Linear Technology DC1007C Manual de usuario

dc1007cf

DEMO MANUAL DC1007C

DESCRIPTION

LTC4088

High Efficiency Battery

Charger/Power Manager

Demonstration Circuit 1007 is a high efficiency USB power

manager with PowerPath™control and Li-Ion/Polymer

battery charger featuring the LT C

4088. It includes a syn-

chronous switching input regulator, a full featured battery

charger and an ideal diode. Designed specifically for USB

applications, the LTC4088’s switching regulator automati-

cally limits its input current to either 100mA, 500mA or

1A for wall-powered applications via logic control. There

are also 2.5mA and 500µA suspend modes to prevent the

battery from running down when the product is connected

to a suspended USB bus.

The switching input stage provides power to VOUT where

power sharing between the application circuit and the

battery charger is managed. Unlike linear PowerPath

controllers, the LTC4088’s switching input stage can use

nearly all of the 0.5W or 2.5W available from the USB port

with minimal power dissipation. This feature allows the

LTC4088 to provide more power to the application and L, LT, LTC, LTM, Linear Technology, the Linear logo and PowerPath are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

PERFORMANCE SUMMARY

battery and eases thermal issues in space constrained

applications.

An ideal diode ensures that the system power is available

from the battery when the input current limit is reached or

if the USB or wall supply is removed. The optional external

P-channel MOSFET supplements the internal ideal diode

by reducing RON and increasing efficiency.

A CHRG LED indicates four possible states of the battery

charger. Charging is indicated when the LED is steady-ON.

Not charging is indicated by a steady-OFF. A NTC fault is

indicated by a slow blinking rate (1.5Hz) and a bad battery

is indicated by a fast blinking rate (6.1Hz).

The LTC4088 is available in the low profile 14-Lead

4mm × 3mm × 0.75mm DFN surface mount package.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1007C

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VBUS Input Voltage Range 4.35 5.5 V

VOUT Mode and Load Dependent 3.5 4.7 V

VLDO3V3 3.3V Load and VOUT Dependent 3.3 V

VBAT Output Float Voltage (Constant Voltage Mode) 4.2 V

IBAT Output Charge Current (Constant Current Mode) RPROG Equals 2kΩ 0.5 A

dc1007cf

DEMO MANUAL DC1007C

QUICK START PROCEDURE

Demonstration circuit 1007 is best evaluated using a Li-

Ion/Polymer battery. When using a battery simulator for

evaluation, oscillations must be verified with a real battery

at the same conditions because it is difficult to match the

impedance of a real battery, which is required for battery

charger stability.

Refer to Figure 1 for the proper measurement and equip-

ment setup and follow the procedure below.

1. If using an external supply, connect a 0V to 6V, 1.5A

supply with voltage adjusted to 0V between the VBUS

and GND terminals. Connect a voltmeter across the

VBUS and GND terminals. If using the USB input op-

tion, have cable ready to plug in when all loads and

jumpers are set. Do not use the USB input and an

external supply at the same time.

2. Set JP1, NTC jumper to INT to use the demo board

resistor. To use an external NTC resistor, connect an

NTC resistor between J2 - J3 and the GND terminal.

Then set the NTC jumper to EXT.

3. Use Table 1 to set JP2, JP3, and JP4 (D0, D1, and D2

respectively) to select the desired input current limit

and charger status.

Table 1. Controlled Input Current Limit

D0 D1 D2 CHARGER ILIM

0 0 0 ON 100mA (1×)

0 0 1 OFF 100mA (1×)

0 1 0 ON 500mA (5×)

0 1 1 OFF 500mA (5×)

1 0 0 ON 1A (10×)

1 0 1 OFF 1A (10×)

1 1 0 OFF 500µA (SUSP)

1 1 1 OFF 2.5mA (SUSP)

4. Connect a 0mA to 25mA adjustable load in series

with an ammeter between the 3.3V and GND termi-

nals. Connect a voltmeter between the 3.3V and GND

terminals.

5. Connect a 0A to 2A adjustable load in series with an

ammeter between the VOUT terminal and the GND

terminal. Connect a voltmeter between the VOUT and

GND terminals.

6. Connect a partially charged (~3.6V) lithium-ion bat-

tery with the positive lead to the BAT terminal and the

negative lead to a GND terminal. Connect the positive

lead of a voltmeter to the BAT terminal and the nega-

tive lead to the GND terminal. Connect the positive

terminal of a voltmeter to PROG and the negative

terminal to GND to measure the current ﬂowing into

the battery. The voltage on PROG will read 1V when

the maximum charge current is reached. The voltage

on CLPROG will read 1.188V when the input current

is reached. Observe VOUT and the 3.3V output.

