MCP73842T-420I/UN_技术文档

MCP73841/2/3/4

M

Advanced Single or Dual Cell Lithium-Ion/

Lithium-Polymer Charge Management Controllers

Features

Description

• Linear Charge Management Controllers

• High-Accuracy Preset Voltage Regulation:

- + 0.5% (max)

• Four Preset Voltage Regulation Options:

- 4.1V - MCP73841-4.1, MCP73843-4.1

- 4.2V - MCP73841-4.2, MCP73843-4.2

- 8.2V - MCP73842-8.2, MCP73844-8.2

- 8.4V - MCP73842-8.4, MCP73844-8.4

• Programmable Charge Current

• Programmable Safety Charge Timers

• Preconditioning of Deeply Depleted Cells

• Automatic End-of-Charge Control

• Optional Continuous Cell Temperature

Monitoring (MCP73841 and MCP73842)

The MCP7384X family of devices are highly advanced

linear charge management controllers for use in

space-limited, cost-sensitive applications. The

MCP73841 and MCP73842 combine high accuracy,

constant-voltage, constant-current regulation, cell pre-

conditioning, cell temperature monitoring, advanced

safety timers, automatic charge termination and

charge status indication in space-saving, 10-pin

MSOP packages. The MCP73841 and MCP73842

provide complete, fully-functional, stand-alone charge

management solutions.

The MCP73843 and MCP73844 employ all the

features of the MCP73841 and MCP73842, with the

exception of the cell temperature monitor. The

MCP73843 and MCP73844 are offered in 8-pin MSOP

packages.

The MCP73841 and MCP73843 are designed for

applications utilizing single-cell Lithium-Ion or Lithium-

Polymer battery packs. Two preset voltage regulation

options are available (4.1V and 4.2V) for use with either

coke or graphite anodes. The MCP73841 and

MCP73843 operate with an input voltage range of 4.5V

to 12V.

• Charge Status Output for Direct LED Drive

• Automatic Power-Down when Input Power

Removed

• Temperature Range: -40°C to 85°C

• Packaging: MSOP-10 - MCP73841, MCP73842

MSOP-8 - MCP73843, MCP73844

The MCP73842 and MCP73844 are designed for

applications utilizing dual series cell Lithium-Ion or

Lithium-Polymer battery packs. Two preset voltage

regulation options are available (8.2V and 8.4V). The

MCP73842 and MCP73844 operate with an input

voltage range of 8.7V to 12V.

Applications

• Lithium-Ion/Lithium-Polymer Battery Chargers

• Personal Data Assistants

• Cellular Telephones

• Hand-Held Instruments

• Cradle Chargers

• Digital Cameras

The MCP7384X family of devices are fully specified

over the ambient temperature range of -40°C to +85°C.

• MP3 Players

Package Types

10-Pin MSOP

Typical Application Circuit

SENSE

V_DD

STAT1

EN

DRV

V_BAT

V_SS

TIMER

THERM

1

2

3

4

5

10

9

8

7

6

1A Lithium-Ion Battery Charger

MA2Q705

NDS8434

100 mΩ

5V

Single

Lithium-Ion

Cell

+

-

THREF

10 µF

1

8

SENSE DRV

8-Pin MSOP

2

3

4

7

6

5

V_DD

V_BAT

V_SS

1

SENSE

V_DD

STAT1

EN

8

7

6

5

DRV

V_BAT

V_SS

10 µF

STAT1

2

3

4

EN TIMER

0.1 µF

100 kΩ

TIMER

MCP73843

2004 Microchip Technology Inc.

DS21823B-page 1

MCP73841/2/3/4

Functional Block Diagram

V_DD

V_REF

V_DD

1 kΩ

–

+

DRV

Charge Current

SENSE

Control Amplifier

90 kΩ

Charge

Current

Amplifier

+

Voltage Control

Amplifier

–

+

-

12 kΩ

10 kΩ

V_REF

Charge

V_REF

V_BAT

Termination

Comparator

90 kΩ

10 kΩ

300 kΩ

+

-

Charge_ok

Precon

Precondition

I_REG/10

Precondition

Control

(825 kΩ)

Comp.

+

-

UVLO

Comparator

+

-

74.21 kΩ

Constant-Voltage/

Recharge Comp.

V_UVLO

+

-

0.79 kΩ

EN

Power-On

Delay

V_REF

150.02 kΩ

V_UVLO

Bias and

V_REF(1.2V)

Reference

Generator

5.15 kΩ

(4.29 kΩ)

THREF

THERM

V_SS

100 kΩ

Temperature

Comparators

STAT1

+

-

Drv Stat 1

Charge_ok

Charge Control,

50 kΩ

Charge Timers,

And

I_REG/10

+

-

Status Logic

Oscillator

MCP73841 and MCP73842 Only

TIMER

DS21823B-page 2

2004 Microchip Technology Inc.

MCP73841/2/3/4

*Notice: Stresses above those listed under “Maximum

Ratings” may cause permanent damage to the device. This is

a stress rating only and functional operation of the device at

those or any other conditions above those indicated in the

operational listings of this specification is not implied. Expo-

sure to maximum rating conditions for extended periods may

affect device reliability.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

V_DD.................................................................................13.5V

All inputs and outputs w.r.t. V_SS................ -0.3 to (V_DD+0.3)V

Current at DRV Pin ......................................................±4 mA

Current at STAT1 Pin .................................................±30 mA

Maximum Junction Temperature, T_J.............................150°C

Storage temperature .....................................-65°C to +150°C

ESD protection on all pins:

Human Body Model (1.5 kΩ in Series with 100 pF).......≥ 2 kV

Machine Model (200 pF, No Series Resistance).............200V

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 12V, T_A= -40°C to +85°C.

Typical values are at +25°C, V_DD= [V_REG(Typ) + 1V].

Parameters

Supply Input

Supply Voltage

MCP73841, MCP73843

MCP73842, MCP73844

Supply Current

Sym

Min

Typ

Max

Units

Conditions

V_DD

4.5

8.7

–

0.25

0.75

12

4

V

µA

mA

I_SS

Disabled

Operating

V

_DD=V_REG(Typ)+1V

UVLO Start Threshold

MCP73841, MCP73843

MCP73842, MCP73844

UVLO Stop Threshold

MCP73841, MCP73843

MCP73842, MCP73844

V_START

4.25

8.45

4.45

8.65

4.60

8.90

V

V_DDLow-to-High

V_STOP

4.20

8.40

4.40

8.60

4.55

8.85

V

V_DDHigh-to-Low

Voltage Regulation (Constant-Voltage Mode)

Regulated Output Voltage

V_REG

MCP73841-4.1,

MCP73843-4.1

MCP73841-4.2,

MCP73843-4.2

MCP73842-8.2,

MCP73844-8.2

MCP73842-8.4,

MCP73844-8.4

4.079

4.179

8.159

8.358

–

4.1

4.2

4.121

4.221

8.241

8.442

0.25

V

V_DD= [V_REG(Typ)+1V], I_OUT= 10 mA,

T_A= -5°C to +55°C

V_DD= [V_REG(Typ)+1V], I_OUT= 10 mA,

T_A= -5°C to +55°C

V_DD= [V_REG(Typ)+1V], I_OUT= 10 mA,

T_A= -5°C to +55°C

V_DD= [V_REG(Typ)+1V], I_OUT= 10 mA,

T_A= -5°C to +55°C

8.2

V

8.4

V

Line Regulation

|(∆V_BAT

/

0.025

0.01

%/V

%

V_DD= [V_REG(Typ)+1V] to 12V,

I_OUT= 10 mA

V

_BAT)|/∆V_DD

Load Regulation

|∆V_BAT|/V_BAT

–

0.25

I_OUT= 10 mA to 150 mA,

_DD= [V_REG(Typ)+1V]

