MCP73834T_技术文档

MCP73833/4

Stand-Alone Linear Li-Ion / Li-Polymer Charge

Management Controller

Features

Description

• Complete Linear Charge Management Controller

The MCP73833/4 is a highly advanced linear charge

management controller for use in space-limited, cost

sensitive applications. The MCP73833/4 is available in

a 10-Lead, 3mm x 3mm DFN package or a 10-Lead,

MSOP package. Along with its small physical size, the

low number of external components required makes

the MCP73833/4 ideally suited for portable applica-

tions. For applications charging from a USB port, the

MCP73833/4 can adhere to all the specifications

governing the USB power bus.

- Integrated Pass Transistor

- Integrated Current Sense

- Integrated Reverse Discharge Protection

• Constant Current / Constant Voltage Operation

with Thermal Regulation

• High Accuracy Preset Voltage Regulation:

- 4.2V, 4.35V, 4.4V, or 4.5V, + 0.75%

• Programmable Charge Current: 1A Maximum

• Preconditioning of Deeply Depleted Cells

- Selectable Current Ratio

The MCP73833/4 employs a constant current/constant

voltage charge algorithm with selectable precondition-

ing and charge termination. The constant voltage

regulation is fixed with four available options: 4.20V,

4.35V, 4.40V, or 4.50V, to accomodate new, emerging

battery charging requirements. The constant current

value is set with one external resistor. The

MCP73833/4 limits the charge current based on die

temperature during high power or high ambient condi-

tions. This thermal regulation optimizes the charge

cycle time while maintaining device reliability.

- Selectable Voltage Threshold

• Automatic End-of-Charge Control

- Selectable Current Threshold

- Selectable Safety Time Period

• Automatic Recharge

- Selectable Voltage Threshold

• Two Charge Status Outputs

• Cell Temperature Monitor

Several options are available for the preconditioning

threshold, preconditioning current value, charge

termination value, and automatic recharge threshold.

The preconditioning value and charge termination

value are set as a ratio, or percentage, of the

programmed constant current value. Preconditioning

can be set to 100%. Refer to Section 1.0 “Electrical

Characteristics” for available options and the

“Product Indentification System” for standard

options.

• Low-Dropout Linear Regulator Mode

• Automatic Power-Down when Input Power

Removed

• Under Voltage Lockout

• Numerous Selectable Options Available for a

Variety of Applications:

- Refer to Section 1.0 “Electrical

Characteristics” for Selectable Options

- Refer to the ”Product Identification

System” for Standard Options

The MCP73833/4 is fully specified over the ambient

temperature range of -40°C to +85°C.

• Available Packages:

- 3mm x 3mm DFN-10

- MSOP-10

Package Types

DFN-10

V

1

2

3

4

5

10

9

V

DD

BAT

Applications

THERM

STAT1

STAT2

8

7

PG(TE)

PROG

• Lithium-Ion / Lithium-Polymer Battery Chargers

• Personal Data Assistants

• Cellular Telephones

6

V

SS

MSOP-10

V

1

10

V

DD

BAT

• Digital Cameras

2

3

4

5

9

8

7

6

DD

BAT

• MP3 Players

STAT1

STAT2

THERM

PG(TE)

PROG

• Bluetooth Headsets

• USB Chargers

V

SS

DS22005A-page 1

MCP73833/4

Typical Application

1A Li-Ion Battery Charger

1,2

9,10

V_IN

V_DD

V_BAT

Single

Li-Ion

Cell

+

-

1 µF

3

4

7

8

6

5

THERM

STAT1

470Ω

STAT2 PROG

1 kΩ

T

10 kΩ

PG

V_SS

MCP73833

Functional Block Diagram

V

DD

Direction

Control

10 µA

6 µA

V

BAT

CURRENT

LIMIT

G=0.001

+

-

1 kΩ

G=0.001

PROG

CA

+

-

Reference

Generator

111 kΩ

V

(1.21V)

