FEATURES

n

LTC4162-S

35V/3.2A Lead-Acid

Step-Down Battery Charger with

PowerPath and I

2

C Telemetry

DESCRIPTION

The

LTC

®

4162-S

is an advanced monolithic synchronous

step-down switching battery charger and PowerPath

™

manager that seamlessly manages power distribution

between input sources such as wall adapters, backplanes,

solar panels, etc., and a lead-acid battery.

A high resolution measurement system provides exten-

sive telemetry information for circuit voltages, currents,

battery resistance and temperature which can all be read

back over the I

2

C port. The I

2

C port can also be used to

configure many charging parameters including charging

voltages and currents, termination algorithms and numer-

ous system status alerts.

The LTC4162-S can charge 6V, 12V, 18V and 24V lead-

acid batteries with as much as 3.2A of charge current.

The power path topology decouples the output voltage

from the battery allowing a portable product to start up

instantly under very low battery voltage conditions.

The LTC4162-S is available in a thermally enhanced 28-

pin 4mm × 5mm × 0.75mm QFN surface mount package.

All registered trademarks and trademarks are the property of their respective owners.

n

Lead-Acid Battery Charger with Absorb and Equalize

Wide Charging Input Voltage Range: 4.5V to 35V

High Efficiency Synchronous Operation

16-Bit Digital Telemetry System Monitors V

BAT

,

I

BAT

, R

BAT

, T

BAT

, T

DIE

, V

IN

, I

IN

, V

OUT

Charges 6V, 12V, 18V and 24V Lead-Acid Batteries

Input Undervoltage Charge Current Limit Loop

Input MPPT for Solar Panel Inputs

Input Current Limit Prioritizes System Load Output

Low Loss PowerPath™

Instant-On Operation with Discharged or Missing

Battery

Temperature Controlled Charging

Pin Compatible with Li-Ion and LiFePO

4

Versions

APPLICATIONS

n

Medical Instruments

USB-C Power Delivery

Industrial Handhelds

Ruggedized Notebook

Tablet Computers

TYPICAL APPLICATION

9V to 35V, 3.2A Step-Down Switching Battery Charger with PowerPath

V

IN

V

IN

INFET CLP

I C

SW

CSP

LTC4162-S

CELL

COUNT

CSN

BATSENS+

NTCBIAS

NTC

GND

T

2

Charging Current vs Battery Voltage

3.6

3.2

2.8

CHARGE CURRENT (A)

2.4

2.0

1.6

1.2

0.8

0.4

CC–CV

ABSORB

EQUALIZE

V

IN

= 18V, 12V BATTERY

V

OUT

CLN V

OUT

BATFET

0.0

6.0 7.2 8.4 9.6 10.8 12.0 13.2 14.4 15.6 16.8

BATTERY VOLTAGE (V)

4162S TA01b

4162S TA01a

Rev A

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1

LTC4162-S

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 .......................................................................................... 7

Pin Functions .....................................................................................................................10

Block Diagram....................................................................................................................12

ESD Diagram .....................................................................................................................13

Timing Diagram ..................................................................................................................14

Operation..........................................................................................................................15

Applications Information .......................................................................................................27

Register Descriptions ...........................................................................................................34

Typical Applications .............................................................................................................44

Package Description ............................................................................................................46

Revision History .................................................................................................................47

Typical Application ..............................................................................................................48

Related Parts .....................................................................................................................48

Rev A

2

For more information

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LTC4162-S

ABSOLUTE MAXIMUM RATINGS

(Note 1)