V

Supply Ripple Attenuation

PSRR

–

-58

-42

-30

0.4

–

1

dB

µA

I_OUT= 10 mA, 100 Hz

I_OUT= 10 mA, 1 kHz

I_OUT= 10 mA, 10 kHz

Output Reverse Leakage

Current

I_DISCHARGE

V_DDFloating, V_BAT= V_REG(Typ)

Current Regulation (Fast Charge Constant-Current Mode)

Fast Charge Current

Regulation Threshold

V_FCS

100

110

120

mV

V_DD– V_SENSE,

T_A= -5°C to +55°C

2004 Microchip Technology Inc.

DS21823B-page 3

MCP73841/2/3/4

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 12V, T_A= -40°C to +85°C.

Typical values are at +25°C, V_DD= [V_REG(Typ) + 1V].

Parameters

Sym

Min

Typ

Max

Units

Conditions

Preconditioning Current Regulation (Trickle Charge Constant-Current Mode)

Precondition Current

Regulation Threshold

Precondition Threshold Voltage

V_PCS

V_PTH

5

10

15

mV

V_DD– V_SENSE,

T_A= -5°C to +55°C

MCP73841-4.1,

MCP73843-4.1

MCP73841-4.2,

MCP73843-4.2

MCP73842-8.2,

MCP73844-8.2

MCP73842-8.4,

MCP73844-8.4

2.70

2.75

5.40

5.50

2.80

2.85

5.60

5.70

2.90

2.95

5.80

5.90

V

V_BATLow-to-High

Charge Termination

Charge Termination Threshold

V_TCS

4

7

10

mV

V_DD– V_SENSE,

T_A= -5°C to +55°C

Automatic Recharge

Recharge Threshold Voltage

V_RTH

MCP73841,

MCP73843

MCP73842,

MCP73844

V_REG

-

V_REG

-

V_REG

-

V

V_BATHigh-to-Low

300 mV 200 mV 100 mV

V_REG

-

V_REG

-

V_REG-

600 mV 400 mV 200 mV

External MOSFET Gate Drive

Gate Drive Current

I_DRV

–

2

-0.5

–

1.0

-4.5

mA

V

Sink, CV Mode

Source, CV Mode

V_DD= 4.5V

Gate Drive Minimum Voltage

Gate - Source Clamp Voltage

V_DRVMIN

V_GS

-7.0

–

V

V_DD= 12.0V

Thermistor Reference - MCP73841, MCP73842

Thermistor Reference Output

Voltage

V_THREF

2.475

2.55

2.625

V

T_A= +25°C, V_DD= V_REG(Typ)+1V,

I

_THREF= 0 mA

Temperature Coefficient

Thermistor Reference Source

Current

TC_THREF

I_THREF

–

200

+50

–

ppm/°C

µA

Thermistor Reference Line

Regulation

|(∆V_THREF

/

–

0.1

0.25

0.10

%/V

%

V_DD=[V_REG(Typ)+1V] to 12V

I_THREF= 0 mA to 0.20 mA

V

_THREF)|/

∆V_DD

Thermistor Reference Load

Regulation

∆V_THREF

V_THREF

/

0.01

Thermistor Comparator - MCP73841, MCP73842

Upper Trip Threshold

Upper Trip Point Hysteresis

Lower Trip Threshold

Lower Trip Point Hysteresis

Input Bias Current

V_T1

V_T1HYS

V_T2

1.18

–

0.59

–

1.25

-50

0.62

80

1.32

–

0.66

–

V

mV

V

mV

µA

V_T2HYS

|I_BIAS

|

–

2

Status Indicator

Sink Current

Low Output Voltage

Input Leakage Current

I_SINK

V_OL

I_LK

4

–

7

200

0.01

12

400

1

mA

mV

µA

I_SINK= 1 mA

I_SINK= 0 mA, V_STAT1= 12V

DS21823B-page 4

2004 Microchip Technology Inc.

MCP73841/2/3/4

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 12V, T_A= -40°C to +85°C.

Typical values are at +25°C, V_DD= [V_REG(Typ) + 1V].

Parameters

Enable Input

Sym

Min

Typ

Max

Units

Conditions

Input High-Voltage Level

Input Low-Voltage Level

Input Leakage Current

V_IH

V_IL

I_LK

1.4

–

-

–

0.8

1

V

µA

0.01

V_ENABLE= 12V

AC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 12V, T_A= -40°C to +85°C. Typ-

ical values are at +25°C, V_DD= [V_REG(Typ)+1V].

Parameters

UVLO Start Delay

Sym

Min

Typ

Max

Units

Conditions

V_DDLow-to-High

t_START

–

5

msec

Current Regulation

Transition Time Out of

t_DELAY

t_RISE

–

1

msec

V_BAT< V_PTHto V_BAT> V_PTH

I_OUTRising to 90% of I_REG

Preconditioning

Current Rise Time Out of

Preconditioning

Fast Charge Safety Timer Period

Preconditioning Current Regulation

Preconditioning Charge Safety

Timer Period

t_FAST

1.2

1.4

1.6

Hours C_TIMER= 0.1 µF

Minutes C_TIMER= 0.1 µF

t_PRECON

50

60

70

Charge Termination

Elapsed Time Termination Period

Status Indicators

t_TERM

2.5

2.9

3.3

Hours C_TIMER= 0.1 µF

Status Output turn-off

Status Output turn-on

t_OFF

t_ON

–

200

µsec

I_SINK= 10 mA to 0 mA

I_SINK= 0 mA to 10 mA

TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise specified, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 12V.

Typical values are at +25°C, V_DD= [V_REG(Typ)+1.0V].

Parameters

Temperature Ranges

Sym

Min

Typ

Max

Units

Conditions

Specified Temperature Range

Operating Temperature Range

Storage Temperature Range

Thermal Package Resistances

Thermal Resistance, MSOP-10

T_A

-40

-65

+85

+125

+150

°C

θ_JA

113

206

°C/W

4-Layer JC51-7 Standard Board,

Natural Convection

Single-Layer SEMI G42-88 Board,

Natural Convection

Thermal Resistance, MSOP-8

2004 Microchip Technology Inc.

DS21823B-page 5

MCP73841/2/3/4

2.0

TYPICAL PERFORMANCE CURVES

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provided for informational purposes only. The performance characteristics listed herein

are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified

operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

Note: Unless otherwise indicated, V = [V

(Typ) + 1V], I

= 10 mA and T = +25°C.

DD

REG

OUT

A

4.203

1.40

MCP73841-4.2V

V_DD= 5.2 V

MCP73841-4.2V

V_DD= 5.2 V

4.202

4.201

4.200

4.199

4.198

4.197

4.196

1.20

1.00

0.80

0.60

0.40

0.20

0.00

+55°C

+25°C

+85°C

+25°C

-45°C

-5°C

10

100

I_OUT(mA)

1000

10

100

I_OUT(mA)

1000

FIGURE 2-1:

Battery Regulation Voltage

FIGURE 2-4:

Supply Current (I ) vs.

