DEMO MANUAL DC2133A LTC4079 60V, 250mA Linear Charger with Low Quiescent Current DESCRIPTION Demonstration circuit 2133A features a simple battery charger circuit using the LTC®4079 high-voltage monolithic linear charger. The DC2133 has an input voltage range from 2.7V to 60V and is capable of supplying up to 250mA charge current. The charge voltage is jumperselectable to 4.2V or 8.4V. Charge current is adjustable via the PROG pin and initially programmed for 99mA. In shutdown or when unpowered, LTC4079 consumes only 10nA from the battery. The NTC input is connected to an on-board resistance to enable charging with only a 2-wire battery connection; however an external thermistor may be used with the NTC test point. DC2133A is initially configured to enable charging from application of VIN above the LTC4079 UVLO threshold. L, LT, LTC, LTM, 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 PARAMETER Termination is accomplished by timer method. Charging status is reflected by the CHRG LED. Design files for this circuit board are available at http://www.linear.com/demo/DC2133A Specifications are at TA = 25°C CONDITIONS TYPICAL VALUE Input Voltage Range 2.7V to 60V Default Charging Voltage VBAT = 4.2 4.2V Default Charging Current RPROG = 3.01k 99mA PROG Pin Voltage RPROG = 3.01k, ICHG = 99mA 2.5V Input Regulation Voltage EN = REG (JP1) 10.3V Default Charge Timer CTMR = 0.068μF 3h 45 min 100 240mAh Li-Ion VIN = 5V RPROG = 3.01k CTMR = 0.068µF 90 80 IBAT (mA) 60 5.0 4.8 4.6 4.4 IBAT 4.2 50 VBAT 40 30 4 3.6 TERMINATION 10 0 3.8 C/10 20 0 1 2 3 TIME (HOURS) 4 VBAT & VCHRG (V) 70 5.2 CHRG 3.4 5 3.2 dc2133a F01 Figure 1. Typical Battery Charge Cycle dc2133afa 1 DEMO MANUAL DC2133A QUICK START PROCEDURE Demonstration circuit 2133 is easy to set up to evaluate the performance of LTC4079. Refer to Figure 2 for proper measurement equipment setup and follow the procedure below. 5.Allow the battery to charge for a complete cycle. CHRG will disable the LED when the charge current has dropped below 10mA, but the timer will continue to run and charge current will flow until the timer period ends. 1.The jumpers are initially set as below for a typical 4.2V charging application: Optional JP1 JP2 JP3 JP4 JP5 EN NTC TIMER VBAT LED ON INT ON 4.2 ON 2.With all power off, connect the input supply, battery, and meters as shown in Figure 2. Note: Depending on the input cable and power supply impedance, hot plugging an input supply may cause overvoltage transients that can damage the board. R1 and C1 form an input transient damping network that mitigates this. See AN-88 for component selection. 3.Turn on the input power supply. Adjust the input voltage and current limit to the desired value. 4.Monitor the PROG pin voltage for a scaled representation of the output current according to the relationship: IBAT = 250 • VPROG RPROG 1.While powered off, change the setting of the EN jumper, JP1, to REG to evaluate the enable input regulation feature, or to OFF to disable charging. 