PIN CONFIGURATION

TOP VIEW

PGND

SCL

PGND

22 BATFET

21 CSP

20 CSN

AGND

29

19 BATSENS+

18 CELLS1

17 CELLS0

16 SYNC

15 DV

CC

9 10 11 12 13 14

NTCBIAS

SMBALERT

SDA

NTC

R

T

V

OUT

V

OUT

SW

BATSENS+, V

IN

, CSP, CSN, CLP,

CLN, V

OUT

, V

OUTA

.................................. −0.3V to 36V

CSP to CSN, CLP to CLN ........................................±0.3V

CELLSO, CELLS1, SYNC ..................... −0.3V to INTVCC

DV

CC

......................................................... −0.3V to 5.5V

SDA, SCL,

SMBALERT

............................. −0.3V to DV

CC

I

SW

....................................................................... ±3.5A

Operating Junction Temperature Range

(Notes 2, 4) ............................................ −40 to 125°C

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

28 27 26 25 24 23

BOOST 1

INTV

CC

2

V

OUTA

3

CLN 4

CLP 5

INFET 6

V

IN

7

VCC2P5 8

UFD PACKAGE

28-LEAD (4mm

×

5mm) PLASTIC QFN

T

JMAX

= 125°C,

θ

JA

= 43°C/W,

θ

JC

= 3.4°C/W

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

ORDER INFORMATION

PART NUMBER

LTC4162EUFD-SAD#PBF

LTC4162EUFD-SST#PBF

LTC4162EUFD-SADM#PBF

LTC4162EUFD-SSTM#PBF

LTC4162EUFD-SAD#TRPBF

LTC4162EUFD-SST#TRPBF

LTC4162EUFD-SADM#TRPBF

LTC4162EUFD-SSTM#TRPBF

LTC4162IUFD-SAD#PBF

LTC4162IUFD-SST#PBF

LTC4162IUFD-SADM#PBF

LTC4162IUFD-SSTM#PBF

LTC4162IUFD-SAD#TRPBF

LTC4162IUFD-SST#TRPBF

LTC4162IUFD-SADM#TRPBF

LTC4162IUFD-SSTM#TRPBF

PART

MARKING*

4162H

4162J

4162T

4162U

4162H

4162J

4162T

4162U

4162H

4162J

4162T

4162U

4162H

4162J

4162T

4162U

✓

TAPE AND

REEL

TEMP

GRADE

E

I

DESCRIPTION

I

2

C Adjustable Voltage

Fixed Voltage

I

2

C Adjustable Voltage MPPT ON

Fixed Voltage MPPT ON

I

2

C Adjustable Voltage

Fixed Voltage

I

2

C Adjustable Voltage MPPT ON

Fixed Voltage MPPT ON

I

2

C Adjustable Voltage

Fixed Voltage

I

2

C Adjustable Voltage MPPT ON

Fixed Voltage MPPT ON

I

2

C Adjustable Voltage

Fixed Voltage

I

2

C Adjustable Voltage MPPT ON

Fixed Voltage MPPT ON

TEMPERATURE

RANGE

–40°C to 125°C

Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Tape and reel specifications.

Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.

Rev A

For more information

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3

LTC4162-S

The

l

denotes the specifications which apply over the full specified

operating junction temperature range, otherwise specifications are at T

A

= 25°C (Note 4). V

IN

= 18V, DV

CC

= 3.3V, R

SNSI

= 10mΩ,

R

SNSB

= 10mΩ unless otherwise noted.

SYMBOL

V

IN

V

BAT

I

BATSENS

+

I

VIN

V

CHARGE

PARAMETER

Input Supply Voltage

Battery Voltage

Battery Drain Current

V

IN

– V

BATSENS

+ > V

IN_DUVLO

, Terminated

V

IN

– V

BATSENS

+ < V

IN_DUVLO

V

IN

= 0, SHIPMODE Activated

V

IN

– V

BATSENS

+ > V

IN_DUVLO

, Terminated

CONDITIONS

l

ELECTRICAL CHARACTERISTICS

MIN

4.5

2.7

TYP

MAX

35

UNITS

V

µA

V

mV

%

mV

V

mV

%

MHz

%

mΩ

A

System Voltages and Currents

0.5

54

2.8

115

6–7.8

28.571

1

100

5

200

V

IN

Drain Current

Range

Resolution (6 Bits)

Accuracy

Range

Resolution (5 Bits)

Accuracy

Range

Resolution (6 Bits)

Accuracy

Range

Resolution (8 Bits)

Full Scale Accuracy

Switching Frequency

Maximum Duty Cycle

Primary Switch On-Resistance

Rectifier Switch On-Resistance

Peak Inductor Current Limit

V

IN

Charger Enable

Input Undervoltage Lockout

V

IN

to BATSENS+ Charger Enable

Differential Undervoltage Lockout

V

IN

Charger Disable

Overvoltage Lockout

INTV

CC

Telemetry Enable

Undervoltage Lockout

Switching Battery Charger

Per

6V Battery

l

–0.5

–1.5

0.5

1.5

I

CHARGE

Servo Voltage

(V

CSP

– V

CSN

)

I

INLIM

Servo Voltage

(V

CLP

– V

CLN

)

