LTC4155IUFD,LTC4155IUFD pdf中文资料,LTC4155IUFD引脚图,LTC4155IUFD电路-Datasheet-电子工程世界

LTC4155

Dual-Input Power Manager/

3.5A Li-Ion Battery Charger with

I

2

C Control and USB OTG

FEATURES

n

DESCRIPTION

The LTC

®

4155 is a 15 watt I

2

C controlled power manager

with PowerPath™ instant-on operation, high efficiency

switching battery charging and USB compatibility. The

LTC4155 seamlessly manages power distribution from

two 5V sources, such as a USB port and a wall adapter,

to a single-cell rechargeable Lithium-Ion/Polymer battery

and a system load.

The LTC4155’s switching battery charger automatically

limits its input current for USB compatibility, or may

draw up to 3A from a high power wall adapter. The high

efficiency step-down switching charger is designed to

provide maximum power to the application and reduced

heat in high power density applications.

I

2

C adjustability of input current, charge current, battery

float voltage, charge termination, and many other param-

eters allows maximum flexibility. I

2

C status reporting of

key system and charge parameters facilitates intelligent

control decisions. USB On-The-Go support provides 5V

power back to the USB port without any additional com-

ponents. A dual-input, priority multiplexing, overvoltage

protection circuit guards the LTC4155 from high voltage

damage on the V

BUS

pin.

The LTC4155 is available in the low profile (0.75mm)

28-lead 4mm

×

5mm QFN surface mount package.

High Efficiency Charger Capable of 3.5A

Charge Current

Monolithic Switching Regulator Makes Optimal

Use of Limited Power and Thermal Budget

Dual-Input Overvoltage Protection Controller

Priority Multiplexing for Multiple Inputs

I

2

C/SMBus Control and Status Feedback

NTC Thermistor ADC for Temperature Dependent

Charge Algorithms (JEITA)

Instant-On Operation with Low Battery

Battery Ideal Diode Controller for Power

Management

USB On-The-Go Power Delivery to the USB Port

Full Featured Li-Ion/Polymer Battery Charger with

Four Float Voltage Settings

28-Lead 4mm

×

5mm QFN Package

APPLICATIONS

n

Tablet PCs

Ultra Mobile PCs

Video Media Players

Digital Cameras, GPS, PDAs

Smart Phones

Portable Medical Devices

L,

LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks

are the property of their respective owners.

TYPICAL APPLICATION

I

2

C Controlled High Power Battery Charger/USB Power Manager

1μH

WALLSNS

WALLGT

V

IN

10μF

3.6k

3

USBGT

USBSNS

ID

I

2

C

IRQ

GND CLPROG2 CLPROG1 PROG V

C

1.21k

499Ω

V

BUS

LTC4155

SW

V

OUT

CHGSNS

BATGATE

BATSNS

NTCBIAS

NTC

OVGCAP

47nF

4155 TA01a

Switching Regulator Efficiency

100

90

80

EFFICIENCY (%)

70

60

50

40

30

20

10

0

0.5

V

BAT

= 3.9V

1.0 1.5 2.0

2.5

LOAD CURRENT (A)

3.0

3.5

4155 TA01b

TO

SYSTEM

LOAD

22μF

100k

4155fc

1

LTC4155

TABLE OF CONTENTS

Features ............................................................................................................................ 1

Applications ....................................................................................................................... 1

Typical Application ............................................................................................................... 1

Description......................................................................................................................... 1

Absolute Maximum Ratings ..................................................................................................... 3

Order Information ................................................................................................................. 3

Pin Configuration ................................................................................................................. 3

Electrical Characteristics ........................................................................................................ 4

Typical Performance Characteristics .......................................................................................... 9

Pin Functions .....................................................................................................................12

Block Diagram....................................................................................................................15

Timing Diagrams ................................................................................................................16

Operation..........................................................................................................................17

I

2

C ........................................................................................................................................................................ 17

Applications Information .......................................................................................................40

Typical Applications .............................................................................................................47

Package Description ............................................................................................................51

Typical Application ..............................................................................................................52

Related Parts .....................................................................................................................52

4155fc

2

LTC4155

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2)

