FeaTures

n

LT3650-8.2/LT3650-8.4

High Voltage 2 Amp

Monolithic 2-Cell

Li-Ion Battery Charger

DescripTion

The LT

®

3650 is a complete monolithic 2-cell Li-Ion/Polymer

battery charger that operates over a 9V to 32V input volt-

age range (11.5V minimum start-up voltage). The LT3650

provides a constant-current/constant-voltage charge

characteristic, with maximum charge current externally

programmable up to 2A, set using an external current

sense resistor. A precondition feature trickle-charges a

low voltage battery, and bad-battery detection provides a

signal and suspends charging if a battery does not respond

to preconditioning.

The LT3650 can be configured to terminate charging when

charge current falls to C/10, or one-tenth the programmed

maximum current. Once charging is terminated, the LT3650

enters a low current (85µA) standby mode. An auto-restart

feature starts a new charging cycle if the battery voltage

drops 2.5% from the float voltage, or if a new battery is

inserted into a charging system.

The LT3650 contains a user-programmable internal safety

timer (typically set to a three hour full cycle time). The IC

can be configured to use this internal timer if a time-based

termination scheme is desired in which charging can con-

tinue below C/10 until a desired time is reached.

The LT3650 is available in a low profile (0.75mm) 3mm ×

3mm 12-pin DFN and 12-pin MSOP packages.

n

Wide Input Voltage Range: 9V to 32V (40V Absolute

Maximum)

Programmable Charge Current: Up to 2A

User-Selectable Termination: C/10 or Onboard

Termination Timer

Dynamic Charge Rate Programming/Soft-Start Pin

Programmable Input Current Limit

1MHz Fixed Frequency

Average Current Mode Control

0.5% Float Voltage Accuracy

5% Charge Current Accuracy

2.5% C/10 Detection Accuracy

NTC Resistor Temperature Monitor

Auto-Recharge at 97.5% Float Voltage

Auto-Precondition at <70% Float Voltage

Bad-Battery Detection with Auto-Reset

Binary Coded Open-Collector Status Pins

3mm × 3mm DFN-12 or MSOP-12 Package

applicaTions

n

Industrial Handheld Instruments

12V to 24V Automotive and Heavy Equipment

Desktop Cradle Chargers

Notebook Computers

L,

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

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

Typical applicaTion

11.5V to 32V 2-Cell 2A Charger

V

IN

11.5V TO 32V

CMSH3-40MA

V

IN

10µF

CLP

LT3650-8.2

SHDN

CHRG

FAULT

0.68µF

TIMER

BAT

NTC

RNG/SS

10µF

SENSE

0.05

SW

1µF

BOOST

CMPSH1-4

10µH

CMSH3-40MA

Charge Current, Efficiency and Power Loss vs Time

3.0

CHARGE CURRENT (A), POWER LOSS (W)

2.5

2.0

1.5

1.0

0.5

0

V

IN

= 20V

95

EFFICIENCY

POWER

LOSS

CHARGE

CURRENT

85

75

65

55

45

35

20 40 60 80 100 120 140 160 180 200

TIME (MINUTES)

365082 TA01b

EFFICIENCY (%)

+

BATTERY

0

365082 TA01a

36508284fd

1

LT3650-8.2/LT3650-8.4

absoluTe MaxiMuM raTings

(Note 1)

V

IN

............................................................................40V

SHDN, CHRG, FAULT

...............................V

IN

+ 0.5V, 40V

CLP .........................................................V

IN

± 0.5V, 40V

SW ............................................................................40V

SW-V

IN

.....................................................................4.5V

BOOST .................................................... SW + 10V, 50V

SENSE, BAT ..............................................................10V

SENSE-BAT ............................................... –0.5V to 0.5V

TIMER, RNG/SS, NTC ..............................................2.5V

Operating Junction Temperature Range

(Note 2).................................................. –40°C to 125°C

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

Lead Temperature (Soldering, 10 sec)

