DEMO MANUAL DC2348A-A/DC2348A-B LTC3871 High Power PolyPhase(R) Bi-Directional Supply/Charger Description Demonstration circuit 2348A is a high power high efficiency bi-directional synchronous buck or boost converter featuring the LTC(R)3871 and is available in two versions. The DC2348A-A operates with two each LTC3871 devices with four phases and the DC2348A-B utilizes one LTC3871 device with two phases. Synchronization to an external clock (frequency range 100 kHz to 300 kHz) is also possible on these boards. When operating in buck mode, this demo circuit has an input voltage range of 30V to 75V and produces a 12V output. When operating in boost mode, the input voltage is from 10V to 13V and produces a 48V output voltage. The LTC3871 data sheet gives a complete description of the part's operation and application information and must be read in conjunction with this quick start guide. Both boards have a switch that allows the converter to run in either buck or boost mode. A DC voltage source can be connected to the SETCUR turret to set the average inductor current in each phase of the converter. Both boards also utilize a mode jumper to select forced continuous conduction mode, buck-mode only pulse-skipping or full pulse-skipping mode for buck and boost. The demo circuit senses inductor current with a sense resistor. An optional DCR sense circuit utilizes the inductor's DCR as the current sensing element further saving cost, footprint and improving efficiency. Design files for this circuit board are available at http://www.linear.com/demo/DC2348A L, LT, LTC, LTM, Linear Technology, PolyPhase and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Performance Summary DC2348A-A (4-Phase) Buck Mode SYMBOL PARAMETER CONDITIONS MIN VHIGH Supply Range 30 VLOW Output Voltage 11.8 TYP MAX 75 V 12 12.2 V 60 A Output Current fSW Operating Frequency Efficiency 48V to 12V at 60A SYMBOL PARAMETER CONDITIONS VLOW Supply Range 10 VHIGH Output Voltage 47 UNITS 110 kHz 97.5 % Boost Mode MIN TYP 48 Output Current fSW MAX V 49 V 15 Operating Frequency Efficiency 12V to 48V at 15A UNITS 13 A 110 kHz 97 % dc2348aabf 1 DEMO MANUAL DC2348A-A/DC2348A-B Performance SUMMARY DC2348-B (2-Phase) Buck Mode SYMBOL PARAMETER CONDITIONS MIN VHIGH Supply Range 30 VLOW Output Voltage 11.8 TYP MAX 75 V 12 12.2 V Output Current 30 Operating Frequency fSW Efficiency 48V to 12V at 30A SYMBOL PARAMETER CONDITIONS VLOW Supply Range 10 VHIGH Output Voltage 47 UNITS A 110 kHz 97 % Boost Mode MIN TYP 48 Output Current Operating Frequency fSW Efficiency 12V to 48V at 7.5A MAX UNITS 13 V 49 V 7.5 A 110 kHz 97 % Quick Start Procedure Demonstration circuit DC2348A has voltage regulation (CV) and current regulation (CC) modes that can be evaluated. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: 2.With the power off, connect the input power supply to VHIGH and GND. Connect the load to VLOW and GND. The load current should be less than 60A for DC2348A-A and less than 30A for DC2348A-B. 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 VHIGH or VLOW and GND terminals or directly across relevant capacitor. See Figure 2 for proper scope probe technique. 