DC2529A

DC2529A AD | Alldatasheet

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High Input Voltage Dual Output Synchronous Buck Converter Demonstration circuit 2529A is a dual output synchro - nous buck converter featuring the L TC ®7810ELXE in a 48-lead eLQFP package. Key features of this board include: an optional on-board NMOS LDO for DRVCC; jumper for spread-spectrum option; optional resistors for single output dual phase operation; a mode selector that allows the converter to run in CCM, pulse-skipping, adjustable burst clamp or default Burst Mode ® operation; SYNC turret for Poly - Phase® operation. All registered trademarks and trademarks are the property of their respective owners. PERFORMANCE SUMMARY The input voltage range of this demo board is from 16V to 130V and it uses a sense resistor for overcurrent protec- tion. The LTC7810 data sheet gives a complete descrip - tion of the part, operation and application information and must be read in conjunction with this demo manual for DC2529A. Design files for this circuit board are available. Specifications are at TA = 25°C Table 1. PARAMETER CONDITIONS VALUE Input Voltage Range 16V to 130V Output Voltage VOUT1 VIN = 16V to 130V, IOUT1 = 0A to 10A, JP4: FCM 5V ± 2% Output Voltage VOUT2 VIN = 16V to 130V, IOUT2 = 0A to 5A, JP4: FCM 12V ± 2% Maximum Output Current IOUT1,MAX VIN = 16V to 130V, IOUT1,MAX 10A Maximum Output Current IOUT2,MAX VIN = 16V to 130V, IOUT2,MAX 5A Default Operating Frequency (Typical) 100kHz External Clock Sync. Frequency Range 75kHz to 750kHz Typical Full Load Efficiency (See Figure 4) V IN = 48V, VOUT1 = 5V, IOUT1 = 10A VIN = 48V, VOUT2 = 12V, IOUT = 5A 88.7% 95.4%

Demonstration circuit DC2529A is easy to set up to evaluate the performance of the LTC7810ELXE. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: NOTE: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the input or output voltage ripple by touching the probe tip directly across the V IN or VOUT and GND terminals or directly across relevant capacitor . See Figure 2 for proper scope probe technique. 1. Place jumpers in the following positions: JP1 OFF JP2 ON JP3 ON JP4 FCM JP5 ON JP6 ON 2. With power off, connect the input power supply to VIN and GND. 3. Turn on the power at the input. NOTE : Make sure that the input voltage is higher than 16V and does not exceed 130V. 4. Check the output voltages. The output voltages should be within the specifications in Table 1. Once the proper output voltages are established, adjust the load within the operating range and observe the output voltage regulation, output voltage ripple, effi - ciency and other parameters. Note 1: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. Note 2: Do not apply load between the VOUT1+ and VOUT1– pins or between the VOUT2+ and VOUT2– pins. These pins are only intended to Kelvin sense the output voltage across the C27 and C24. Heavy load currents applied across the V OUT1+, VOUT1–, VOUT2+ and VOUT2– sense pins will dam- age these sense traces.

Table 3. Low Input Quiescent Current Configuration with adjustable clamp level by changing the position of JP4. Table 2. Mode Selection and Synchronized Operation Options Pulse-Skipping Operation P .S. P .S. JP4 setting, the DC2529A will operate in different modes. See Table 2 for the detailed description.

• Tie VOUT1 to VOUT2 by tying together the exposed cop- per pads on the VOUT shapes with pieces of heavy cop- per foil.
• Tie ITH1 to ITH2 by stuffing 0Ω at R43.
• Tie VFB1 to VFB2 by stuffing 0Ω at R45.
• Tie SS1 to SS2 by stuffing 0Ω at R44.
• Tie RUN1 to RUN2 by stuffing 0Ω at R42.
• Remove the redundant ITH compensation network, VFB divider and SS cap.
• Replace C1, C16 if necessar
• Re-compensate if necessary

Figure 7. Thermal Image VIN 130V, VOUT1 5V at 10A, VOUT2 12V at 5A No Air Flow, TA = 25°C

