LTC4020EUHF

LTC4020EUHF LINER

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Technical content

Description

Multi-Chemistry Battery Charger Demonstration circuit 2134A is a high power buck-boost multichemistry battery charger featuring the LT C®4020. The board will accept an input voltage between 15V and 55V. The float voltage of the battery output (BAT) is 25.2V, with 6.3A maximum charge current. The converter output (VOUT) has a voltage range of 21V to 28V, with 8A maxi- mum load current. The LTC4020 contains a high efficiency synchronous buck-boost DC/DC controller, and uses a proprietary average current mode architecture. The LTC4020 battery charger can provide a constant- current/constant-voltage charge algorithm (JP1: CC/CV, L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. performance summary with mode pin grounded), constant-current charging (JP1: CC, with mode pin floated), or charging with an optimized 4-step, 3-stage lead-acid battery charge profile (JP1: lead- acid, with mode pin connected to INTVCC). The LTC4020 data sheet gives a complete description of the IC operation and application information. The data sheet must be read in conjunction with this quick start guide. Design files for this circuit board are available at http://www.linear.com/demo/DC2134A Specifications are at TA = 25°C PARAMETER CONDITION VALUE Input Voltage Range 15V to 55V Battery Float Voltage (BAT) (Nominal) IBAT = 0A 25.2V Converter Output Voltage (VOUT) IOUT = 0A to 8A 21V to 28V Maximum Battery Charge Current, IBAT IOUT = 0A 6.3A Maximum Converter Output Current, IOUT IBAT= 0A 8A Typical Efficiency VIN = 24V, VOUT = 25.2V, IOUT = 8A 98.1% Typical Converter Output Ripple VIN = 55V, VOUT = 25.2V, IOUT = 8A (20MHz Bandwidth) 109mVP–P

Demonstration circuit 2134A is easy to set up to evaluate the performance of the LTC4020. Refer to Figure 1 for the proper measurement equipment setup and follow the procedure below: 1. With power off, connect the input power supply (set for 0V) to VIN and GND (input return). 2. Connect the converter output load between Vout and GND (Initial load: no load). 3. Connect the DVMs to the input and outputs. 4. Turn on the input power supply and slowly increase to 24V. Check for the proper output voltages, VOUT of 25.2V and BAT of 25.2V. 5. Once the proper output voltages are established, adjust the converter output load within the operating range (8A maximum) and/or adjust input voltage (15V to 55V), and observe the output voltage regulation, ripple voltage, efficiency 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 2 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. Additional Notes: 1. CAUTION: Be careful when testing with high voltage. High voltage can result in an electric shock if care is not taken. 2. CAUTION: Batteries are potentially dangerous high energy sources. Improper connection, overcharge, or rapid discharge could result in explosion and/or file. Please read the specification/manual of the battery before test. 3. The combined converter output load current and bat- tery charging current should not exceed 8A. 4. Without a proper battery, BAT output can be open or connected with other suitable loads for test purposes. It may be a good practice to add low ESR electrolytic capacitors to the BAT output (≥1000µF at ≥35V, for 25.2V float voltage). Note: These capacitors help simulate the low impedance of a battery and maintain stability of the charge current loop. It’s only needed for test purposes with electronic or resistive loads, and not needed in the actual battery application/test (where the BAT load is a battery). 5. BAT float voltage can be easily adjusted with the resis- tor divider R8/R10. Converter output voltage VOUT can be adjusted with the resistor divider R9/R11. Adjust/ optimize the loop compensations if necessary.

