DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A...

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1 dc1621af DEMO MANUAL DC1621A DESCRIPTION LTM8062: 32V, 2A μModule Power Tracking Battery Charger Demonstration circuit 1621A features the LTM ® 8062, a 32V, 2A μModule ® power tracking battery charger. The demonstration circuit is designed to operate from a 9.75V to 32V input source, and to charge a 2-cell battery pack to a float voltage of 7.2V. The float voltage can easily be changed to a higher or lower voltage by adjusting the values of R2 and R3. R7 and R9 keep the converter off until the input has reached 8.5V, typically. JP2 allows for L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Table 1. Typical Specifications of the Demo Board (T A = 25°C) PARAMETER VALUE Input Supply Range 9.75V to 32V Output Voltage Accuracy 7.19V to 7.3V Typical Output Current Limit 2A BOARD PHOTO PERFORMANCE SUMMARY easy selection of C/10 or timer charge termination. The LTM8062 data sheet must be read in conjunction with this quick start guide for working on or modifying the demo circuit 1621A. Design files for this circuit board are available at http://www.linear.com/demo

Transcript of DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A...

Page 1: DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration

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DEMO MANUAL DC1621A

DESCRIPTION

LTM8062: 32V, 2A µModule Power

Tracking Battery Charger

Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration circuit is designed to operate from a 9.75V to 32V input source, and to charge a 2-cell battery pack to a fl oat voltage of 7.2V. The fl oat voltage can easily be changed to a higher or lower voltage by adjusting the values of R2 and R3. R7 and R9 keep the converter off until the input has reached 8.5V, typically. JP2 allows for

L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

Table 1. Typical Specifications of the Demo Board (TA = 25°C)

PARAMETER VALUE

Input Supply Range 9.75V to 32V

Output Voltage Accuracy 7.19V to 7.3V

Typical Output Current Limit 2A

BOARD PHOTO

PERFORMANCE SUMMARY

easy selection of C/10 or timer charge termination. The LTM8062 data sheet must be read in conjunction with this quick start guide for working on or modifying the demo circuit 1621A.

Design fi les for this circuit board are available at http://www.linear.com/demo

Page 2: DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration

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DEMO MANUAL DC1621A

QUICK START PROCEDURE

Demonstration circuit 1621A is easy to set up to evaluate the performance of the LTM8062.

Using short twisted pairs of leads for any power connection, with all loads and power supplies off, refer to Figure 1 for the proper measurement and equipment setup.

Follow the procedure below:

1. Jumper and Power Supply Setting:

JP1 = ON PS1 = OFF

JP2 = C/10 PS2 = OFF

2. Turn on PS2 and slowly increase the voltage to 4.5V while monitoring the current into the BAT pin. If the current is less than 5mA, turn on PS1. Increase the voltage on PS1 to 8V while monitoring the input cur-rent. If the current is less than 5mA, increase PS1 to 12V.

3. Verify that the battery charging current, IBAT , is between 250mA and 350mA. The CHRG LED should be on and the FAULT LED should be off.

4. Increase PS2 until VBAT is 6.3V. Verify the input current, IIN, is between 1A and 1.5A, the battery current, IBAT , is between 1.775A and 2.225A and that the CHRG LED is on.

5. Increase PS2 until VBAT is 7.4V. Verify the battery charging current, IBAT , is less than 5mA and that the CHRG LED is off.

6. Decrease PS2 until VBAT is 6.8V. Verify the battery current, IBAT , is between 1.775A and 2.225A and that the CHRG LED is on.

7. Set JP1 to off. Verify the charging current, IBAT , is less than 5mA and that the FAULT LED and the CHRG LED are off.

8. Set JP1 to on. Connect a jumper from the NTC pin to ground. Verify the charging current, IBAT , is less than 5mA and that the FAULT LED and the CHRG LED are on.

9. Remove the jumper from NTC to ground. Verify the charging current, IBAT , is between 1.775A and 2.225A and that the FAULT LED is off and the CHRG LED is on.

10. At this point, vary PS1 between the 9.75V to 32V range if desired, and verify the charging current is between 1.775A and 2.225A and that the CHRG LED is on.

11. This concludes the test. Turn off PS1 and PS2.

Page 3: DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration

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DEMO MANUAL DC1621A

QUICK START PROCEDURE

Figure 1. DC1621A Proper Equipment Setup

AM1

VM1

++

+

POWERSUPPLY

PS1

AM2

DC1621 F01

3Ω20WVM2

+

++

––

POWERSUPPLY

PS2

IBAT (mA)0

80

EFFI

CIEN

CY (%

)

81

82

83

1000

87

DC1621 F02

500 1500 2000

84

85

86 VINA = 12V

VINA = 24V

IBAT (mA)0

0

INPU

T CU

RREN

T (m

A)

200

1000

1400

1200

DC1621 F03

500 1500 2000

400

600

800

1000

VINA = 12V

VINA = 24V

Figure 2. Effi ciency vs IBAT , 7.2V Float Figure 3. Input Current vs IBAT , 7.2V Float

Page 4: DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration

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DEMO MANUAL DC1621A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components for DC1621A

2 1 C3 Cap. ,SMT, 22μF, 50V, 20% Sanyo, 50CE22BS

3 1 C4 Cap., X5R, 10μF, 35V, 20%, 1210 Taiyo Yuden, GMK325BJ106MN-T

5 1 C6 Cap., X5R, 0.68μF, 10V, 20%,0603 AVX, 0603YD684KAT

12 1 R2 Res., Chip, 549k, 0.1%, 0603 Vishay, TNPW0603549KBKEA

13 1 R3 Res., Chip, 459k, 0.1%, 0603 Vishay, TNPW0603459KBKEA

19 1 U1 I.C. LTM8062, LGA-77-15 ×9 Linear Technology Corporation LTM8062EV

Additional Demo Board Circuit Components

1 0 C1, C2 OPT

4 1 C5 Cap., X5R, 47μF, 16V, 20%, 1210 Taiyo Yuden, EMK325BJ476MM-T

6 1 D1 LED-LN Green Panasonic, LN1351CTR

7 1 D2 LED-LN Red Panasonic, LN1251CTR

11 1 R1 Res., Chip, 0Ω 1/16W 1 AMP, 1206 Vishay, CRCW12060000Z0EA

14 1 R4 Res, Chip, 0.1Ω, 1/8W, 1%,1206 Vishay, WSL1206R1000FEA

15 3 R6, R8, R12 Res., Chip, 0Ω 1/16W , 0603 Vishay, CRCW06030000Z0EA

16 1 R7 Res., Chip, 604k, 1%, 0603 Vishay, CRCW0603604KFKEA

17 1 R9 Res., Chip, 100k, 1%, 0603 Vishay, CRCW0603100KFKEA

18 2 R10, R11 Res., Chip, 5.1k, 1%, 1206 Vishay, CRCW12065K10FKEA

Hardware for Demo Board Only

8 8 E1, E2, E3, E5, E6, E7, E8, E9 Turret, Testpoint Mill Max 2501-2-00-80-00-00-07-0

9 2 JP1, JP2 Headers, 3 Pins 2mm Ctrs. Samtec TMM-103-02-L-S

10 2 XJP1, XJP2 Shunt, 2mm Ctrs. Samtec 2SN-BK-G

Page 5: DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration

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DEMO MANUAL DC1621A

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.

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Page 6: DC1621A-LTM8062 Evaluation Kit Quick Start Guide · 2018. 3. 19. · Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration

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DEMO MANUAL DC1621A

Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2010

LT 0810 • PRINTED IN USA

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 direc-tive 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 applica-tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation