1

DEMO MANUAL DC2814A-C

Rev. 0

DESCRIPTION

LT8210High Voltage, High Efficiency Synchronous Buck-Boost

Converter with Input to Output Pass-Thru

Demonstration circuit 2814A-C is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 26V to 80V. It can supply a 2A maximum load current with an output range of 36V to 56V. The demo board features the LT8210EUJ control-ler. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz, while an optional input or output current feedback loop pro-vides support for applications such as battery charging. With a wide input range, wide output range and seam-less transfers between operation modes, the LT8210 is ideal for industrial, automotive, medical, military and avionics applications.

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

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

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 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

DC2814A-C: 26V to 80VIN, VOUT = 36V to 56V at 2A

Design files for this circuit board are available.

Specifications are at TA = 25°C

PARAMETER CONDITIONS UNITS

Input Voltage Range 26V to 80V Continuous

Output Voltage, VOUT VIN = 26V to 80V, IOUT = 0A to 2A 36V to 56V

Maximum Output Current, IOUT VIN = 26V to 80V, VOUT = 36V to 56V 2A

Default Operating Frequency 350kHz (RT = 16.9k)

Typical Efficiency 28VIN, 36VOUT (Boost), 2A 36VIN, 36VOUT (Buck-Boost), 2A 45VIN, 45VOUT (Pass-Thru), 2A 60VIN, 56VOUT (Buck-Boost), 2A 72VIN, 56VOUT (Buck), 2A

96% 94% 99% 93% 96%

2

DEMO MANUAL DC2814A-C

Rev. 0

QUICK START PROCEDUREDemonstration circuit 2814A-C is easy to set up to evaluate the performance of the LT8210. Refer to the following procedure:

1. With power off, connect the input power supply to VIN (26V to 80V) and GND (input return).

2. Connect the 36V to 56V output load between VOUT and GND.

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 36V to 56V.

5. Once the proper output voltages are established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage and other parameters.

Note: When measuring the output or input voltage rip-ple, do not use the long ground lead on the oscilloscope probe. See Figure 1 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.

Figure 1. Measuring Output Voltage Ripple

Figure 3. Efficiency vs Input Voltage

Figure 2. Output Voltage vs Input Voltage

Figure 4. Efficiency vs Output Current

+ –

VOUT GND DC2814ac F01

COUT

VOUT (IOUT = 1A)

INPUT VOLTAGE (V)20 30 40 50 60 70 80

30

33

36

39

42

45

48

51

54

57

60

OUTP

UT V

OLTA

GE (V

)

DC2814ac F01

BOOST

BOOST-BUCK

PASS-THRU

BUCK-BOOST

BUCK

0.5A1.0A2.0A

INPUT VOLTAGE (V)20 30 40 50 60 70 80

50

55

60

65

70

75

80

85

90

95

100

EFFI

CIEN

CY (%

)

DC2814ac F03OUTPUT CURRENT (A)

0.01 0.1 1 310

20

30

40

50

60

70

80

90

100

EFFI

CIEN

CY (%

)

DC2814ac F04

28VININ

(BOOST)36V (BOOST-BUCK)48VIN (PASS-THRU)56VIN (BUCK-BOOST)70VIN (BUCK)

3

DEMO MANUAL DC2814A-C

Rev. 0

TEST RESULTS

Figure 5. DO-160 – Engine Starting Undervoltage (Z) (IOUT = 2A)

Figure 7. DO-160 Abnormal Surge Voltage (Z) (IOUT = 2A)

Figure 6. LV148 E48-07 – Slow Decrease, Fast Increase in Supply Voltage (IOUT = 2A)

Figure 8. VIN Range (IOUT = 2A)

SW150V/DIV

SW250V/DIV

400ms/DIV

VOUT20V/DIV

VIN20V/DIV

DC2814ac F05

SW150V/DIV

SW250V/DIV

200ms/DIV

VOUT20V/DIV

VIN20V/DIV

DC2814ac F06

SW150V/DIV

SW250V/DIV

100ms/DIV

VOUT20V/DIV

VIN20V/DIV

DC2814ac F07

SW150V/DIV

SW250V/DIV

20ms/DIV

VOUT20V/DIV

VIN20V/DIV

DC2814ac F08

4

DEMO MANUAL DC2814A-C

Rev. 0

TEST RESULTS

Figure 9. DC2814A-C Thermal Performance at 28VIN (Boost), 36VOUT, 2A Load Current

Figure 10. DC2814A-C Load Transients at 28VIN (Boost), 36VOUT, 0.2A to 1.8A Load Current

Figure 11. DC2814A-C Output Voltage Ripple at 28VIN (Boost), 36VOUT, 2A Load Current

2µs/DIV

VOUT50mV/DIV

DC2814ac F11

SW120V/DIV

SW220V/DIV

4ms/DIV

VOUT500mV/DIV

DC2814ac F10

5

DEMO MANUAL DC2814A-C

Rev. 0

TEST RESULTS

Figure 12. DC2814A-C Thermal Performance at 36VIN (Buck-Boost), 36VOUT, 2A Load Current

Figure 13. DC2814A-C Load Transients at 34VIN (Buck-Boost), 34VOUT, 0.2A to 1.8A Load Current

Figure 14. DC2814A-C Output Voltage Ripple at 36VIN (Buck-Boost), 36VOUT, 2A Load Current

2µs/DIV

VOUT50mV/DIV

DC2814ac F14

SW120V/DIV

SW220V/DIV

4ms/DIV

VOUT500mV/DIV

DC2814ac F13

6

DEMO MANUAL DC2814A-C

Rev. 0

TEST RESULTS

Figure 15. DC2814A-C Thermal Performance at 45VIN (Pass-Thru), 45VOUT, 2A Load Current

Figure 16. DC2814A-C Load Transients at 45VIN (Pass-Thru), 45VOUT, 0.2A to 1.8A Load Current

Figure 17. DC2814A-C Output Voltage Ripple at 45VIN (Pass-Thru), 45VOUT, 2A Load Current

SW120V/DIV

SW220V/DIV

4ms/DIV

VOUT500mV/DIV

DC2814ac F16 2µs/DIV

VOUT50mV/DIV

DC2814ac F17

7

DEMO MANUAL DC2814A-C

Rev. 0

TEST RESULTS

Figure 18. DC2814A-C Thermal Performance at 60VIN (Buck-Boost), 56VOUT, 2A Load Current

Figure 19. DC2814A-C Load Transients at 60VIN (Buck-Boost), 56VOUT, 0.2A to 1.8A Load Current

Figure 20. DC2814A-C Output Voltage Ripple at 60VIN (Buck-Boost), 56VOUT, 2A Load Current

SW150V/DIV

SW250V/DIV

4ms/DIV

VOUT500mV/DIV

DC2814ac F19 2µs/DIV

VOUT50mV/DIV

DC2814ac F20

8

DEMO MANUAL DC2814A-C

Rev. 0

TEST RESULTS

Figure 21. DC2814A-C Thermal Performance at 72VIN (Buck), 56VOUT, 2A Load Current

Figure 22. DC2814A-C Load Transients at 72VIN (Buck), 56VOUT, 0.2A to 1.8A Load Current

Figure 23. DC2814A-C Output Voltage Ripple at 72VIN (Buck), 56VOUT, 2A Load Current

SW150V/DIV

SW250V/DIV

4ms/DIV

VOUT500mV/DIV

DC2814ac F22 2µs/DIV

VOUT50mV/DIV

DC2814ac F23

9

DEMO MANUAL DC2814A-C

Rev. 0

PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C1, CFOUT1 CAP, 1µF, X7S, 100V, 10%, 0805, SOFT TERM MURATA GRJ21BC72A105KE11L TDK C2012X7S2A105K125AE

2 2 C2, C3 CAP, 33µF, X7S, 100V, 20%, 2220, AEC-Q200 TDK CAA572X7S2A336M

3 8 C7, C8, C11, C12, C15, C16, C23, C24

CAP, 0.1µF, X7S, 100V, 10%, 0603 TAIYO YUDEN HMK107C7104KA-T TDK C1608X7S2A104K080AB

4 2 C9, C10 CAP, 4.7µF, X7S, 100V, 20%, 1210 TDK C3225X7S2A475M200AB

5 2 C13, C14 CAP, 10µF, X7S, 100V, 10%, 1210 MURATA GRM32EC72A106KE05L

6 1 C18 CAP, 22µF, ALUM ELECT, 100V, 20%, 8x10.2mm SMD, AEC-Q200

PANASONIC EEETG2A220UP

7 2 C19, C20 CAP, 100µF, ALUM ELECT, 100V, 10%, 16x16.5mm SMD SUN ELECTRONIC INDUSTRIES CORP 100CE100KXT+D

8 1 C37 CAP, 1µF, X7S, 100V, 10%, 0805 , SOFT TERM AVX 08053C105KAT2A MURATA GRJ21BC72A105KE11

9 1 CC1 CAP, 0.022µF, 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, 4.7µF, 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, C0G, 50V, 5%, 0402 AVX 04025A01JAT2A MURATA GRM1555C1H101JA01D

15 1 CSN1 CAP, 1000pF, X7R, 16V, 10%, 0402 AVX 0402YC102KAT2A MURATA GRM155R71C102KA01D

16 1 CSS1 CAP, 0.1µF, X7R, 25V, 10%, 0402 AVX 04023C104KAT2A TAIYO YUDEN TMK105B7104KV-FR

17 1 CVDD1 CAP, 4.7µF, X5R, 10V, 10%, 0603 TDK CGB3B1X5R1A475K055AC

18 2 DBST1, DBST2 DIODE, RECT, 400V, 1A, SOD123F, AEC-Q101 DIODES INC US1GWF-7

19 4 E1, E2, E9, E10 TEST POINT, TURRET, 0.094", MTG HOLE MILL-MAX 2501-2-00-80-00-00-07-0

20 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

21 2 FB1, FB2 IND, 600Ω AT 100MHz, FERRITE BEAD, 25%, 2.5A, 70mΩ, 1206

WURTH ELEKTRONIK 742792118

22 4 J1, J2, J3, J4 CONN, BANANA JACK, FEMALE, THT, NON-INSULATED, SWAGE

KEYSTONE 575-4

23 1 JP1 CONN, HDR, MALE, 2x3, 2mm, VERT, STR, THT SAMTEC TMM-103-02-L-D

24 2 JP2, JP3 CONN, HDR, MALE, 2x2, 2mm, VERT, STR, THT, 10µ" Au SAMTEC TMM-102-02-L-D

25 1 L1 IND, 12µH, POWER, 20%, 7.1A, 21.5mΩ, 1212, AEC-Q200 WURTH ELEKTRONIK 7843321200

26 1 L2 IND, 3.3µH, PWR, 20%, 9A, 9mΩ, 7050 WURTH ELEKTRONIK 744314330

27 1 LB1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY THT-96-717-10

10

DEMO MANUAL DC2814A-C

Rev. 0

PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

28 5 MA1, MB1, MC1, MD1, MDG1

XSTR, MOSFET, N-CH, 100V, 40V, PG-TSDSON-8 INFINEON BSZ150N10LS3 G INFINEON BSZ150N10LS3GATMA1

29 4 MP1, MP2, MP3, MP4

STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE 8833

30 1 PCB1 PCB, DC2814A PHASE 3 600-DC2814A

31 1 R1A1 RES, 348kΩ, 1%, 1/16W, 0402 KOA SPEER RK73H1ETTP3483F VISHAY CRCW0402348KFKED YAGEO RC0402FR-07348KL

32 3 R1B1, R2B1, RC1 RES, 10kΩ, 1%, 1/16W, 0402 VISHAY CRCW040210K0FKED NIC NRC04F1002TRF

33 7 R1C1, R2C1, R12, R13, R34, RBG1, RBG2

RES, 0Ω, 1/16W, 0402 ROHM MCR01MZPJ000 VISHAY CRCW04020000Z0ED NIC NRC04ZOTRF YAGEO RC0402JR-070RL

34 1 R2A1 RES, 536kΩ, 1%, 1/16W, 0402 VISHAY CRCW0402536KFKED

35 2 R23, R24 RES, 10Ω, 1%, 1/16W, 0402, AEC-Q200 NIC NRC04F10R0TRF VISHAY CRCW040210R0FKED

36 4 R35, RBST1, RBST2, ROUT1

RES, 1Ω, 1%, 1/16W, 0402 VISHAY CRCW04021R00FKED

37 1 RC2 RES, 60.4kΩ, 1%, 1/16W, 0402 NIC NRC04F6042TRF VISHAY CRCW040260K4FKED

38 1 REN1 RES, 287kΩ, 1%, 1/16W, 0402, AEC-Q200 VISHAY CRCW0402287KFKED

39 1 REN2 RES, 165kΩ, 1%,1 /16W, 0402, AEC-Q200 VISHAY CRCW0402165KFKED

40 1 RIMON1 RES, 41.2kΩ, 1%, 1/16W, 0402, AEC-Q200 VISHAY CRCW040241K2FKED

41 1 RIN1 RES, 0Ω, 1/8W ,0805 VISHAY CRCW08050000Z0EA YAGEO RC0805JR-070RL

42 1 RPWGD1 RES, 100kΩ, 1%, 1/16W, 0402, AEC-Q200 NIC NRC04F1003TRF VISHAY CRCW0402100KFKED

43 1 RSNS1 RES, 0.008Ω, 1%, 1W, 1206, 4-TERM, SENSE, AEC-Q200 SUSUMU KRL3216T4-M-R008-F-T5

44 1 RSNS2 RES, 0.01Ω, 1%, 1W, 1206, 4-TERM, SENSE, AEC-Q200 SUSUMU KRL3216T4-M-R010-F-T5

45 1 RT1 RES, 16.9kΩ, 1%, 1/10W, 0603, AEC-Q200 NIC NRC06F1692TRF PANASONIC ERJ3EKF1692V VISHAY CRCW060316K9FKEA

46 1 RXVCC1 RES, 1kΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY CRCW06031K00FKEA NIC NRC06F1001TRF PANASONIC ERJ3EKF1001V

47 1 STNCL1 TOOL, STENCIL, 700-DC2814A ANALOG DEVICES 830-DC2814A

48 1 U1 IC, 100V, BUCK-BOOST CONTROLLER, QFN-40 (6x6) ANALOG DEVICES LT8210EUJ#PBF ANALOG DEVICES LT8210EUJ#TRPBF

49 3 XJP1, XJP2, XJP3 CONN, SHUNT, FEMALE, 2-POS, 2mm SAMTEC 2SN-BK-G

11

DEMO MANUAL DC2814A-C

Rev. 0

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.

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DEMO MANUAL DC2814A-C

Rev. 0

ANALOG DEVICES, INC. 2019

09/19www.analog.com

ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.

Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.