REF

310 kΩ

72.7 kΩ

10 kΩ

+

-

PRECONDITION

470.6 kΩ

48 kΩ

6 µA

+

-

TERMINATIO N

CHARGE

+

-

6 kΩ

VA

+

-

157.3 kΩ

50 µA

+

-

SHDN

LDO

175 kΩ

+

-

STAT1

STAT2

PG (TE)

Charge

Control,

Timer,

and

Status

Logic

54 kΩ

+

-

121 kΩ

UVLO

HTVT

LTVT

V

SS

+

-

470.6kΩ

THERM

+

-

121 kΩ

1 MΩ

DS22005A-page 2

MCP73833/4

*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. Exposure to maximum rating conditions

for extended periods may affect device reliability.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings

V_DD........................................................................7.0V

All Inputs and Outputs w.r.t. V_SS.....-0.3 to (V_DD+0.3)V

Maximum Junction Temperature, T_J. Internally Limited

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

ESD protection on all pins:

Human Body Model (HBM)

(1.5 kΩ in Series with 100 pF)............................... ≥ 4 kV

Machine Model (MM)

(200 pF, No Series Resistance) ...........................300V

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 6V, T_A=-40°C to 85°C.

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

Parameters

Supply Input

Sym

Min

Typ

Max

Units

Conditions

Supply Voltage

V_DD

3.75

—

6

V

Charging

V_REG(Typ)

+0.3V

Charge Complete, Standby

Supply Current

I_SS

—

2000

150

3000

300

µA

Charging

Charge Complete

100

300

Standby (No Battery or PROG

Floating)

—

50

100

µA

Shutdown (V_DD< V_BAT, or

V

_DD< V_STOP)

UVLO Start Threshold

UVLO Stop Threshold

UVLO Hysteresis

V_START

V_STOP

V_HYS

3.4

3.3

—

3.55

3.45

100

3.7

3.6

—

V

V_DDLow to High

V_DDHigh to Low

mV

Voltage Regulation (Constant Voltage Mode, System Test Mode)

Regulated Output Voltage

V_REG

4.168

4.318

4.367

4.467

—

4.20

4.35

4.40

4.50

0.10

4.232

4.382

4.433

4.533

0.30

V

V_DD=[V_REG(Typ)+1V]

I_OUT=10 mA

V

T_A=-5°C to +55°C

V

Line Regulation

|(ΔV_BAT/V_BAT

)

|

%/V

V_DD=[V_REG(Typ)+1V] to 6V

/ΔV_DD

|

I

_OUT=10 mA

I_OUT=10 mA to 100 mA

_DD=[V_REG(Typ)+1V]

Load Regulation

|ΔV_BAT/ V_BAT

—

0.10

0.30

%

V

Supply Ripple Attenuation

PSRR

—

58

47

25

—

dB

I_OUT=10 mA, 10Hz to 1 kHz

I_OUT=10 mA, 10Hz to 10 kHz

I_OUT=10 mA, 10Hz to 1 MHz

Current Regulation (Fast Charge Constant Current Mode)

Fast Charge Current Regulation

I_REG

90

100

110

mA

PROG = 10 kΩ

PROG = 1.0 kΩ

T_A=-5°C to +55°C

PROG < 833Ω

900

1000

1100

Maximum Output Current Limit

I_MAX

—

1200

—

mA

DS22005A-page 3

MCP73833/4

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 6V, T_A=-40°C to 85°C.

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

Parameters

Sym

Min

Typ

Max

Units

Conditions

Preconditioning Current Regulation (Trickle Charge Constant Current Mode)

