DC2374A

DEMO MANUAL DC2374B LTC4013EUFD 60V Synchronous Buck Multi-Chemistry Battery Charger DESCRIPTION Demonstration circuit 2374B is a multi-chemistry battery charger with maximum power point tracking (MPPT) featuring the LTC®4013. The LTC4013 has 2 stage CC/CV charge cycles, 3 stage and 4 stage lead acid and Li-Ion battery algorithms. The DC2374B is set up to operate from a 21.5V to 35V supply or from a solar panel and charges a six cell lead acid battery at 5A. There are optional input and output capacitors plus large inductor pads and parallel top and bottom FET pads to allow high power charging. The LTC4013 is a 60V controller which makes it suitable for large battery stacks with up to a 60V supply or solar panel input. An MPPT burst mode feature allows the device to efficiently charge in low light levels. Since the LTC4013 PERFORMANCE SUMMARY is a controller, the power train can be sized from 1A to over 10A of charge current. The LTC4013 also has an NTC temperature compensated float voltage to help increase the battery life. The operating frequency, charge voltage, low battery (LB) voltage setting and timing are configurable with external resistors and a capacitor. The different charging algorithms are set by two tri-state mode pins and the TIMER pin as shown in Table 1. Refer to the LTC4013 data sheet for more details on the electrical and timing specifications. Design files for this circuit board are available. All registered trademarks and trademarks are the property of their respective owners. Specifications are at TA = 25°C PARAMETER CONDITIONS MIN TYP MAX Input Supply Range ENABLE (JP1) = UVLO ENABLE (JP1) = ON, MPPT (JP2) = ON 21.5 5 24 35 35 Battery Float Voltage (VFLOAT) MODE1 (JP4) = HI, MODE2 (JP3) = LO MODE1 (JP4) = MID, MODE2 (JP3) = LO MODE1 (JP4) = HI, MODE2 (JP3) = MID MODE1 (JP4) = MID, MODE2 (JP3) = MID 13.6 13.2 14.2 14.4 V V V V Battery Absorption Voltage (VABS) MODE1 (JP4) = HI, MODE2 (JP3) = LO MODE1 (JP4) = MID, MODE2 (JP3) = LO 14.2 14.4 V V Battery Equalization Voltage (VEQ) MODE1 (JP4) = HI, MODE2 (JP3) = HI, TIMER (JP6) = CAP MODE1 (JP4) = MID, MODE2 (JP3) = HI, TIMER (JP6) = CAP 16 15.6 V V Recharge Voltage (VRECHRG) MODE1 (JP4) = HI, MODE2 (JP3) = MID MODE1 (JP4) = MID, MODE2 (JP3) = MID 13.77 13.77 V V Low Battery (VLB) 10.4 V MPPT Maximum Power Voltage (VPM) to Open MPPT (JP2) = ON Circuit Voltage (VOC) Ratio 83.3 % FBOC to DCIN Attenuation Ratio 6.9 % MPPT (JP2) = ON UNITS V V Rev. 0 1 DEMO MANUAL DC2374B BOARD PHOTO Rev. 0 2 DEMO MANUAL DC2374B TYPICAL APPLICATION 24V 5A 6 Cell Lead Acid Charger with Absorption and Equalization Charging 24V DCIN M1 M2 C1 4.7µF C2/10 10µF×2 D4 C3 0.1µF R1 665k DCIN INFET VIN_S VIN BST R18 7.5k D2 RED R17 7.5k D3 GREEN BG M4 C13 D1 4.7µF B0540W L1 6.8µH INTVCC FBOC PGND LTC4013 SENSE STAT0 STAT1 RSENSE 10m BAT ISMON RFB2 499k FB MODE1 INTVCC M3 SW MPPT INTVCC 4 STAGE CHARGING WITH 13.6V FLOAT, 14.2V ABSORPTION AND 15.0V EQUALIZATION 3.3 HR TIMEOUT C15 0.15µF TG ENAB R3 40.2k C9 68µF NTC MODE2 RFB1 100k INTVCC BAT C16-18 22µF×3 C19 0.1µF C23 220µF BATTERY SYNC CLKOUT M1, M2, M3, M4 VISHAY SiS434DN L1 WURTH 7443340680 C1 4.7µF 50V C2, C10 10µF, 50V C16-C18 22µF 25V C23 220µF 25V C9 PANASONIC 68µF 50V EEHZA1H680P D4 1N4148WS RT SGND TMR LB C31 0.22µF R23 86.6k ITH R24 86.6k R22 23.2k C29 4.7nF 4013 TA05 Efficiency and Power Loss vs Charge Current 2.5 97 EFFICIENCY 96 2.0 POWER LOSS 94 1.5 93 92 1.0 91 90 89 87 0.5 VIN = 24V VBAT = 13.8V 88 0 1 2 3 4 CHARGE CURRENT (A) POWER LOSS (W) EFFICIENCY (%) 95 5 0 4013 TA01a Rev. 0 3 DEMO MANUAL DC2374B CHARGING OPTIONS Table 1. LTC4013 Charging Algorithm Selection MODE1 MODE2 TIMER Charging Mode VFLOAT (V) VABS (V) VEQ (V) Recharge TERMINATION EQ Timeout L L 0V 2 Stage 13.6 - - - None None L L CAP 2 Stage 13.6 - - - 3.33hrs None L M 0V 2 Stage 14 - - - None None L M CAP 2 Stage 14 - - - 3.33hrs None L H 0V N/A, Do Not Use - - - - - - L H CAP 4 Stage 13.6 14.2 15 - 3.33hrs 50min M L 0V 3 Stage 13.2 14.4 - - C/10 (~14.1V) None M L CAP 3 Stage 13.2 14.4 - - 3.33hrs None M M 0V Li-Ion 14.4 - - 95.8% (13.77V) C/10 (~14.3V) None M M CAP Li-Ion 14.4 - - 95.8% (13.77V) 3.33hrs None M H 0V N/A, Do Not Use - - - - - - M H CAP 4 Stage 13.2 14.4 15.6 - 3.33hrs 25min H L 0V 3 Stage 13.6 14.2 - - C/10 (~14.1V) None H L CAP 3 Stage 13.6 14.2 - - 3.33hrs None H M 0V Li-Ion 14.2 - - 97.1 (13.77V) C/10 (~14.1V) None H M CAP Li-Ion 14.2 - - 97.1 (13.77V) 3.33hrs None H H 0V N/A, Do Not Use - - - - - - H H CAP 4 Stage 13.6 14.2 15 - 3.33hrs 25min 24V SUPPLY QUICK START PROCEDURE The DC2374B is easy to set up to evaluate the performance of the LTC4013. Refer to Figure 1 and Figure 2 for proper measurement equipment setup. 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 VIN or VOUT and GND terminals. See Figure 2 for proper scope probe technique. 1. Set the DC2374B to operate in a three stage lead acid battery charging mode by positioning the jumpers as listed below: JP1 ENABLE - UVLO JP2 MPPT - OFF JP3 MODE2 – LO 4 JP4 MODE1 – HI JP5 NTC – INT JP6 TIMER – CAP JP7 PULL_UP PWR - DCIN 2. With power off, connect a 0V to 16V, 6A power supply (PS2) to BAT and GND terminals with a series ammeter and a voltmeter as shown in Figure 1. 3. With power off, connect a 5.1A load (LOAD1) to BAT and GND terminals in parallel with PS2 as shown in Figure 1. 4. Set PS2 to 10V and turn on PS2 and LOAD1. 5. With power off, connect a 0V to 35V, 5A power supply (PS1) to DCIN and GND terminals with a series ammeter and a voltmeter as shown in Figure 1. Rev. 0 DEMO MANUAL DC2374B 24V SUPPLY QUICK START PROCEDURE 6. Set PS1 to 17V and then turn on. 7. Slowly increase PS1 until the STAT0 LED illuminates. DCIN is now above the UVLO rising threshold. NOTE: PS1 can be increased from this voltage up to 35V. Make sure that the input voltage does not exceed 40V. 8. Observe that the battery charger current is only about 1A, 20%, and the voltage on the ISMON terminal measures about 0.2VDC. This is because the battery voltage is below the LB threshold. If the battery voltage remains below low bat for 25 minutes then the charge cycle is terminated. 9. Slowly increase PS2 until the battery current jumps up to about 5A, full load. ISMON reads close to 1V. The battery voltage is now above the low battery threshold. 10. Slowly increase PS2 until the battery current decreases to 4.5A. If the STAT0 LED is on and the STAT1 LED is off then the battery voltage is now approaching the absorption voltage and the charge timer has started. The battery will charge for about 3.3hrs before switching to float mode. 11. When the LTC4013 switches to float mode, the charge current will drop to 0A until the battery voltage is decreased below 13.6V. To observe equalization mode, follow steps 12 thru 18. Otherwise skip to step 19. 12. Make sure PS1 is set above UVLO rising threshold and set PS2 to about 12V. 13. Make sure JP6, the TIMER jumper, is still in the CAP position. Set JP3, the MODE2 jumper, to the HI position. The STAT0 LED should be on and the STAT1 LED should be off. If not, power PS1 down, set JP3 to LO, turn PS1 back on, then set JP3 back to HI. 14. Increase PS2 until the battery voltage approaches the absorption voltage as done in step 10. 15. Continue increasing PS2 until the battery current drops below 500mA. 16. In about 3.33 hours the charge current will increase to about 1A. This is equalization mode. 17. Increase PS2 until the battery current starts to decrease. The battery voltage is approaching the equalization voltage. 18. After about 25 minutes in equalization mode the charge current will return to about 0A until the battery voltage is reduced below the float voltage of about 13.6V. 19. When done, turn off and disconnect all loads and power supplies. NOTE: To evaluate the MPPT function, see the MPPT Quick Start Procedure section. NOTE: Equalization mode will not enable more than one time during a power on event. If an equalization cycle has already completed, power will need to be cycled in order to run a second equalization cycle. Rev. 0 5 DEMO MANUAL DC2374B 24V SUPPLY QUICK START PROCEDURE Figure 1. Proper Measurement Equipment Setup Figure 2. Measuring Input or Output Ripple Rev. 0 6 DEMO MANUAL DC2374B MPPT QUICK START PROCEDURE The LTC4013 has a maximum power point tracking feature that regulates the input voltage to the maximum power voltage (VPM) by adjusting the output of the charger. The LTC4013 MPPT function periodically stops charging, measures the open circuit voltage (VOC), and then continues charging while regulating the input voltage. As the sunlight changes, the VOC and VPM also change. This board is setup to regulate a VPM voltage of 83% of the measured VOC. This ratio can be changed to match the solar panel by changing R2, R8, and R10. To change the VOC/VPM ratio, follow the procedure listed in the Maximum Power Point Tracking section in the LTC4013 data sheet. There are a number of ways to test the MPPT function of the LTC4013. The most accurate way is to use a solar panel in sunlight, however it is difficult to control the sunlight conditions. Another method is to use a covered solar panel (dark panel) biased thru a controlled current source from 0A to the short circuit current (ISC) of the panel as shown in Figure 3. The solar panel can be replaced with a string of silicon rectifier diodes that can handle the power dissipation of Vf • ISC. With these methods, increasing the current on the panel to ISC produces the maximum VOC for a full light condition. Reducing this current simulates lower light conditions. A more simple method is to supply a voltage to DCIN with a series input resistor (RIN) as shown in Figure 4. RIN is calculated by (VOC – VPM)/IMP where IMP is the maximum power current. The supply current limit is set to ISC and the voltage of the supply is set to the desired VOC representing the desired sunlight. Set the power supply to the maximum VOC to produce a full light condition. Reducing the supply voltage simulates lower light conditions. To evaluate the LTC4013 MPPT function follow the procedure below: 1. Set the DC2374B to operate in MPPT mode with a three stage lead acid battery charging mode by positioning the jumpers as listed below: JP1 ENABLE - ON JP2 MPPT - ON JP3 MODE2 – LO JP4 MODE1 – HI JP5 NTC – INT JP6 TIMER – CAP JP7 PULL_UP PWR - DCIN 2. With power off, connect a 0V to 16V, 6A power supply (PS2) to BAT and GND terminals with a series ammeter and a voltmeter as shown in Figure 1. 3. With power off, connect a 5.1A load (LOAD1) to BAT and GND terminals in parallel with PS2 as shown in Figure 1. 4. Set PS2 to 10V and turn on PS2 and LOAD1. 5. With power off, connect a solar panel or solar panel simulator as previously discussed and refer to Figure 3 and Figure 4 as needed. 6. With a full or close to full light condition, observe that the battery charger current is only about 1A, 20%, and the voltage on the ISMON terminal measures about 0.2VDC. DCIN is also above the VPM point at this time. This is because the battery voltage is below the Low Battery threshold. If the battery voltage remains below low bat for 25 minutes then the charger cycle is terminated. The solar panel can supply more power to the charger than needed at this point. 7. Slowly increase PS2 until the battery current jumps up to above 1A. The battery voltage is now above the low battery threshold. If the IMP is less than the input current needed to provide full charge current, the LTC4013 will regulate the charge current below full load to obtain a DCIN voltage near the VPM point for the measured VOC. 8. If possible, vary the light conditions for the solar panel or simulator and observe the charge current is adjusted to maintain the VMP for the measured VOC. NOTE: If the charge current is reduced below C/10, ~ 500mA, and the battery voltage is over the low battery threshold, then the TEOC timer will start even if the battery voltage is not approaching the absorption voltage. 9. If possible, return the light source to near full light condition. Rev. 0 7 DEMO MANUAL DC2374B MPPT QUICK START PROCEDURE 10. Slowly increase PS2 until the battery current starts to decrease below 1A. The battery voltage is now approaching the absorption voltage. The timer will start if not already started from a low light condition. 