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 CIN1 CAP .,100µF, 200V, 20%, CAP\\NIC\\16×20 NIC, NRB-XS101M200V16X20F 2 4 CIN4, CIN5, CIN6, CIN7 CAP ., 0.47µF, 200V, 10%, 1812 MURATA, GRM43DR72E474KW01L 3 4 CIN8, CIN9, CIN10, CIN11 CAP ., 0.1µF, X7R, 200V, 10%, 1210 MURATA, GRM32DR72D104KW01L 4 1 C1 CAP ., POSCAP , 150µF, 16V, 7343 PANASONIC, 16TQC150MYF 5 2 C7, C19 CAP ., 0.01µF, X7R, 100V, 10%, 0603 MURATA, GRM188R72A103KA01D 6 2 C8, C9 CAP ., 10pF, NP0, 100V, 5%, 0603 MURATA, GRM1885C2A100JA01D 7 2 C10, C13 CAP ., 4700pF, C0G, 50V, 5%, 0603 MURATA, GRM1885C1H472JA01D 8 2 C11, C14 CAP ., 100pF, NP0, 100V, 5%, 0603 MURATA, GRM1885C2A101JA01D 9 2 C12, C20 CAP ., 1000pF, NP0, 50V, 5%, 0603 MURATA, GRM1885C1H102JA01D 10 1 C16 CAP ., POSCAP , 470µF, 6.3V, 7343 PANASONIC, 6TPE470M 11 2 C18, C25 CAP ., 0.1µF, X7R, 100V, 10%, 0603 MURATA, GRM188R72A104KA35D 12 2 C21, C35 CAP ., 4.7µF, X7R, 16V, 10%, 0805 MURATA, GRM21BR71C475KE51L 13 2 C24, C27 CAP ., X5R, 10µF, 35V, 20%, 1210 MURATA, GRM32ER6YA106MA12L 14 1 C34 CAP ., 0.033µF, X7R, 200V, 10%, 1206 MURATA, GRM31CR72D333KW03L 15 1 C36 CAP ., 0.33µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C334KA01D 16 2 D3, D4 DIODE, SCHOTTKY 150V SOD-123 CENTRAL SEMI., CMHD3595 TR 17 1 L1 IND., PWR., 15µH, 15% WURTH ELEKTRONIK, 7443631500 18 1 L2 IND., PWR., 47µH, 15% WURTH ELEKTRONIK, 7443634700 19 3 Q1, Q3, Q7 XSTR., MOSFET , N-CH, 150V, 21A, TDSON-8 INFINEON, BSC520N15NS3G 20 2 Q2, Q4 XSTR., MOSFET , N-CH, 150V, 56A, TDSON-8 BSC160N15NS5AT MA1 21 1 Q9 XSTR., MOSFET , N-CH, 150V, 1.5A, TDSON-8 VISHAY, SI3440DV-T1-E3 22 1 RS1 SENSE RES., 0.004Ω, 1%, 1/4W,1210 VISHAY, WSL12104L000FEA 23 1 RS2 SENSE RES., 0.01Ω, 1%, 1/4W, 1210 VISHAY, WSL1210R0100FEA 24 1 R3 RES., 2.2 1% 1206 VISHAY, CRCW12062R20FKEA 25 1 R8 RES., 2.2M, 1/10W, 1%, 0603 VISHAY, CRCW06032M20FKEA 26 1 R9 RES., 2.67M, 1/10W, 1%, 0603 VISHAY, CRCW06032M67FKEA 27 2 R10, R15 RES., 4.99k, 1/10W, 1%, 0603 VISHAY, CRCW06034K99FKEA 28 1 R11 RES., 200k, 1/10W, 1%, 0603 VISHAY, CRCW0603200KFKEA 29 1 R12 RES., 665k, 1/10W, 1%, 0603 VISHAY, CRCW0603665KFKEA 30 2 R14, R21 RES., 100, 1/10W, 1%, 0603 VISHAY, CRCW0603100RFKEA 31 1 R18 RES., 24.3k, 1/10W, 1%, 0603 VISHAY, CRCW060324K3FKEA 32 2 R22 , R23 RES., 1M, 1/10W, 1%, 0805 VISHA Y, CRCW08051M00FKEA 33 2 R29, R30 RES., 2.2, 1/10W, 1% 0603 VISHAY, CRCW06032R20FKEA 34 2 R34, R36 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100KFKEA 35 1 R35 RES., 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA 36 1 R40 RES., 1k, 1/10W, 1%, 0603 VISHAY, CRCW06031K00FKEA 37 1 U1 I.C., LTC7810ELXE#PBF , LQFP-7×7 ANALOG DEVICES, LTC7810ELXE#PBF

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Demo Board Circuit Components 1 0 C17, C23, C28, C32, C33 CAP ., OPTION, 0603 OPT 2 0 C15, C26 CAP ., OPTION, 1210 OPT 3 0 C30 CAP ., OPTION, 0805 OPT 4 0 D1, D2 DIODE, OPTION, DI-123 OPT 5 0 Q5, Q6, Q8 XSTR., OPTION OPT 6 7 R1, R4, R5, R13, R20, R28, R38 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA 7 0 R6, R7, R16, R17, R26, R27, R31, R33, R37, R41-R45 RES., OPTION, 0603 O P T. 8 0 R39 RES., OPTION, 0805 O P T. Hardware: For Demo Board Only 1 9 E1-E9 TEST POINT , TURRET , .094" MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0 2 6 J1, J2, J3, J4, J5, J6 CONN., BANANA JACK KEYSTONE, 575-4 3 1 JP1 HEADER, 1×4, 2MM WURTH ELEKTRONIK, 62000411121 4 2 JP2, JP3 HEADER, 1×3, 2MM WURTH ELEKTRONIK, 62000311121 5 1 JP4 HEADER, 2×4, 2MM WURTH ELEKTRONIK, 62000821121 6 2 JP5, JP6 HEADER, 1×2, 2MM WURTH ELEKTRONIK, 62000211121 7 6 XJP1, XJP2, XJP3, XJP4, XJP5, XJP6 SHUNT , 2MM WURTH ELEKTRONIK, 60800213421 8 4 MTG1-MTG4 STANDOFF , NYLON, SNAP-ON, .500" TALL WURTH ELEKTRONIK, 702935000

