DEMO MANUAL DC1721A-A LTC4000EGN/LTC3789EGN 14.6V, 5A Battery Charger with 6VIN to 36VIN Buck-Boost Converter DESCRIPTION Demonstration circuit 1721A-A is a 14.6V, 5A battery charger and PowerPath™ manager with 6VIN to 36VIN buck-boost converter featuring the LTC®4000/LTC3789, targeted at 4-cell LiFePO4 applications. The output of this demo board was specifically tailored for a Tenergy 10Ahour battery, P/N 30207. Other voltages can be set by changing ROFB2 and RBFB2. The desired nominal voltage can be accurately trimmed by using trim resistors R42 and R43. For example, for 14.4V battery float voltage, change ROFB2 and RBFB2 to 86.6k, and add 7.5M at R42 and R43 for greater set point accuracy. intelligent PowerPath manager, and power supply. It operates at 400kHz and produces a regulated 5A/14.6V battery charger output as well as a system output of up to 6.25A from an input voltage range of 6V to 36V: suitable for a wide variety of portable applications including instruments, industrial equipment, power tools, and computers. It has a total footprint area of 12.4cm2 (3.6cm2 for the LTC4000 circuit only). Synchronous rectification helps to attain efficiency exceeding 96% at full load and nominal input. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these parts in a buck-boost converter battery charger, L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. PERFORMANCE SUMMARY SYMBOL PARAMETER VIN Input Supply Range IIN Input Current Limit VFLOAT Battery Float Voltage Output Regulation Design files for this circuit board are available at http://www.linear.com/demo (TA = 25°C) CONDITIONS MIN TYP 6 MAX 36 11 14.4 Line and Load (6V to 36V, 0A to 5A) IBAT Battery Charge Current VOUT_SYS System Output Voltage IOUT_SYS System Output Current Range fSW Switching (Clock) Frequency VOUT_SYS_P-P System Output Ripple POUT/PIN System Output Efficiency (See Figure 3) VIN =24V, IOUT_SYS = 5A Approximate Size Component Area × Top Component Height 14.6 0 VIN = 24V, IOUT_SYS = 5A (20MHz BW) V % 5 14.6 V A 14.8 ±0.05 12.3 UNITS A 15.5 6.25 V A 400 kHz 50 mVP-P 96.5 % 12.4cm2 × 0.40cm dc1721aaf 1 DEMO MANUAL DC1721A-A QUICK START PROCEDURE Demonstration circuit 1721 is easy to set up to evaluate the performance of the LTC4000/LTC3789. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: WARNING: BATTERIES ARE POTENTIALLY DANGEROUS HIGH ENERGY SOURCES. IMPROPER CONNECTION, OVERCHARGE, OR RAPID DISCHARGE COULD RESULT IN EXPLOSION AND/OR FIRE. NOTE: When measuring the output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor as shown in Figure 1. 