LTC4009-1_15,LTC4009-1_15 pdf中文资料,LTC4009-1_15引脚图,LTC4009-1

FeaTures

n

LTC4009

LTC4009-1/LTC4009-2

High Efficiency,

Multi-Chemistry

Battery Charger

DescripTion

The LTC

®

4009 is a constant-current/constant-voltage

battery charger controller. It uses a synchronous quasi-

constant frequency PWM control architecture that will

not generate audible noise with ceramic bulk capacitors.

Charge current is set by the combination of external

sense, input and programming resistors. With no built-in

termination, the LTC4009 family charges a wide range of

batteries under external control.

The LTC4009 features a fully adjustable output voltage, while

the LTC4009-1 and LTC4009-2 can be pin-programmed for

lithium-ion/polymer battery packs of 1-, 2-, 3- or 4-series

cells. The LTC4009-1 provides output voltage of 4.1V/cell,

and the LTC4009-2 is a 4.2V/cell version.

The device includes AC adapter input current limiting which

maximizes the charge rate for a fixed input power level. An

external sense resistor programs the input current limit, and

the

ICL

status pin indicates when the battery charge current

is being reduced as a result of AC adapter current limiting.

The

CHRG

status pin is active during all charging modes,

including special indication for low charge current.

n

General Purpose Battery Charger Controller

Efficient 550kHz Synchronous Buck PWM Topology

±0.5% Output Float Voltage Accuracy

Programmable Charge Current: 4% Accuracy

Programmable AC Adapter Current Limit:

3% Accuracy

No Audible Noise with Ceramic Capacitors

Wide Input Voltage Range: 6V to 28V

Wide Output Voltage Range: 2V to 28V

Indicator Outputs for AC Adapter Present, Charging,

C/10 Current Detection and Input Current Limiting

Analog Charge Current Monitor

Micropower Shutdown

Thermally Enhanced 20-Pin 4mm

×

4mm

×

0.75mm

QFN Package

applicaTions

n

Notebook Computers

Portable Instruments

Battery Backup Systems

L,

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

PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks

are the property of their respective owners. Protected by U.S. Patents including 5723970.

Typical applicaTion

FROM

ADAPTER

13V TO 20V

33m

0.1µF

DCIN

14.3k

1.5k

CLP

0.1µF

5.1k

100

20µF

POWER TO

SYSTEM

Efficiency at DCIN = 20V

10000

95

EFFICIENCY (%)

90

85

80

75

70

POWER LOSS

V

OUT

= 12.3V

R

SENSE

= 33m

R

IN

= 3.01k

R

PROG

= 26.7k

D

IN

= SSB44

L = IHLP-2525CZ 6.8µH

0

0.5

1.0

1.5

2.0

CHARGE CURRENT (A)

2.5

1000

CLN

DCDIV BOOST

LTC4009

TGATE

CHRG

SW

INTV

DD

BGATE

GND

CSP

0.1µF

EFFICIENCY

POWER LOSS (mW)

TO/FROM

MCU

ACP

ICL

SHDN

ITH

6.04k

0.1µF

2µF

6.8µH

3.01k

33m

CSN

BAT

PROG

FBDIV

301k

V

FB

32.8k

3.01k

CHARGE

CURRENT

MONITOR

20µF

+

100

3.0

4.7nF

26.7k

12.3V

Li-Ion

BATTERY

4009 TA01a

4009 TA01b

4009fd

LTC4009

LTC4009-1/LTC4009-2

absoluTe MaxiMuM raTings

(Note 1)

DCIN, CLP, CLN or SW to GND................... –0.3V to 30V

CLP to CLN ............................................................±0.3V

CSP, CSN or BAT to GND ........................... –0.3V to 28V

CSP to CSN ............................................................±0.3V

BOOST to GND ........................................... –0.3V to 36V

BOOST to SW............................................... –0.3V to 7V

DCDIV,

SHDN,

FVS0, FVS1 or V

FB

to GND ... –0.3V to 7V

ACP, CHRG

or

ICL

to GND .......................... –0.3V to 30V

Operating Temperature Range

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

Junction Temperature (Note 3) ............................. 125°C

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

pin conFiguraTion

LTC4009

TOP VIEW

INTV

DD

BOOST

BGATE

TGATE

SW

LTC4009-1

LTC4009-2

BOOST

TOP VIEW

INTV

DD

BGATE

15 CSP

14 CSN

21

13 PROG

12 ITH

11 BAT

6

SHDN

7

ACP

8

CHRG

9 10

FVS0

FVS1

TGATE

SW

20 19 18 17 16

CLN 1

CLP 2

DCIN 3

ICL

4

DCDIV 5

6

SHDN

7

ACP

8

CHRG

9 10

FBDIV

V

FB

21

15 CSP

14 CSN

13 PROG

12 ITH

11 BAT

CLN 1

CLP 2

DCIN 3

ICL

4

DCDIV 5

20 19 18 17 16

UF PACKAGE

20-LEAD (4mm 4mm) PLASTIC QFN

T

JMAX

= 125°C,

θ

JA

= 37°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

UF PACKAGE

20-LEAD (4mm 4mm) PLASTIC QFN

T

JMAX

= 125°C,

θ

JA

= 37°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

orDer inForMaTion

LEAD FREE FINISH

LTC4009CUF#PBF

LTC4009CUF-1#PBF

LTC4009CUF-2#PBF

LTC4009IUF#PBF

LTC4009IUF-1#PBF

LTC4009IUF-2#PBF

TAPE AND REEL

LTC4009CUF#TRPBF

LTC4009CUF-1#TRPBF

LTC4009CUF-2#TRPBF

LTC4009IUF#TRPBF

LTC4009IUF-1#TRPBF

LTC4009IUF-2#TRPBF

PART MARKING*

4009

40091

40092

4009

40091

40092

PACKAGE DESCRIPTION

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

TEMPERATURE RANGE

0°C to 85°C

–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/

4009fd

LTC4009

LTC4009-1/LTC4009-2

elecTrical characTerisTics

SYMBOL

V

TOL

PARAMETER

V

BAT

Accuracy (See Test Circuits)

Charge Voltage Regulation

LTC4009

C-Grade

I-Grade

LTC4009-1/LTC4009-2

C-Grade

FVS1 = 0V, FVS0 = 0V, I-Grade

FVS1 = 0V, FVS1 = 5V, I-Grade

FVS1 = 5V, FVS0 = 0V, I-Grade

FVS1 = 5V, FVS1 = 5V, I-Grade

I

VFB

R

ON

I

LEAK-FBDIV

V

BOV

V

FB

Input Bias Current

FBDIV On-Resistance

FBDIV Output Leakage Current

V

FB

Overvoltage Threshold

BAT Overvoltage Threshold

Charge Current Regulation

I

TOL

Charge Current Accuracy with R

IN

= 3.01k,

6V < BAT < 18V (LTC4009),

6V < BAT < 15V (LTC4009-1, LTC4009-2)

Current Sense Amplifier Gain (PROG

∆I)

with

R

IN

= 3.01k, 6V < BAT < 18V (LTC4009),

6V < BAT < 15V (LTC4009-1, LTC4009-2)

R

PROG

= 26.7k

C-Grade

I-Grade

V

SENSE

= 0mV, PROG = 1.2V

A

I

V

CS-MAX

V

C10

V

REV

V

CL

I

CLN

V

ICL

OVR

I

DCO

I

CLPO

V

CBT

V

CNT

V

OVP

Shutdown

V

ACP

V

ACP(HYST)

I

DCDIV

V

IL

DCDIV AC Present Threshold Voltage

DCDIV ACP Threshold Hysteresis Voltage

DCDIV Input Current

SHDN

Input Voltage Low

DCDIV = 1.2V

l

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)