3.Connect the SETCUR turret according to the BUCK/ BOOST setting: For CV (constant voltage) buck mode (VHIGH is the input and VLOW is the output): 1.Place jumpers in the following positions: JP1ILIM OPEN JP2PHASE1OPEN JP3MODE FCM JP4RUN OFF JP6PHASE2GND S1 BUCK/BOOSTBUCK Buck:SETCUR = V5 (JP1 pin 2) Boost:SETCUR = GND 4.Turn on the power at the input. NOTE: Make sure that the input voltage is between 30V and 75V. 5.Change the JP4 to ON position. 6.Check for the proper output voltage (VLOW = 11.8V to 12.2V). NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 7. Once the proper output voltage is established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. dc2348aabf 2 DEMO MANUAL DC2348A-A/DC2348A-B Quick Start Procedure 8. Disconnect the load from the DC2348A and then turn off the input power. NOTE: Make sure that the input voltage is between 10V and 13V. For CV boost mode (VLOW is the input and VHIGH is the output). Check for the proper output voltage (VHIGH = 47V to 49V). 9.Change the S1 position from BUCK to BOOST. 10. Connect the input power supply to VLOW and GND. Connect the load to VHIGH and GND. The load current should be less than 15A for DC2348A-A and less than 7.5A for DC2348A-B. 11.Turn on the input power. 12. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. For CC (constant current) mode operation: 1.Use the same afore mentioned jumpers setting. 2.An electronic load active in CV (constant voltage) mode is required as the current-sinking device. Set the electronic load voltage to below 11V or below 46V for buck or boost mode respectively. Figure 1. Proper Measurement Equipment Setup (Buck Mode) dc2348aabf 3 DEMO MANUAL DC2348A-A/DC2348A-B Quick Start Procedure 3.With the power off, connect the input power supply and the load according to the BUCK/BOOST setting: POWER SUPPLY ELECTRONIC LOAD BUCK VHIGH VLOW BOOST VLOW VHIGH 6.Adjust the SETCUR back to 1.25V. Change the JP4 to OFF position. Turn off the input power. For battery charging applications, SETCUR can be programmed dynamically on-the-fly to set the charging currents to the batteries in either BUCK or BOOST mode. The BUCK/BOOST mode can also be set dynamically: Toggle the S1 switch to the middle position and drive the BUCK turret by a signal generator. 4.Connect a DC voltage source between the SETCUR and GND turrets. Set the initial DC voltage to 1.25V. The valid SETCUR voltage range is 1.25V to 2V for BUCK mode and 1.25V to 0.5V for BOOST mode. Turn on the power and then change the JP4 to ON position. BUCK: BOOST: 0V NOTE (Constant Current Mode Only): When doing the bidirectional current transition tests, both VHIGH and VLOW sides need a power supply and an electronic load which is active in the CV mode. In this case, the electronic load functions like a battery which is being charged. Make sure the power supply voltages are always below the same side electronic load voltages. See Figure 3 for proper equipment setup. NOTE: Watch closely for the load current, which is proportional to the SETCUR voltage. At SETCUR = 1.25V the load current may or may not be zero, depending upon the different ILIM settings. 5. Observe the IMON1 or IMON2 turret voltage. It should be equal to the SETCUR voltage until the ILIM-set current limit is hit. + - COUT VOUT 5V GND Figure 2. Measuring Input or Output Ripple Across Terminals or Directly Across Bulk Capacitor + VHIGH SUPPLY VHIGH ELECTRONIC LOAD (CV) ENABLED + VLOW DC2348A (-A OR -B) SETCUR + ELECTRONIC LOAD (CV) ENABLED GND VLOW SUPPLY - 0.5V ~ 2V DC VOLTAGE DC2348 F03 Figure 3. Proper Equipment Setup For Bidirectional Current Transition Tests (DC2348A in CC Mode) dc2348aabf 4 DEMO MANUAL DC2348A-A/DC2348A-B OPTIONAL INDUCTOR DCR CURRENT SENSING Demonstration circuit 2348A provides an optional circuit for Inductor DCR current sensing. Inductor DCR current sensing uses the DCR of the inductor to sense the inductor current instead of discrete sense resistors. The advantages of DCR sensing are lower cost, reduced board space and higher efficiency, but the disadvantage is a less accurate current limit. If DCR sensing is used, be sure to select an inductor with sufficiently high saturation current or use an iron powder type material. Refer to Table 2 for Optional Inductor DCR Current Sensing setup and to the data sheet for more details. Table 2. Optional Inductor DCR Current Sensing Configuration CHANNEL1 RS1 R39 R26 C32 CHANNEL2 RS2 R40 R25 C33 CHANNEL3 RS3 R43 R79 C34 CHANNEL4 RS4 R49 R54 C35 OPEN Current Sense Resistor (Default) REF SCH REF SCH OPEN Inductor DCR Current Sensing 0 Copper OPEN Calculated Value from Data Sheet 99 97 95 EFFICIENCY (%) 93 91 89 87 85 83 81 VIN = 36V 79 VIN = 75V 77 75 VIN = 48V 0 5 10 15 IOUT (A) 20 30 25 dc2348a F04 Figure 4. DC2348A-B Buck Mode Typical Efficiency vs Load Current 99 97 95 EFFICIENCY (%) 93 91 89 87 85 83 81 VIN = 36V 79 VIN = 75V 77 75 VIN = 48V 0 10 20 30 IOUT (A) 40 50 60 dc2348a F05 Figure 5. DC2348A-A Buck Mode Typical Efficiency vs Load Current dc2348aabf 5 DEMO MANUAL DC2348A-A/DC2348A-B OPTIONAL INDUCTOR DCR CURRENT SENSING Figure 6. DC2348A-B Thermal Image, VHIGH = 75V, VLOW = 12V, IOUT = 30A, Free Air, TA = 25C Figure 7. DC2348A-A Thermal Image, VHIGH = 75V, VLOW = 12V, IOUT = 60A, Free Air, TA = 25C Figure 8. Mode Transition from Buck to Boost dc2348aabf 6 DEMO MANUAL DC2348A-A/DC2348A-B Parts List DC2348A-A ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 10 C1, C14, C15, C16, C19, C53, C54, C55, CAP, 1210 2.2F 10% 100V X7R C61, C75 AVX 12101C225KAT2A 2 2 C2, C60 CAP, 100F 20% 100V ELEC SUN ELECT. 100CE100KXT 3 4 C3, C4, C70, C100 CAP, 33F 20% 80V ELEC PANASONIC EEE-FK1K330P 4 1 C5 CAP, 0603 47pF 10% 50V C0G AVX 06035A470KAT2A 5 2 C6, C9 CAP, 0603 10nF 10% 100V X7R AVX 06031C103KAT2A 6 2 C7, C39, C58 CAP, 0603 100nF 10% 50V X7R AVX 06035C104KAT2A 7 8 C8, C13, C28, C29, C45, C46, C48, C63 CAP, 0603 0.22F 10% 25V X5R AVX 06033D224KAT2A 8 5 C10, C31, C51, C64, C107 CAP, 0805 4.7F 10% 16V X7R AVX 0805YC475KAT2A 9 3 C11, C62, C65 CAP, 0603 100pF 10% 100V NPO AVX 06031A101KAT2A 10 2 C12, C67 CAP, 0603 10pF 10% 100V C0G AVX 06031A100KAT2A 11 6 C18, C23, C59, C71, C105, C106 CAP, 0603 1F 10% 25V X7R MURATA GRM188R71E105KA12D 12 4 C21, C24, C47, C74 CAP, 100F 20% 25V ALUM PANASONIC EEHZA1E101XP 13 4 C22, C25, C66, C72 CAP, 1206 10F 10% 25V X7R MURATA GRM31CR71E106KA12L 14 4 D1, D2, D3, D4 DIODE, SCHOTTKY, RECTIFIER DIODES INC. DFLS1100-7 15 4 L1, L2, L3, L4 IND, 10H WURTH 7443641000 16 8 Q1, Q2, Q3, Q4, Q17, Q20, Q22, Q24 XSTR, MOSFET N-CH 80V 100A TDSON-8 INFINEON BSC117N08NS5 17 8 Q5, Q6, Q7, Q8, Q18, Q19, Q21, Q23 XSTR, MOSFET N-CH 80V 100A TDSON-8 INFINEON BSC040N08NS5 18 2 Q33, Q34 XSTR, SIPMOS, P-CHANNEL VISHAY SUD50P08-25L 19 4 RS1, RS2, RS3, RS4 RES, 2010 0.001 1% 1W VISHAY WSL20101L000FEA18 20 1 R1 RES, 0603 649k 1% 1/10W VISHAY CRCW0603649KFKEA 