PIN CONFIGURATION

TOP VIEW

V

BUS

V

BUS

V

OUTSNS

V

BUS

22 V

OUT

21 V

OUT

20 CHGSNS

29

GND

19 CHGSNS

18 PROG

17 BATGATE

16 BATSNS

15 NTC

9 10 11 12 13 14

USBGT

OVGCAP

NTCBIAS

WALLGT

V

C

SCL

SW

V

BUS

(Transient) t < 1ms, Duty Cycle < 1% ... –0.3V to 7V

V

BUS

(Steady State), BATSNS,

IRQ,

NTC...... –0.3V to 6V

DVCC, SDA, SCL (Note 3) ........................–0.3V to V

MAX

I

WALLSNS

, I

USBSNS

............................................... ±20mA

I

NTCBIAS

, I

IRQ

..........................................................10mA

I

SW

, I

VOUT

, I

CHGSNS

(Both Pins in Each Case)..............4A

Operating Junction Temperature Range ... –40°C to 125°C

Storage Temperature Range .................. –65°C to 150°C

28 27 26 25 24 23

SDA 1

DVCC 2

IRQ

3

ID 4

CLPROG1 5

CLPROG2 6

WALLSNS 7

USBSNS 8

UFD PACKAGE

28-LEAD (4mm 5mm) PLASTIC QFN

T

JMAX

= 125°C,

θ

JA

= 43°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

LTC4155EUFD#PBF

LTC4155IUFD#PBF

TAPE AND REEL

LTC4155EUFD#TRPBF

LTC4155IUFD#TRPBF

PART MARKING*

4155

PACKAGE DESCRIPTION

28-Lead (4mm × 5mm × 0.75mm) Plastic QFN

TEMPERATURE RANGE

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping

container.Consult LTC Marketing for information on non-standard lead based finish parts.

For more information on lead free part marking, go to:

http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to:

http://www.linear.com/tapeandreel/

4155fc

3

LTC4155

ELECTRICAL CHARACTERISTICS

SYMBOL

V

BUS

V

BUSREG

I

VBUSQ

PARAMETER

Input Supply Voltage

Undervoltage Current Reduction

Input Quiescent Current

Input Undervoltage Current Limit Enabled

USB Suspend Mode

100mA I

VBUS

Mode, I

VOUT

= 0μA, Charger Off

500mA – 3A I

VBUS

Modes, I

VOUT

= 0μA, Charger Off

V

BUS

> V

UVLO

, Battery Charger Off, I

VOUT

= 0μA

V

BUS

= 0V, I

VOUT

= 0μA

Storage and Shipment Mode, DVCC = 0V

100mA I

VBUS

Mode (USB Lo Power) (Default)

500mA I

VBUS

Mode (USB Hi Power)

600mA I

VBUS

Mode

700mA I

VBUS

Mode

800mA I

VBUS

Mode

900mA I

VBUS

Mode (USB 3.0)

1.00A I

VBUS

Mode

1.25A I

VBUS

Mode

1.50A I

VBUS

Mode

1.75A I

VBUS

Mode

2.00A I

VBUS

Mode

2.25A I

VBUS

Mode

2.50A I

VBUS

Mode

2.75A I

VBUS

Mode

3.00A I

VBUS

Mode (Default)

2.5mA I

VBUS

Mode (USB Suspend)

4.05V Setting (Default)

4.10V Setting

4.15V Setting

4.20V Setting

12.50% Charge Current Mode

18.75% Charge Current Mode

25.00% Charge Current Mode

31.25% Charge Current Mode

37.50% Charge Current Mode

43.75% Charge Current Mode

50.00% Charge Current Mode

56.25% Charge Current Mode

62.50% Charge Current Mode

68.75% Charge Current Mode

75.00% Charge Current Mode

81.25% Charge Current Mode

87.50% Charge Current Mode

93.75% Charge Current Mode

100.0% Charge Current Mode (Default)

100.0% Charge Current Mode, R

PROG

= 340Ω

Suspend Mode, I

VOUT

= 1mA

Battery Charger Enabled, Charging, BATSNS ≥ 3.5V

Battery Charger Terminated or Battery Charger

Disabled

Battery Charger Enabled, Charging, BATSNS ≤ 3.3V

3.40

l

The

l

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at T

A

≈

T

J

= 25°C (Note 2). V

BUS

= 5V, BATSNS = 3.7V, DVCC = 3.3V,

R

CLPROG1

= R

CLPROG2

= 1.21k, R

PROG

= 499Ω, unless otherwise noted.

CONDITIONS

l

MIN

4.35

TYP

MAX

5.5

UNITS

V

mA

Switching Battery Charger

4.30

0.060

0.560

17

7.0

2.0

0.6

65

460

550

650

745

800

950

1150

1425

1650

1900

2050

2350

2550

2800

4.02

4.07

4.12

4.17

290

430

590

730

880

1025

1180

1330

1485

1635

1780

1915

2065

2210

2350

3.44

80

480

570

670

770

850

1000

1230

1500

1750

2000

2175

2475

2725

2950

1.8

4.05

4.10

4.15

4.20

315

465

620

770

925

1075

1230

1385

1535

1685

1835

1980

2130

2280

2430

3.57

4.35

BATSNS

4.35

3.50

3.0

1.25

100

500

600

700

800

900

1025

1300

1575

1875

2125

2300

2600

2900

3100

2.5

4.08

4.13

4.18

4.23

340

500

650

810

970

1125

1280

1440

1585

1735

1890

2045

2195

2350

2500

3.70

4.5

I

BATQ

Battery Drain Current

μA

mA

V

mA

A

V

I

VBUSLIM

Total Input Current When Load

Exceeds Power Limit

l

V

FLOAT

BATSNS Regulated Output Voltage

Selected by I

2

C Control.

