Linear Technology DC2133A, LTC4079 Demo Manual

DESCRIPTION

dc2133a F01

DEMO MANUAL DC2133A

LTC4079

60V, 250mA Linear Charger

with Low Quiescent Current

Demonstration circuit 2133A features a simple battery

®

charger circuit using the LTC

4079 high-voltage mono-

lithic linear charger. The DC2133 has an input voltage

from 2.7V to 60V and is capable of supplying up

range 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.

DC2133A is initially configured to enable charging from application of V

PERFORMANCE SUMMARY

PARAMETER CONDITIONS TYPICAL VALUE

Input Voltage Range 2.7V to 60V

Default Charging Voltage V

Default Charging Current R

PROG Pin Voltage R

Input Regulation Voltage EN = REG (JP1) 10.3V

Default Charge Timer C

above the LTC4079 UVLO threshold.

IN

Specifications are at TA = 25°C

= 4.2 4.2V

BAT

= 3.01k 99mA

PROG

= 3.01k, I

PROG

= 0.068μF 3h 45 min

TMR

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.

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

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.

= 99mA 2.5V

CHG

100

90

80

70

60

(mA)

50

BAT

I

40

30

20

10

0

240mAh Li-Ion

= 5V

V

IN

= 3.01k

R

PROG

= 0.068µF

C

TMR

V

BAT

0

1

I

BAT

TIME (HOURS)

CHRG

C/10

TERMINATION

Figure 1. Typical Battery Charge Cycle

5.2

5.0

4.8

V

4.6

BAT

& V

4.4

CHRG

4.2

(V)

4

3.8

3.6

3.4

3.2

532 4

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1

DEMO MANUAL DC2133A

I

250 • V

PROG

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.

1. The jumpers are initially set as below for a typical 4.2V charging application:

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 representa

-

tion of the output current according to the relationship:

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.

Optional

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 V

BAT

jumper, JP4. Alternatively, the feedback resistors may be adjusted for custom values, according to the battery voltage.

PROG

R

BAT

=

Note: Minimize capacitance on the PROG pin to prevent

charger instability.

Note: DO NOT change the V

with VIN applied.

BAT

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2

QUICK START PROCEDURE

+ –

v

DEMO MANUAL DC2133A

A

+

V

BATTERY

Figure 2. Proper Measurement Equipment Setup

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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

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)

3 PIN JUMPER, 2mm SULLINS, NRPN031P

AEN-RC

4

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DEMO MANUAL DC2133A

5

4

3

2

1

SCHEMATIC DIAGRAM

2

10-14-14

BAT

E6E6

JOSHUA Y.

SEE NOTE 3

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PRODUCTION

2

_

VIN

100mA

SEE NOTE 2

C3

1uF

C3

1uF

R11

12K

R11

12K

5%

R7

1.07Meg

R12

2.55Meg

R12

2.55Meg

E7E7

1210

0805

0805R71.07Meg

0805

GND

EN

C2

ON

1356

2

6.8uF

VBAT

4

1210

REG

132

JP4

8.4V

U1

LTC4079IDD

OFF

78

JP1JP1

SEE NOTE 2

4.2V

10

BAT

IN

1

R8

9

8

FB

EN2PROG

3

FBG

E8E8

412KR8412K

R4

CHRG

VIN

7

CHRG

NTCBIAS

4

3.01KR43.01K

6

TIMER

NTC

5

GRN

LED1

R9

12K

1210

R9

12K

1210

.5W

-

+

-

+

3

2

1

GND

11

R5

100KR5100K

LEDJP5

LED

JP5

TIMER

E9E9

132

OFF

ONOFF

TIMER

R6

100KR6100K

ON

CTMR

.068uF

CTMR

.068uF

JP3

www.linear.com

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

LTC4079IDD

TECHNOLOGY

IC NO. REV.

SCHEMATIC

60V LINEAR CHARGER WITH LOW QUIESCENT CURRENT

SIZE

TITLE:

LT

JOSHUA Y.

APPROVALS

PCB DES.

APP ENG.

1

SHEET OF

DEMO CIRCUIT 2133A

2

Tuesday, October 14, 2014 1 1

N/A

DATE:

SCALE = NONE

3

R3

768K

0805R3768K

0805

D D

E1E1

VIN

R110805

R110805C11uF

5%

6.5V - 60V

E2E2

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.

1210C11uF

1210

R2

GND

100KR2100K

CUSTOMER NOTICE

132

JP2

EXT

R10

5%

100K

E11E11

GND

E4E4

E5E5

NTCBIAS

NTC

E10E10

GND

E3E3

PROG

C C

INT

NTC

B B

CUSTOMER NOTICE

4

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

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

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

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

ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTES: UNLESS OTHERWISE SPECIFIED

1. ALL RESISTORS ARE IN OHMS, 1%, 0603.

2. VBAT SET BY JP4. DO NOT CHANGE JP4

A A

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

5

WITH VIN APPLIED.

WITHOUT BATTERY.

3. OPTIONAL CIRCUIT FOR EVALUATION

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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

Linear Technology Corporation

6

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

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LT 1014 • REV A PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2014