Precondition Current Ratio

I_PREG/ I_REG

7.5

15

30

—

10

20

12.5

25

50

—

%

PROG = 1.0 kΩ to 10 kΩ

T_A=-5°C to +55°C

40

%

100

66.5

71.5

100

%

Precondition Voltage Threshold

Ratio

V_PTH/ V_REG

64

69

—

70

75

—

%

V_BATLow to High

V_BATHigh to Low

%

Precondition Hysteresis

V_PHYS

mV

Charge Termination

Charge Termination Current Ratio

I_TERM/ I_REG

3.75

5.6

7.5

15

5

6.25

9.4

%

PROG = 1.0 kΩ to 10 kΩ

7.5

10

20

T_A=-5°C to +55°C

12.5

25

Automatic Recharge

Recharge Voltage Threshold Ratio

V_RTH/ V_REG

—

94.0

96.5

—

%

V_BATHigh to Low

Pass Transistor ON-Resistance

ON-Resistance

R_DSON

—

300

—

mΩ

V_DD= 3.75V

T_J= 105°C

Battery Discharge Current

Output Reverse Leakage Current

I_DISCHARGE

—

0.15

0.25

0.15

-5.5

2

µA

PROG Floating

V_DD< V_BAT

2

V_DD< V_STOP

-15

Charge Complete

Status Indicators - STAT1, STAT2, PG

Sink Current

I_SINK

V_OL

I_LK

—

15

0.4

25

1

mA

V

Low Output Voltage

I_SINK= 4 mA

Input Leakage Current

PROG Input

0.01

1

µA

High Impedance, 6V on pin

Charge Impedance Range

Standy Impedance

R_PROG

1

—

20

kΩ

70

200

Minimum Impedance for

Standby

Thermistor Bias

Thermistor Current Source

Thermistor Comparator

Upper Trip Threshold

I_THERM

47

50

53

µA

2 kΩ < R_THERM< 50 kΩ

V_THERMLow to High

V_THERMHigh to Low

V_T1

V_T1HYS

V_T2

1.20

—

1.23

-50

1.26

—

V

mV

V

Upper Trip Point Hysteresis

Lower Trip Threshold

0.235

—

0.25

50

0.265

—

Lower Trip Point Hysteresis

System Test (LDO) Mode

Input High Voltage Level

THERM Input Sink Current

Bypass Capacitance

V_T2HYS

mV

(V -0.1)

DD

V_IH

—

6

—

20

—

V

I_SINK

C_BAT

3

1

µA

µF

Stand-by or system test mode

I_OUT< 250 mA

—

4.7

I_OUT> 250 mA

DS22005A-page 4

MCP73833/4

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 6V, T_A=-40°C to 85°C.

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

Parameters

Sym

Min

Typ

Max

Units

Conditions

Automatic Power Down

Automatic Power Down Entry

Threshold

V_PD

—

V_BAT

50 mV

+

—

V

2.3V < V_BAT< V_REG

V_DDFalling

Automatic Power Down Exit Thresh-

old

V_PDEXIT

V_BAT

150 mV

+

2.3V < V_BAT< V_REG

V_DDRising

Timer Enable Input (TE)

Input High Voltage Level

Input Low Voltage Level

Input Leakage Current

Thermal Shutdown

V_IH

V_IL

I_LK

2.0

—

0.6

1

V

—

0.01

µA

V_TE= 6V

Die Temperature

T_SD

—

150

10

—

°C

Die Temperature Hysteresis

T_SDHYS

AC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 6V, T_A=-40°C to 85°C.

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

Parameters

UVLO Start Delay

Sym

Min

Typ

Max

Units

Conditions

t_START

—

5

ms

V_DDLow to High

Current Regulation

Transition Time Out of Preconditioning

Current Rise Time Out of Preconditioning

Preconditioning Comparator Filter Time

Termination Comparator Filter Time

Charge Comparator Filter Time

Thermistor Comparator Filter Time

Elapsed Timer

t_DELAY

t_RISE

t_PRECON

t_TERM

t_CHARGE

t_THERM

—

1

ms

V_BAT<V_PTHto V_BAT>V_PTH

I_OUTRising to 90% of I_REG

Average V_BATRise/Fall

Average I_OUTFalling

1

0.4

1.3

3.2

Average V_BATFalling

Average THERM Rise/Fall

Elapsed Timer Period

t_ELAPSED

0

Hours Timer Disabled

3.6

5.4

7.2

4.0

6.0

8.0

4.4

6.6

8.8

Hours

Status Indicators

Status Output turn-off

Status Output turn-on

t_OFF

t_ON

—

200

µs

I_SINK= 1 mA to 0 mA

I_SINK= 0 mA to 1 mA

TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise specified, all limits apply for V_DD= [V_REG(Typ)+0.3V] to 6V.