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1 CAP, CHIP, X7S, 0.1µF, 10%, 100V, 0603 TDK, C1608X7S2A104K 2 2 C2,C3 CAP, ELEC., 56µF, 20%, 63V, 10X12.5 SUNCON, 63HVH56M 3 1 C4 CAP, CHIP, C0G, 100pF, 10%, 16V, 0402 AVX, 0402YA101KAT9A 4 1 C6 CAP., MLCC, 6800pF, 50V,10%, 0603 AVX,ESD35C682K4T2A-18 5 1 C8 CAP, CHIP, C0G, 47pF, 10%, 50V, 0603 AVX., 06035A470KAT2A 6 1 C11 CAP, CHIP, X5R, 4.7µF, 10%, 6.3V, 0603 AVX, 06036D475KAT2A 7 1 C12 CAP, CHIP, X7R, 0.033µF, 10%, 25V, 0402 TDK, C1005X7R1E333K 8 4 C14, C18, C27, C28 CAP, CHIP, X5R, 10µF, 20%, 35V, 1210 AVX, 1210DD106MAT2A 9 2 C15, C17 CAP, ELEC., 220µF, 20%, 35V 10X12.5 SUNCON, 35HVH220M 10 2 C16, C23 CAP, CHIP, X7S, 4.7µF, 20%, 100V, 1210 TDK,C3225X7S2A475M 11 3 C5, C19, C20 CAP, CHIP, X5R,0.22µF, 10%, 25V, 0603 AVX, 06033D224KAT2A 12 1 C21 CAP, CHIP, X5R, 10µF, 20%, 6.3V, 0805 AVX., 08056D106KAT2A 13 2 C39, C40 CAP, CHIP, X7R,0.22µF, 20%, 10V, 0603 AVX, 0603ZC224MAT2A 14 2 D1, D2 DIODE, SMT, SUPERBARRIER, 60V, 0.5A, SOD123 DIODES INC., SBR0560S1-7 15 1 D3 DIODE, LED, RED, SMT, 0603 WÜRTH, 150060SS75000 16 1 D4 DIODE, LED, GREEN, 0603 WÜRTH, 150060VS75000 17 1 D6 DIODE., SMT SCHOTTKY BARRIER RECTIFIER, SMA VISHAY, B360A-E3 18 1 L1 IND, SMT, 5.6µH WÜRTH, 7443556560 19 1 M1 P-CHANNEL MOSFET, –30V PowerPAKS08 VISHAY, Si7145DP-T1-GE3 20 2 M2, M4 N-CHANNEL MOSFET, 60V, PowerPAKS08 VISHAY, SiR664DP-T1-GE3 21 2 M3, M7 N-CHANNEL MOSFET, 40V, PowerPAKS08 VISHAY, SiR422DP-T1-E3 22 1 RCBAT1 RES, CHIP, 0.008Ω, 1%, 1W, 2512 VISHAY, WSL25128L000FEA 23 2 RCBRB1, RCBRT1 RES, CHIP, 0.002Ω, 1%, 1W, 2512 VISHAY, WSL25122L000FEA 24 2 R1, R13 RES, CHIP, 100kΩ, 5%, 0402 VISHAY, CRCW0402100KJNED 25 1 R2 RES, CHIP, 510kΩ, 5%, 0402 VISHAY, CRCW0402510KJNED 26 1 R4 RES, CHIP, 51kΩ, 1%, 0402 VISHAY, CRCW040251K0FKED 27 3 R6, R7, R19 RES, CHIP, 20Ω, 5%, 0402 VISHAY, CRCW040220R0JNED 28 1 R8 RES, CHIP, 226kΩ, 0.1%, 0603 VISHAY, TNPW06030F226BEEA 29 1 R9 RES, CHIP, 226kΩ, 1%, 0603 VISHAY, CRCW0603226KFKEA 30 1 R10 RES, CHIP, 24.9kΩ, 0.1%, 0402 VISHAY, TNPW04020F24K9BEED 31 1 R11 RES, CHIP, 24.9kΩ, 1%, 0402 VISHAY, CRCW040224K9FKED 32 1 R14 RES, CHIP, 10kΩ, 1%, 0402 VISHAY, CRCW040210K0FKED 33 1 R15 RES, CHIP, 36kΩ, 1%, 0603 VISHAY, CRCW060336K0FKEA 34 1 R16 RES, CHIP, 47kΩ, 1%, 0603 VISHAY, CRCW060347K0FKEA 35 2 R18, R20 RES, CHIP, 100Ω, 5%, 0402 VISHAY, CRCW0402100RJNED 36 2 R26, R27 RES, CHIP, 3kΩ, 5%, 0402 VISHAY, CRCW04023K00JNED 37 1 U1 IC, LTC4020EUHF, 5mm × 7mm QFN-38 LINEAR TECH., LTC4020EUHF

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Demo Board Circuit Components 1 0 C13, C7, C9, C10, C30, C31 (OPT) CAP, CHIP, OPT 0603 OPT 2 0 C22, C24, C25 (OPT) CAP, CHIP, OPT 0402 OPT 3 0 C26, C29, C32-C38 (OPT) CAP, CHIP, OPT 1210 OPT 4 0 D5 (OPT) DIODE, OPT SMA OPT 5 0 D7 (OPT) DIODE, OPT SOD123 OPT 6 0 M5, M6, M8, M9 (OPT) N-CHANNEL MOSFET, OPT PowerPAKS08 OPT 7 0 R3 (OPT) RES, OPT 0402 OPT 8 8 R21-25, R34, R35, R37 RES, CHIP, 0Ω JUMPER, 0402 VISHAY, CRCW04020000Z0ED 9 0 R17, R31, R32 (OPT) RES, OPT 0603 OPT 10 1 R36 RES, CHIP, 0Ω JUMPER, 0603 VISHAY, CRCW06030000Z0EA 11 1 R38 RES, CHIP, 5.1, 5%, 0805 VISHAY,CRCW08055R10JNEA Hardware: For Demo Board Only 1 8 E1, E2, E5, E9, E10, E13, E14, E17 TURRET, 0.09" DIA MILL-MAX, 2501-2-00-80-00-00-07-0 2 6 E3, E4, E11, E12, E15, E16 VERTICAL BANANA JACK, 575-4 KEYSTONE, 575-4 3 1 JP1 HEADER, HD2X3-079 WÜRTH, 62000311121 4 1 XJP1 SHUNT, .079" CENTER WÜRTH, 60800213421 5 4 STAND-OFF, NYLON (SNAP ON), 0.375" TALL KEYSTONE, 8832 (SNAP ON)

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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. schematic Diagram D D C C B B A A 15V - 55V VIN 63V 63HVH56M 63V 63HVH56M 21V - 28V VOUT GND GND BAT 6.3A MAX 25.2V FLOAT 25V 25V 16V 6.3V 35HVH220M 35V 35HVH220M 35V 100V NTC SHDN GND 100V 35V 35V 35V 35V SGND 8A MAX MODE CC/CV CC LEAD-ACID WURTH 7443556560 GND VOUT GND BAT VIN 0.1% 0.1% VBAT VOUT VOUT VBAT INT_VCC INT_VCC          C22 OPT C22 OPT RCBAT1 0.008 2512 RCBAT1 0.008 2512 OPT OPT 5678 SiR664DP SiR664DP 5 6 7 8 2 3 SiR664DP SiR664DP 5 6 7 8 2 3 E13E13 RCBRT1 0.002 2512 RCBRT1 0.002 2512 R22 R22 RCBRB1 0.002 2512 RCBRB1 0.002 2512 SiR422DP SiR422DP 5678 OPT OPT 5678 OPT OPT C25 OPT C25 OPT R16 47k 0603 R16 47k 0603 R13 100k R13 100k E9E9 R26 R26 R10 24.9k R10 24.9k 100pF 100pF SBR0560S1 SBR0560S1 C34C34 R14 10k R14 10k Si7145DP Si7145DP 5 6 7 8 2 3 C16 4.7uF 1210 C16 4.7uF 1210 C10 OPT 0603 C10 OPT 0603 E1E1 C37C37 R20 100 R20 100 RED RED E4E4 C13 OPT 0603 C13 OPT 0603 226k 0603 226k 0603 E16E16 C21 10uF 0805 C21 10uF 0805 R35 R35 C32C32 C39 0.22uF 0603 C39 0.22uF 0603 LTC4020EUHF LTC4020EUHF ILIMIT25 VFBMAX26 BAT 20 STAT1 12 STAT2 13 RNG/SS15 BG1 37 SGND PGND SGND BG2 33 TG2 31 BST2 30 SW1 38 TG1 1 BST1 2 INT_Vcc 34 FBG18 SENSGND 4 VFBMIN19 CSOUT24 ITH 27TIMER14 RT8 CSN 22 SGND SHDN9 VIN_REG10 SENSVIN 7 SENSTOP 6 CSP 23 BGATE 21 PVIN SENSBOT 5 NTC16 MODE11 Vc 28 SW2 32 VFB17 0.22uF 0603 0.22uF 0603 C11 4.7uF 6.3V 0603 C11 4.7uF 6.3V 0603 OPT OPT R25 R25 R37 R37 E3E3 OPT 0603 OPT 0603 C40 0.22uF 0603 C40 0.22uF 0603 C14 10uF 1210 C14 10uF 1210 + C2 56uF+ C2 56uF R18 100 R18 100 510k 510k R19 R19 E12E12 OPT 0603 OPT 0603 E2E2 OPT OPT 5 6 7 8 2 3 C27 10uF 1210 C27 10uF 1210 R34 R34 SBR0560S1 SBR0560S1 R27 R27 E14E14 R38 5.1 0805 R38 5.1 0805 C29 OPT 1210 C29 OPT 1210 C38C38 C30 OPT 0603 C30 OPT 0603 R32 OPT 0603 R32 OPT 0603 OPT OPT C23 4.7uF 1210 C23 4.7uF 1210 C28 10uF 1210 C28 10uF 1210 R15 36k 0603 R15 36k 0603 R11 24.9k R11 24.9k C24 OPT C24 OPT R24 R24 JP1JP1 5 6 C31 OPT 0603 C31 OPT 0603 GRN GRN 0.1uF 0603 0.1uF 0603 R17 OPT 0603 R17 OPT 0603 + C17 220uF+ C17 220uF + C15 220uF + C15 220uF R21 R21 + C3 56uF+ C3 56uF E10E10 SiR422DP SiR422DP 5678 C36C36 226k 0603 226k 0603 C33C33 47pF 0603 47pF 0603 E11E11 R36 0603 R36 0603 100k 100k C19 0.22uF 0603 C19 0.22uF 0603 C35 OPT 1210 C35 OPT 1210 5.6uH 5.6uH B360A B360A C18 10uF 1210 C18 10uF 1210 E5E5 R23 R23 E15E15 E17E17 51k 51k R31 OPT 0603 R31 OPT 0603 C26 OPT 1210 C26 OPT 1210 C12 0.033uF C12 0.033uF 6.8nF 0603 6.8nF 0603 OPT OPT 5 6 7 8 2 3 C20 0.22uF 0603 C20 0.22uF 0603

DEMO MANUAL DC2134A Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com  LINEAR TECHNOLOGY CORPORATION 2014 LT 0414 • PRINTED IN USA DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LT C) 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 ONL Y and is not provided by LT C 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 LT C 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. LT C assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LT C 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 LT C applica- tion engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation