DEMO MANUAL DC2814A-B LT8210 High Voltage, High Efficiency Synchronous Buck-Boost Converter with Input to Output Pass-Thru DESCRIPTION Demonstration circuit 2814A-B is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 9V to 80V. It can supply a 2.5A maximum load current with an output range of 24V to 34V. The demo board features the LT8210EUJ controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz, while an optional input or output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range, and seamless transfers between operation modes, the LT8210 is ideal for industrial, automotive, medical, military, and avionicsapplications. the input voltage is within a user programmable window. Switching losses drop to zero and efficiency is maximized. For input voltage above or below the pass-thru window, the buck or boost regulation loops maintain the output at the set maximum or minimum values, respectively. Reverse input protection to -40V is also implemented on this demo board. The converter has four modes of operation: burst, pulse skip, forced continuous mode, or pass-thru. Pass-thru is a feature that passes the input directly to the output when DC2814A-C: 26V to 80VIN, VOUT = 36V to 56V at 2A The available versions of the DC2814A are: DC2814A-A: 8V to 40VIN, 80VIN Surge (60s), Operates Down to 3.5VIN after Start-Up, VOUT = 8V to 16V at 3A DC2814A-B: 9V to 36VIN, 80VIN Surge (60s), VOUT = 24V to 36V at 2.5A Design files for this circuit board are available. All registered trademarks and trademarks are the property of their respective owners. PERFORMANCE SUMMARY PARAMETER Specifications are at TA = 25C CONDITIONS UNITS Output Voltage, VOUT VIN = 9V to 80V, IOUT = 0A to 2.5A 24V to 34V Maximum Output Current, IOUT VIN = 9V to 80V, VOUT = 24V to 34V 2.5A Input Voltage Range 9V to 36V Continuous, 80V Surge (60 Seconds) 385kHz (RT = 16.9k) Default Operating Frequency Typical Efficiency 18VIN, 24VOUT (Boost), 2.5A 24VIN, 24VOUT (Buck-Boost), 2.5A 30VIN, 30VOUT (Pass-Thru) 2.5A 38VIN, 34VOUT (Buck-Boost), 2.5A 40VIN, 34VOUT (Buck), 2.5A 95% 94% 99% 93% 97% Rev. 0 1 DEMO MANUAL DC2814A-B QUICK START PROCEDURE Demonstration circuit 2814A-B is easy to set up to evaluate the performance of the LT8210. Refer to the followingprocedure: 1.With power off, connect the input power supply to VIN (9V to 36V) and GND (input return). 2.Connect the 24V to 34V output load between VOUT andGND. 3.Connect the DVMs to the input and the output. 4.Turn on the input power supply and then check for the proper output voltages. VOUT should be 24V to 34V. 5.Once the proper output voltages are established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage and otherparameters. 6.The input voltage may be raised up to 80V for short periods of time. Note: When measuring the output or input voltage ripple, do not use the long ground lead on the oscilloscope probe. See Figure1 for the proper scope probe technique. Short, stiff leads need to be soldered to the (+) and (-) terminals of an output capacitor. The probe's ground ring needs to touch the (-) lead and the probe tip needs to touch the (+) lead. 40 38 + OUTPUT VOLTAGE (V) 36 - COUT 34 32 30 28 26 24 VOUT GND DC2814ab F01 22 20 Figure1. Measuring Output Voltage Ripple VOUT (IOUT = 1.0 A) 10 15 20 25 30 35 40 INPUT VOLTAGE (V) 45 50 DC2914ab F02 Figure2. Output Voltage vs Input Voltage Rev. 0 2 DEMO MANUAL DC2814A-B 100 100 95 90 90 80 85 BUCK 80 PASS-THRU BOOST 75 BOOST-BUCK 70 EFFICIENCY (%) EFFICIENCY (%) QUICK START PROCEDURE BUCK-BOOST 70 60 50 40 65 30 60 20 0.5A 1.0A 2.0A 55 50 10 15 20 25 30 35 40 INPUT VOLTAGE (V) 45 18VIN (BOOST) 24VIN (BOOST-BUCK) 30VIN (PASS-THRU) 36VIN (BUCK-BOOST) 41VIN (BUCK) 10 0 0.01 50 0.1 1 OUTPUT CURRENT (A) 5 DC2814ab F04 DC2814ab F03 Figure3. Efficiency vs Input Voltage Figure4. Efficiency vs Output Current VIN 50V/DIV VOUT 10V/DIV SW1 50V/DIV SW2 50V/DIV 400ms/DIV DC2814ab F05 Figure5. DO-160 - Engine Starting Undervoltage (Z) (IOUT = 2.5A) Rev. 0 3 DEMO MANUAL DC2814A-B TEST RESULTS VIN 50V/DIV VOUT 10V/DIV SW1 50V/DIV SW2 50V/DIV 200ms/DIV DC2814ab F06 Figure6. MIL1275D - Starting Disturbance (Engine Cranking) (IOUT = 2.5A) VIN 50V/DIV VOUT 10V/DIV SW1 50V/DIV SW2 50V/DIV 100ms/DIV DC2814ab F07 Figure7. MIL1275D - Positive Surge 70V for 275ms (IOUT = 2.5A) Rev. 0 4 DEMO MANUAL DC2814A-B TEST RESULTS VIN 50V/DIV VOUT 10V/DIV SW1 50V/DIV SW2 50V/DIV 100ms/DIV DC2814ab F08 Figure8. DO-160 - Abnormal Surge Voltage (Z) (IOUT = 2.5A) VIN 20V/DIV VOUT 20V/DIV SW1 50V/DIV SW2 50V/DIV 10ms/DIV DC2814ab F09 Figure9. VIN Range (IOUT = 2.5A) Rev. 0 5 DEMO MANUAL DC2814A-B TEST RESULTS Figure10. DC2814A-B Thermal Performance at 18VIN (Boost), 24VOUT, 2.5A Load Current VOUT 500mV/DIV VOUT 50mV/DIV SW1 20V/DIV SW2 20V/DIV 4ms/DIV DC2814ab F11 Figure11. DC2814A-B Load Transients at 18VIN (Boost), 24VOUT, 0.25A to 2.25A Load Current 2s/DIV DC2814ab F12 Figure12. DC2814A-B Output Voltage Ripple at 18VIN (Boost), 24VOUT, 2.5A Load Current Rev. 0 6 DEMO MANUAL DC2814A-B TEST RESULTS Figure13. DC2814A-B Thermal Performance at 24VIN (Buck-Boost), 24VOUT, 2.5A Load Current VOUT 500mV/DIV VOUT 50mV/DIV SW1 20V/DIV SW2 20V/DIV 4ms/DIV DC2814ab F14 Figure14. DC2814A-B Load Transients at 23VIN (Buck-Boost), 24VOUT, 0.25A to 2.25A Load Current 2s/DIV DC2814ab F15 Figure15. DC2814A-B Output Voltage Ripple at 24VIN (Buck-Boost), 24VOUT, 2.5A Load Current Rev. 0 7 DEMO MANUAL DC2814A-B TEST RESULTS Figure16. DC2814A-B Thermal Performance at 30VIN (Pass-Thru), 30VOUT, 2.5A Load Current VOUT 500mV/DIV VOUT 50mV/DIV SW1 20V/DIV SW2 20V/DIV 4ms/DIV DC2814ab F17 Figure17. DC2814A-B Load Transients at 30VIN (Pass-Thru), 30VOUT, 0.25A to 2.25A Load Current 2s/DIV DC2814ab F18 Figure18. DC2814A-B Output Voltage Ripple at 30VIN (Pass-Thru), 30VOUT, 2.5A Load Current Rev. 0 8 DEMO MANUAL DC2814A-B TEST RESULTS Figure19. DC2814A-B Thermal Performance at 38VIN (Buck-Boost), 34VOUT, 2.5A Load Current VOUT 200mV/DIV VOUT 50mV/DIV SW1 20V/DIV SW2 20V/DIV 4ms/DIV DC2814ab F20 Figure20. DC2814A-B Load Transients at 38VIN (Buck-Boost), 34VOUT, 0.25A to 2.25A Load Current 2s/DIV DC2814ab F21 Figure21. DC2814A-B Output Voltage Ripple at 38VIN (Buck-Boost), 34VOUT, 2.5A Load Current Rev. 0 9 DEMO MANUAL DC2814A-B TEST RESULTS Figure22. DC2814A-B Thermal Performance at 40VIN (Buck), 34VOUT, 2.5A Load Current VOUT 200mV/DIV VOUT 50mV/DIV SW1 20V/DIV SW2 20V/DIV 4ms/DIV DC2814ab F23 Figure23. DC2814A-B Load Transients at 40VIN (Buck), 34VOUT, 0.25A to 2.25A Load Current 2s/DIV DC2814ab F24 Figure24. DC2814A-B Output Voltage Ripple at 40VIN (Buck), 34VOUT, 2.5A Load Current Rev. 0 10 DEMO MANUAL DC2814A-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 2 C1, CFOUT1 CAP, 1F, X7S, 100V, 10%, 0805, SOFT TERM MURATA GRJ21BC72A105KE11L TDK C2012X7S2A105K125AE 2 5 C7, C8, C11, C12, C23 CAP, 0.1F, X7S, 100V, 10%, 0603 TAIYO YUDEN HMK107C7104KA-T TDK C1608X7S2A104K080AB 3 6 C9, C10, C21, C22, C31, CAP, 4.7F, X7S, 100V, 20%, 1210 C32 TDK C3225X7S2A475M200AB 4 2 C13, C14 CAP, 10F, X7S, 50V, 10%, 1210 TDK C3225X7S1H106K250AB 5 3 C15, C16, C24 CAP, 0.1F, X7R, 50V, 10%, 0603, AEC-Q200 TDK CGA3E2X7R1H104K080AA 6 1 C18 CAP, 22F, ALUM ELECT, 100V, 20%, 8x10.2mm SMD, AEC-Q200 PANASONIC EEETG2A220UP 7 2 C19, C20 CAP, 220F, ALUM ELECT, 50V, 20%, SMD SUN ELECTRONIC INDUSTRIES CORP 50CE220KX 8 1 C37 CAP, 1F, X7S, 100V, 10%, 0805 , SOFT TERM AVX 08053C105KAT2A MURATA GRJ21BC72A105KE11 9 1 CC1 CAP, 0.022F, X7R, 16V, 10%, 0402 AVX 0402YC223KAT2A MURATA GRM155R71C223KA01D 10 1 CC2 CAP, 2200pF, X7R, 16V, 10%, 0402 AVX 0402YC222KAT2A KEMET C0402C222K4RACTU MURATA GRM155R71C222KA01D 11 1 CGATE1 CAP, 4.7F, X5R, 10V, 10%, 0402 TDK C1005X5R1A475K050BC 12 1 CIMON1 CAP, 3300pF, X7R, 16V, 10%, 0402 AVX 0402YC332KAT2A MURATA GRM15XR71C332KA86D 13 1 CP1 CAP, 330pF, X7R, 50V, 10%, 0402 AVX 04025C331KAT2A KEMET C0402C331K5RACTU NIC NMC0402X7R331K50TRPF 14 1 CP2 CAP, 100pF, NP0, 25V, 5%, 0402 AVX 04023A101JAT2A 15 1 CSN1 CAP, 1000pF, X7R, 16V, 10%, 0402 AVX 0402YC102KAT2A MURATA GRM155R71C102KA01D 16 1 CSS1 CAP, 0.1F, X7R, 25V, 10%, 0402 AVX 04023C104KAT2A TAIYO YUDEN TMK105B7104KV-FR 17 1 CVDD1 CAP, 4.7F, X5R, 10V, 10%, 0603 TDK CGB3B1X5R1A475K055AC 18 1 CXVCC1 CAP, 4.7F, X5R, 16V, 20%, 0603 TDK C1608X5R1C475M080AC 19 2 DBST1, DBST2 DIODE, RECT, 400V, 1A, SOD123F, AEC-Q101 DIODES INC US1GWF-7 20 4 E1, E2, E9, E10 TEST POINT, TURRET, 0.094", MTG HOLE MILL-MAX 2501-2-00-80-00-00-07-0 21 7 E3, E4, E6, E7, E8, E11, E12 TEST POINT, TURRET, 0.064", MTG HOLE MILL-MAX 2308-2-00-80-00-00-07-0 22 2 FB1, FB2 IND, 600 AT 100MHz, FERRITE BEAD, 25%, 2.5A, 70m, 1206 WURTH ELEKTRONIK 742792118 23 4 J1, J2, J3, J4 CONN, BANANA JACK, FEMALE, THT, NON-INSULATED, SWAGE KEYSTONE 575-4 24 1 JP1 CONN, HDR, MALE, 2x3, 2mm, VERT, STR, THT SAMTEC TMM-103-02-L-D 25 2 JP2, JP3 CONN, HDR, MALE, 2x2, 2mm, VERT, STR, THT, 10" Au SAMTEC TMM-102-02-L-D 26 1 L1 IND, 12H, PWR, 20%, 1212, AEC-Q200 WURTH ELEKTRONIK 7843321200 27 1 L2 IND, 1.5H, PWR, 20%, 13A, 4.3m, 7050 WURTH ELEKTRONIK 744314150 28 1 LB1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY THT-96-717-10 29 3 MA1, MB1, MDG1 XSTR, MOSFET, N-CH, 100V, 40V, PG-TSDSON-8 INFINEON BSZ150N10LS3 G INFINEON BSZ150N10LS3GATMA1 Rev. 0 11 DEMO MANUAL DC2814A-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 30 2 MC1, MD1 XSTR, MOSFET, N-CH, 40V, 40A, PG-TSDSON-8 INFINEON BSZ040N04LS G INFINEON BSZ040N04LSGATMA1 31 4 MP1, MP2, MP3, MP4 STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE 8833 32 1 PCB1 PCB, DC2814A PHASE 3 600-DC2814A 33 1 R1A1 RES, AEC-Q200, 232k, 1%, 1/16W, 0402 VISHAY CRCW0402232KFKED 34 3 R1B1, R2B1, RC1 RES, 10k, 1%, 1/16W, 0402 VISHAY CRCW040210K0FKED NIC NRC04F1002TRF 35 8 R1C1, R2C1, R12, R13, RES, 0, 1/16W, 0402 R33, R34, RBG1, RBG2 ROHM MCR01MZPJ000 VISHAY CRCW04020000Z0ED NIC NRC04ZOTRF YAGEO RC0402JR-070RL 36 1 R2A1 RES, 332k, 1%, 1/16W, 0402 NIC NRC04F3323TRF VISHAY CRCW0402332KFKED 37 