IBAT =

PROG

RPROG

•103

IVBUS =IBUSQ +

CLPROG

• hCLPROG +1

( )

See the data sheet for the proper values of IBUSQ and

hCLPROG in the 1×, 5× and 10× modes.

7. If using the USB input, plug in the USB cable and ob-

serve the charge current, VOUT, and the 3.3V output.

If using an external power supply, slowly increase the

supply and observe that the LTC4088 starts to use

the VBUS input power as the VBUS reaches 4.35V.

dc1007cf

DEMO MANUAL DC1007C

QUICK START PROCEDURE

8. Discharge the battery to 2.5V. If charger mode is on,

observe it is charging in trickle charge mode and

the charge current is 50mA. As the battery voltage

increases above 2.85V observe that the charger goes

into full constant current mode. Observe that VOUT

stays above 3.6V when the input current limit is not

exceeded. Remove the NTC jumper on JP2. Observe

the CHRG LED slow blinking rate. Also observe the

35KHz pulse with varying duty cycle between 4.7%

and95.3%ontheCHRG terminalwithanoscilloscope.

Reinstall the NTC jumper.

9. Increase the VOUT load and observe when the input

current starts to limit (VCLPROG = 1.188V). When input

current limit is reached, VOUT drops from 300mV

above the BAT voltage to 15mV below the BAT volt-

age and the additional load transitions to the battery

through the ideal diode. Due to the high efﬁciency of

the switching regulator, the charge and load current

maybesigniﬁcantlyabovetheinputcurrentdepending

on the voltage on the BAT pin.

10. Repeat step 9 with different current limit modes.

11. Set the VBUS input supply to 5V. Observe the battery

current as the battery voltage increases above 4.1V.

The charge current starts to decrease as the battery

voltage increases towards 4.2V.

See the latest LTC4088 data sheet for more information

on how this part performs.

dc1007cf

DEMO MANUAL DC1007C

APPLICATION INFORMATION

This demo circuit is designed to demonstrate the full

capability of the LTC4088 high efficiency battery charger.

Not all components are required in all applications. The

critical circuit components are on the top of the board

near the IC and listed in the Required Circuit Components

section of the Parts List

The input capacitor network of C7 and R13 is used to

dampen source lead inductances that commonly occur in

laboratory setups with twisted leads and a bench power

supply. When using an USB cable or adaptor cable this

input damping network will likely not be required. Please

note that the in-circuit capacitance of the specified 10µF,

0805 ceramic ceramic capacitor for C2 and C7 is approxi-

mately 5µF each at a VBUS greater than 4.25V.

Capacitor C4 is only required when using the 10× mode.

The LTC4088 requires a minimum of 10µF on the OUT

pin in 10×mode for voltage loop stability. As an alterna-

tive to using two smaller X5R capacitors, one larger X5R

ceramic capacitor would be acceptable, provided that the

actual in-circuit capacitance with 4.2V applied is greater

than 10µF.

Capacitor C5 is included to simulate a low impedance bat-

tery. It is especially helpful when testing the demo circuit

with a battery simulator comprised of a standard power

supply with a 3.6Ω power resistor across it. The leads

connecting the power supply to the demo circuit should

be a twisted pair to minimize lead inductance;although,

even twisted pairs can introduce enough inductance into

the circuit to cause instability in the battery charger sec-

tion without the presence of C5. Capacitor C5 will also

provide proper operation of the circuit without a battery

present. Refer to the data sheet for more discussion of

operation without a battery. If desired, it is possible to use

a ceramic capacitor in series with a low valued resistor to

stabilize the battery charger when no battery is present.

Please refer to the data sheet for the suggested capacitor

and resistance range.

When not using the 3.3V LDO (LDO3V3) connect VOUT

to LDO3V3 by installing R12 and removing C1.

dc1007cf

DEMO MANUAL DC1007C

Figure 1. Proper Measurement Equipment Setup for DC1007C

APPLICATION INFORMATION

dc1007cf

DEMO MANUAL DC1007C

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP, CHIP, X5R, 1.0µF, 6.3V, 0402 MURATA, GRM155R60J105ME19D