MSE .................................................................. 300°C

pin conFiguraTion

TOP VIEW

V

IN

CLP

SHDN

CHRG

FAULT

TIMER

1

2

3

4

5

6

13

12 SW

11 BOOST

10 SENSE

9 BAT

8 NTC

7 RNG/SS

V

IN

CLP

SHDN

CHRG

FAULT

TIMER

1

2

3

4

5

6

TOP VIEW

12

11

10

9

8

7

SW

BOOST

SENSE

BAT

NTC

RNG/SS

13

DD PACKAGE

12-LEAD (3mm

×

3mm) PLASTIC DFN

T

JMAX

= 125°C,

θ

JA

= 43°C/W,

θ

JC

= 3°C/W

EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB

MSE PACKAGE

12-LEAD PLASTIC MSOP

T

JMAX

= 125°C,

θ

JA

= 43°C/W,

θ

JC

= 3°C/W

EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB

orDer inForMaTion

LEAD FREE FINISH

LT3650EDD-8.2#PBF

LT3650IDD-8.2#PBF

LT3650EDD-8.4#PBF

LT3650IDD-8.4#PBF

LT3650EMSE-8.2#PBF

LT3650IMSE-8.2#PBF

LT3650EMSE-8.4#PBF

LT3650IMSE-8.4#PBF

TAPE AND REEL

LT3650EDD-8.2#TRPBF

LT3650IDD-8.2#TRPBF

LT3650EDD-8.4#TRPBF

LT3650IDD-8.4#TRPBF

LT3650EMSE-8.2#TRPBF

LT3650IMSE-8.2#TRPBF

LT3650EMSE-8.4#TRPBF

LT3650IMSE-8.4#TRPBF

PART MARKING*

LDXT

LFGR

365082

365084

PACKAGE DESCRIPTION

12-Lead (3mm × 3mm) Plastic DFN

12-Lead Plastic MSOP

TEMPERATURE RANGE

–40°C to 85°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 nonstandard 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/

36508284fd

2

LT3650-8.2/LT3650-8.4

elecTrical characTerisTics

SYMBOL

LT3650

V

IN

V

IN(OVLO)

V

IN(UVLO)

V

BAT(FLT)

V

IN

Operating Range

V

IN

Start Voltage

OVLO Threshold

OVLO Hysteresis

UVLO Threshold

UVLO Hysteresis

Battery Float Voltage

(Note 3)

V

IN

Rising

V

IN

Rising

LT3650-8.2

l

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at V

IN

= 20V, BOOST-SW = 4V,

SHDN

= 2V, SENSE = BAT = V

BAT(FLT)

, C

TIMER

= 0.68µF.

PARAMETER

CONDITIONS

MIN

9

32

35

1

8.7

0.2

8.16

8.12

8.36

8.32

8.2

8.4

–200

5.65

5.80

90

CC/CV Mode, Switch-On, I

SW

= 0

Standby Mode

Shutdown (SHDN = 0)

Switch-On, I

SW

= 0

2.5V < V

(BOOST – SW)

< 8.5V

I

SW

= 2A

V

IN

– V

SW

, I

SW

= 2A

l

TYP

MAX

32

11.5

40

UNITS

V

8.24

8.28

8.44

8.48

V

mV

V

mV

LT3650-8.4

l

∆V

RECHRG

V

BAT(PRE)

V

BAT(PREHYST)

I

VIN

I

BOOST

I

BOOST

/I

SW

V

SW(ON)

I

SW(MAX)

V

SENSE(PRE)

V

CLP(DC)

I

CLP

V

SENSE(DC)

V

SENSE(C/10)

I

BAT

I

SENSE

V

NTC(H)

V

NTC(L)

V

NTC(HYST)

R

NTC(DIS)

I

NTC

I

RNG/SS

V

RNG/SS

/ V

SENSE

V

SHDN

V

SHDN(HYST)

I

SHDN

Recharge Battery Threshold

Battery Precondition Threshold Voltage

Battery Precondition Threshold

Hysteresis

Operating Input Supply Current

Threshold Voltage Relative to V

BAT(FLT)

LTC3650-8.2

LTC3650-8.4

2.5

85

15

20

30

350

2.5

15

3.5

mA

µA

mA

mA/A

mV

A

mV

BOOST Supply Current

BOOST Switch Drive

Switch-On Voltage Drop

Switch Current Limit

Precondition Current Sense Voltage

CLP Threshold Voltage

CLP Input Bias Current

Maximum Current Sense Voltage

C/10 Trigger Sense Voltage

BAT Input Bias Current

SENSE Input Bias Current

NTC Range Limit (High)