11. When the timer has elapsed, the LTC4013 will switch to float mode and the charge current will drop to near 0A until the battery voltage is reduced below the float voltage. 12. When done, turn off and disconnect all loads and power supplies. Figure 3. Solar Panel Simulator Using a Dark Solar Panel or Diode String Rev. 0 8 DEMO MANUAL DC2374B MPPT QUICK START PROCEDURE Figure 4. Solar Simulator Using a Power Supply with Series Resistor Rev. 0 9 DEMO MANUAL DC2374B APPLICATION INFORMATION Changing Board Configuration This board is optimized for a 24V to 14V lead acid battery with 5A charge current, however it can be modified for other charging topologies, different charge currents, plus different DCIN and battery voltages. The DC2374B can also accommodate higher power outputs. There are optional capacitors, inductor, FETs, and a catch diode on the bottom of the board that can be used for larger components if needed. The layout was designed with ample copper and vias to provide enough thermal relief for 300W. Refer to the data sheet for the sizing of all of the required components and changes as needed. No Battery Operation The LTC4013 will operate without a battery, however there needs to be at least 2V on the SENSE pin, VIN must be above 4.5V, DCIN must be above VIN and above VBAT by about 100mV, plus the ENAB pin must also be above its rising threshold to startup. For single input FET applications VIN will increase to DCIN – Vf of the input FET body diode. For dual input FET applications a resistor can be used to bleed current across the first FET to allow VIN to charge up. For MPPT applications, the added resistor should provide an RC constant (R • CVIN) greater than 10ms. One way to raise the SENSE pin above to 2V is to provide a weak pullup from INTVCC with a blocking diode on the BAT pin when no battery is present. VFLOAT must be greater than INTVCC for this method. Refer to the “Starting Without a Battery” section of the LTC4013 data sheet for more information on this. Connecting a High Voltage Battery When connecting a battery to the DC2374B demo board, the battery will instantaneously charge the bulk capacitors on the BAT and the VIN nodes. Since the battery and capacitors have very low ESR, the instantaneous current can be 10’s or 100’s of amps when the battery is first connected and can damage the components in its path. It is recommended to pre-charge the BAT terminals of the DC2374B prior to connecting a low ESR battery. This can be done by connecting the battery thru a current limiting resistor first, then short across the resistor. Refer to the Plugging in a Battery section of the LTC4013 data sheet for more information. Rev. 0 10 DEMO MANUAL DC2374B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1 CAP, CHIP, X5R, 4.7µF, ±10%, 50V, 0805 TDK, C2012X5R1H475K 2 3 C2, C13, C21 CAP, CHIP, X5R, 68nF, ±10%, 50V, 0402 TDK, CGA2B3X5R1H683M050BB 3 2 C3, C4 CAP, CHIP, X5R, 10µF, ±20%, 50V, 1210 TDK, C3225X5R1H106M250AB 4 1 C10 CAP.,150uF,ALUM. ELECT.,50V,20%,10x10.2mm RADIAL,FK Series, AEC-Q200 PANASONIC, EEE-FK1H151P 5 1 C14 CAP, CHIP, X5R, 4.7µF, ±20%, 6.3V, 0603 TAIYO YUDEN, JMK107BJ475MAHT 6 1 C15 CAP, CHIP, X5R, 0.22µF, ±10%, 25V, 0402 TAIYO YUDEN, TMK105BJ224KVHF 7 1 C16 CAP, CHIP, COG, 33pF,±5%, 50V, 0402 JOHANSEN TECHNOLOGY, 500R07S330JV4T 8 1 C17 CAP, CHIP, X5R, 0.22µF, ±10%, 10V, 0402 TAIYO YUDEN, LMK105BJ224KV-F 9 3 C18-C20 CAP, CHIP, X5R, 22µF, ±20%, 25V, 1210 TAIYO YUDEN, TMK325BJ226MM-T 10 1 C24 CAP, 220µF, 25V, Alum. Electro, 20%, 8mm X 10.2mm PANASONIC, EEHZC1E221P 11 2 C26, C29 CAP, CHIP, COG, 100pF, ±5%, 50V, 0402 TDK, CGJ2B2C0G1H101J050BA 12 1 C27 CAP, CHIP, X7R, 47nF, ±10%, 25V, 0402 MURATA, GCM155R71E473KA55D 13 1 C28 CAP, CHIP, X7R, 4.7nF, ±10%, 25V, 0402 MURATA, GRM155R71E472KA01D 14 1 C31 CAP, CHIP, X5R, 10nF, ±10%, 10V, 0402 KEMET, C0402C103K8PAC7867 15 1 D1 DIODE, GEN PURP, 75V, 250MA, SOD123 DIODES INC, 1N4448WQ-7-F 16 1 D5 DIODE, GEN PURP, 75V, 150MA, SOD323F ON SEMICONDUCTOR, 1N4148WS 17 1 L1 IND, SMT, 6.8µH, ±20% WURTH, 74439358068 18 4 M1, M2, M3, M4 MOSFET, N-CH, 40V, 10.5A, 1212-8 VISHAY SILICONIX, SI7116DN-T1-E3 19 2 R1, R15 RES, CHIP, 20Ω, ±1%, 1/16W, 0402 VISHAY, CRCW040220R0FKED 20 2 R2, R3 RES, CHIP, 665kΩ, ±1%, 0.1W, 0402 VISHAY, CRCW0402665KFKED 21 2 R4,R21 RES, CHIP, 40.2KΩ, ±1%, 0.1W, 0402 VISHAY, CRCW040240K2FKED 22 2 R5,R24 RES, CHIP, 10KΩ, ±1%, 1/16W, 0402 VISHAY, CRCW040210K0FKED 23 1 R6 RES, CHIP, 49.9KΩ, ±1%, 1/16W, 0402 VISHAY, CRCW040249K9FKED 24 3 R7-R9 RES, CHIP, 100KΩ, ±5%, 1/16W, 0402 VISHAY, CRCW0402100KJNED 25 1 R10 RES, CHIP, 3.40KΩ, ±1%, 1/16W, 0402 VISHAY, CRCW04023K40FKED 26 2 R11, R12 RES, CHIP, 86.6KΩ, ±1%, 1/16W, 0402 VISHAY, CRCW040286K6FKED 27 3 R13, R14, R17 RES, CHIP, 100KΩ, ±1%, 1/16W, 0402 VISHAY, CRCW0402100KFKED 28 1 R16 RES, CHIP, 499KΩ, ±1%, 1/16W, 0402 VISHAY, CRCW0402499KFKED 29 1 R22 RES, CHIP, 0Ω, ±1%, 1/16W, 0402 VISHAY, CRCW04020000Z0ED 30 1 R23 RES., 4.99 OHMS, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04024R99FKEDC 31 1 RSENSE RES, CHIP, 10mΩ, ±1%, 1W, 1632 LONG SIDE TERM SUSUMU, PRL1632-R010-F-T1 32 1 U1 60V SYNC. BUCK MULTI-CHEMISTRY BATTERY CHARGER ANALOG DEVICES, LTC4013EUFD#PBF Rev. 0 11 DEMO MANUAL DC2374B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP, 68µF, 50V, Alum. Electro, 20%, 8mm x 10.2mm PANASONIC, EEHZA1H680P Additional Demo Board Circuit Components 33 0 C5 (OPT) 34 0 C6-C9, C22, C23 (OPT) CAP, CHIP, X5R, 10µF, ±20%, 50V, 1210 TDK, C3225X5R1H106M250AB 35 0 C11, C12 (OPT) CAP.,68uF,ALUM. ELECT.,50V,20%,8x10.2mm, RADIAL,AEC-Q200 PANASONIC, EEHZA1H680P 36 0 C25 (OPT) CAP, 220µF, 25V, Alum. Electro, 20%, 8mm X 10.2mm PANASONIC, EEHZC1E221P 37 0 C30 (OPT) CAP, CHIP, COG, 100pF, ±5%, 50V, 0402 TDK, CGJ2B2C0G1H101J050BA 38 0 D2 (OPT) DIODE, SCHOTTKY, 60V, 3A, SMB ON SEMICONDUCTOR, MBRS360BT3G 39 0 D6 (OPT) DIODE,TVS,12V,15.5V,350W,SOD323-2 MICRO COMMERCIAL, ESD12VD3B-TP 40 0 L2 (OPT) IND, SMT, WE-HCI 1365 WURTH, WE-HCI 1365 41 0 M5, M6 (OPT) MOSFET, N-CH, 40V, 35A, 1212-8 VISHAY SILICONIX, SIS434DN-T1-GE3 42 0 R20 (OPT) RES, CHIP, 0Ω JUMPER, 1W, 2512 VISHAY, CRCW25120000Z0EG Hardware: For Demo Board Only 43 1 D3 DIODE, LED, GREEN, 0603 LITE-ON, LTST-C190KGKT 44 1 D4 DIODE, LED, RED, 0603 LUMEX, SML-LX0603SRW-TR 45 4 E1, E4, E5, E8 TURRET, 0.09 DIA MILL-MAX, 2501-2-00-80-00-00-07-0 46 4 E2, E3, E6, E7 BANANA JACK, NON-INSULATED KEYSTONE, 575-4 47 10 E9 - E18 TURRET, 0.061 DIA MILL-MAX, 2308-2-00-80-00-00-07-0 48 3 JP1, JP3, JP4 HEADER, 4PINS, 2mm WURTH, 62000411121 49 4 JP2, JP5-JP7 HEADER, 3PINS, 2mm WURTH, 62000311121 50 7 XJP1-XJP7 SHUNT 2mm 1X2 WURTH, 60800213421 51 2 R18, R19 RES, CHIP, 7.5KΩ, ±1%, 1/4W, 1206 YAGEO, RC1206FR-077K5L 52 4 MH1-MH4 STANDOFF, NYLON 0.5" KEYSTONE, 8833 Rev. 0 12 D C B A E2 1 GND E18 S LO S R6 49.9k R5 10k OFF JP3 MODE2 HI MID 100k 5% R9 INTVCC E13 E9 OFF R2 665k *UVLO JP1 ENABLE ON TPB2 C1 4.7µF 0805 R1 20 DCIN JP2 MPPT ON C29 100pF ISMON LO MID JP4 MODE1 HI SYNC 5V MAX INTVCC E4 C16 33pF TPA2 GND E3 5V-35V 24V NOMINAL DCIN E1 S R20 2 C30 OPT 2 S 16 15 6 11 12 14 4 3 S R21 40.2k C27 47nF ITH RT 3 29 3 28 VIN VIN_S 27 M2 SI7116DN-T1-E3 OFF JP6 TIMER ON S NTC 17 13 8 7 18 19 20 24 23 22 21 C15 0.22uF 25V TEOC = 3.33hr 10 TMR CLKOUT STAT1 STAT0 FB BAT SENSE BG SW TG BST INTVCC 25 U1 LTC4013EUFD 4 D1 S INT R14 100K JP5 NTC S DESIGNATES SGND NODE 4 NOTES: UNLESS OTHERWISE SPECIFIED 1. RESISTORS: OHMS, 0402, 1%, 1/16W 2. CAPACITORS: 0402, 10%, 50V R23 R22 EXT C17 0.22uF 10V M3 M4 M6 OPT M5 OPT L2 OPT C6 OPT 1210 C2 68nF D2 OPT POWERDI123A 6.8µH 74439358068 5 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C8 OPT 1210 C4 10µF 1210 + 10m 1W RSENSE 6 6 SCALE = NONE ZP NC C5 OPT + 02 - S TPA1 R17 100k R16 499k R15 20 TPB1 C22 OPT 1210 C18 22µF 1210 25V DATE: N/A SIZE 07-19-18 IC NO. + C25 OPT D4 RED BAT E17 E16 E15 E14 E12 E11 R19 7.5k 1206 E8 E7 DATE 07-19-18 www.analog.com GND NTC GND CLKOUT STAT1 STAT0 EXT_PWR 0V - 40V GND 13.6V FLOAT 5A CC E6 ZP 7 LTC4013 DEMO CIRCUIT 2374B 8 SHEET 1 OF 1 02 REV. 60V SYNCHRONOUS BUCK MULTI-CHEMISTRY BATTERY CHARGER R18 7.5k 1206 8 APPROVED E5 E10 PULL_UP PWR JP7 EXT_PWR DCIN + C21 68nF 25V C12 OPT C24 220uF 25V C20 22µF 1210 25V + PRODUCTION DESCRIPTION REVISION HISTORY C11 OPT + DCIN C23 OPT 1210 C19 22µF 1210 25V 7 D3 GREEN C10 150uF EEE-FK1H151P REV ECO TITLE: SCHEMATIC C28 4.7nF 25V C9 OPT 1210 APPROVALS C7 OPT 1210 C3 10µF 1210 WE-HCI 1365 L1 CUSTOMER NOTICE INTVCC 5 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. 100K R13 0 SI7116DN-T1-E3 4.99 SI7116DN-T1-E3 C14 4.7uF 6.3V 0603 INTVCC 1N4448WQ-7-F * DEFAULT UVLO RISING THRESHOLD = 21.5V 26 SGND PGND R12 S 86.6k LB = 10.4V S 9 LB ISMON MODE1 MODE2 SYNC FBOC MPPT ENAB DCIN INFET R11 86.6k FSW = 500kHz R8 100k 5% S C26 100pF S C31 10nF 25V R10 3.40k R4 40.2k 10k 5 C13 68nF 2 1 D5 1N4148WS D6 ESD12VD3B OPT M1 SI7116DN-T1-E3 R24 R3 665k S 100k 5% R7 0 OPT 1 2 2 1 1 D C B A DEMO MANUAL DC2374B SCHEMATIC DIAGRAM Rev. 0 13 DEMO MANUAL DC2374B 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. Rev. 0 14 02/19 www.analog.com  ANALOG DEVICES, INC. 2016–2019