Information furnished by Analog Devices is believed to be accurate and reliable. However , no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. SCHEMATIC DIAGRAM A A B B C C D D E E 4 4 3 3 2 2 1 1 12V / 5A 16V UP TO 130V

2 N U R1 N U R

NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS AND CAPACITORS ARE 0603. SYNCHRONOUS BUCK CONVERTER SPREAD ON OFF SYNC BURST ADJ. BURST DEFAULT FCM P.S. DING L. 06/29/17 LT NDRV VINVIN Vout2 Vout2 Vout1 Vout1 IntVcc VIN Vout2 IntVcc Vout1 Vout2 VIN IntVcc IntVcc VIN INTVCC VIN VIN

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV PRODUCTION3 DESCRIPTION DATEAPPROVEDECO REV PRODUCTION3 DESCRIPTION DATEAPPROVEDECO REV PRODUCTION3 SIZE DATE: . V E R. O N C I SHEET OF TITLE: APPROVALS PCB DES. APP ENG. CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE 3DEMO CIRCUIT 2529A Thursday, June 29, 2017 1 1 HIGH INPUT VOLTAGE DUAL OUTPUT N/A LTC7810ELXE DING L. SIZE DATE: . V E R. O N C I SHEET OF TITLE: APPROVALS PCB DES. APP ENG. CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE 3DEMO CIRCUIT 2529A Thursday, June 29, 2017 1 1 HIGH INPUT VOLTAGE DUAL OUTPUT N/A LTC7810ELXE DING L. SIZE DATE: . V E R. O N C I SHEET OF TITLE: APPROVALS PCB DES. APP ENG. CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE 3DEMO CIRCUIT 2529A Thursday, June 29, 2017 1 1 HIGH INPUT VOLTAGE DUAL OUTPUT N/A LTC7810ELXE DING L. CIN8 0.1uF 200V 1210 R40 1k CMHD3595 VO2+ 2.2Meg R28 CIN4 0.47uF 200V 1812 R15 4.99k BSC520N15NS3G 10pF C19 0.01uF VIN- VO1- R31 OPT 10pF C32 OPT Q1 BSC520N15NS3G CIN11 0.1uF 200V 1210 C28 OPT + CIN1 100uF 200V CIN10 0.1uF 200V 1210 R26 OPT C36 0.33uF OPT CIN9 0.1uF 200V 1210 C20 1000pF +C16 470uF/6.3V 7343 R21 100 C27 10uF 1210 R41 OPT RS1 0.004 1210 C11 100pF GND R20 OPT R39 OPT 0805 EXTVCC C35 4.7uF 16V 0805 C17 OPT CIN5 0.47uF 200V 1812 R43 OPT OPT LTC7810ELXE TRACK/SS1 45 ITH1 46 VFB1 47VFB214 ITH215 TRACK/SS216 Sense2-12 Sense2+13 RUN229 EXTVCC11 SW220 TG219 Boost221 PGND 25 BG224 INTVCC 3 Vin35 BG1 37 Boost1 40 TG1 42 SW1 41 PLLIN/SPREAD 4 FREQ6 RUN1 32 Sense1+ 48 Sense1- 1 SGND5 DRVSET2 REGSD7 MODE8 OVLO9 NDRV 10 N.C. 17 N.C. 18 N.C. 22 N.C. 23 DRVCC 26 N.C. 27 N.C. 28 N.C. 30 N.C. 31 N.C. 33 N.C. 34 N.C. 36 N.C. 38N.C. 39 N.C. 43 N.C. 44 SGND49 OPT VIN R14 100 C34 0.033uF 200V 1206 R38 0.01uF CIN7 0.47uF 200V 1812 C10 4700pF R16 OPT VIN+ JP1 47uH JP2 C30 OPT 0805 R9 2.67Meg VO1+ R11 200k C18 0.1uF GND R35 10k 150uF/16V 7343 R45 OPT OPT JP6 C13 4700pF R17 OPT OPT CMHD3595 SI3440DV 5 4 R23 1Meg 0805 R18 24.3K R42 OPT VO2- CIN6 0.47uF 200V 1812 VOUT1 R37 OPT C15 OPT 1210 R12 665k VOUT2 15uH Q5 OPT GND C12 1000pF C26 OPT 1210 R22 1Meg 0805 R30 2.2 BSC160N15NS5ATMA1 JP3 C25 0.1uF JP4 MODE 1 2 3 4 5 6 7 8 R33 OPT C33 OPT R36 100k R29 2.2 C24 10uF 1210 R10 4.99K GND BSC160N15NS5ATMA1 2.2 1206 R44 OPT C14 100pF SYNC C21 4.7uF 16V 0805 R5 JP5 BSC520N15NS3G RS2 0.01 1210 R34 100k R13 R27 OPT C23 OPT DRVCC RUN1 BG2 RUN2 TG2 BG1 SS2 ITH1 SS1 RUN1 RUN2 VFB1 TG1 DRVCC ITH2 VFB2 RUN1 RUN2 ITH1 ITH2 SS1 SS2 VFB1 VFB2

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