NTC Range Limit (Low)

NTC Threshold Hysteresis

NTC Disable Impedance

NTC Bias Current

I

RNG/SS

Bias Current

Current Limit Programming:

V

RNG/SS

/V

SENSE(MAX)

Shutdown Threshold

Shutdown Hysteresis

SHDN

Input Bias Current

V

SENSE

– V

BAT

V

BAT

= 5

V

CLP

– V

IN

; V

SENSE

– V

BAT

= 50mV

l

37.5

95

7.5

50

200

100

10

0.1

62.5

105

12.5

1

1.45

0.315

mV

nA

mV

µA

V

%

kΩ

V

SENSE

– V

BAT

; V

BAT

= 7.5V, V

RNG/SS

= 1.2V

l

Charging Terminated

V

NTC

Rising

V

NTC

Falling

% of Threshold

Minimum External Impedance to GND

V

NTC

= 0.8V

V

RNG/SS

= 0.5

Rising

l

1.25

0.27

250

47.5

45

8.5

1.17

1.36

0.29

20

500

50

10

1.20

120

–10

l

52.5

55

11.5

1.23

µA

V/V

V

mV

nA

36508284fd

3

LT3650-8.2/LT3650-8.4

elecTrical characTerisTics

SYMBOL

V

CHRG

, V

FAULT

I

TIMER

V

TIMER(DIS)

t

TIMER

PARAMETER

Status Low Voltage

Charge/Discharge Current

Timer Disable Threshold

Full Charge Cycle Timeout

Precondition Timeout

Timer Accuracy

f

O

DC

Operating Frequency

Duty Cycle Range

Continuous Operation

l

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at V

IN

= 20V, BOOST-SW = 4V,

SHDN

= 2V, SENSE = BAT = V

BAT(FLT)

, C

TIMER

= 0.68µF.

CONDITIONS

10mA Load

l

MIN

TYP

25

MAX

0.4

UNITS

V

µA

V

hr

min

0.1

0.25

3

22.5

–10

0.9

15

1

10

1.1

90

%

MHz

%

Note 1:

Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2:

The LT3650E is guaranteed to meet performance specifications

from 0°C to 85°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT3650I specifications are

guaranteed over the full –40°C to 85°C temperature range. High junction

temperatures degrade operating lifetimes.

Note 3:

V

IN

voltages below the start threshold are only supported if

(V

BOOST

– V

SW

) > 2V.

Typical perForMance characTerisTics

Battery Float Voltage

vs Temperature

100

0.10

95

I

VIN

CURRENT (µA)

90

T

A

= 25°C, unless otherwise noted.

Maximum Charge Current vs

RNG/SS Voltage; I

CHG(MAX)

(as a

Percentage of Programmed I

MAX

)

100

V

IN

Standby Mode Current

vs Temperature

80

I

CHG(MAX)

(%)

50

0

25

TEMPERATURE (°C)

0.05

∆V

BAT(FLT)

(%)

0

85

80

75

70

60

40

–0.05

20

– 0.10

–50

–25

50

25

0

75

TEMPERATURE (°C)

100

125

65

–50

–25

75

100

365082 G02

0

0.2

0.4

365082 G01

0.8

0.6

V

RNG/SS

1.0

1.2

365082 G03

36508284fd

4

LT3650-8.2/LT3650-8.4

Typical perForMance characTerisTics

Switch Drive (I

SW

/I

BOOST

)

vs Switch Current

36

33

SWITCH FORWARD DROP (mV)

30

27

24

I

SW

/I

BOOST

21

18

15

12

9

6

3

0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

SWITCH CURRENT (A)

365082 G04

480

460

440

I

SENSE

(µA)

420

400

380

360

340

320

–50

–25

50

25

0

75

TEMPERATURE (°C)

100

125

T

A

= 25°C, unless otherwise noted.