1. Connect a low ESR electrolytic capacitor to the BAT output (≥1800μF at ≥20V). NOTE: This capacitor helps simulate the low impedance of a battery and maintain stability of the charge current loop. It is only needed for test purposes with electronic or resistive loads, and not needed in the actual application (where the load is a battery). 2. Set MODE jumper to CCM. Set CHARGE jumper to DISABLE. 3. Set an input power supply that is capable of 6V to 36V and 12A to 24V. Then turn off the supply. 4. With power off, connect the supply to the input terminals VIN and GND. NOTE: a. Input voltages lower than 6V can keep the converter from turning on due to the undervoltage lockout feature of the LTC4000. b. If efficiency measurements are desired, refer to Figure 1 for test setup. 5. Turn on the power at the input. NOTE: Make sure that the input voltage never exceeds 36V. 6. Check for the proper VOUT_SYS of 15.3V. Turn off the power at the input. 7. Once the proper output voltages are established, connect a variable load capable of sinking 7A at 16V to the output terminals VOUT_SYS and GND. Set the current for 0A. 8. Turn on the power at the input. NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 9. Once the proper VOUT_SYS is again established, adjust the load and/or source within the operating range and observe the output voltage regulation, ripple voltage, efficiency, input and output current limit, and other desired parameters. 10. Turn off the power at the input. 11. Connect the output load and meters to the BAT output. 12. Set CHARGE jumper to ENABLE. 13. Turn on the power at the input. 14. Once the proper VOUT_SYS is again established, adjust the load and/or source within the operating range and observe the battery float voltage regulation and other desired parameters. 15. Set the load to constant voltage mode to more easily observe charge current and trickle charge current. NOTE: Operation in the instant-on region (VOUT < 12.5V) may engage thermal limit circuit to protect Q7 in linear region. NOTE: The optional thermal limit circuit for Q6 (Q9, RNTC3, R55-R59, and U4) is included to protect Q6 in case of an extended short-circuit on VOUT_SYS under adverse thermal conditions (TA > 40°C). It may not be needed in applications with less severe thermal conditions, lower current available to VOUT_SYS, or where continuous short circuit protection on VOUT_SYS is not required. dc1721aaf 2 DEMO MANUAL DC1721A-A QUICK START PROCEDURE Figure 1. Proper Measurement Equipment Setup Figure 2. Proper Noise Measurement Setup dc1721aaf 3 DEMO MANUAL DC1721A-A QUICK START PROCEDURE 100 EFFICIENCY (%) 95 90 85 80 0.5 VIN = 6V