CONDITIONS

MIN

–0.5

–0.8

–1.0

–0.6

–0.8

–1.1

–1.15

–1.25

–1.35

±20

l

TYP

MAX

0.5

0.8

1.0

0.6

0.8

1.1

1.15

1.25

1.35

UNITS

%

nA

Ω

µA

V

%

V

FB

= 1.2V

I

LOAD

= 100µA

SHDN

= 0V, FBDIV = 0V

LTC4009

LTC4009-1/LTC4009-2, Relative to

Selected Output Voltage

–1

1.235

103

85

0

1.281

106

190

1

1.32

109

–4

–5

–9.5

–12.75

–1.78

–11.67

–1.66

4

5

9.5

–10.95

–1.54

%

µA

V

SENSE

Step from 0mV to 5mV,

PROG = 1.2V

l

Maximum Peak Current Sense Threshold Voltage ITH = 2V, C-Grade

per Cycle (R

IN

= 3.01k)

ITH = 2V, I-Grade

ITH = 5V

C/10 Indicator Threshold Voltage

Reverse Current Threshold Voltage

Current Limit Threshold

PROG Falling

CLP – CLN

C-Grade

I-Grade

CLN = CLP

(CLP – CLN) – V

CL

DCIN and CLP

No Gate Loads

CLP = 20V, No Gate Loads

CLP – DCIN, CLP Rising

DCIN – CLP CLP Falling

,

DCDIV Rising

140

125

340

180

97

96

92

–8

6

195

325

400

253

100

±100

–5

250

265

430

460

295

103

104

108

–2

28

mV

nA

mV

V

mA

mV

V

mV

Input Current Regulation

l

CLN Input Bias Current

ICL

Indicator Threshold

Operating Voltage Range

DCIN Operating Current

CLP Operating Current

CLP Boost Threshold Voltage

CLP Normal Threshold Voltage (Note 5)

DCDIV Overvoltage Protection Threshold

DCIN, CLP Supplies

1.5

0.5

l

2

0.8

60

1.9

10

1.75

25

1.825

110

V

OVP(HYST)

DCDIV OVP Threshold Hysteresis

DCDIV Rising

l

1.13

–1

1.2

50

0

1.27

1

300

V

mV

µA

mV

4009fd

LTC4009

LTC4009-1/LTC4009-2

elecTrical characTerisTics

SYMBOL

V

IH

R

IN

I

DCS

I

CLPS

I

LEAK-BAT

I

LEAK-CSN

I

LEAK-CSP

I

LEAK-SW

PARAMETER

SHDN

Input Voltage High

SHDN

Pull-Down Resistance

DCIN Shutdown Current

CLP Shutdown Current

BAT Leakage Current

CSN Leakage Current

CSP Leakage Current

SW Leakage Current

SHDN

= 0V

CLP = 12V,

SHDN

= 0V or DCDIV = 0V

SHDN

= 0V or DCDIV = 0V,

0V ≤ CSP = CSN = BAT ≤ 20V

SHDN

= 0V or DCDIV = 0V,

0V ≤ CSP = CSN = BAT ≤ 20V

SHDN

= 0V or DCDIV = 0V,

0V ≤ CSP = CSN = BAT ≤ 20V

SHDN

= 0V or DCDIV = 0V,

0V ≤ SW ≤ 20V

No Load

I

DD

= 20mA

INTV

DD

= 0V

CLP – BAT, CLP Rising

C-Grade

I-Grade

ITH = 1.4V

467

C

LOAD

= 3.3nF

C

LOAD

= 3.3nF

C

LOAD

= 3.3nF 10% – 90%

,

C

LOAD

= 3.3nF 90% – 10%

,

C

LOAD

= 3.3nF 10% – 90%

,

C

LOAD

= 3.3nF 90% – 10%

,

C

LOAD

= 3.3nF 10% – 10%

,

20

98

50

l

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)

CONDITIONS

l

MIN

1.4

TYP

50

215

9

MAX

UNITS

V

kΩ

µA

18

1.5

2

µA

–1.5

–1

0

INTV

DD

Regulator

INTV

DD

∆V

DD

I

DD

V

CE

I

ITH

f

TYP

f

MIN

DC

MAX

t

R-TG

t

F-TG

t

R-BG

t

F-BG

t

NO

V

IL

V

IH

I

IN

V

OL

I

LEAK

I

C10

Output Voltage

Load Regulation

Short-Circuit Current (Note 6)