2 R23, R24 RES, 10, 1%, 1/16W, 0402, AEC-Q200 NIC NRC04F10R0TRF VISHAY CRCW040210R0FKED 38 4 R35, RBST1, RBST2, ROUT1 RES, 1, 1%, 1/16W, 0402 VISHAY CRCW04021R00FKED 39 1 RC2 RES, 60.4k, 1%, 1/16W, 0402 NIC NRC04F6042TRF VISHAY CRCW040260K4FKED 40 1 REN1 RES, 287k, 1%, 1/16W, 0402, AEC-Q200 VISHAY CRCW0402287KFKED 41 1 REN2 RES, 165k, 1%, 1/16W, 0402, AEC-Q200 VISHAY CRCW0402165KFKED 42 1 RIMON1 RES, 41.2k, 1%, 1/16W, 0402, AEC-Q200 VISHAY CRCW040241K2FKED 43 1 RIN1 RES, 0, 1/8W, 0805 VISHAY CRCW08050000Z0EA YAGEO RC0805JR-070RL 44 1 RPWGD1 RES, 100k, 1%, 1/16W, 0402, AEC-Q200 NIC NRC04F1003TRF VISHAY CRCW0402100KFKED 45 1 RSNS1 RES, 0.004, 1%, 1W, 1206, 4-TERM, SENSE, AEC-Q200 SUSUMU KRL3216T4-M-R004-F-T1 46 1 RSNS2 RES, 0.01, 1%, 1W, 1206, 4-TERM, SENSE, AEC-Q200 SUSUMU KRL3216T4-M-R010-F-T5 47 1 RT1 RES, 16.9k, 1%, 1/10W, 0603, AEC-Q200 NIC NRC06F1692TRF PANASONIC ERJ3EKF1692V VISHAY CRCW060316K9FKEA 48 1 STNCL1 TOOL, STENCIL, 700-DC2814A ANALOG DEVICES 830-DC2814A 49 1 U1 IC, 100V, BUCK-BOOST CONTROLLER, QFN-40 (6x6) ANALOG DEVICES LT8210EUJ#PBF ANALOG DEVICES LT8210EUJ#TRPBF 50 3 XJP1, XJP2, XJP3 CONN, SHUNT, FEMALE, 2-POS, 2mm SAMTEC 2SN-BK-G Rev. 0 12 A B C D BST2 BST1 E4 E7 E6 VDD * EXT SYNC NO SYNC/SSFM 6 5 BURST MODE GND VDD VDD VDD GND VDD 5 DISCONTINUOUS CONDUCTION (DCM) GND GND PASS-THRU MODE CONTINUOUS CONDUCTION (CCM) MODE 2 MODE 1 JP1 SSFM 4 4 2 4 2 * R33 RPWGD1 100K VDD REN2 165k DG E11 0805 0 NC NC NC NC NC NC NC SYNC/SPRD MODE2 MODE1 IMON PWGD VDD GATEVCC EXTVCC CSS1 0.1uF 12 14 17 26 32 36 38 1 39 40 7 2 5 24 25 4 * CP1 U1 C23 0.1uF 100V 0603 C1 1uF 0805 100V * C21 C22 C31 C32 3.3uH - 744314330 RT1 16.9k 400kHz L2 1.5uH - 744314150 1.5uH - 744314150 C17 OPT RIN1 R34 0 LT8210-UJ OPT 3 JP3 MODE 2 JP2 MODE 1 VOUT E3 REN1 287K C27 + MDG1 BSZ150N10LS3 G 3 2 5 1 12uH - 7843321200 -C SYNC/SSFM 1 2 3 1 3 1 CVDD1 4.7uF 0603 10V 4.7uF CGATE1 * CXVCC1 RXVCC1 SWITCHING MODE E8 E2 E1 EN/UVLO VDD GND VDD GND CIMON1 3300pF *JP1, JP2, JP3 TABLE * RIMON1 EXT SYNC IMON J2 J1 PGOOD DBST2 US1GWF-7 DBST1 US1GWF-7 ** VIN -A 3 V - 40V (Start-up VIN > 8V) -B 9V - 36V -C 26V - 80V 12uH - 7843321200 4 **VIN L1 4.2uH - 744325420 * CC1 * RC1 OPT RC3 * L2 CC2 2200pF RC2 60.4k FB2 FB1 SNSN2 SNSP2 TG2 SW2 BG2 SNSN1 SNSP1 BG1 SW1 TG1 BST1 BST2 VOUT VINP C37 10 11 15 16 18 19 21 30 31 23 4 3 RBST1 1 RBST2 1 0805 ROUT1 1 4 CP2 C25 OPT CSN1 1000pF * 0 RBG1 22nF 22nF RSNS3 OPT CFOUT1 1uF SNP CC1 3 2200pF MA1 BSZ150N10LS3 G 4 R35 1 BSZ150N10LS3 G 28 29 27 20 13 1uF 0805 * C2 C3 10k 330pF 348k 38.3k 330pF 232k RC1 10k CP1 220pF R1A1 69.8k 33 SKU OPT -B 37 R24 10 10 R23 MB1 3 2 1 0 R13 0 R12 SNN * RSNS1 0.1uF 0603 C7 BST2 E12 BST1 * L1 C8 0.1uF 0603 C18 + C9 4.7uF 22uF 100V 1210 100V VINP * MD1 OPEN 0 ohm + C14 10uF 1210 100V SNP 4 SNN 2 * 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. 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SKU NO. FB2 FB1 33uF OPEN OPEN C2, C3 J3 E9 GND GND *** VOUT 8V - 16V @ 3A 24V - 34V @ 2.5A 36V - 56V @ 2A E10 J4 C24 0.1uF 0603 -A -B -C ***VOUT OPEN 4.7uF 4.7uF C21, C22, C31, C32 1 REV02 REV02 DATE: 12-18-17 1 SHEET 1 OF 710-DC2814A_REV02 SCHEMATIC NO. AND REVISION: High Voltage Syncronous 4-Switch Buck-Boost DC/DC Controller with Pass-Thru 1 www.linear.com Phone: (408)432-1900 TITLE: DEMO CIRCUIT SCHEMATIC, TOOL, STENCIL, 700-DC2814A PCB, DC2814A LABEL SPEC, DEMO BOARD SERIAL NUMBER www.analog.com STNCL1 PCB1 LB1 STANDOFF,NYLON,SNAP-ON,0.50" STANDOFF,NYLON,SNAP-ON,0.50" STANDOFF,NYLON,SNAP-ON,0.50" MP4 MP2 MP3 STANDOFF,NYLON,SNAP-ON,0.50" MP1 PCA ADDITIONAL PARTS WURTH ELEKTRONIK 742792118 VOUT 1k OPEN OPEN RXVCC1 PCA BOM: 700-DC2814A_REV02 PCA ASS'Y: 705-DC2814A_REV02 R2B1 10k 1% SCALE = NONE * R2A1 * SEE TABLE SIZE: N/A * C20 + OPEN 4.7uH 4.7uF CXVCC1 R2C1 0 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A MF CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; PCB DES. HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO CG APP ENG. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED IC NO. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR LT8210 TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE ALL RESISTORS AND CAPACITORS ARE 0402 PACKAGE. * C19 110K R3C1 R1B1 10k 1% R1A1 R1C1 0 RSNS2 0.01 KRL3216T4-M-R010-F-T5 3 1 C16 0.1uF 0603 100V 4 mOhm 41.2k 8 mOhm 4 mOhm 27.4k 41.2k RSNS1 RIMON NOTE: UNLESS OTHERWISE SPECIFIED RBG2 0 4 0 ohm C13 10uF 1210 100V 0 ohm OPEN C12 0.1uF 0603 100V R33 OPEN 2 R32 4 C11 0.1uF 0603 100V C15 0.1uF 0603 100V 100uF 220uF 330uF C19, C20 C10 4.7uF 1210 100V MC1 * BSZ150N10LS3 G 100pF 536k MC1, MD1 BSZ040N04LS G 100pF 332k BSZ036NE2LS CP2 220pF R2A1 150k OPT -A 35 VIN RSNPB1 4 5 1 2 3 34 DG RSNPA1 5 1 2 3 5 3 2 1 *Assembly Table SS 6 RT 3 EN/UVLO GND PGND GND 4 22 41 VC1 8 VC2 9 5 3 2 1 5 A B C D DEMO MANUAL DC2814A-B SCHEMATIC DIAGRAM Rev. 0 13 DEMO MANUAL DC2814A-B ESD Caution ESD (electrostatic discharge) sensitive device. 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