VIN = 15V VIN = 24V VIN = 36V 1.5 2.5 3.5 IOUT (A) 4.5 5.5 dc1721aa F03 Figure 3. Efficiency from VIN to VOUT_SYS LTC4000 / LTC3789 SYSTEM BLOCK DIAGRAM VIN Rsense-input VOUT-SYS LTC3789 DC - DC CONVERTER + + Rsense-charge ITH BAT CC1 RC1 CC2 10nF Gm A10 LTC4000 A9 GND NOT ON THE BOARD Gm A5 Gm A8 Gm A4 A7 Gm A6 Figure 4. Block Diagram dc1721aaf 4 DEMO MANUAL DC1721A-A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 2 CL, CBAT Capacitor, X5R, 2.2μF, 25V, 20%, 0805 AVX, 08053D225MAT2A 2 2 C24, CBIAS Capacitor, X7R, 1μF, 16V, 10%, 0603 AVX, 0603YC105KAT2A 3 3 CC2, C14, CTMR Capacitor, X7R, 0.1μF, 50V, 10%, 0603 AVX, 06035C104KAT2A 4 3 CIIMON, CIBMON, C19 Capacitor, C0G, 1000pF, 25V, 5%, 0603 AVX, 06033A102JAT2A 5 2 C15, CIN Capacitor, X7R, 1μF, 50V, 10%, 1210 AVX, 12105C105KAT2A 6 2 CIN1, CIN2 Capacitor, Alum, HVH, 56μF, 50V Sun Electronics, 50HVH56M 7 2 COUT1, COUT2 Capacitor, OS-CON, 150μF, 20V, 20% Sanyo, 20SVP150M 8 1 CSS Capacitor, X7R, 0.022μF, 50V, 10%, 0603 AVX, 06035C223KAT2A 9 4 C1, C2, C16, C17 Capacitor, X5R, 22μF, 25V, 10%, 1210 AVX, 12103D226KAT2A 10 2 C4, C22 Capacitor, X7R, 0.22μF, 16V, 10%, 0603 Taiyo Yuden, EMK107BJ224KA 11 4 C5, C6, C9, C25 Capacitor, X7R, 3.3μF, 50V, 10%, 1210 AVX, 12105C335KAT2A 12 1 C10 Capacitor, X5R, 2.2μF, 6.3V, 20%, 0603 AVX, 06036D225MAT2A 13 1 C12 Capacitor, NPO, 390pF, 100V, 5%, 1206 AVX, 12061A391JAT2A 14 1 C13 Capacitor, NPO, 1.8nF, 100V, 5%, 1206 AVX, 12061A182JAT2A 15 1 C18 Capacitor, X7R, 10μF, 10V, 10%, 1206 AVX, 1206ZC106KAT2A 16 1 C33 Capacitor, X5R, 4.7μF, 10V, 20%, 0603 AVX, 0603ZD475MAT2A 17 2 C34, C35 Capacitor, X7R, 10nF, 25V, 5%, 0603 AVX, 06033C103JAT2A 18 1 D2 Diode, Switch, 75V, 350mW, SOT23-3 Diode Inc., BAS16-7-F 19 2 D4, D7 Diode, Schottky, 1A, 60V, POWERDI123 Diode Inc., DFLS160-7 20 2 D5, D6 Diode, Schottky, 40V, 2A, SMA Diode Inc., B240A-13-F 21 1 D9 Diode, Zener, SM, BZT52C3V0, SOD323 Diodes, BZT52C3V0 22 1 D10 Diode, Zener, 5.6V, 500mW, SOD123 Diode Inc., BZT52C5V6 23 1 F1 FUSE, 6.3A 32V, T-Lag, 1206, SMD Cooper Bussman, 3216TD6.3-R 24 1 LED2 LED, Dual Red/Green LiteOn, LTST-C155KGJRKT 25 1 L1 Inductor, 4.7μH Toko, FDA1254-4R7M 26 2 Q2, Q4 MOSFET N-Channel, 40V, POWERPAK-8 Vishay, SiR422DP-T1-GE3 27 2 Q3, Q5 MOSFET N-Channel, 20V, POWERPAK-8 Vishay, SiR496DP-T1-GE3 28 2 Q6, Q7 MOSFET P-Channel, 30V, 1206-8 ChipFET Vishay, Si7135DP 29 1 Q8 Small Signal MOSFET On Semi, 2N7002LT1G 30 3 ROFB1, RBFB1, R45 Resistor, Chip, 1M, 0.1W, 1%, 0603 Vishay, CRCW06031M00FKEA 31 2 ROFB2, RBFB2 Resistor, Chip, 84.5k, 0.1W, 1%, 0603 Vishay, CRCW060384K5FKEA 32 1 RCL Resistor, Chip, 24k, 0.1W, 5%, 0603 Vishay, CRCW060324KJKEA 