SS

(V

) vs. Charge Current (I

).

Charge Current (I

OUT

).

BAT

OUT

4.203

1.40

+85°C

MCP73841-4.2V

I_OUT= 1000 mA

MCP73841-4.2V

_OUT= 1000 mA

4.202

4.201

4.200

4.199

4.198

4.197

4.196

1.20

1.00

0.80

0.60

0.40

0.20

0.00

I

+55°C

+25°C

-45°C

-5°C

4.5

6.0

7.5

9.0

10.5

12.0

4.5

6.0

7.5

9.0

10.5

12.0

V_DD(V)

FIGURE 2-2:

Battery Regulation Voltage

FIGURE 2-5:

Supply Current (I ) vs.

SS

DD

(V

) vs. Supply Voltage (V ).

Supply Voltage (V ).

BAT

DD

4.203

1.40

1.20

1.00

0.80

0.60

0.40

0.20

0.00

MCP73841-4.2V

I_OUT= 10 mA

MCP73841-4.2V

4.202

4.201

4.200

4.199

4.198

4.197

4.196

I_OUT= 10 mA

+55°C

+25°C

-45°C

+25°C

+85°C

-5°C

4.5

6.0

7.5

9.0

10.5

12.0

4.5

6.0

7.5

9.0

10.5

12.0

V_DD(V)

FIGURE 2-3:

Battery Regulation Voltage

FIGURE 2-6:

Supply Current (I ) vs.

SS

DD

(V ) vs. Supply Voltage (V ).

Supply Voltage (V ).

BAT

DD

DS21823B-page 6

2004 Microchip Technology Inc.

MCP73841/2/3/4

Note: Unless otherwise indicated, V = [V

(Typ) + 1V], I

= 10 mA and T = +25°C.

DD

REG

OUT A

8.408

1.40

1.20

1.00

0.80

0.60

0.40

0.20

0.00

MCP73842-8.4V

V_DD= 9.4 V

MCP73842-8.4V

V_DD= 9.4 V

8.406

8.404

8.402

8.400

8.398

8.396

8.394

8.392

8.390

+85°C

+25°C

+55°C

+25°C

-45°C

-5°C

10

100

1000

10

100

1000

I_OUT(mA)

FIGURE 2-7:

Battery Regulation Voltage

FIGURE 2-10:

Supply Current (I ) vs.

SS

OUT

(V

) vs. Charge Current (I

).

Charge Current (I

).

BAT

OUT

8.408

1.40

1.20

MCP73842-8.4V

I_OUT= 1000 mA

MCP73842-8.4V

_OUT= 1000 mA

8.406

8.404

8.402

8.400

8.398

8.396

8.394

8.392

8.390

I

+85°C

+25°C

+55°C

+25°C

1.00

0.80

0.60

0.40

0.20

0.00

-45°C

-5°C

8.8 9.2 9.6 10 10.4 10.8 11.2 11.6 12

V_DD(V)

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

V_DD(V)

FIGURE 2-8:

Battery Regulation Voltage

FIGURE 2-11:

Supply Current (I ) vs.

SS

DD

(V ) vs. Supply Voltage (V ).

Supply Voltage (V ).

BAT

DD

8.408

8.406

8.404

8.402

8.400

8.398

8.396

8.394

8.392

8.390

1.40

1.20

1.00

0.80

0.60

0.40

0.20

0.00

MCP73842-8.4V

I_OUT= 10 mA

MCP73842-8.4V

I_OUT= 10 mA

+55°C

+25°C

-5°C

-45°C

+25°C

+85°C

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

V_DD(V)

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

V_DD(V)

FIGURE 2-9:

Battery Regulation Voltage

FIGURE 2-12:

Supply Current (I ) vs.

SS

DD

(V ) vs. Supply Voltage (V ).

Supply Voltage (V ).

BAT

DD

2004 Microchip Technology Inc.

DS21823B-page 7

MCP73841/2/3/4

Note: Unless otherwise indicated, V = [V

(Typ) + 1V], I

= 10 mA and T = +25°C.

DD

REG

OUT

A

0.45

0.40

0.90

MCP73842-8.4V

V_DD= Float

MCP73841-4.2V

0.80

0.70

0.60

0.50

0.40

0.30

0.20

0.10

0.00

V_DD= Float

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

+85°C

+25°C

+85°C

+25°C

-45°C

2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2

_BAT(V)

4.0 4.4 4.8 5.2 5.6 6.0 6.4 6.8 7.2 7.6 8.0 8.4

_BAT(V)

V

FIGURE 2-13:

Output Reverse Leakage

FIGURE 2-16:

Output Reverse Leakage

Current (I

) vs. Battery Voltage (V

).

Current (I

) vs. Battery Voltage (V

).

BAT

DISCHARGE

BAT

DISCHARGE

2.560

2.558

2.556

2.554

2.552

2.550

2.548

2.546

2.544

2.542

2.540

2.560

2.558

2.556

2.554

2.552

2.550

2.548

2.546

2.544

2.542

2.540

MCP73841-4.2V

MCP73842-8.4V

V_DD= 9.4 V

V

_DD= 5.2 V

+85°C

+25°C

+85°C

+25°C

-45°C

0

25

50

75 100 125 150 175 200

I_THREF(µA)

0

25

50

75 100 125 150 175 200

I_THREF(µA)

FIGURE 2-14:

Voltage (V

THREF

Thermistor Reference

FIGURE 2-17:

Voltage (V

Thermistor Reference

) vs. Thermistor Bias Current

THREF

(I

).

(I

).

THREF

2.568

2.564

2.560

2.556

2.552

2.548

2.544

2.540

2.568

2.564

2.560

2.556

2.552

2.548

2.544

2.540

MCP73841-4.2V

I_THREF= 100 µA

MCP73842-8.4V

I_THREF= 100 µA

+85°C

+25°C

+85°C

+25°C

-45°C

4.5

6.0

7.5

9.0

10.5

12.0

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

V_DD(V)

FIGURE 2-15:

Voltage (V

Thermistor Reference

) vs. Supply Voltage (V ).

FIGURE 2-18:

Voltage (V

Thermistor Reference

) vs. Supply Voltage (V ).

THREF

DD

THREF

DD

DS21823B-page 8

2004 Microchip Technology Inc.

MCP73841/2/3/4

Note: Unless otherwise indicated, V = [V

(Typ) + 1V], I

= 10 mA and T = +25°C.

DD

REG

OUT

A

V

DD

V

DD

V

BAT

MCP73841-4.2V

V

Stepped From 5.2V to 6.2V

= 500 mA

= 10 µF, X7R, Ceramic

DD

V

Stepped From 5.2V to 6.2V

= 10 mA

= 10 µF, X7R, Ceramic

DD

I

OUT

I

OUT

C

OUT

C

OUT

FIGURE 2-19:

Line Transient Response.

FIGURE 2-22:

Line Transient Response.

MCP73841-4.2V

= 5.2V

MCP73841-4.2V

= 5.2V

V

DD

V

DD

C

= 10 µF, X7R, Ceramic

OUT

C

= 10 µF, X7R, Ceramic

OUT

V

BAT

V

BAT

I

OUT

I

OUT

100 mA

10 mA

500 mA

10 mA

FIGURE 2-20:

Load Transient Response.

FIGURE 2-23:

Load Transient Response.

0

-10

-20

-30

-40

-50

-60

-70

0

-10

-20

-30

-40

-50

-60

-70

MCP73841-4.2V

V

_DD= 5.2 V

V

_DD= 5.2 V

V_AC= 100 mVp-p

_OUT= 100 mA

C_OUT= 10 µF, X7R, CERAMIC

V_AC= 100 mVp-p

_OUT= 10 mA

C_OUT= 10 µF, X7R, CERAMIC

I

-80

0.01

-80

0.01

0.1

1

10

100

1000

0.1

1

10

100

1000

Frequency (kHz)

FIGURE 2-21:

Power Supply Ripple

FIGURE 2-24:

Power Supply Ripple

Rejection.

2004 Microchip Technology Inc.

DS21823B-page 9

MCP73841/2/3/4

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN DESCRIPTION TABLE

MCP73843,

MCP73841,

MCP73842

Pin No.

MCP73844

Pin No.

Name

Function

Charge Current Sense Input

Battery Management Input Supply

Charge Status Output

Logic Enable

1

2

3

1

2

3

SENSE

V

DD

STAT1

EN

4

5

6

7

—

5

THREF

THERM

TIMER

Cell Temperature Sensor Bias

Cell Temperature Sensor Input

Timer Set

8

9

10

6

7

8

V

Battery Management 0V Reference

Battery Voltage Sense

Drive Output

SS

V

BAT

DRV

3.1

Charge Current Sense Input

(SENSE)

3.6

Cell Temperature Sensor Input

(THERM)

Charge current is sensed via the voltage developed

across an external precision sense resistor. The sense

resistor must be placed between the supply voltage

Input for an external thermistor for continuous cell-

temperature monitoring and pre-qualification. Apply a

voltage equal to 0.85V to disable temperature-sensing.

(V ) and the external pass transistor (Q1). A 220 mΩ

DD

sense resistor produces a fast charge current of

500 mA, typically.

3.7

Timer Set (TIMER)

All safety timers are scaled by C

/0.1 µF.

TIMER

3.2

Battery Management Input Supply

(V

3.8

Battery Management 0V Reference

(V

)

DD

)

SS

Connect to negative terminal of battery.

A supply voltage of [V

recommended. Bypass to V

4.7 µF.

(Typ) + 0.3V] to 12V is

SS

REG

with a minimum of

3.9

Battery Voltage Sense (V

)

BAT

Voltage sense input. Connect to positive terminal of

3.3

Charge Status Output (STAT1)

battery. Bypass to V

with a minimum of 4.7 µF to

Current limited, open-drain drive for direct connection

to a LED for charge status indication. Alternatively, a

pull-up resistor can be applied for interfacing to a host

microcontroller.

SS

ensure loop stability when the battery is disconnected.

A precision internal resistor divider regulates the final

voltage on this pin to V

.

REG

3.10 Drive Output (DRV)

Direct output drive of an external P-channel MOSFET

for current and voltage regulation.

3.4

Logic Enable (EN)

Input to force charge termination, initiate charge, clear

faults or disable automatic recharge.

3.5

Cell Temperature Sensor Bias

(THREF)

Voltage reference to bias external thermistor for

continuous

cell

temperature

monitoring

and

prequalification.

DS21823B-page 10

2004 Microchip Technology Inc.

MCP73841/2/3/4

4.3

Constant-Voltage Regulation

4.0

DEVICE OVERVIEW

When the battery voltage reaches the regulation

The MCP7384X family of devices are highly advanced,

linear charge management controllers. Figure 4-1

depicts the operational flow algorithm from charge

initiation to completion and automatic recharge.

voltage (V ), constant-voltage regulation begins.

REG

The MCP7384X monitors the battery voltage at the

V

pin. This input is tied directly to the positive

BAT

terminal of the battery. The MCP7384X is offered in

four fixed-voltage versions for single or dual series cell

battery packs with either coke or graphite anodes:

4.1

Charge Qualification and

Preconditioning

- 4.1V (MCP73841-4.1, MCP73843-4.1)

- 4.2V (MCP73841-4.2, MCP73843-4.2)

- 8.2V (MCP73842-8.2, MCP73844-8.2)

- 8.4V (MCP73842-8.4, MCP73844-8.4)

Upon insertion of a battery or application of an external

supply, the MCP7384X family of devices automatically

perform a series of safety checks to qualify the charge.

The input source voltage must be above the

undervoltage lockout threshold, the enable pin must be

above the logic-high level and the cell temperature

monitor must be within the upper and lower thresholds.

The cell temperature monitor applies to both the

MCP73841 and MCP73842, with the qualification

parameters being continuously monitored. Deviation

beyond the limits automatically suspends or terminates

the charge cycle.

4.4

Charge Cycle Completion and

Automatic Re-Charge

The MCP7384X monitors the charging current during

the constant-voltage regulation phase. The charge

cycle is considered complete when the charge current

has diminished below approximately 7% of the

regulation current (I

expired.

) or the elapsed timer has

REG

Once the qualification parameters have been met, the

MCP7384X initiates a charge cycle. The charge status

output is pulled low throughout the charge cycle (see

Table 5-1 for charge status outputs). If the battery

The MCP7384X automatically begins a new charge

cycle when the battery voltage falls below the recharge

threshold (V

), assuming all the qualification

voltage is below the preconditioning threshold (V

),

RTH

PTH

parameters are met.

the MCP7384X preconditions the battery with a trickle-

charge. The preconditioning current is set to

approximately 10% of the fast charge regulation

current. The preconditioning trickle-charge safely

replenishes deeply depleted cells and minimizes heat

dissipation in the external pass transistor during the

initial charge cycle. If the battery voltage has not

exceeded the preconditioning threshold before the

preconditioning timer has expired, a fault is indicated

and the charge cycle is terminated.

4.2

Constant-Current Regulation –

Fast Charge

Preconditioning ends and fast charging begins, when

the battery voltage exceeds the preconditioning

threshold. Fast charge regulates to a constant-current,

I

, based on the supply voltage minus the voltage at

REG

the SENSE input (V

) developed by the drop across

FCS

an external sense resistor (R

). Fast charge

SENSE

continues until the battery voltage reaches the

regulation voltage (V

); or until the fast charge timer

REG

expires. In this case, a fault is indicated and the charge

cycle is terminated.

2004 Microchip Technology Inc.

DS21823B-page 11

MCP73841/2/3/4

For NTC thermistors:

5.0

DETAILED DESCRIPTION

Analog Circuitry

2 × R_COLD× R_HOT

5.1

----------------------------------------------

R_T1

R_T2

=

R

_COLD– R_HOT

5.1.1

CHARGE CURRENT SENSE INPUT

(SENSE)

2 × R_COLD× R_HOT

----------------------------------------------

R

_COLD– 3 × R_HOT

Fast charge current regulation is maintained by the

voltage drop developed across an external sense

resistor (R

) applied to the SENSE input pin. The

SENSE

For PTC thermistors:

following formula calculates the value for R

:

SENSE

2 × R_COLD× R_HOT

----------------------------------------------

R_T1

R_T2

=

V_FCS

I_REG

R

_HOT– R_COLD

------------

=

R_SENSE

2 × R_COLD× R_HOT

where:

is the desired fast charge current in amps

----------------------------------------------

R

_HOT– 3 × R_COLD

I

REG

The preconditioning trickle-charge current and the

charge termination current are scaled to approximately

where:

R

and R

are the thermistor resistance

HOT

COLD

10% and 7% of I

, respectively.

values at the temperature window of interest.