CC/CV Charging; SENSE Pin Bias

Current vs V

SENSE

LT3650-8.2

Switch Forward Drop (V

IN

– V

SW

)

vs Temperature

I

SW

= 2A

100

50

0

–50

–100

–150

–200

–250

–300

–350

0

0.5

1

1.5

365082 G05

2 2.5 5.5

V

SENSE

(V)

6

8

8.5

365082 G06

12

C/10 Threshold vs Temperature

(V

SENSE

– V

BAT

)

51.0

50.8

CLP Input Limit Threshold

(V

CLP

– V

IN

) vs Temperature

I

CHG

at 50%

101.0

100.8

100.6

V

SENSE

– V

BAT

(mV)

100.4

100.2

100.0

99.8

99.6

99.4

99.2

–25

50

25

0

75

TEMPERATURE (°C)

100

125

I

MAX

Current Limit (V

SENSE

– V

BAT

)

vs Temperature

V

BAT

= 7.5V

11

V

SENSE

– V

BAT

(mV)

V

CLP

– V

IN

(mV)

50.6

50.4

50.2

50.0

49.8

49.6

49.4

49.2

10

9

8

–50

–25

50

25

0

75

TEMPERATURE (°C)

100

125

49.0

–50

99.0

–50

–25

365082 G07

365082 G08

50

25

0

75

TEMPERATURE (°C)

100

125

365082 G09

Thermal Foldback – I

MAX

Current Limit (V

SENSE

– V

BAT

)

vs Temperature

120

100

V

SENSE

– V

BAT

(mV)

80

60

40

20

0

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

–0.2

–0.4

CC/CV Charging; BAT Pin Bias

Current vs V

BAT

LT3650-8.2

10

9

8

BATTERY CURRENT (µA)

7

6

5

4

3

2

1

0

0.5

1

1.5

2 2.5

V

BAT

(V)

3

3.5

8

8.5

0

Battery Bias Current with Charger

Disabled (I

BAT

+ I

SENSE

+ I

BOOST

+ I

SW

)

I

BAT

(mA)

V

IN

FLOATING

V

IN

= 20V, V

SHDN

= 0V

0

1

2

3

5

V

BAT

(V)

4

6

7

8

9

25 35 45 55 65 75 85 95 105 115 125 135

TEMPERATURE (°C)

365082 G10

365082 G11

365082 G12

36508284fd

5

参数名称	属性值
Product Attribute	Attribute Value
制造商 Manufacturer	ADI(亚德诺半导体)
产品种类 Product Category	Battery Management
RoHS	Details
产品 Product	Charge Management
Battery Type	Li-Ion, Li-Polymer
工作电源电压 Operating Supply Voltage	32 V
封装 / 箱体 Package / Case	MSOP-12
系列 Packaging	Tube
安装风格 Mounting Style	SMD/SMT
Development Kit	DC1473A-A, DC1473A-B
工厂包装数量 Factory Pack Quantity	185

	LT3650IMSE-8.2#PBF	LT3650IDD-8.2#TRPBF	LT3650IMSE-8.4#TRPBF	LT3650IDD-8.2#PBF	LT3650EMSE-8.4#TRPBF
描述	Battery Management High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger	Battery Management High Voltage 2 Amp Monolithic Li-Ion Battery Charger	Battery Management High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger	电池管理 High Voltage 2 Amp Monolithic Li-Ion Battery Charger	电池管理 High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger
Product Attribute	Attribute Value	Attribute Value	Attribute Value	-	-
制造商 Manufacturer	ADI(亚德诺半导体)	ADI(亚德诺半导体)	ADI(亚德诺半导体)	-	-
产品种类 Product Category	Battery Management	Battery Management	Battery Management	-	-
RoHS	Details	Details	Details	-	-
产品 Product	Charge Management	Charge Management	Charge Management	-	-
Battery Type	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	-	-
工作电源电压 Operating Supply Voltage	32 V	32 V	32 V	-	-
封装 / 箱体 Package / Case	MSOP-12	DFN-12	MSOP-12	-	-
系列 Packaging	Tube	Reel	Reel	-	-
安装风格 Mounting Style	SMD/SMT	SMD/SMT	SMD/SMT	-	-
Development Kit	DC1473A-A, DC1473A-B	DC1473A-A, DC1473A-B	DC1473A-A, DC1473A-B	-	-
工厂包装数量 Factory Pack Quantity	185	2500	2500	-	-

LT3650IMSE-8.2#PBF

LT3650IMSE-8.2#PBF概述

LT3650IMSE-8.2#PBF规格参数

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