33 1 RIL Resistor, Chip, 18.2k, 0.1W, 1%, 0603 Vishay, CRCW060318K2FKEA 34 1 RCS Sensor Resistor, 0.01Ω, 1W, 2%, 1508 SMD Susumu, RL3720WT-R010-G dc1721aaf 5 DEMO MANUAL DC1721A-A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 35 5 R24, R48, R60, RCX, RVM2 Resistor, Chip, 10k, 0.1W, 1%, 0603 Yageo, RC0603FR-0710KL 36 1 RC1 Resistor, Chip, 14.7k, 0.1W, 1%, 0603 Yageo, RC0603FR-0714K7L 37 1 RFB1 Resistor, Chip, 154k, 0.1W, 1%, 0603 Vishay, CRCW0603154KFKEA 38 1 RFB2 Resistor, Chip, 8.06k, 0.1W, 1%, 0603 Vishay, CRCW06038K06FKEA 39 1 RVM1 Resistor, Chip, 36.5k, 0.1W, 1%, 0603 Vishay, CRCW060336K5FKEA 40 2 R7, R49 Resistor, Chip, 100k, 0.1W, 1%, 0603 Vishay, CRCW0603100KFKEA 41 1 RNTC2 Thermistor, NTC, 10kΩ, 5%, 0603 Vishay, NTHS0603N02N1002J 42 1 R1 Resistor, Chip, 5.6Ω, 0.1W, 5%, 0603 Vishay, CRCW06035R60JNEA 43 4 R3, R4, R13, R14 Resistor, Chip, 100Ω, 0.1W, 5%, 0603 Vishay, CRCW0603100RJNEA 44 1 R5 Resistor, Chip, 15Ω, 0.125W, 5%, 0805 Vishay, CRCW080515R0JNEA 45 2 R8, R11 Resistor, Chip, 100Ω, 0.1W, 5%, 0603 Vishay, CRCW060310R0JNEA 46 2 R9, R10 Resistor, Chip, 1.24k, 0.1W, 1%, 0603 Vishay, CRCW06031K24FKEA 47 2 R2, R18 Sensor Resistor, 0.008Ω, 1W, 2%, 1508, SMD Susumu, RL3720WT-R008-G 48 1 R20 Sensor Resistor, 0.004Ω, 1W, 2%, 1508, SMD Susumu, RL3720WT-R004-G 49 1 R21 Resistor, Chip, 121k, 0.1W, 1%, 0603 Vishay, CRCW0603121KFKEA 50 4 R25, R51, R52, R54 Resistor, 0Ω, 1/16W, 1A, 0603 Yageo, RC0603FR-070RL 51 1 R28 Resistor, Chip, 5.6Ω, 5%, 1206 Vishay, CRCW12065R60JNEA 52 1 R29 Resistor, Chip, 3.6Ω, 5%, 1206 Yageo, RC1206JR-073R6L 53 1 R44 Resistor, Chip, 38.3k, 0.1W, 1%, 0603 Vishay, CRCW060338K3FKEA 54 1 R46 Resistor, Chip, 2.2k, 0.1W, 5%, 0603 Vishay, CRCW06032K2JKEA 55 1 R47 Resistor, Chip, 4.7k, 0.1W, 5%, 0603 Vishay, CRCW06034K7JKEA 56 1 R50 Resistor, Chip, 20k, 0.1W, 1%, 0603 Vishay, CRCW060320K0FKEA 57 1 U1 IC,Voltage Regulator Linear Technology, LTC3789EGN#PBF 58 1 U2 IC, LTC4000EGN, 28-Pin SSOP Linear Technology, LTC4000EGN#PBF 59 1 U3 NANOPWR Comparator, MSOP8 Linear Technology, LTC1540CMS8#PBF dc1721aaf 6 DEMO MANUAL DC1721A-A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Circuit Components 1 0 CF1, CC1, R6, C7, C8, C11, OPT, 0603 R12, R22, R27, R30, R38, R39, R40, R41, R53, R61, CNTC, CF, CCX 2 0 CIN3, CIN4 OPT 3 0 C3, C23, C26, C27 OPT, 1210 4 0 D8, D11 OPT 5 1 Q9 Small Signal MOSFET 6 0 Q10 OPT 7 1 RNTC3 Thermistor, NTC, 10kΩ, 5%, 0603 8 0 R42, R43 OPT On Semi, 2N7002LT1G Vishay, NTHS0603N02N1002J 9 1 R55 Resistor, Chip, 10k, 0.1W, 1%, 0603 Yageo, RC0603FR-0710KL 10 1 R56 Resistor, Chip, 68.1k, 0.1W, 1%, 0603 Vishay, CRCW060368K1FKEA 