REG

Applying a voltage equal to 0.85V to the THERM input

disables temperature monitoring.

5.1.2

BATTERY MANAGEMENT INPUT

SUPPLY (V

)

DD

input is the input supply to the MCP7384X.

The V

DD

5.1.5

TIMER SET INPUT (TIMER)

The MCP7384X automatically enters a power-down

The TIMER input programs the period of the safety

mode if the voltage on the V

input falls below the

STOP

DD

timers by placing a timing capacitor (C

) between

TIMER

undervoltage lockout voltage (V

). This feature

the TIMER input pin and V . Three safety timers are

SS

prevents draining the battery pack when the V

supply is not present.

DD

programmed via the timing capacitor.

The preconditioning safety timer period:

5.1.3

CELL TEMPERATURE SENSOR

BIAS (THREF)

C_TIMER

t_PRECON= ------------------ × 1.0Hours

0.1µF

A 2.55V voltage reference is provided to bias an

external thermistor for continuous cell temperature

monitoring and pre-qualification. A ratio metric window

comparison is performed at threshold levels of

The fast charge safety timer period:

C_TIMER

t_FAST= ------------------ × 1.5Hours

0.1µF

V

/2 and V

/4. Cell temperature monitoring

THREF

is provided by both the MCP73841 and MCP73842.

5.1.4

CELL TEMPERATURE SENSOR

INPUT (THERM)

The elapsed time termination period:

C_TIMER

t_TERM= ------------------ × 3.0Hours

0.1µF

The MCP73841 and MCP73842 continuously monitor

temperature by comparing the voltage between the

THERM input and V

with the upper and lower

SS

The preconditioning timer starts after qualification and

resets when the charge cycle transitions to the con-

stant-current, fast charge phase. The fast charge and

elapsed timers start once the MCP7384X transitions

from preconditioning. The fast charge timer resets

when the charge cycle transitions to the constant-volt-

age phase. The elapsed timer will expire and terminate

the charge if the sensed current does not diminish

below the termination threshold.

temperature thresholds.

A

negative or positive

temperature coefficient (NTC or PTC) thermistor and

an external voltage divider typically develop this

voltage. The temperature-sensing circuit has its own

reference, to which it performs

a ratio metric

comparison. Therefore, it is immune to fluctuations in

the supply input (V ). The temperature-sensing circuit

DD

is removed from the system when V

is not applied,

DD

eliminating additional discharge of the battery pack.

Figure 6-1 depicts a typical application circuit with

connection of the THERM input. The resistor values of

R

and

R

are calculated with the following

T2

T1

equations.

2004 Microchip Technology Inc.

DS21823B-page 13

MCP73841/2/3/4

5.1.6

BATTERY VOLTAGE SENSE (V

)

BAT

5.2

Digital Circuitry

The MCP7384X monitors the battery voltage at the

5.2.1

CHARGE STATUS OUTPUT (STAT1)

V

pin. This input is tied directly to the positive

BAT

terminal of the battery. The MCP7384X is offered in

four fixed-voltage versions for single or dual series cell

battery packs, with either coke or graphite anodes:

A status output provides information on the state-of-

charge. The current-limited, open-drain output can be

used to illuminate an external LED. Optionally, a pull-up

resistor can be used on the output for communication

with a host microcontroller. Table 5-1 summarizes the

state of the status output during a charge cycle.

- 4.1V (MCP73841-4.1, MCP73843-4.1)

- 4.2V (MCP73841-4.2, MCP73843-4.2)

- 8.2V (MCP73842-8.2, MCP73844-8.2)

- 8.4V (MCP73842-8.4, MCP73844-8.4)

TABLE 5-1:

STATUS OUTPUTS

Charge Cycle State

Stat1

5.1.7

DRIVE OUTPUT (DRV)

Qualification

Preconditioning

Constant-Current Fast

Charge

Constant-Voltage

Charge Complete

Safety Timer Fault

OFF

ON

The MCP7384X controls the gate drive to an external

P-channel MOSFET. The P-channel MOSFET is

controlled in the linear region regulating current and

voltage supplied to the cell. The drive output is

automatically turned off when the voltage on the V

DD

ON

OFF

input falls below the undervoltage lockout voltage

(V ).

STOP

Flashing

(1 Hz, 50% duty cycle)

Cell Temperature Invalid

Flashing

(1 Hz, 50% duty cycle)

Disabled - Sleep mode

Battery Disconnected

OFF

The flashing rate (1 Hz) is based off a timer capacitor

(C ) of 0.1 µF. The rate will vary based on the

TIMER

value of the timer capacitor.

5.2.2

LOGIC ENABLE (EN)

The logic-enable input pin (EN) can be used to

terminate a charge anytime during the charge cycle,

initiate a charge cycle or initiate a recharge cycle.

Applying a logic-high input signal to the EN pin, or tying

it to the input source, enables the device. Applying a

logic-low input signal disables the device and

terminates a charge cycle. When disabled, the device’s

supply current is reduced to 0.25 µA, typically.

DS21823B-page 14

2004 Microchip Technology Inc.

MCP73841/2/3/4

cells: constant-current followed by constant-voltage.

Figure 6-1 depicts a typical stand-alone application

circuit, while Figure 6-2 depicts the accompanying

charge profile.

6.0

APPLICATIONS

The MCP7384X is designed to operate in conjunction

with either a host microcontroller or in stand-alone

applications. The MCP7384X provides the preferred

charge algorithm for Lithium-Ion and Lithium-Polymer

Voltage

Regulated

Wall Cube

Optional

Reverse

Blocking

Diode

Q

1

R

SENSE

+

-

DRV

10

SENSE

1

V

DD

BAT

9

8

7

6

2

3

4

5

STAT1

EN

SS

MCP73841

C

TIMER

R

T1

THREF

THERM

R

T2

Battery

Pack

FIGURE 6-1:

Typical Application Circuit.

Preconditioning

Phase

Constant-Current

Phase

Constant-Voltage

Phase

Regulation Voltage

(V

)

REG

Regulation Current

(I

)

REG

Charge

Voltage

Transition Threshold

(V

)

PTH

Charge

Current

Precondition Current

(I

)

PREG

Termination Current

(I

)

TERM

Fast Charge

Safety Timer

Precondition

Safety Timer

Elapsed Time

Termination Timer

FIGURE 6-2:

Typical Charge Profile.

2004 Microchip Technology Inc.

DS21823B-page 15

MCP73841/2/3/4

6.1.1.2

External Pass Transistor

6.1

Application Circuit Design

The external P-channel MOSFET is determined by the

gate-to-source threshold voltage, input voltage, output

voltage and fast charge current. Therefore, the

selected P-channel MOSFET must satisfy the thermal

and electrical design requirements.

