8 3 VSEC SS 9 SW 2 14 REGSD 16 FG GND 1 SG 24 VAUX PHASE 5 IPK 10 4 4 PGND 27 22 VIN 21 NDRV MODE VCC FS/SYNC 15 SGD 19 17 IS- 18 IS+ ITH 7 VSOUT 11 5 A B C D DEMO MANUAL DC2199A-B SCHEMATIC DIAGRAM dc2199abf 9 A B C D 1 D40 SGNDP R22 3.74K 2 33uF 80V + C22 R18 102K 0805 -VIN 33uF 80V + C1 1N4148WS E7 E2 E1 PSS VCP 3 C24 1uF 16V 0805 SGNDP C55 1nF C113 33nF C6 4.7uF 100V 1210 Q28 FDC2512 D29 ZHCS506 C2 4.7uF 100V 1210 L2 2.0uH C4 4.7uF 100V 1210 R29 100K 0805 VIN C5 4.7uF 100V 1210 IS+ D27 OPT U1 0 R49 3 R139 26.7K UV 0 2512 1 5 R9 OPT C118 1.5nF R148 100 R76 OPT 0805 D28 OPT OPT 0805 3 4 R84 2 1 T3 OPT LTC3765EMSE 1/4W = 1206, 1W = 2512. RCORE SSFLT RUN VCC R150 14.3K 11 13 12 3 C3 4.7uF 100V 1210 VIN R117 12.7K NOTE: 4.7uF 100V MURATA, GRM32ER72A475KE14 (X7R 1210) 4.7uF 25V AVX, 12063C475KAT2A (X7R 1206) 10uF 50V MURATA, GRM32ER61H106MA12 (1210 X5R) 2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812) 82uF 16V PANASONIC, 35SVPF82M 33uF 80V PANASONIC, EEHZA1K330P (10x12.5mm) L1 Coilcraft XPL2010-102ML L2 Vishay IHLP4040DZER2R0M11 L3 Coilcraft SER2915L-682KL L4 Coiltronics SD25-681 Unless otherwise specified: 0.005 Ohm Susumu KRL6432D-M-R005-F-T5 (1225) All resistors are in ohms 0603. 0.003 Ohm Susumu KRL6432D-M-R003-F-T5 (1225) All capacitors are in microfarads 0603. R110 SUSUMU, RL1632S-1R20-F (1206) All capacitors are 25V. T1 Champs, LTC-PQ26-0404-S02 1/16W = 0402, 1/10W = 0603, 1/8W = 0805, T2 Pulse, PA3493NL RUN -VIN 36V-60VIN +VIN 2512 1 3 R10 1 SGND Q3 OPT 4 FG AG IN- IN+ R149 100 AS R109 10K C102 0.1uF 0805 AG1 R8 0 AG SGNDP C119 1nF D30 ZHCS506 4 16 15 Q8 BSC190N15NS3 Q9 BSC190N15NS3 Q11 OPT C80 1nF AS 4 3 2 C72 -VIN R151 ND R52 OPT 1206 SWB C11 15nF D34 ES1PD C66 47nF 200V 1206 4 1T 6 3 1uF 16V 0805 C71 R140 274 1/8W 0805 3 C112 0.22uF 200V 1210 +VOUT PT- 25 26 C73 1nF RUN PT- PT+ 28.7K R114 5.11K 1206 C10 2.2nF 630V 1206 R121 133K SSS R111 0 C78 33nF COG 0805 FG R112 0 R77 0 0805 R75 2.61K 0805 321 8765 C51 330pF 630V 1206 D1 ES1PD SW PGND R146 0 SGND 3M 1225 R108 R118 681K SGND PGND C116 4.7uF 25V 1206 VAUX RS- R102 RS+ D38 BAS21 FG 4 L4 680uH 321 Q15 FDMS86201 Q14 FDMS86201 Q24 OPT 8765 D37 BAS21 -VOUT RS- R3 0 1 Full Schematic, Page 1 R110 1.20 1206 1/2W Q31 OPT 4 Q29 IRF6217 3 1.25T 1 T2 1 AG1 AG R101 100 250V 1812 C30 2.2nF R51 OPT 1206 C69 OPT 1206 12 13 4T 9 10 R2 0 TRANS-PA3493NL SGNDP C101 0.1uF 220pF 0805 100 C106 150pF 200V R53 6.8 1206 R136 0.005 1225/2512 PGNDP 123 5678 ND 6 5 4T 32 T1 LTCP26-0404-S02 8 2T 14 3 1 1.0uH 1 3 6 5 2 1 4 2 1 R1 0.33 GND 17 PGND 1 FS/UV 10 GND2 9 14 NDRV 2 PG 8 IS+ DELAY 6 2 7 ISISMAG 5 C8 OPT R103 0 4 VAUX R138 OPT PGND OPT R147 OPT 0 LTC3766EGN R122 0 R123 86.6K OPT 1206 R116 R124 OPT R43 0 VCC C34 10uF 50V 1210 0603 OPT R113 VCC R69 46.4K SYNC 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. OPT 7343 + C33 C103 470pF R125 17.4K SCALE = NONE DAVID B. LT APPROVALS ITH- C75 100pF ITH SGND IS+ R126 OPT DATE: N/A SIZE -VOUT C77 4.7uF 1206 R127 10K 1/4W 1206 R115 4.42K 1/4W 1206 C74 0 SGND C9 OPT DATE 12-01-14 Monday, December 01, 2014 1 SHEET 1 LTC3765EMSE / LTC3766EGN DC2199A-B 2 OF 2 REV. ACTIVE CLAMP FORWARD CONVERTER WITH DIRECT FLUX LIMIT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only R46 604 R42 1K C76 3.3nF -SENSE +SENSE - -VOUT 24VOUT / 15A +VOUT + R41 23.7K +VOUT E6 E5 E4 J4 OPT 7343 + C68 TECHNOLOGY PGND VCC VS- IC NO. C23 C25 82uF 35V + C26 J3 E3 DAVID B. +VOUT APPROVED PRODUCTION 2 1 DESCRIPTION REVISION HISTORY REV TITLE: SCHEMATIC C79 4.7nF OPT OPT R120 R119 6 13 VS+ OPT 7343 __ ECO + C7 12 R68 2.15K FB VS- VS+ OPT C70 R107 100 VCC OPT 7343 + C31 RS+ R106 100 R7 RS0 Q27 FCX491A VPK R5 OPT 2512 1 R137 R4 8.2K 2512 CUSTOMER NOTICE U2 RUN C111 0603 R6 OPT Q12 FDMS86201 Q13 FDMS86201 Q23 OPT CLAMP L3 6.8uH -VOUT 2 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C105 0 1206 R24 R23 20 1206 20 1 L1 3 2 20 FGD/SWB RUN 8 3 VSEC SS 9 23 16 2 3 28 3 5 SW REGSD 24 VAUX PHASE FG GND 14 22 VIN IPK 10 SG PGND 27 21 NDRV MODE 4 VCC FS/SYNC 15 17 4 1 3 5 6 7 8 1 2 3 SGD 19 ISITH 18 IS+ VSOUT 7 10 11 5 A B C D DEMO MANUAL DC2199A-B SCHEMATIC DIAGRAM dc2199abf Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C 5 AG C18 OPT PGNDP AG CRX 5 2 Q2 OPT VCCP Q1 PGNDP 3 4 6 1 4 4 AG1 OPT C19 7 Q1 3 4 6 1 ZXGD3002E6 5 2 PGNDP AG1 C16 56pF C14 0.1uF VCC C15 0.1uF 0805 C20 0.1uF ACTIVE SNUBBER D2 OPT RS- OPTIONAL CIRCUITS SO16 U3 HEF4528BT AC DRIVER C13 10pF 2 R12 4.99K 47pF C12 FG 5 R11 1.00K 4 A1 VSS 1 16 VDD 3 B1 RES VSS1 8 VSS2 15 2 1 D 5 RS- +VOUT 2 R14 6.8 2512 R15 6.8 2512 OPT D4 R17 100K 1206 Q4 FQD4P25 R13 6.8 2512 C17 15nF 200V 1206 1 SW 3 CLAMP C21 OPT 0805 VA Full Schematic, page 2 R19 1.5K SW 3 R31 OPT VS- SYNC PT- VS+ ITH VA 2 OPT D35 1 OPT 0805 R152 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. PGND SCALE = NONE DAVID B. LT APPROVALS C114 OPT 0805 VPK PEAK CHARGE VCC R33 OPT SYNC R28 OPT R27 OPT R32 OPT VS+ ITH OPT R34 OPT R25 PT- CUSTOMER NOTICE R30 OPT R35 OPT ITH- SSS R26 OPT PSS SGNDP LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. VS- ITH- SSS SGND PSS SGNDP 2 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DATE: N/A SIZE 1 SHEET 2 LTC3765EMSE / LTC3766EGN DC2199A OF 2 REV. 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only ACTIVE CLAMP FORWARD CONVERTER WITH DIRECT FLUX LIMIT TECHNOLOGY Monday, December 01, 2014 IC NO. TITLE: SCHEMATIC OPT HD2X7-MOLEX 14 13 12 11 10 9 8 7 6 5 4 3 2 1 J1 1 A B C D DEMO MANUAL DC2199A-B SCHEMATIC DIAGRAM dc2199abf 11 DEMO MANUAL DC2199A-B DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright (c) 2004, Linear Technology Corporation dc2199abf 12 Linear Technology Corporation LT 0215 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2015