11 1 R57 Resistor, Chip, 20k, 0.1W, 1%, 0603 Vishay, CRCW060320K0FKEA 12 1 R58 Resistor, Chip, 38.3k, 0.1W, 1%, 0603 Vishay, CRCW060338K3FKEA 13 1 R59 Resistor, Chip, 1M, 0.1W, 1%, 0603 Vishay, CRCW06031M00FKEA 14 1 U4 NANOPWR Comparator, MSOP8 Linear Technology, LTC1540CMS8#PBF Hardware/Components (For Demo Board Only) 1 6 E1, E2, E15, E17, E18, E20 Testpoint, Turret, 0.061" pbf Mill-Max, 2308-2-00-80-00-00-07-0 2 12 E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14 Testpoint, Turret, 0.094" pbf Mill-Max, 2501-2-00-80-00-00-07-0 3 2 JP1, JP2 Header, 3-Pin, 0.079 Single Row Samtec, TMM-103-02-L-S 4 2 XJP1, XJP2 Shunt, 0.079" Center Samtec, 2SN-BK-G 5 5 J1, J2, J3, J4, J5 Connector, Banana Jack Keystone, 575-4 6 4 (STAND-OFF) Stand-Off, Nylon 0.25" Keystone, 8831 (Snap On) dc1721aaf 7 A B C R57 20K R56 68.1K R59 1.00M R58 38.3K 6 5 4 3 6 REF HYST IN- IN+ E12 E13 JP1 2 + - 5 IN CLN RST D9 BZX84C3V0 23 22 26 ITH OUT 8 1 U4 LTC1540CMS8 RVM2 10K CIN 1uF 50V 1210 VIN OPTIONAL THERMAL PROTECTION FOR Q6 DURING VOUT-SYS SHORT CIRCUIT RNTC3 10K R55 10K BIAS FLT CHRG DISABLE ENABLE CHARGE BIAS RVM1 36.5K R20 FROM PAGE 2 VIN+ VIN+ RUN 20 CC2 0.1uF RC1 CC1 OPT 14.7K R52 0 R54 0 IL 2 1 Q9 2N7002L R51 0 R53 OPT VOUT 7 6 5 8 Q6 Si7135DP R50 20K R49 100K U2 ROFB1 1.00M ROFB2 84.5K R43 OPT RCS 10m R45 1.00M R44 38.3K 6 5 4 3 R47 4.7K R46 2.2K 4 3 6 REF HYST IN- IN+ CIIMON 1000pF TMR RED GRN + - 4 2 1 3 2 1 INTVCC CIBMON 1000pF OUT RIL 18.2K IL 8 1 7 6 5 8 3 C35 0.01uF Q7 Si7135DP U3 LTC1540CMS8 LED2 CTMR 0.1uF LTC4000EGN 3 2 1 THERMAL REGULATION FOR Q7 DURING 'INSTANT-ON' OPERATION RNTC2 10K R48 10K BIAS 4 15 D 1 3 13 ITH 7 V+ V- 2 21 CC VM 25 3 2 ENC 1 4 18 IGATE 19 IID CHRG 8 IIMON 27 FLT 7 16 CSP 17 OFB 2 IBMON 2 GND 1 7 V- CSN TMR 5 GND 1 V+ 4 14 BGATE IL 28 RBFB1 1.00M 3 3 9 BIAS 2 CBIAS 1uF 10V OPT 1 D8 2 R38 OPT CBAT 2.2uF 25V 0805 CL 2.2uF 25V 0805 __ ECO THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. AK DAVID B. 2 SCALE = NONE APP ENG. PCB DES. APPROVALS J3 E11 E10 DATE: N/A SIZE DESCRIPTION VOUT-SYS 15V 6.25A LIMIT PRODUCTION J5 E14 NTC GND DATE 05-11-11 1 LTC4000EGN, LTC3789EGN DEMO CIRCUIT 1721A Wednesday, May 11, 2011 IC NO. SHEET 1 OF 2 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 DAVID B. APPROVED 14.4V, 4.5A BATTERY CHARGER WITH HIGH EFFICIENCY, 6-36 VIN, STEP-UP/DOWN DC/DC CONVERTER TECHNOLOGY IIMON NOT ON THE BOARD BAT 14.6V / 5A GND 1 REVISION HISTORY IBMON GND E18 E17 J4 E20 E15 2 REV TITLE: SCHEMATIC 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTE: UNLESS OTHERWISE SPECIFIED RCX 10K TMR R39 OPT CNTC OPT CUSTOMER NOTICE CCX OPT CX BIAS