Charge Enable Threshold Voltage

l

4.85

5

–0.4

85

5.15

–1

130

V

%

mA

Switching Regulator

l

65

60

100

–40/+90

550

25

99

60

50

60

110

135

140

633

mV

µA

kHz

%

ITH Current

Typical Switching Frequency

Minimum Switching Frequency

Maximum Duty Cycle

TGATE Rise Time

TGATE Fall Time

BGATE Rise Time

BGATE Fall Time

TGATE, BGATE Non-Overlap Time

Input Voltage Low

Input Voltage High

Input Current

Output Voltage Low

Output Leakage

CHRG

C/10 Current Sink

110

ns

Float Voltage Select Inputs (LTC4009-1/LTC4009-2 Only)

0.5

3.5

0V ≤ V

IN

≤ 5V

I

LOAD

= 100µA, PROG = 1.2V

SHDN

= 0V, DCDIV = 0V, V

OUT

= 20V

CHRG

= 2.5V

l

V

µA

mV

µA

–10

10

500

Indicator Outputs

–10

15

25

10

38

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 LTC4009C is guaranteed to meet performance specifications

over the 0°C to 85°C operating temperature range. The LTC4009I is

guaranteed to meet performance specifications over the –40°C to 125°C

operating temperature range.

Note 3:

Operating junction temperature T

J

(in °C) is calculated from

the ambient temperature T

A

and the total continuous package power

dissipation P

D

(in watts) by the formula T

J

= T

A

+ (θ

JA

• PD). Refer to the

Applications Information section for details.

Note 4:

All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to GND, unless otherwise

specified.

Note 5:

This threshold is guaranteed to be satisfied if CLP = DCIN when

the LTC4009 exits shutdown.

Note 6:

Output current may be limited by internal power dissipation. Refer

to the Applications Information section for details.

4009fd

LTC4009

LTC4009-1/LTC4009-2

TesT circuiTs

LTC4009

FROM ICL

(CLP = CLN)

LTC4009-1

LTC4009-2

FROM ICL

(CLP = CLN)

1.2085V

–

+

EA

1.2085V

–

+

EA

PROG

13

V

FB

10

1.2085V

TARGET

ITH

12

PROG

13

BAT

11

TARGET VARIES

WITH FVS0,1

ITH

12

+

LTC1055

+

LTC1055

–

4009 TC01

0.6V

–

4009 TC02

0.6V

(T

A

= 25°C unless otherwise noted. D

IN

= SSB44, L = IHLP-2525 6.8µH)

Efficiency at DCIN = 20V, BAT = 8V

100

R

SENSE

= 33m

R

IN

= 3.01k

10000

Typical perForMance characTerisTics

Efficiency at DCIN = 20V, BAT = 12V

100

R

SENSE

= 33m

R

IN

= 3.01k

POWER LOSS

EFFICIENCY

10000

95

EFFICIENCY (%)

POWER LOSS

90

EFFICIENCY

85

1000

95

EFFICIENCY (%)

POWER LOSS (mW)

90

1000

85

80

0

0.5

1.0

1.5

2.0

CHARGE CURRENT (A)

2.5

100

3.0

4009 G01

80

0

0.5

1.0

1.5

2.0

CHARGE CURRENT (A)

2.5

100

3.0

4009 G02

Efficiency at DCIN = 20V, BAT = 16V

100

R

SENSE

= 33m

R

IN

= 3.01k

EFFICIENCY

POWER LOSS

10000

0.10

0.08

0.06

V

FB

ERROR (%)

0.04

POWER LOSS (mW)

V

FB

Line Regulation

LTC4009 TEST CIRCUIT

300

275

250

225

R

ON

( )

200

175

150

125

100

5

10

20

15

CLP (V)

25

30

4009 G04

FBDIV R

ON

vs BAT

CLP = BAT + 3V

(CLP ≥ 6V)

95

EFFICIENCY (%)

0.02

0

–0.02

–0.04

–0.06

–0.08

90

1000

85

80

0

0.5

1.0

1.5

2.0

CHARGE CURRENT (A)

2.5

100

3.0

4009 G03

–0.10

75

0

5

15

10

BAT (V)

20

25

4009 G05

4009fd

LTC4009-1_15

LTC4009-1_15概述

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