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

Parameters

Temperature Ranges

Symbol

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

41

—

°C/W

4-Layer JC51-7 Standard

Board, Natural Convection

Thermal Resistance, 3mm x 3mm DFN-10

4-Layer JC51-7 Standard

Board, Natural Convection

DS22005A-page 5

MCP73833/4

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_DD= 5.2V, V_REG= 4.20V, I_OUT= 10 mA and T_A= +25°C, Constant-voltage mode.

4.210

4.205

4.200

4.195

4.190

4.185

4.180

4.175

4.170

1000

100

10

MCP73833

I_OUT= 10 mA

I_OUT= 100 mA

I_OUT= 500 mA

I_OUT= 900 mA

1

3

5

7

9

11 13 15 17 19 21

4.50

4.75

5.00

5.25

5.50

5.75

6.00

Programming Resistor (k:)

Supply Voltage (V)

FIGURE 2-1:

Battery Regulation Voltage

FIGURE 2-4:

Charge Current (I

) vs.

OUT

(V

) vs. Supply Voltage (V ).

Programming Resistor (R

).

BAT

DD

PROG

4.220

104

103

102

101

100

99

MCP73833

R_PROG= 10 k:

I_OUT= 10 mA

I_OUT= 100 mA

4.210

4.200

4.190

4.180

I_OUT= 500 mA

98

4.170

I_OUT= 900 mA

97

4.160

96

4.50

4.75

5.00

5.25

5.50

5.75

6.00

Supply Voltage (V)

Ambient Temperature (°C)

FIGURE 2-2:

Battery Regulation Voltage

FIGURE 2-5:

Charge Current (I

) vs.

OUT

(V ) vs. Ambient Temperature (T ).

Supply Voltage (V ).

BAT

A

DD

1004

1002

1000

998

996

994

992

990

988

986

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

R_PROG= 1 k:

+85°C

-40°C

+25°C

3.00

3.20

3.40

3.60

3.80

4.00

4.20

4.50

4.75

5.00

5.25

5.50

5.75

6.00

Battery Regulation Voltage (V)

Supply Voltage (V)

FIGURE 2-3:

Output Leakage Current

FIGURE 2-6:

Charge Current (I

) vs.

OUT

(I ) vs. Battery Regulation Voltage

Supply Voltage (V ).

DISCHARGE

DD

(V

).

BAT

DS22005A-page 6

MCP73833/4

TYPICAL PERFORMANCE CURVES (Continued)

Note: Unless otherwise indicated, V_DD= 5.2V, V_REG= 4.20V, I_OUT= 10 mA and T_A= +25°C, Constant-voltage mode.

52.0

51.5

51.0

50.5

50.0

49.5

49.0

48.5

48.0

120

100

80

60

40

20

0

R_PROG= 10 k:

Junction Temperature (°C)

Ambient Temperature (°C)

FIGURE 2-7:

Charge Current (I

) vs.

FIGURE 2-10:

Thermistor Bias Current

OUT

Junction Temperature (T ).

(I

) vs. Ambient Temperature (T ).

J

THRERM

A

0

-10

-20

-30

-40

-50

-60

-70

1200

1000

800

600

400

200

0

V_AC= 100 mVp-p

I_OUT= 10 mA

C_OUT= 4.7 µF, X7R

Ceramic

R_PROG= 1 k:

0.01

0.1

1

10

100

1000

Junction Temperature (°C)

Frequency (kHz)

FIGURE 2-8:

Charge Current (I

) vs.

FIGURE 2-11:

Power Supply Ripple

OUT

Junction Temperature (T ).