NTC 10 NTC F1 6.3A 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. Q8 2N7002L NTC C33 4.7uF 10V RCL 24K RBFB2 84.5K R42 OPT 11 FBG 12 BFB GND 6 BAT CL 4 3 2 GND 8 24 5 A B C D DEMO MANUAL DC1721A-A SCHEMATIC DIAGRAM dc1721aaf 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. A B C D INTVCC EXTVCC PLLIN SS SGND PGOOD VLOGIC R30 OPT R24 10K EXTVCC BIAS E9 RUN E8 CCM 2 MODE JP2 INTVCC PULSE SKIP E7 E6 E5 E4 E3 1 3 5 RFB2 8.06K INTVCC OPT C8 C7 CSS 0.022uF R27 OPT R22 OPT OPT R14 100 VOUT R10 R9 CF1 OPT RFB1 154K R7 100K C34 10nF R25 0 R13 100 VIN R3 14 13 12 11 10 9 8 7 6 4 <------ 100 R4 IOSENSE- IOSENSE+ ILIM VOUTSNS VINSNS RUN FREQ MODE/PLLIN SGND ITH SENSE1- SENSE1+ SS VFB CIRCUITRY ON THIS SIDE MUST CONNECT TO SIGNAL GND GROUNDPLANE C10 2.2uF R21 121K 1% C19 1.0nF 5 4 3 2 1 R40 OPT INTVCC ITH R12 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1uF C15 1uF 50V OPT R6 OPT D10 BZT52C5V6 VOUT1 INTVCC R11 10 2 1 C24 CIRCUITRY ON THIS SIDE MUST CONNECT TO POWER GND GROUNDPLANE ------> 100 NC SW2 TG2 BOOST2 BG2 EXTVCC INTVCC VIN BG1 PGND1 BOOST1 TG1 SW1 PGOOD U1 LTC3789EGN R41 OPT EXTVCC C14 0.1uF CF OPT INTVCC C11 1.24K OPT R60 10.0K ITH 1.24K VOS+ 4 TG1 SW1 Q10 OPT (FZT603) C22 0.22uF 16V D7 DFLS160 1206 C18 10uF D4 DFLS160 C4 0.22uF 16V R5 15 0805 1 2 4 Q2 SiR422DP 1 BG1 3 + Q5 SiR496DP 4 4.7uH L1 4 CIN4 OPT C26 C27 OPT Q3 VOUT1 SiR496DP + BG2 CS SW2 TG2 CUSTOMER NOTICE R18 8m 2% D5 B240A C12 390pF 1206 R28 5.6 1206 CIN3 OPT THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. VIN 2 SCALE = NONE DAVID B. AK APPROVALS R29 3.6 1206 C13 1.8nF 1206 + C9 C25 3.3uF 50V 1210 COUT1 150uF D6 20V B240A 2 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. R61 OPT (10K) D11 1 OPT 10V 2 (MM3Z10VT1) 5.6 D2 BAS16 R1 3 4 Q4 SiR422DP 3 8 5 6 7 INTVCC 2 1 1 2 1 2 3 8 5 6 7 1 2 3 8 5 6 7 1 2 3 8 5 6 7 1 2 3 5 DATE: N/A SIZE VIN+ C5 C6 3.3uF 50V 1210 + C3 C23 OPT 16V 1210 CIN1 56uF 50V VOUT J2 E2 E1 R8 10 VOS+ GND GND VIN+ VIN 6V - 36V 11A LIMIT 1 SHEET 2 LTC4000EGN, LTC3789EGN DEMO CIRCUIT 1721A Wednesday, April 13, 2011 IC NO. OF 2 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 20V COUT2 CIN2 56uF 50V + 150uF + J1 14.4V, 4.5A BATTERY CHARGER WITH HIGH EFFICIENCY, 6-36 VIN, STEP-UP/DOWN DC/DC CONVERTER TECHNOLOGY 0.008 2% R2 TITLE: SCHEMATIC C1 C2 C16 C17 22uF 25V 1210 0.004 2% R20 1 A B C D DEMO MANUAL DC1721A-A SCHEMATIC DIAGRAM dc1721aaf 9 DEMO MANUAL DC1721A-A 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 © 2004, Linear Technology Corporation dc1721aaf 10 Linear Technology Corporation LT 0611 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2011