Linear Technology DC2133A Guida rapida alla configurazione

dc2133afa

DEMO MANUAL DC2133A

DESCRIPTION

LTC4079

60V, 250mA Linear Charger

with Low Quiescent Current

Demonstration circuit 2133A features a simple battery

charger circuit using the LT C

4079 high-voltage mono-

lithic 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 jumper-

selectable 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 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

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

Specifications are at TA= 25°C

Figure 1. Typical Battery Charge Cycle

PARAMETER 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

TIME (HOURS)

100

dc2133a F01

532 4

IBAT (mA)

3.2

3.6

5.2

3.4

3.8

4.6

4.4

4.2

5.0

4.8

VBAT & VCHRG (V)

C/10

TERMINATION

CHRG

240mAh Li-Ion

VIN = 5V

RPROG = 3.01k

CTMR = 0.068µF

IBAT

VBAT

dc2133afa

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.

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:

BAT =

250 • V

PROG

Note: Minimize capacitance on the PROG pin to prevent

charger instability.

5. Allow the battery to charge for a complete cycle. CHRG

willdisabletheLEDwhenthechargecurrenthasdropped

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. Usean external thermistor connectedto 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.

dc2133afa

DEMO MANUAL DC2133A

QUICK START PROCEDURE

Figure 2. Proper Measurement Equipment Setup

–

BATTERY

dc2133afa

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

DEMO MANUAL DC2133A

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

ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTES: UNLESS OTHERWISE SPECIFIED

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

GND

NTC

BAT

100mA

GND

VIN

6.5V - 60V

CHRG

TIMER

NTCBIAS

PROG

.5W

REG

GND

OFF

2. VBAT SET BY JP4. DO NOT CHANGE JP4

WITH VIN APPLIED.

GND

3. OPTIONAL CIRCUIT FOR EVALUATION

WITHOUT BATTERY.

SEE NOTE 3

SEE NOTE 2

VIN

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

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

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

LTC4079IDD

Tuesday, October 14, 2014 1 1

60V LINEAR CHARGER WITH LOW QUIESCENT CURRENT

JOSHUA Y.

N/A

DEMO CIRCUIT 2133A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

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

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

LTC4079IDD

Tuesday, October 14, 2014 1 1

60V LINEAR CHARGER WITH LOW QUIESCENT CURRENT

JOSHUA Y.

N/A

DEMO CIRCUIT 2133A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

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

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

LTC4079IDD

Tuesday, October 14, 2014 1 1

60V LINEAR CHARGER WITH LOW QUIESCENT CURRENT

JOSHUA Y.

N/A

DEMO CIRCUIT 2133A

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

JOSHUA Y.

PRODUCTION

210-14-14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

JOSHUA Y.

PRODUCTION

210-14-14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

JOSHUA Y.

PRODUCTION

210-14-14

6.8uF

1210

6.8uF

1210

100K

R11

12K

0805

R11

12K

0805

R10

100K

R10

100K

E7E7

412K

E9E9

0805

1uF

1210

1uF

1210

JP3

OFF

TIMER

JP3

OFF

TIMER

JP4

8.4V

4.2V

VBAT

JP4

8.4V

4.2V

VBAT

E4E4

E2E2

E10E10

E6E6

E8E8

JP2

EXT

INT

NTC

JP2

EXT

INT

NTC

2JP5

ONOFF

LEDJP5

ONOFF

LED

100K

CTMR

.068uF

CTMR

.068uF

E11E11

1.07Meg

0805

1.07Meg

0805

1uF

1210

1uF

1210

LED1

GRN

LED1

GRN

LTC4079IDD

NTCBIAS

1BAT 10

FB 9

FBG 8

CHRG 7

PROG

TIMER 6

NTC

GND

768K

0805

768K

0805

3.01K

12K

1210

12K

1210

E1E1

JP1JP1

R12

2.55Meg

0805

R12

2.55Meg

0805

E3E3

E5E5

100K

dc2133afa

DEMO MANUAL DC2133A

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 1014 • REV A 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

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

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