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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-C

36V-72VIN, SYNCHRONOUS FORWARD CONVERTER

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Figure 6.

Temp Data (48Vin, 20A, 25 C, 200LFM airflow – front)

Figure 7.

Temp Data (48Vin, 20A, 25 C, 200LFM airflow – back)

Figure 8.

Temp Data (36Vin, 20A, 25 C, 200LFM airflow – front)

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Содержание LTC3725

Страница 1: ...ettling Time 40us Nominal Switching Frequency 300kHz Efficiency VIN 48V IOUT 20A 91 5 Typical OPERATING PRINCIPLES The LTC3726 controller is used on the secondary and the LTC3725 driver with self starting capability is used on the primary When an input voltage is ap plied the LTC3725 begins a controlled soft start of the output voltage As this voltage begins to rise the LTC3726 secondary controlle...

Страница 2: ...he input supply in order to meas ure the DC1031A C s input current c A voltmeter with a capability of measuring at least 72V can be placed across the input termi nals in order to get an accurate input voltage measurement 3 Turn on the power at the input NOTE Make sure that the input voltage never ex ceeds 72V 4 Check for the proper output voltage of 5 0V 5 Turn off the power at the input 6 Once th...

Страница 3: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 3 Figure1 Proper Measurement Equipment Setup Figure2 Measuring Input or Output Ripple ...

Страница 4: ... DATA Figures 3 through 11 are measured data for a typical DC1031A C Figures 12 through 21 are schematics bill of mate rials and layout Figure3 Efficiency 200lfm airflow Figure4 Output Ripple Voltage 72Vin 20Aout 50mV div 1us div 86 88 90 92 94 6 8 10 12 14 16 18 20 LOAD CURRENT A EFFICIENCY 36V 48V 72V ...

Страница 5: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 5 Figure5 Output Voltage Transient Response 48Vin 10A to 20A step Vout 200mV DIV Iout 10A div 20us DIV ...

Страница 6: ...NSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 6 Figure6 Temp Data 48Vin 20A 25 C 200LFM airflow front Figure7 Temp Data 48Vin 20A 25 C 200LFM airflow back Figure8 Temp Data 36Vin 20A 25 C 200LFM airflow front ...

Страница 7: ...STRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 7 Figure9 Temp Data 36Vin 20A 25 C 200LFM airflow back Figure10 Temp Data 72Vin 20A 25 C 200LFM airflow front Figure11 Temp Data 72Vin 20A 25 C 200LFM airflow back ...

Страница 8: ...2 Pulse PA0297 2 1 4mH 1 1 C3 C4 C5 100V 3x1 0uF C77 2 2uF 36 72Vin VOUT 100 R55 Q27 FCX491 Si7336ADP Q14 3 01K Si7336ADP Q12 D29 1N4148W R76 1K 1 4W C72 0 1uF 5 0V 20A VIN C55 470pF VOUT C78 33nF LINEAR TECHNOLOGY HAS MADE A BEST EF FORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE A...

Страница 9: ... SUBSTITUTION AND PRINTED CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE CUSTOMER NOTICE R41 R52 opt 1 4W R51 2 4 1 4W D25 LTC3725EMSE U1 3 8 9 10 7 2 4 5 1 6 11 NDRV VCC VSLMT IS GATE SSFLT FB IN FS IN ULVO PGND GND 1 5nF VSW R48 1W C81 10pF Vout Iout C79 2 2nF E7 910 R89 Q11 opt 4 5 2 3 6 7 8 1 100...

Страница 10: ...OD 123 DIODES INC 1N4148W 7 F 20 1 L1 INDUCTOR 1 0uH VISHAY DALE IHLP2525CZER1R0M01 0 L1 second source INDUCTOR 1 0uH COOPER HCP0703 1R0 R 21 1 L2 INDUCTOR 0 87uH COOPER HC1 R87 22 1 Q8 FET N CH Si7450DP POWERPAK SO 8 VISHAY Si7450DP 23 2 Q12 Q14 FET N CH Si7336ADP POWERPAK SO 8 VISHAY Si7336ADP 24 1 Q34 N CH Transistor 2N7002 SOT23 DIODES INC 2N7002 7 F 25 1 Q27 NPN TRANSISTOR FCX491 ZETEX FCX491...

Страница 11: ...sistor FMMT718 SOT23 7 5 R49 R83 R84 R87 R88 RES CHIP 0 1 16W 0603 Panasonic ERJ3GEY0R00V 8 0 R52 opt RES CHIP 1206 9 0 R53 R56 R75 opt RES CHIP 0603 11 1 R77 RES CHIP 0 1 8W 0805 AAC CJ10 000M 12 0 R86 opt RES CHIP 0805 HARDWARE FOR DEMO BOARD ONLY 1 2 E1 E2 TESTPOINT TURRET 094 MILL MAX 2501 2 2 2 E3 E4 STUD PEM KFH 032 10 3 4 E3 E4 2 EACH NUT BRASS 10 32 ANY 4 2 E3 E4 Ring Lug Ring 10 KEYSTONE ...

Страница 12: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 12 Figure15 Top ...

Страница 13: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 13 Figure16 Layer 2 ...

Страница 14: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 14 Figure17 Layer 3 ...

Страница 15: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 15 Figure18 Layer 4 ...

Страница 16: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 16 Figure19 Layer 5 ...

Страница 17: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 17 Figure20 Bottom ...

Страница 18: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A C 36V 72VIN SYNCHRONOUS FORWARD CONVERTER 18 Figure21 Bottom Mirrored ...

Страница 19: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Analog Devices Inc DC1031A C ...

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