Due to the low efficiency of linear charging, the most

important factors are thermal design and cost, which are

a direct function of the input voltage, output current and

thermal impedance between the external P-channel

pass transistor and the ambient cooling air. The worst-

case situation occurs when the device has transitioned

from the preconditioning phase to the constant-current

phase. In this situation, the P-channel pass transistor

has to dissipate the maximum power. A trade-off must

be made between the charge current, cost and thermal

requirements of the charger.

Thermal Considerations

The worst-case power dissipation in the external pass

transistor occurs when the input voltage is at the

maximum and the device has transitioned from the

preconditioning phase to the constant-current phase.

In this case, the power dissipation is:

6.1.1

COMPONENT SELECTION

PowerDissipation = (V

– V

) × I

Selection of the external components in Figure 6-1 are

crucial to the integrity and reliability of the charging

system. The following discussion is intended to be a

guide for the component selection process.

DDMAX

PTHMIN

REGMAX

Where:

V

is the maximum input voltage.

DDMAX

REGMAX

I

is the maximum fast charge current.

6.1.1.1

Sense Resistor

V

is the minimum transition threshold voltage.

PTHMIN

The preferred fast charge current for Lithium-Ion cells

is at the 1C rate, with an absolute maximum current at

the 2C rate. For example, a 500 mAh battery pack has

a preferred fast charge current of 500 mA. Charging at

this rate provides the shortest charge cycle times

without degradation to the battery pack performance or

life.

Power dissipation with a 5V, ±10% input voltage

source, 220 mΩ, 1% sense resistor is:

PowerDissipation = (5.5V – 2.75V) × 551mA = 1.52W

Utilizing a Fairchild™ NDS8434 or an International

2

The current sense resistor (R

) is calculated by:

Rectifier IRF7404 mounted on a 1in pad of 2 oz.

SENSE

copper, the junction temperature rise is 75°C,

approximately. This would allow for a maximum

operating ambient temperature of 75°C.

V_FCS

------------

I_REG

R_SENSE

=

Where:

is the desired fast charge current.

By increasing the size of the copper pad, a higher

ambient temperature can be realized, or a lower value

sense resistor could be utilized.

I

REG

Alternatively, different package options can be utilized

for more or less power dissipation. Again, design trade-

offs should be considered to minimize size while

maintaining the desired performance.

For the 500 mAh battery pack example, a standard

value 220 mΩ, 1% resistor provides a typical fast

charge current of 500 mA and a maximum fast charge

current of 551 mA. Worst-case power dissipation in the

sense resistor is:

Electrical Considerations

PowerDissipation = 220mΩ × 551mA²= 66.8mW

The gate-to-source threshold voltage and R

of the

DSON

external P-channel MOSFET must be considered in the

design phase.

®

A Panasonic ERJ-6RQFR22V, 220 mW, 1%, 1/8W

The worst-case V provided by the controller occurs

resistor in a standard 0805 package is more than

sufficient for this application.

GS

when the input voltage is at the minimum and the fast

charge current regulation threshold is at the maximum.

A larger value sense resistor will decrease the fast

charge current and power dissipation in both the sense

resistor and external pass transistor, but will increase

charge cycle times. Design trade-offs must be

considered to minimize space while maintaining the

desired performance.

The worst-case V is:

GS

V_GS= V_DRVMAX– (V_DDMIN– V_FCSMAX

)

Where:

DRVMAX

V

is the maximum sink voltage at the

DRV

is the minimum input voltage source

is the maximum fast charge current

regulation threshold

V

output

V

DDMIN

FCSMAX

DS21823B-page 16

2004 Microchip Technology Inc.

MCP73841/2/3/4

Worst-case V with a 5V, ±10% input voltage source

6.1.1.5

ENABLE INTERFACE

GS

and a maximum sink voltage of 1.0V is:

In the stand-alone configuration, the enable pin is

generally tied to the input voltage. The MCP7384X

automatically enters a Low-power mode when voltage

V_GS= 1.0V – (4.5V – 120mV) = –3.38V

on the V

input falls below the undervoltage lockout

), reducing the battery drain current to

DD

STOP

At this worst-case (V ) the R

of the MOSFET

voltage (V

GS

DSON

must be low enough as to not impede the performance

of the charging system. The maximum allowable

0.4 µA, typically.

6.1.1.6

CHARGE STATUS INTERFACE

R

at the worst-case V is:

GS

DSON

A status output provides information on the state of

charge. The current-limited, open-drain output can be

used to illuminate an external LED. Refer to Table 5-1

for a summary of the state of the status output during a

charge cycle.

V

– V_FCSMAX– V_BATMAX

I_REGMAX

-----^D---^D----^M----^I--^N-------------------------------------------------------------

R_DSON

=

4.5V – 120(115)mV – 4.221V

------------------------------------------------------------------------

= 288mΩ

R_DSON

=

551(581)mA

6.2

PCB Layout Issues

The Fairchild NDS8434 and International Rectifier

IRF7404 both satisfy these requirements.

For optimum voltage regulation, place the battery pack

as close as possible to the device’s V

and V pins.

SS

BAT

6.1.1.3

EXTERNAL CAPACITORS

This is recommended to minimize voltage drops along

the high current-carrying PCB traces.

The MCP7384X are stable with or without a battery

load. In order to maintain good AC stability in the

Constant-Voltage mode, a minimum capacitance of

If the PCB layout is used as a heatsink, adding many

vias around the external pass transistor can help

conduct more heat to the back plane of the PCB, thus

reducing the maximum junction temperature.

4.7 µF is recommended to bypass the V

pin to V

.

SS

BAT

This capacitance provides compensation when there is

no battery load. Additionally, the battery and

interconnections appear inductive at high frequencies.

These elements are in the control feedback loop during

Constant-Voltage mode. Therefore, the bypass

capacitance may be necessary to compensate for the

inductive nature of the battery pack.

Virtually any good quality output filter capacitor can be

used, independent of the capacitor’s minimum ESR

(Effective Series Resistance) value. The actual value of

the capacitor and its associated ESR depends on the

forward transconductance (g ) and capacitance of the

m

external pass transistor.

A 4.7 µF tantalum or

aluminum electrolytic capacitor at the output is usually

sufficient to ensure stability for up to a 1A output

current.

6.1.1.4

REVERSE-BLOCKING PROTECTION

The optional reverse-blocking protection diode,

depicted in Figure 6-1, provides protection from a

faulted or shorted input, or from a reversed-polarity

input source. Without the protection diode, a faulted or

shorted input would discharge the battery pack through

the body diode of the external pass transistor.

If a reverse-protection diode is incorporated into the

design, it should be chosen to handle the fast charge

current continuously at the maximum ambient

temperature. In addition, the reverse-leakage current

of the diode should be kept as small as possible.

2004 Microchip Technology Inc.

DS21823B-page 17

MCP73841/2/3/4

7.0

PACKAGING INFORMATION

7.1

Package Marking Information

Example:

8-Lead MSOP (MCP73843, MCP73844)

738431

0319256

XXXXX

YWWNNN

Example:

10-Lead MSOP (MCP73841, MCP73842)

738411

XXXXX

0319256

YYWWNNN

Legend: XX...X Customer specific information*

YY

Year code (last 2 digits of calendar year)

Week code (week of January 1 is week ‘01’)

Alphanumeric traceability code

WW

NNN

Note: In the event the full Microchip part number cannot be marked on one line, it will

be carried over to the next line thus limiting the number of available characters

for customer specific information.

*

Standard marking consists of Microchip part number, year code, week code, and traceability code.

DS21823B-page 18

2004 Microchip Technology Inc.

MCP73841/2/3/4

8-Lead Plastic Micro Small Outline Package (MS) (MSOP)

E

E1

p

D

2

B

n

1

α

A2

A

c

φ

A1

(F)

L

β

Units

Dimension Limits

INCHES

NOM

MILLIMETERS*

MIN

MAX

MIN

NOM

MAX

n

p

Number of Pins

Pitch

8

.026 BSC

0.65 BSC

Overall Height

A

A2

A1

E

-

.043

-

1.10

Molded Package Thickness

Standoff

.030

.000

.033

-

.037

.006

0.75

0.00

0.85

-

0.95

0.15

Overall Width

.193 TYP.

4.90 BSC

Molded Package Width

Overall Length

Foot Length

E1

D

.118 BSC

3.00 BSC

L

.016

.024

.037 REF

.031

0.40

0.60

0.95 REF

0.80

Footprint (Reference)

Foot Angle

F

φ

c

0°

.003

.009

5°

-

8°

.009

.016

15°

0°

0.08

0.22

5°

-

8°

0.23

0.40

15°

Lead Thickness

Lead Width

.006

B

α

β

.012

Mold Draft Angle Top

Mold Draft Angle Bottom

*Controlling Parameter

Notes:

-

5°

15°

5°

15°

Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not

exceed .010" (0.254mm) per side.

JEDEC Equivalent: MO-187

Drawing No. C04-111

2004 Microchip Technology Inc.

DS21823B-page 19

MCP73841/2/3/4

10-Lead Plastic Micro Small Outline Package (UN) (MSOP)

E

E1

p

D

2

1

B

n

α

A

φ

c

A2

A1

L

(F)

β

L1

Units

Dimension Limits

INCHES

NOM

MILLIMETERS*

NOM

MIN

MAX

MIN

MAX

n

p

Number of Pins

Pitch

10

.020 TYP

10

0.50 TYP.

Overall Height

Molded Package Thickness

Standoff

A

A2

A1

E

-

.043

-

0.85

-

1.10

0.95

0.15

.030

.000

.033

-

.037

.006

0.75

0.00

Overall Width

.193 BSC

4.90 BSC

Molded Package Width

Overall Length

Foot Length

E1

D

.118 BSC

3.00 BSC

L

.016

.024

.037 REF

.031

0.40

0.60

0.95 REF

0.80

Footprint

F

φ

Foot Angle

0°

.003

.006

5°

-

8°

.009

.012

15°

0°

0.08

0.15

5°

-

8°

0.23

0.30

15°

c

Lead Thickness

Lead Width

B

α

β

.009

0.23

Mold Draft Angle Top

Mold Draft Angle Bottom

*Controlling Parameter

Notes:

-

5°

15°

5°

15°

Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not

exceed .010" (0.254mm) per side.

JEDEC Equivalent: MO-187

Drawing No. C04-021

DS21823B-page 20

2004 Microchip Technology Inc.

MCP73841/2/3/4

PRODUCT IDENTIFICATION SYSTEM

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Examples:

PART NO.

XXX

X

XX

a)

MCP73841-410I/UN: 4.1V Preset Voltage

Device

Preset Temperature Package

b)

MCP73841T-410I/UN: 4.1V Preset Voltage,

Tape and Reel

Voltage

Options

Range

c)

d)

MCP73841-420I/UN: 4.2V Preset Voltage

MCP73841T-420I/UN: 4.2V Preset Voltage,

Tape and Reel

Device

MCP73841:

Single-cell charge controller with temperature

monitor

a)

b)

MCP73842-820I/UN: 8.2V Preset Voltage

MCP73842T-820I/UN: 8.2V Preset Voltage,

Tape and Reel

MCP73841T: Single-cell charge controller with temperature

monitor, Tape and Reel

MCP73842:

Dual series cells charge controller with tem-

perature monitor

c)

d)

MCP73842-840I/UN: 8.4V Preset Voltage

MCP73842T-840I/UN: 8.4V Preset Voltage,

Tape and Reel

MCP73842T: Dual series cells charge controller with tem-

perature monitor, Tape and Reel

MCP73843:

Single-cell charge controller

MCP73843T: Single-cell charge controller, Tape and Reel

a)

b)

MCP73843-410I/MS: 4.1V Preset Voltage

MCP73843T-410I/MS: 4.1V Preset Voltage,

Tape and Reel

MCP73844:

Dual series cells charge controller

MCP73844T: Dual series cells charge controller,

Tape and Reel

c)

d)

MCP73843-420I/MS: 4.2V Preset Voltage

MCP73843T-420I/MS: 4.2V Preset Voltage,

Tape and Reel

Preset Voltage

410

420

820

840

=

4.1V

4.2V

8.2V

8.4V

Regulation Options

a)

b)

MCP73844-820I/MS: 8.2V Preset Voltage

MCP73844T-820I/MS: 8.2V Preset Voltage,

Tape and Reel

c)

d)

MCP73844-840I/MS: 8.4V Preset Voltage

MCP73844T-840I/MS: 8.4V Preset Voltage,

Tape and Reel

Temperature Range

Package

I

= -40°C to +85°C (Industrial)

MS

UN

=

Plastic Micro Small Outline (MSOP), 8-lead

Plastic Micro Small Outline (MSOP), 10-lead

=

Sales and Support

Data Sheets

Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and

recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:

1. Your local Microchip sales office

2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277

3. The Microchip Worldwide Site (www.microchip.com)

Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.

Customer Notification System

Register on our web site (www.microchip.com/cn) to receive the most current information on our products.

2004 Microchip Technology Inc.

DS21823B-page 21

MCP73841/2/3/4

NOTES:

DS21823B-page 22

2004 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices:

•

Microchip products meet the specification contained in their particular Microchip Data Sheet.

•

Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the

intended manner and under normal conditions.

•

There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our

knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data

Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

•

Microchip is willing to work with the customer who is concerned about the integrity of their code.

Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device

applications and the like is intended through suggestion only

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

No representation or warranty is given and no liability is

assumed by Microchip Technology Incorporated with respect

to the accuracy or use of such information, or infringement of

patents or other intellectual property rights arising from such

use or otherwise. Use of Microchip’s products as critical

components in life support systems is not authorized except

with express written approval by Microchip. No licenses are

conveyed, implicitly or otherwise, under any intellectual

property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,

dsPIC, KEELOQ, MPLAB, PIC, PICmicro, PICSTART,

PRO MATE, PowerSmart and rfPIC are registered

trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries.

AmpLab, FilterLab, microID, MXDEV, MXLAB, PICMASTER,

SEEVAL, SmartShunt and The Embedded Control Solutions

Company are registered trademarks of Microchip Technology

Incorporated in the U.S.A.

Application Maestro, dsPICDEM, dsPICDEM.net,

dsPICworks, ECAN, ECONOMONITOR, FanSense,

FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP,

ICEPIC, Migratable Memory, MPASM, MPLIB, MPLINK,

MPSIM, PICkit, PICDEM, PICDEM.net, PICtail, PowerCal,

PowerInfo, PowerMate, PowerTool, rfLAB, Select Mode,

SmartSensor, SmartTel and Total Endurance are trademarks

of Microchip Technology Incorporated in the U.S.A. and other

countries.