Rejection (PSRR).

J

52.0

51.5

51.0

50.5

50.0

49.5

49.0

48.5

48.0

0

V_AC= 100 mVp-p

I_OUT= 100 mA

C_OUT= 4.7 µF, X7R

Ceramic

-10

-20

-30

-40

-50

-60

4.50

4.75

5.00

5.25

5.50

5.75

6.00

0.01

0.1

1

10

100

1000

Supply Voltage (V)

Frequency (kHz)

FIGURE 2-9:

Thermistor Bias Current

FIGURE 2-12:

Power Supply Ripple

(I

) vs. Supply Voltage (V ).

Rejection (PSRR).

THRERM

DD

DS22005A-page 7

MCP73833/4

TYPICAL PERFORMANCE CURVES (Continued)

Note: Unless otherwise indicated, V_DD= 5.2V, V_REG= 4.20V, I_OUT= 10 mA and T_A= +25°C, Constant-voltage mode.

14

12

10

8

0.10

1.40

1.20

1.00

0.80

0.60

0.40

0.20

0.00

-0.20

0.10

0.05

0.00

-0.05

-0.10

-0.15

-0.20

-0.25

-0.30

-0.05

-0.10

-0.15

-0.20

-0.25

-0.30

6

4

2

I_OUT= 10 mA

C_OUT= 4.7 µF, X7R

Ceramic

C_OUT= 4.7 µF, X7R

Ceramic

0

-2

Time (µs)

FIGURE 2-13:

Line Transient Response.

FIGURE 2-16:

Load Transient Response.

14

12

10

8

0.10

0.05

0.00

-0.05

-0.10

-0.15

5.0

4.0

3.0

2.0

200

160

120

80

6

4

MCP73833-FCI/MF

_DD= 5.2V

R_PROG= 10.0 k:

2

I_OUT= 100 mA

C_OUT= 4.7 µF, X7R

Ceramic

-0.20

-0.25

-0.30

1.0

0.0

40

V

0

-2

0

Time (Minutes)

Time (µs)

FIGURE 2-14:

Line Transient Response.

FIGURE 2-17:

Complete Charge Cycle

(180 mA Li-Ion Battery).

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

-0.05

0.04

0.02

0.00

-0.02

-0.04

-0.06

5.0

4.0

3.0

2.0

1.0

0.0

200

160

120

80

-0.08

MCP73833-FCI/MF

V_DD= 5.2V 40

R_PROG= 10.0 k:

C_OUT= 4.7 µF, X7R

Ceramic

-0.10

-0.12

0

2

4

6

8

10

Time (µs)

Time (Minutes)

FIGURE 2-15:

Load Transient Response.

FIGURE 2-18:

Charge Cycle Start -

Preconditioning (180 mAh Li-Ion Battery).

DS22005A-page 8

MCP73833/4

3.0

PIN DESCRIPTIONS

Descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

Pin No.

Symbol

Function

DFN

MSOP

1

2

1

2

V_DD

Battery Management Input Supply

Charge Status Output

3

STAT1

STAT2

V_SS

4

Charge Status Output

5

Battery Management 0V Reference

6

PROG

PG, TE

THERM

V_BAT

Current Regulation Set and Charge Control Enable

7

MCP73833: Power Good output, MCP73834: Timer Enable input

Thermistor input

8

9

Battery Charge Control Output

10

V_BAT

Battery Charge Control Output

3.1

Battery Management Input Supply

(V_DD

3.6

Timer Enable Input (TE)

MCP73834 Only

)

A supply voltage of [V_REG(typ.) + 0.3V] to 6V is

recommended. Bypass to V_SSwith a minimum of 1 µF.

The timer enable (TE) input option is used to enable or

disable the internal timer. A low signal on this pin

enables the internal timer and a high signal disables

the internal timer. The TE input can be used to disable

the timer when the charger is supplying current to

charge the battery and power the system load. The TE

input is compatible with 1.8V logic.