V

INLIM

f

OSC

D

MAX

R

SWITCH

R

RECT

I

PEAK

System Controls

V

IN_UVLO

V

IN_DUVLO

V

IN_OVLO

V

INTVCC_UVLO

I

CHARGE

= (V

CSP

– V

CSN

)/R

SNSB

Note 5

l

–0.25

–0.75

1–32

1

0.25

0.75

I

IN

= (V

CLP

– V

CLN

)/R

SNSI

Note 6

–0.2

0.5–32

0.5

0.14–36

140.625

1.5

99.5

90

0.2

–1

R

T

= 63.4k

l

1

1.6

1.4

Note 3

Rising Threshold

Hysteresis

Rising Threshold

Hysteresis

Rising Threshold

Hysteresis

Rising Threshold

Hysteresis

4.2

100

37.6

2.75

45mV/R

SNSB

4.4

0.2

150

170

38.6

1.4

2.85

0.12

4.6

200

40

2.95

V

mV

V

Rev A

4

For more information

www.analog.com

LTC4162-S

The

l

denotes the specifications which apply over the full specified

operating junction temperature range, otherwise specifications are at T

A

= 25°C (Note 4). V

IN

= 18V, DVCC = 3.3V, R

SNSI

= 10mΩ,

R

SNSB

= 10mΩ unless otherwise noted.

SYMBOL

I

BAT

(V

CSP

– V

CSN

)

I

IN

(V

CLP

– V

CLN

)

V

IN

PARAMETER

Resolution

Offset Error

Span Error

Resolution

Offset Error

Span Error

Resolution

Offset Error

Span Error

CONDITIONS

I

BAT

= (V

CSP

– V

CSN

)/R

SNSB

0.32mV < V

CSP

– V

CSN

< 32mV

I

IN

= (V

CLP

– V

CLN

)/R

SNSI

0.32mV < V

CLP

– V

CLN

< 32mV

3V < V

IN

< 35V

2V < V

BATSENS

+ < 7.8V

3V < V

OUT

< 35V

0 < V

NTC

/V

NTCBIAS

< 1

MIN

TYP

1.466

MAX

UNITS

µV /LSB

mV

%rdng

µV/LSB

mV

%rdng

mV/LSB

mV

%rdng

µV/LSB

mV

%rdng

mV/LSB

mV

%rdng

µV/V/LSB

mV/V

%rdng

°C/LSB

°C

5.5

0

0b1101000[R/W]

70

30

I

SDA/SMBALERT

= 3mA

1.3

0.6

1.3

0.6

0

100

50

900

400

% DV

CC

% DV

CC

mV

kHz

µs

ns

V

µA

Telemetry A/D Measurement Subsystem

–0.15

–1

–0.15

–1

–25

–1

–10

–1

–25

–1

0.15

1

0.15

1

25

1

10

1

25

1

ELECTRICAL CHARACTERISTICS

1.466

1.649

Resolution

V

BATSENS

+

(Per

6V Battery)

Offset Error

Span Error

V

OUT

V

NTC

/V

NTCBIAS

T_die

Resolution

Offset Error

Span Error

Resolution

Offset Error

Span Error

Resolution

Offset

Logic Reference Level

DV

CC

Current

I

2

C Address

Input High Threshold

Input Low Threshold

Digital Output Low (SDA/SMBALERT)

SCL Clock Frequency

LOW Period of SCL Clock

HIGH Period of SCL Clock

Bus Free Time Between Start and Stop

Conditions

Hold Time, After (Repeated) Start

Condition

Setup Time after a Repeated Start

Condition

Stop Condition Set-Up Time

Output Data Hold Time

Input Data Hold Time

Data Set-Up Time

Input Spike Suppression Pulse Width

192.4

1.653

45.833

0.0215

–264.4

l

Serial Port, SDA, SCL,

SMBALERT

DV

CC

I

DVCCQ

ADDRESS

V

IHI2C

V

ILI2C

V

OLI2C

F

SCL

t

LOW

t

HIGH

t

BUF

t

HD,STA

t

SU,STA

t

SU,STO

t

HD,DAT(OUT)

t

HD,DAT(IN)

t

SU,DAT

t

SP

1.8

SCL/SDA = DV

CC

, 0kHz

Rev A

For more information

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5

参数名称	属性值
功能	电池监控器
电池化学	铅酸
电池数	4
故障保护	过流，超温，过压
接口	I²C
工作温度	-40°C ~ 125°C
封装/外壳	28-WFQFN 裸露焊盘
供应商器件封装	28-QFN（4x5）

LTC4162IUFD-SAD#PBF

LTC4162IUFD-SAD#PBF概述

LTC4162IUFD-SAD#PBF规格参数

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