Serialized Quick Turn Programming (SQTP) is a service mark

of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 quality system certification for

its worldwide headquarters, design and wafer fabrication facilities in

Chandler and Tempe, Arizona and Mountain View, California in October

2003. The Company’s quality system processes and procedures are for

®

its PICmicro 8-bit MCUs, KEELOQ^®code hopping devices, Serial

EEPROMs, microperipherals, nonvolatile memory and analog

products. In addition, Microchip’s quality system for the design and

manufacture of development systems is ISO 9001:2000 certified.

2004 Microchip Technology Inc.

DS21823B-page 23

M

WORLDWIDE SALES AND SERVICE

China - Beijing

Korea

AMERICAS

Unit 706B

168-1, Youngbo Bldg. 3 Floor

Samsung-Dong, Kangnam-Ku

Seoul, Korea 135-882

Corporate Office

Wan Tai Bei Hai Bldg.

No. 6 Chaoyangmen Bei Str.

Beijing, 100027, China

Tel: 86-10-85282100

Fax: 86-10-85282104

2355 West Chandler Blvd.

Chandler, AZ 85224-6199

Tel: 480-792-7200

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or

82-2-558-5934

Fax: 480-792-7277

Singapore

Technical Support: 480-792-7627

Web Address: http://www.microchip.com

China - Chengdu

200 Middle Road

#07-02 Prime Centre

Singapore, 188980

Rm. 2401-2402, 24th Floor,

Ming Xing Financial Tower

No. 88 TIDU Street

Atlanta

3780 Mansell Road, Suite 130

Alpharetta, GA 30022

Tel: 770-640-0034

Fax: 770-640-0307

Tel: 65-6334-8870 Fax: 65-6334-8850

Chengdu 610016, China

Tel: 86-28-86766200

Taiwan

Kaohsiung Branch

30F - 1 No. 8

Fax: 86-28-86766599

Boston

Min Chuan 2nd Road

Kaohsiung 806, Taiwan

Tel: 886-7-536-4818

Fax: 886-7-536-4803

China - Fuzhou

2 Lan Drive, Suite 120

Westford, MA 01886

Tel: 978-692-3848

Fax: 978-692-3821

Unit 28F, World Trade Plaza

No. 71 Wusi Road

Fuzhou 350001, China

Tel: 86-591-7503506

Fax: 86-591-7503521

Taiwan

Taiwan Branch

Chicago

11F-3, No. 207

China - Hong Kong SAR

333 Pierce Road, Suite 180

Itasca, IL 60143

Tung Hua North Road

Taipei, 105, Taiwan

Tel: 886-2-2717-7175 Fax: 886-2-2545-0139

Unit 901-6, Tower 2, Metroplaza

223 Hing Fong Road

Tel: 630-285-0071

Fax: 630-285-0075

Kwai Fong, N.T., Hong Kong

Tel: 852-2401-1200

Dallas

EUROPE

Austria

Fax: 852-2401-3431

4570 Westgrove Drive, Suite 160

Addison, TX 75001

Tel: 972-818-7423

Fax: 972-818-2924

China - Shanghai

Durisolstrasse 2

Room 701, Bldg. B

A-4600 Wels

Far East International Plaza

No. 317 Xian Xia Road

Shanghai, 200051

Austria

Detroit

Tel: 43-7242-2244-399

Fax: 43-7242-2244-393

Denmark

Tri-Atria Office Building

32255 Northwestern Highway, Suite 190

Farmington Hills, MI 48334

Tel: 248-538-2250

Tel: 86-21-6275-5700

Fax: 86-21-6275-5060

Regus Business Centre

Lautrup hoj 1-3

China - Shenzhen

Rm. 1812, 18/F, Building A, United Plaza

No. 5022 Binhe Road, Futian District

Shenzhen 518033, China

Tel: 86-755-82901380

Fax: 248-538-2260

Ballerup DK-2750 Denmark

Tel: 45-4420-9895 Fax: 45-4420-9910

Kokomo

France

2767 S. Albright Road

Kokomo, IN 46902

Tel: 765-864-8360

Fax: 765-864-8387

Parc d’Activite du Moulin de Massy

43 Rue du Saule Trapu

Batiment A - ler Etage

91300 Massy, France

Tel: 33-1-69-53-63-20

Fax: 33-1-69-30-90-79

Fax: 86-755-8295-1393

China - Shunde

Room 401, Hongjian Building, No. 2

Los Angeles

Fengxiangnan Road, Ronggui Town, Shunde

District, Foshan City, Guangdong 528303, China

Tel: 86-757-28395507 Fax: 86-757-28395571

18201 Von Karman, Suite 1090

Irvine, CA 92612

Germany

Tel: 949-263-1888

China - Qingdao

Steinheilstrasse 10

D-85737 Ismaning, Germany

Tel: 49-89-627-144-0

Fax: 49-89-627-144-44

Fax: 949-263-1338

Rm. B505A, Fullhope Plaza,

No. 12 Hong Kong Central Rd.

Qingdao 266071, China

San Jose

1300 Terra Bella Avenue

Mountain View, CA 94043

Tel: 650-215-1444

Tel: 86-532-5027355 Fax: 86-532-5027205

Italy

India

Via Quasimodo, 12

20025 Legnano (MI)

Milan, Italy

Divyasree Chambers

1 Floor, Wing A (A3/A4)

No. 11, O’Shaugnessey Road

Bangalore, 560 025, India

Tel: 91-80-22290061 Fax: 91-80-22290062

Japan

Fax: 650-961-0286

Toronto

Tel: 39-0331-742611

Fax: 39-0331-466781

Netherlands

6285 Northam Drive, Suite 108

Mississauga, Ontario L4V 1X5, Canada

Tel: 905-673-0699

Fax: 905-673-6509

P. A. De Biesbosch 14

NL-5152 SC Drunen, Netherlands

Tel: 31-416-690399

Benex S-1 6F

3-18-20, Shinyokohama

ASIA/PACIFIC

Kohoku-Ku, Yokohama-shi

Kanagawa, 222-0033, Japan

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Fax: 31-416-690340

Australia

United Kingdom

Suite 22, 41 Rawson Street

Epping 2121, NSW

Australia

505 Eskdale Road

Winnersh Triangle

Wokingham

Tel: 61-2-9868-6733

Fax: 61-2-9868-6755

Berkshire, England RG41 5TU

Tel: 44-118-921-5869

Fax: 44-118-921-5820

02/17/04

DS21823B-page 24

2004 Microchip Technology Inc.


型号：	MCP73842T-420I/UN
厂家：	MICROCHIP
描述：	Advanced Single or Dual Cell Lithium-Ion/ Lithium-Polymer Charge Management Controllers 高级单节或两节锂离子/锂聚合物充电管理控制器控制器
文件：	总24页 (文件大小：407K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MCP73842T-420I/UN [MICROCHIP]

相关型号：

MCP73842T-820I/MS

MCP73842T-820I/UN

MCP73842T-840I/MS

MCP73842T-840I/UN

MCP73843

MCP73843-410I/MS

MCP73843-410I/UN

MCP73843-420I/MS

MCP73843-420I/UN

MCP73843-420IMS

MCP73843-420IUN

MCP73843-820I/MS