Switching Modes

Regulated Battery Charge Current

Selected by I

2

C Control

l

I

CHARGE

I

CHARGE(MAX)

V

OUT

Regulated Battery Charge Current

PowerPath Regulated Output

Voltage (V

BUS

Power Available)

V

OUT(MIN)

Low Battery Instant-On Output

Voltage (V

BUS

Power Available)

4155fc

4

LTC4155

ELECTRICAL CHARACTERISTICS

SYMBOL

I

VOUT

PARAMETER

V

OUT

Current Available Before

Loading Battery

The

l

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at T

A

≈

T

J

= 25°C (Note 2). V

BUS

= 5V, BATSNS = 3.7V, DVCC = 3.3V,

R

CLPROG1

= R

CLPROG2

= 1.21k, R

PROG

= 499Ω, unless otherwise noted.

CONDITIONS

2.5mA I

VBUS

Mode (USB Suspend)

100mA I

VBUS

Mode, BAT = 3.3V

500mA I

VBUS

Mode, BAT = 3.3V

600mA I

VBUS

Mode, BAT = 3.3V

700mA I

VBUS

Mode, BAT = 3.3V

800mA I

VBUS

Mode, BAT = 3.3V

900mA I

VBUS

Mode, BAT = 3.3V

1.00A I

VBUS

Mode, BAT = 3.3V

1.25A I

VBUS

Mode, BAT = 3.3V

1.50A I

VBUS

Mode, BAT = 3.3V

1.75A I

VBUS

Mode, BAT = 3.3V

2.00A I

VBUS

Mode, BAT = 3.3V

2.25A I

VBUS

Mode, BAT = 3.3V

2.50A I

VBUS

Mode, BAT = 3.3V

2.75A I

VBUS

Mode, BAT = 3.3V

3.00A I

VBUS

Mode, BAT = 3.3V

12.50% Charge Current Mode

18.75% Charge Current Mode

25.00% Charge Current Mode

31.25% Charge Current Mode

37.50% Charge Current Mode

43.75% Charge Current Mode

50.00% Charge Current Mode

56.25% Charge Current Mode

62.50% Charge Current Mode

68.75% Charge Current Mode

75.00% Charge Current Mode

81.25% Charge Current Mode

87.50% Charge Current Mode

93.75% Charge Current Mode

100.0% Charge Current Mode (Default)

Threshold Voltage Relative to V

FLOAT

1-Hour Mode

2-Hour Mode

4-Hour Mode (Default)

8-Hour Mode

Rising Threshold

Hysteresis

BATSNS < (V

LOWBAT

– ΔV

LOWBAT

)

C/10 Mode (I

CHARGE

= 10%FS) (Default)

C/5 Mode (I

CHARGE

= 20%FS)

C/20 Mode (I

CHARGE

= 5%FS)

C/50 Mode (I

CHARGE

= 2%FS)

96.6

0.95

1.90

3.81

7.63

2.65

0.47

110

230

15

50

MIN

1

TYP

1.3

76

673

810

944

1093

1200

1397

1728

2072

2411

2700

2846

3154

3408

3657

150

225

300

375

450

525

600

675

750

825

900

975

1050

1125

1200

97.6

1.06

2.12

4.24

8.48

2.8

130

0.53

120

240

24

60

1000

CLPROG1 I

VBUS

Mode

990

98.4

1.17

2.33

4.66

9.32

2.95

0.59

130

250

33

70

MAX

UNITS

mA

mV

%

Hours

V

mV

Hours

mV

mA/mA

V

PROG

PROG Pin Servo Voltage

V

RECHRG

t

TERMINATE

Recharge Battery Threshold

Voltage

Safety Timer Termination Period

Selected by I

2

C Control. Timer

Starts When BATSNS ≥ V

FLOAT

Threshold Voltage

Bad Battery Termination Time

Full Capacity Charge Indication

PROG Voltage Selected by I

2

C

Control

Ratio of I

CHGSNS

to PROG Pin

Current

Ratio of Measured V

BUS

Current to

CLPROG1 Sense Current

V

LOWBAT

t

BADBAT

V

C/x

h

PROG

h

CLPROG1

(Note 4)

4155fc

5

LTC4155IUFD

LTC4155IUFD概述

文档预览

推荐资源