21 1 R2 RES, 0603 243k 1% 1/10W VISHAY CRCW0603243KFKEA 22 1 R3 RES, 0603 200k 1% 0.1W VISHAY CRCW0603200KFKEA 23 23 R4, R12, R14, R21, R24, R30, R33, R34, R35, R39, R40, R43, R49, R67, R72, R80, R82, R85, R86, R87, R88, R89, R90 RES, 0603 0 JUMPER VISHAY CRCW06030000Z0EA 24 1 R5 RES, 0603 69.8k 1% 0.1W VISHAY CRCW060369K8FKEA 25 1 R6 RES, 0603 12.7k 1% 1/10W VISHAY CRCW060312K7FKEA 26 8 R7, R8, R9, R17, R27, R36, R46, R48 RES, 0603 10k 1% 1/10W VISHAY CRCW060310K0FKEA 27 1 R10 RES, 0603 3.01k 1% 1/10W VISHAY CRCW06033K01FKEA 28 1 R11 RES, 0603 4.53k 1% 1/10W VISHAY CRCW06034K53FKEA 29 2 R13, R47 RES, 0603 20k 1% 1/10W VISHAY CRCW060320K0FKEA 30 1 R15 RES, 0603 110k 1% 1/10W VISHAY CRCW0603110KFKEA 31 1 R16 RES, 0805 499k 1% 1/8W VISHAY CRCW0805499KFKEA 32 1 R18 RES, 0603 100k 5% 1/10W VISHAY CRCW0603100KJNEA 33 1 R22 RES, 0603 90.9k 1% 1/10W VISHAY CRCW060390K9FKEA 34 2 R23, R81 RES, 0603 10 1% 1/10W VISHAY CRCW060310R0FKEA 35 2 R29, R78 RES, 1206 2.2 1% 1/4W VISHAY CRCW12062R20FKEA 36 4 R31, R32, R53, R65 RES, 0603 4.99k 1% 0.1W VISHAY CRCW06034K99FKEA 37 4 R38, R41, R42, R50 RES, 0603 300 1% 0.1W VISHAY CRCW0603300RFKEA 38 2 R44, R51 RES, 0603 34k 1% 0.1W VISHAY CRCW060334K0FKEA dc2348aabf 7 DEMO MANUAL DC2348A-A/DC2348A-B Parts List DC2348A-A ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 39 2 R83, R84 RES, 2512 0 JUMPER VISHAY CRCW25120000Z0EG 40 2 U1, U2 IC, HIGH POWER BiDIRECTIONAL SUPPLY LINEAR TECH LTC3871HLXE#PBF Additional Demo Board Circuit Components 1 0 C20, C27, C73, C76 CAP, ALUM OPTION OPTION 2 0 C30, C32, C33, C34, C35, C92, C93, C98, C99, C101, C102, C103, C104 CAP, 0603 OPTION OPTION 3 0 C88, C89, C90, C91, C94, C95, C96, C97, C108, C109, C110, C111, C112, C113, C114, C115 CAP, 0805 OPTION OPTION 4 0 L1, L2, L3, L4 - ALTERNATE IND, 10H COILCRAFT SER2918H-103 5 0 Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q25, Q26, Q27, Q28, Q29, Q30, Q31, Q32 XSTR, MOSFET OPTION INFINEON IPD60N10S4-12 OPTION 6 0 R19, R20 RES, 0603 OPTION OPTION 7 0 R25, R26, R54, R79 RES, 1206 OPTION OPTION Hardware: For Demo Board Only 1 16 E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, E17 TURRET MIIL-MAX 2501-2-00-80-00-00-07-0 2 3 JP1, JP2, JP6 HEADER, 4PIN, DBL ROW 2mm WURTH ELEKTRONIK 62000821121 3 1 JP3 HEADER, 4PIN, 2mm WURTH ELEKTRONIK 62000411121 4 1 JP4 HEADER, 2mm, 3PIN WURTH ELEKTRONIK 62000311121 6 8 J1, J2, J3, J4, J5, J8, J9, J13 STUD, TESTPIN PEM KFH-032-10 7 8 LUG RING, #10 KEYSTONE 8205 8 16 NUT, BRASS 10-32 ANY #10-32 9 4 STANDOFF, SNAP ON KEYSTONE 8834 10 8 WASHER, #10 TIN PLATED BRASS ANY #10 EXT BZ TN 11 1 S1 SWITCH, SUBMINATURE, SLIDE, SPDT C&K-COMPONENTS JS202011CQN 12 5 XJP1, XJP3, XJP4, XJP6, XJP7 SHUNT, 2mm WURTH ELEKTRONIK 60800213421 MH1, MH2, MH3, MH4 dc2348aabf 8 DEMO MANUAL DC2348A-A/DC2348A-B Parts List DC2348A-B ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 5 C1, C14, C15, C16, C19 CAP, 1210 2.2F 10% 100V X7R AVX 12101C225KAT2A 2 1 C2 CAP, 100F 20% 100V ELEC SUN ELECT. 