2 1 C2 CAP, CHIP, X5R, 10µF, 10V, 0805 MURATA, GRM21BR61A106KE19L

3 1 C3 CAP, CHIP, X5R, 22µF, 6.3V, 0805 MURATA, GRM21BR60J226ME39L

4 1 C6 CAP, CHIP, X7R, 0.1µF, 16V, 0402 MURATA, GRM155R71C104KA88D

5 1 L1 IND, 3.3µH, 0.08Ω, 2.2A COILCRAFT, LPS4018-332MRC

6 1 R5 RES, 0402 2.94k 1% 1/16W VISHAY, CRCW04022K94FKED

7 2 R6, R7 RES, 0402 2k 1% 1/16W VISHAY, CRCW04022K00FKED

8 1 R14 RES, 0402 8R 25Ω 1% 1/16W VISHAY, CRCW04028R25FNED

9 1 U1 IC, USB BAT CHARGER/POWER MANAGER, DFN-14 LTC4088EDE

Additional Demo Board Circuit Components

10 1 C4 CAP, CHIP, X5R, 22µF, 6.3V, 0805 MURATA, GRM155R60J105ME19D

11 1 C5 CAP, CHIP OS-CON, 100µF, 6.3V, B6 PANASONIC, 6SVPC100MY

12 1 C7 CAP, CHIP, X5R, 10µF, 10V, 0805 MURATA, GRM21BR61A106KE19L

13 1 D1 LED 565NM GRN DIFF 0603 SMD LUMEX OPTO/COMPONENTS INC,

SML-LX0603GW-TR

14 1 Q1 XSTR, MOSFET P-CHANNEL SILICONIX, Si2333DDS

15 2 R1, R2 RES, 0402, 100k, 1%, 1/16W VISHAY, CRCW0402100KFKED

16 4 R3, R4, R8, R9 RES, 0402 0R 0Ω 1/16W VISHAY CRCW04020000Z0ED

17 1 R10 RES, 0402 510Ω 1% 1/10W VISHAY CRCW0402 5100 1%

18 0 R11 (OPT) RES., OPTION, 0402 OPT

19 0 R12 (OPT) RES, 0402 0R 0Ω 1/16W VISHAY CRCW04020000Z0ED

20 1 R13 RES., 1Ω, 1%, 1/16W, 0402 VISHAY, CRCW04021R00FKED

Hardware: For Demo Board Only

21 1 J1 CONN, USB MINI-B TYCO 440247-1

22 6 E1, E2, E8, E9, E10, E11 TEST POINT, TURRET, 0.094", MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

23 10 E3, E4, E5, E6, E7, E12, E13, E14,

E15, E16

TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0

24 4 JP1, JP2, JP3, JP4 HEADER, 3 PINS 2mm COMM 2802S-03G2

25 4 STANDOFFS KEYSTONE, 8831

dc1007cf

DEMO MANUAL DC1007C

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

4 4

3 3

2 2

1 1

INTEXT

4.35V - 5.5V

NTC

CHRG

CURRENT

LIMIT

1A (10X)

500mA (5X)

500uA (SUSP)

100mA (1X)

2.5mA (SUSP)

100mA (1X)

OFF

INPUT CURRENT LIMIT SETTINGS

OFF

VBUS

3.5V - 4.7V

OPT

1A (10X)

CHARGER

STATUS

3.3V

25mA

OFF

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

DEMO CIRCUIT 1007C

High Efficiency Battery Charger / USB Power Manager

N/A

LTC4088EDE

7 - 25 - 16

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

DEMO CIRCUIT 1007C

High Efficiency Battery Charger / USB Power Manager

N/A

LTC4088EDE

7 - 25 - 16

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

DEMO CIRCUIT 1007C

High Efficiency Battery Charger / USB Power Manager

N/A

LTC4088EDE

7 - 25 - 16

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PROTOTYPE

-1 7 - 25 - 16

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PROTOTYPE

-1 7 - 25 - 16

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PROTOTYPE

-1 7 - 25 - 16

USBMINI-B

VBUS 1

D- 2

D+ 3

ID 4

GND 5

R10

510

10uF

10V

0805

TP2 D+

E10 BAT

FLOAT=4.2V

0.5A

0.00

E11

GND

R14

8.25

TP3 ID

GND

100K

22uF

6.3V

0805

R12

OPT

JP4

100uF

6.3V

OS-CON

2 1

JP3

E14

C/X

R11

OPT

GRN

GND

0.00

TP1 D-

22uF

6.3V

0805

JP1

E7 LDO3V3

Si2333DDS

3 2

E16

GND

E12

CHRG

R13

1.0

100K

NTC

0.1uF

16V

0402

1uF

6.3V

0402

2.94K

0.00

E15

PROG

JP2

DF3-3P-2DSA

BAT

GND

EXT. NTC

LTC4088EDE

VBUS

GND

SW 12

NTC

PROG

C/X

CLPROG

BAT 9

GATE 8

VOUT 10

LDO3V3 3

CHRG 7

E8 VOUT

E13

CLPROG

3.3uH

LPS4018-332M

10uF

10V

0805

dc1007cf

DEMO MANUAL DC1007C

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 1116 • 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

Mouser Electronics

Authorized Distributor

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