2.Use an external thermistor connected to the NTC jumper, JP2, set to EXT. 3.To terminate charge on current, disable the TIMER input with JP3 set to OFF. LTC4079 will terminate on C/10 only. 4.The CHRG LED can be disconnected to measure the true quiescent current of the LTC4079 in shutdown or for connection to external pull-up logic by setting the LED jumper, JP5 to OFF. 5.To change the battery charging voltage, set the VBAT jumper, JP4. Alternatively, the feedback resistors may be adjusted for custom values, according to the battery voltage. Note: DO NOT change the VBAT with VIN applied. Note: Minimize capacitance on the PROG pin to prevent charger instability. dc2133afa 2 DEMO MANUAL DC2133A QUICK START PROCEDURE A + – + v V BATTERY Figure 2. Proper Measurement Equipment Setup dc2133afa 3 DEMO MANUAL DC2133A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1, C3 CAP, CHIP, X7R,1μF, 20%, 100V, 1210 AVX, 12101C105MAT2A 2 1 C2 CAP, CHIP, X5R,6.8µF, 10%, 25V, 1210 TDK, C3225X5R1E685K 3 1 CTMR CAP, CHIP, X7R, 0.068μF, 10%, 50V, 0603 MURATA, GRM188R71H683KA93D 4 3 R2, R5, R6 RES, CHIP, 100kΩ, 1%, 0603 VISHAY, CRCW0603100KFKEA 5 1 R3 RES, CHIP, 768kΩ, 1%, 0805 VISHAY, CRCW0805768KFKEA 6 1 R4 RES, CHIP, 3.01kΩ, 1%, 0603 VISHAY, CRCW06033K01FKEA 7 1 R7 RES, CHIP, 1.07MΩ, 1%, 0805 VISHAY, CRCW08051M07FKEA 8 1 R8 RES, CHIP, 412kΩ, 1%, 0603 VISHAY, CRCW0603412KFKEA 9 1 R12 RES, CHIP, 2.55MΩ, 1%, 0805 VISHAY, CRCW08052M55FKEA 10 1 U1 I.C., LTC4079IDD LINEAR TECH., LTC4079IDD#PBF Additional Demo Board Circuit Components 1 1 LED1 DIODE, LED, SMT, GREEN, 0603 LITE-ON, LTST-C190KGKT 2 1 R1 RES, CHIP, 1Ω, 5% 0805 VISHAY, CRCW08051R00JNEA 3 1 R9 RES, CHIP, 12kΩ, 3/4W, 5%, 1210 VISHAY, CRCW121012K0JNEAHP 4 1 R10 RES, CHIP, 100kΩ, 1%, 0603 VISHAY, CRCW0603100KFKEA 5 1 R11 RES, CHIP, 12kΩ, 5%, 0805 VISHAY, CRCW080512K0JNEA Hardware: For Demo Board Only 1 4 E1, E2, E6, E7 TEST POINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0 2 7 E3, E4, E5, E8, E9, E10, E11 TEST POINT, TURRET, 0.062" MILL-MAX, 2308-2-00-80-00-00-07-0 3 1 JP1 2 x 4 PIN JUMPER, 0.1" SAMTEC, TSW-104-07-L-D 4 4 JP2, JP3, JP4, JP5 3 PIN JUMPER, 2mm SULLINS, NRPN031PAEN-RC 5 1 XJP1 SHUNT, 2 x 2, 0.1" SAMTEC, MNT-102-BK-G 6 4 XJP2, XJP3, XJP4, XJP5 SHUNT, 0.079" SAMTEC, 2SN-BK-G 7 4 STAND-OFF STAND-OFF, NYLON 0.25" KEYSTONE, 8831(SNAP ON) dc2133afa 4 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 E10 E5 E4 E11 E3 E2 C1 1uF 1210 100K 5% R10 INT EXT 5 3. OPTIONAL CIRCUIT FOR EVALUATION WITHOUT BATTERY. 2. VBAT SET BY JP4. DO NOT CHANGE JP4 WITH VIN APPLIED. 1. ALL RESISTORS ARE IN OHMS, 1%, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTES: UNLESS OTHERWISE SPECIFIED GND NTC NTCBIAS GND PROG GND 6.5V - 60V R1 1 5% 0805 3 2 1 JP1 EN 1 3 5 7 ON REG OFF 5 4 3 2 1 CUSTOMER NOTICE R6 100K R5 100K R4 3.01K 2 4 6 8 NTC NTCBIAS PROG EN IN 4 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. FBG FB BAT 6 7 8 9 10 JP3 TIMER SCALE = NONE JOSHUA Y. LT APPROVALS ON OFF TIMER CHRG U1 LTC4079IDD 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. NTC JP2 R2 100K R3 768K 0805 CTMR .068uF TECHNOLOGY ON LED TIMER CHRG GND SEE NOTE 2 E9 E8 E7 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only C2 6.8uF 1210 C3 1uF 1210 BAT 100mA DATE: IC NO. 2 Tuesday, October 14, 2014 DEMO CIRCUIT 2133A LTC4079IDD 1 SHEET 1 2 OF 1 REV. 60V LINEAR CHARGER WITH LOW QUIESCENT CURRENT N/A SIZE R9 12K .5W 1210 LED1 - GRN + VIN R11 12K 5% 0805 E6 JOSHUA Y. SEE NOTE 3 DATE 10-14-14 APPROVED PRODUCTION 1 DESCRIPTION REVISION HISTORY R7 1.07Meg 0805 OFF 1 JP5 TITLE: SCHEMATIC 3 2 1 412K R8 3 SEE NOTE 2 2 1 4.2V VBAT R12 2.55Meg 0805 2 REV 8.4V JP4 _ ECO 2 2 VIN VIN 3 GND 11 E1 4 3 D 5 A B C D DEMO MANUAL DC2133A SCHEMATIC DIAGRAM dc2133afa 5 DEMO MANUAL DC2133A 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 dc2133afa 6 Linear Technology Corporation LT 1014 • REV A PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2014