100CE100KXT 3 2 C3, C4 CAP, 33F 20% 80V ELEC PANASONIC EEE-FK1K330P 4 1 C5 CAP, 0603 47pF 10% 50V C0G AVX 06035A470KAT2A 5 2 C6, C9 CAP, 0603 10nF 10% 100V X7R AVX 06031C103KAT2A 6 2 C7, C39 CAP, 0603 100nF 10% 50V X7R AVX 06035C104KAT2A 7 4 C8, C13, C28, C29 CAP, 0603 0.22F 10% 25V X5R AVX 06033D224KAT2A 8 2 C10, C31 CAP, 0805 4.7F 10% 16V X7R AVX 0805YC475KAT2A 9 1 C11 CAP, 0603 100pF 10% 100V NPO AVX 06031A101KAT2A 10 1 C12 CAP, 0603 10pF 10% 100V C0G AVX 06031A100KAT2A 11 3 C18, C23, C105 CAP, 0603 1F 10% 25V X7R MURATA GRM188R71E105KA12D 12 2 C21, C24 CAP, 100F 20% 25V ALUM PANASONIC EEHZA1E101XP 13 2 C22, C25 CAP, 1206 10F 10% 25V X7R MURATA GRM31CR71E106KA12L 14 2 D1, D2 DIODE, SCHOTTKY, RECTIFIER DIODES INC. DFLS1100-7 15 2 L1, L2 IND, 10H WURTH 7443641000 16 4 Q1, Q2, Q3, Q4 XSTR, MOSFET N-CH 80V 100A TDSON-8 INFINEON BSC117N08NS5 17 4 Q5, Q6, Q7, Q8 XSTR, MOSFET N-CH 80V 100A TDSON-8 INFINEON BSC040N08NS5 18 2 Q33, Q34 XSTR, SIPMOS, P-CHANNEL VISHAY SUD50P08-25L 19 2 RS1, RS2 RES, 2010 0.001 1% 1W VISHAY WSL20101L000FEA18 20 1 R1 RES, 0603 649k 1% 1/10W VISHAY CRCW0603649KFKEA 21 1 R2 RES, 0603 243k 1% 1/10W VISHAY CRCW0603243KFKEA 22 1 R3 RES, 0603 200k 1% 0.1W VISHAY CRCW0603200KFKEA 23 11 R4, R12, R14, R21, R24, R30, RES, 0603 0 JUMPER R33, R34, R35, R39, R40 VISHAY CRCW06030000Z0EA 24 1 R5 RES, 0603 69.8k 1% 0.1W VISHAY CRCW060369K8FKEA 25 1 R6 RES, 0603 12.7k 1% 1/10W VISHAY CRCW060312K7FKEA 26 6 R7, R8, R9, R17, R27, R36 RES, 0603 10k 1% 1/10W VISHAY CRCW060310K0FKEA 27 1 R10 RES, 0603 3.01k 1% 1/10W VISHAY CRCW06033K01FKEA 28 1 R11 RES, 0603 4.53k 1% 1/10W VISHAY CRCW06034K53FKEA 29 1 R13 RES, 0603 20k 1% 1/10W VISHAY CRCW060320K0FKEA 30 1 R15 RES, 0603 110k 1% 1/10W VISHAY CRCW0603110KFKEA 31 1 R16 RES, 0805 499k 1% 1/8W VISHAY CRCW0805499KFKEA 32 1 R18 RES, 0603 100k 5% 1/10W VISHAY CRCW0603100KJNEA 33 1 R22 RES, 0603 90.9k 1% 1/10W VISHAY CRCW060390K9FKEA 34 1 R23 RES, 0603 10 1% 1/10W VISHAY CRCW060310R0FKEA 35 1 R29 RES. 1206 2.2 1% 1/4W VISHAY CRCW12062R20FKEA 36 2 R31, R32 RES, 0603 4.99k 1% 0.1W VISHAY CRCW06034K99FKEA 37 1 R44 RES, 0603 34k 1% 0.1W VISHAY CRCW060334K0FKEA 38 2 R38, R41 RES, 0603 300 1% 0.1W VISHAY CRCW0603300RFKEA 39 2 R83, R84 RES, 2512 0 JUMPER VISHAY CRCW25120000Z0EG 40 1 U1 IC, HIGH POWER BiDIRECTIONAL SUPPLY LINEAR TECH LTC3871HLXE#PBF dc2348aabf 9 DEMO MANUAL DC2348A-A/DC2348A-B Parts List DC2348A-B ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Demo Board Circuit Components 1 0 C20, C27 CAP, ALUM OPTION OPTION 2 0 C30, C32, C33, C92, C93, C101, C102 CAP, 0603 OPTION OPTION 3 0 C88, C89, C90, C91, C108, C109, C110, C111 CAP, 0805 OPTION OPTION 4 0 L1, L2 - ALTERNATE IND, 10H COILCRAFT SER2918H-103 5 0 Q9, Q10, Q11, Q12, Q13, Q14, XSTR, MOSFET OPTION Q15, Q16 INFINEON IPD60N10S4-12 OPTION 6 0 R19, R20 RES, 0603 OPTION OPTION 7 0 R25, R26 RES, 1206 OPTION OPTION 8 1 S1 SWITCH, SUBMINATURE, SLIDE, SPDT C&K-COMPONENTS JS202011CQN 9 4 XJP1, XJP4, XJP6, XJP7 SHUNT, 2mm WURTH ELEKTRONIK 60800213421 Hardware: For Demo Board Only 1 13 E1, E2, E3, E4, E5, E8, E9, E10, E11, E12, E13, E14, E15 TURRET MIIL-MAX 2501-2-00-80-00-00-07-0 2 2 JP1, JP2 HEADER, 4PIN, DBL ROW 2mm WURTH ELEKTRONIK 62000821121 3 1 JP3 HEADER, 4PIN, 2mm WURTH ELEKTRONIK 62000411121 4 1 JP4 HEADER, 2mm, 3PIN WURTH ELEKTRONIK 62000311121 5 5 J1, J2, J3, J4, J5 STUD, TESTPIN PEM KFH-032-10 6 5 LUG RING, #10 KEYSTONE 8205 7 10 NUT, BRASS 10-32 ANY #10-32 8 5 WASHER, #10 TIN PLATED BRASS ANY #10 EXT BZ TN 9 4 STANDOFF, SNAP ON KEYSTONE 8834 MH1, MH2, MH3, MH4 dc2348aabf 10 1 2 3 4 P.S. MODE DRVSET FAULT FAULT_ RUN1 RUN RUN2 E9 E8 E4 BUCK BUCK/BOOST SETCUR IMON1 E2 IMON1 E5 SETCUR OVOUT E3 CLKOUT E10 CLKOUT1 SYNC FCM R10 JP3 A 5 3 7 3 2 4 1 ILIM 47pF 1 V5 C5 C6 10nF 3.01k 1% R35 0 MODE BUCK P.S. ILIM SS2 ITHO2 ITHIN2 UVIN OVIN JP1 ILIM 8 1% 20k 5 BOOST 2 6 8 5 7 0 R24 OFF ON R5 69.8K 1% R3 200K 1% 4 3 JP2 2 PHASE1 1 V5 S1 V5 1% 10k R17 R13 1% 10k R7 BUCK 6 ILIM 4 2 V5 V5 JP4 B 3 2 1 C12 10pF 1% 10k R9 1% R15 110k VOUT 10nF C9 R33 0 RUN R11 C11 100pF R1 1% 649k R18 100K C7 100nF 4.53k1% R34 0 10k 1% 1% 243k R8 V5 3 1 SS R19 OPT OPT R20 V5 20 FAULT_ 19 18 RUN1 12 SETCUR 16 11 IMON1 BUCK 10 41 42 43 44 17 OVOUT 34k 1% MODE R44 ILIM 45 ITHO PHMD1 4 ITHIN 10k 1% R36 UVIN OVIN DRVSET FAULT_ RUN BUCK SETCUR IMON OVLOW CLKOUT SYNC FREQ MODE ILIM PHSMD SS ITHLOW ITHHIGH PHMD V5 180 180 120 90 45 240 0 0 0 FLOAT 3/4 V5 V5 C 180 180 CH2 60 60 CLKOUT 90 0 CLKIN C31 4.7uF 16V 0805 BG2 TG2 SW2 BST2 SNSA2+ SNSD2+ SNS2- VFBHIGH BG1 TG1 SW1 BST1 SNSA1+ SNSD1+ SNS1- VFBLOW Q33 VIN SAC1 48 TG1 BG1 FBIN VOUT SDC2 SAC2 39 36 5 14 15 13 D2 4 Q2 BSC117N08NS5 4 2.2uF C14 VIN R32 4.99K 1% D THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE Q5 BSC040N08NS5 BSC117N08NS5 Q1 4 1% R31 4.99K APPROVALS 7443641000 L2 10uH OPT 1206 R25 SAC2 SDC2 BSC040N08NS5 Q6 SCALE = NONE R39 0 L1 10uH R26 OPT 1206 C1 2.2uF 100V 1210 C33 R41 300 1% 0.22uF C28 7443641000 + C29 0.22uF 2512 C32 + C24 + C20 + OPT C30 C21 + VOUT 1% 10k R27 DATE: VHIGH VHIGH J5 J4 SW2 TG2 BG2 VLOW FBO2 VO SW1 BG1 TG1 GND VLOW VLOW EXTVCC E Tuesday, June 28, 2016 SHEET 1 3 OF 3 REV. LTC Confidential-For Customer Use Only 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com 1uF C18 GND GND EXTVCC J2 J3 E13 E1 E12 HIGH POWER POLY-PHASE BI-DIRECTIONAL SUPPLY/CHARGER IC NO. LTC3871HLXE#PBF N/A PCB NO. DEMO CIRCUIT 2348A-A SIZE J1 30V UP TO 75V E11 FBOUT R21 0 100uF 90.9k 1% R22 1uF C23 VOUT VINP OPT 100uF C27 E TECHNOLOGY Fax: (408)434-0507 10uF C22 10 1% R23 10uF C25 RS1 1m OPT OPT R84 0 2512 R83 0 R38 300 1% TITLE: SCHEMATIC R40 OPT 0 RS2 1m C2 100uF 100V Q3 SW1 BSC117N08NS5 4 C3 + 33uF 80V VIN SAC1 SDC1 C4 + 33uF 80V VIN 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 4 C16 2.2uF 100V VIN 4 C19 2.2uF 100V Q4 D BSC117N08NS5 4 2.2uF C15 SUD50P08-25L 3 4 Q8 BSC040N08NS5 DRVCC DFLS1100 FBIN C13 0.22uF 0.22uF Q34 C105 1uF DRVCC DFLS1100 Q7 BSC040N08NS5 BG2 TG2 22 25 SW2 23 24 R14 0 SW1 38 C8 SDC1 D1 VOUT 46 37 FBOUT 2 R12 0 EXTVCC R30 0 VOUT 2 VINP SUD50P08-25L 3 47 27 PGATE 2 VINP EXTVCC 100nF C39 1% 1206 LTC3871HLXE U1 2.2 R29 VIN 1/4 V5 GND C10 0805 4.7uF 8 GND E15 4 1 6 3 9 E14 26 VIN DRVCC DRVCC29 UVHIGH NC NC NC NC NC 21 30 32 34 40 6 V5 PGND2 1 R2 PGND1 35 VIN SGND 7 OVHIGH 31 VHIGH 33 PGATE C 5 SGND 28 1 VINP 5 B 5 1 2 3 1 2 3 5 5 1 2 3 5 1 2 3 5 1 2 3 1 2 3 5 1 2 3 1 2 3 A 1 2 3 4 DEMO MANUAL DC2348A-A/DC2348A-B Schematic Diagram dc2348aabf 11 1 2 3 4 UVIN E7 DRVSET FAULT_ RUN2 BUCK SETCUR IMON1 OVOUT E6 IMON2 CLKOUT2 CLKOUT MODE ILIM SS2 ITHO2 ITHIN2 A R82 0 R87 0 R48 4 6 8 3 5 7 R90 0 R89 0 R88 0 R80 0 10k 1% R46 20k JP6 2 1 PHASE2 1% V5_2 R47 10k 1% V5_2 R86 0 R85 0 B C67 10pF C65 100pF 34k R51 IMON2 1% PHMD2 C62 100pF 20 19 18 16 12 11 10 41 42 43 44 17 45 1 3 4 DRVSET FAULT_ RUN BUCK SETCUR IMON OVLOW CLKOUT SYNC FREQ MODE ILIM PHSMD SS ITHLOW ITHHIGH 9 0805 4.7uF V5_2 U2 LTC3871HLXE 21 30 NC 32 NC 34 NC 40 NC NC UVHIGH 8 OVHIGH 6 V5 C51 4.7uF 16V 0805 26 DRVCC DRVCC2 29 R78 C BG2 TG2 SW2 BST2 SNSA2+ SNSD2+ SNS2- VFBHIGH BG1 TG1 SW1 BST1 SNSA1+ SNSD1+ SNS1- VFBLOW SDC102 SAC102 48 BG201 36 SAC202 13 SW202 TG202 BG202 23 22 25 R72 0 SDC202 15 24 VOUT 5 14 DRVCC2 FBIN2 DFLS1100 D3 4 C55 2.2uF 100V 4 Q23 4 Q20 4 VIN VIN Q17 1% R65 4.99K 7443641000 D THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C45 0.22uF R50 300 1% C66 + C47 0805 4.7uF + 100uF C74 + OPT C76 OPT 100uF C73 R81 C107 10 1% E + C59 1uF VOUT 1uF C71 VOUT GND VLOW GND SW202 BG202 TG202 E17 SW201 BG201 TG201 J13 J9 VLOW 12V / J8 VO FBO2 EXTVCC DATE: SIZE E Tuesday, June 28, 2016 SHEET 2 HIGH POWER POLY-PHASE BI-DIRECTIONAL SUPPLY/CHARGER IC NO. LTC3871HLXE#PBF N/A PCB NO. DEMO CIRCUIT 2348A-A 3 OF 3 REV. LTC Confidential-For Customer Use Only 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com TECHNOLOGY Fax: (408)434-0507 10uF TITLE: SCHEMATIC RS4 1m OPT 10uF C72 RS3 1m OPT C34 R42 300 1% C48 0.22uF C35 SDC202 APPROVALS Q21 BSC040N08NS5 BSC117N08NS5 R43 0 7443641000 R49 0 L4 10uH OPT 1206 R54 SAC202 1206 R79 OPT 10uH L3 BSC040N08NS5 Q19 BSC117N08NS5 R53 4.99K 1% BSC040N08NS5 CUSTOMER NOTICE Q18 BSC040N08NS5 4 C54 2.2uF 100V 4 SAC102 SDC102 D SW201 BSC117N08NS5 Q24 4 2.2uF C75 Q22 SW202 BSC117N08NS5 4 C61 2.2uF D4 DRVCC2 C63 0.22uF DFLS1100 SW201 0.22uF TG201 39 38 37 R67 0C46 VOUT 47 EXTVCC 1uF C106 VIN 46 2 27 1% 2.2 EXTVCC 100nF C58 C 33 C64 VHIGH 31 PGND2 PGATE SGND 7 PGND1 35 5 1 2 3 5 1 2 3 OVIN B 5 1 2 3 SGND 28 5 1 2 3 5 5 1 2 3 5 1 2 3 5 1 2 3 12 1 2 3 A 1 2 3 4 DEMO MANUAL DC2348A-A/DC2348A-B Schematic Diagram dc2348aabf 1 2 3 4 A BG201 SW201 TG201 BG1 SW1 TG1 BG201 Q31 OPT 1 SW1 R16 Q30 OPT 1 0805 499k 1% Q29 OPT 1 Q14 OPT 1 Q13 OPT 1 SW201 VIN TG201 Q32 OPT 1 Q15 OPT 1 BG1 TG1 Q16 OPT 1 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 R6 1% 12.7k FBIN BG202 SW202 TG202 BG2 SW2 TG2 0 R4 B 2 Q27 OPT 1 BG202 TG202 Q26 OPT 1 Q11 OPT 1 BG2 TG2 Q10 OPT 1 B Q25 OPT 1 Q28 OPT 1 Q9 OPT 1 SW202 SW2 Q12 OPT 1 VIN FBIN2 FBIN 2 3 2 3 3 2 3 2 3 2 3 2 3 2 3 A C60 100uF 100V C90 + C91 + OPT 0805 C97 OPT 0805 C100 33uF 80V OPT 0805 C96 OPT 0805 C THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE C53 2.2uF 100V 1210 + OPT 0805 OPT 0805 VINP C95 C94 VIN C89 OPT 0805 C88 OPT 0805 VIN OPT C99 OPT C93 D D SCALE = NONE OPT C104 OPT C102 C108 OPT 0805 C112 OPT 0805 C109 C110 OPT 0805 C114 OPT 0805 C111 DATE: Tuesday, June 28, 2016 E SHEET 3 3 OF 3 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only OPT 0805 C115 OPT 0805 TECHNOLOGY OPT 0805 C113 OPT 0805 E HIGH POWER POLY-PHASE BI-DIRECTIONAL SUPPLY/CHARGER IC NO. SIZE LTC3871HLXE#PBF N/A DEMO CIRCUIT 2348A-A TITLE: SCHEMATIC OPT C103 OPT C101 APPROVALS C70 33uF 80V OPT C98 OPT C92 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C 1 2 3 4 DEMO MANUAL DC2348A-A/DC2348A-B Schematic Diagram dc2348aabf 13 1 2 3 4 P.S. MODE DRVSET FAULT FAULT_ RUN1 RUN RUN2 E9 E8 E4 BUCK BUCK/BOOST SETCUR IMON1 E2 IMON1 E5 SETCUR OVOUT E3 CLKOUT E10 CLKOUT1 SYNC FCM R10 JP3 A 5 3 7 3 2 4 1 ILIM 47pF 1 V5 C5 C6 10nF 3.01k 1% R35 0 MODE BUCK P.S. ILIM SS2 ITHO2 ITHIN2 UVIN OVIN GND E15 JP1 ILIM 8 6 4 2 V5 1% 20k 5 BOOST 2 6 8 5 7 R24 0 OFF ON R5 69.8K 1% R3 200K 1% 4 3 JP2 2 PHASE1 1 V5 S1 V5 1% 10k R17 R13 1% 10k R7 BUCK V5 JP4 B 3 2 1 C12 10pF 1% 10k R9 1% R15 110k VOUT 10nF C9 R33 0 RUN R11 C11 100pF 1% 649k R18 100K C7 100nF 4.53k1% R34 0 10k 1% 1% 243k R8 V5 3 1 SS R19 OPT OPT R20 V5 20 FAULT_ 19 18 RUN1 12 SETCUR 16 11 IMON1 BUCK 10 41 42 43 44 17 OVOUT 34k 1% MODE R44 ILIM 45 ITHO PHMD1 4 ITHIN 10k 1% R36 UVIN OVIN DRVSET FAULT_ RUN BUCK SETCUR IMON OVLOW CLKOUT SYNC FREQ MODE ILIM PHSMD SS ITHLOW ITHHIGH PHMD V5 CH2 180 180 120 90 45 240 0 0 0 FLOAT 3/4 V5 V5 C 180 180 60 60 CLKOUT 90 0 CLKIN C31 4.7uF 16V 0805 BG2 TG2 SW2 BST2 SNSA2+ SNSD2+ SNS2- VFBHIGH BG1 TG1 SW1 BST1 SNSA1+ SNSD1+ SNS1- VFBLOW Q33 VIN SAC1 48 TG1 BG1 FBIN VOUT SDC2 SAC2 39 36 5 14 15 13 D2 4 Q2 BSC117N08NS5 4 2.2uF C14 VIN R32 4.99K 1% D THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE Q5 BSC040N08NS5 BSC117N08NS5 Q1 4 1% 4.99K R31 APPROVALS 7443641000 L2 10uH OPT 1206 R25 SAC2 SDC2 BSC040N08NS5 Q6 SCALE = NONE R39 0 L1 10uH R26 OPT 1206 C1 2.2uF 100V 1210 C33 R41 300 1% 0.22uF C28 7443641000 + C29 0.22uF 2512 C32 + C24 + C20 + OPT C30 C21 + VOUT 1% 10k R27 DATE: VHIGH VHIGH J5 J4 SW2 TG2 BG2 VLOW FBO2 VO SW1 BG1 TG1 GND VLOW VLOW EXTVCC E Tuesday, June 28, 2016 SHEET 1 3 OF 2 REV. LTC Confidential-For Customer Use Only 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com 1uF C18 GND GND EXTVCC J2 J3 E13 E1 E12 HIGH POWER POLY-PHASE BI-DIRECTIONAL SUPPLY/CHARGER IC NO. LTC3871HLXE#PBF N/A PCB NO. DEMO CIRCUIT 2348A-B SIZE J1 30V UP TO 75V E11 FBOUT R21 0 100uF 90.9k 1% R22 1uF C23 VOUT VINP OPT 100uF C27 E TECHNOLOGY Fax: (408)434-0507 10uF C22 10 1% R23 10uF C25 RS1 1m OPT OPT R84 0 2512 R83 0 R38 300 1% TITLE: SCHEMATIC R40 OPT 0 RS2 1m C2 100uF 100V Q3 SW1 BSC117N08NS5 4 C3 + 33uF 80V VIN SAC1 SDC1 C4 + 33uF 80V VIN 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 4 C16 2.2uF 100V VIN 4 C19 2.2uF 100V Q4 D BSC117N08NS5 4 2.2uF C15 SUD50P08-25L 3 4 Q8 BSC040N08NS5 DRVCC DFLS1100 FBIN C13 0.22uF 0.22uF Q34 C105 1uF DRVCC DFLS1100 Q7 BSC040N08NS5 BG2 TG2 22 25 SW2 23 24 R14 0 SW1 38 C8 SDC1 D1 VOUT 46 37 FBOUT 2 R12 0 EXTVCC R30 0 VOUT 2 VINP SUD50P08-25L 3 47 27 PGATE 2 VINP EXTVCC 100nF C39 1% 1206 LTC3871HLXE U1 2.2 R29 VIN 1/4 V5 GND C10 0805 4.7uF 8 E14 9 R1 26 VIN 4 1 6 3 6 DRVCC DRVCC29 UVHIGH 21 30 NC 32 NC 34 NC 40 NC NC V5 PGND2 1 R2 SGND 7 VIN PGND1 35 OVHIGH 31 VHIGH 33 PGATE C 5 SGND 28 1 VINP 5 B 5 1 2 3 1 2 3 5 5 1 2 3 5 1 2 3 5 1 2 3 1 2 3 5 1 2 3 14 1 2 3 A 1 2 3 4 DEMO MANUAL DC2348A-A/DC2348A-B Schematic Diagram dc2348aabf 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. 1 2 3 4 BG1 SW1 TG1 A Q15 OPT 1 BG1 TG1 Q16 OPT 1 2 3 2 3 SW1 Q14 OPT 1 Q13 OPT 1 0805 499k 1% R16 2 3 2 3 R6 1% 12.7k FBIN BG2 SW2 TG2 0 R4 B Q11 OPT 1 BG2 TG2 Q10 OPT 1 B 2 3 2 3 SW2 Q9 OPT 1 Q12 OPT 1 VIN FBIN2 FBIN 2 3 2 3 A C90 OPT 0805 C91 OPT 0805 C THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE C89 OPT 0805 C88 OPT 0805 VIN OPT C93 D D SCALE = NONE OPT C102 C108 OPT 0805 C109 C110 OPT 0805 C111 DATE: Tuesday, June 28, 2016 E SHEET 2 3 OF 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only OPT 0805 TECHNOLOGY OPT 0805 E HIGH POWER POLY-PHASE BI-DIRECTIONAL SUPPLY/CHARGER IC NO. SIZE LTC3871HLXE#PBF N/A DEMO CIRCUIT 2348A-B TITLE: SCHEMATIC OPT C101 APPROVALS OPT C92 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C 1 2 3 4 DEMO MANUAL DC2348A-A/DC2348A-B Schematic Diagram dc2348aabf 15 DEMO MANUAL DC2348A-A/DC2348A-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 dc2348aabf 16 Linear Technology Corporation LT 0816 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2016