3.2

Charge Status Outputs (STAT1,

STAT2)

STAT1 and STAT2 are open-drain logic outputs for con-

nection to a LED for charge status indication.

Alternatively, a pull-up resistor can be applied for

interfacing to a host microcontroller.

3.7

Thermistor Input (THERM)

An internal 50 µA current source provides the bias for

most common 10 kΩ negative-temperature coefficient

thermistors (NTC). The MCP73833/4 compares the

voltage at the THERM pin to factory set thersholds of

1.20V and 0.25V, typically.

3.3

Battery Management 0V Reference

(V_SS)

Connect to negative terminal of battery and input

supply.

3.8

Battery Charge Control Output

(V_BAT

3.4

Current Regulation Set (PROG)

)

Preconditioning, fast charge, and termination currents

are scaled by placing a resistor from PROG to V_SS

Connect to positive terminal of battery. Drain terminal

of internal P-channel MOSFET pass transistor. Bypass

to V_SSwith a minimum of 1 µF to ensure loop stability

when the battery is disconnected.

.

The charge management controller can be disabled by

allowing the PROG input to float.

3.5

Power Good Indication (PG)

MCP73833 Only

The power good (PG) option is a pseudo open-drain

output. The PG output can sink current, but not source

current. However, there is a diode path back to the

input, and, as such, the PG output should only be

pulled up to the input. The PG output is low whenever

the input to the MCP73833 is above the UVLO

threshold and greater than the battery voltage.

DS22005A-page 9

MCP73833/4

4.0

FUNCTIONAL DESCRIPTION

The MCP73833/4 is a highly advanced linear charge

management controller. Refer to the functional block

diagram and Figure 4-1 that depicts the operational

flow algorithm from charge initiation to completion and

automatic recharge.

* Continuously Monitored

SHUTDOWN MODE *

< V

V

DD

UVLO

V

< V

BAT

DD

STAT1 = HI-Z

STAT2 = HI-Z

PG = HI-Z

SYSTEM TEST (LDO) MODE

> (V - 100 mv)

STANDBY MODE *

V

THERM

DD

V

(V

+ 100 mv)

BAT

REG

PROG > 20 kΩ

PROG > 200 kΩ

STAT1 = LOW

STAT2 = LOW

PG = LOW

STAT1 = HI-Z

STAT2 = HI-Z

PG = LOW

Timer Suspended

V

< V

PTH

BAT

PRECONDITIONING MODE

Charge Current (I

PREG

STAT1 = LOW

STAT2 = Hi-Z

PG = LOW

Timer Reset

V

> V

PTH

BAT

V

> V

PTH

BAT

FAST CHARGE MODE

TIMER FAULT

TEMPERATURE FAULT

Charge Current (I

No Charge Current

REG

STAT1 = LOW

STAT1 = Hi-Z

STAT2 = Hi-Z

PG = LOW

Timer Enabled

STAT2 = Hi-Z

PG = LOW

Timer Suspended

STAT2 = Hi-Z

PG = LOW

Timer Suspended

Timer Expired

< V

RTH

V

BAT

V

= V

REG

BAT

CONSTANT VOLTAGE MODE

Charge Voltage (V

REG

STAT1 = LOW

STAT2 = Hi-Z

PG = LOW

V

< I

TERM

BAT

Timer Expired

CHARGE COMPLETE MODE

No Charge Current

STAT1 = HI-Z

STAT2 = LOW

PG = LOW

Timer Reset

FIGURE 4-1:

Flow Chart.

DS22005A-page 10

MCP73833/4

4.1

Under Voltage Lockout (UVLO)

4.4

Constant Current - Fast Charge

Mode

An internal under voltage lockout (UVLO) circuit

monitors the input voltage and keeps the charger in

shutdown mode until the input supply rises above the

UVLO threshold. The UVLO circuitry has a built in

hysteresis of 100 mV.

During the constant current mode, the programmed

charge current is supplied to the battery or load. The

charge current is established using a single resistor

from PROG to V_SS. The program resistor and the

charge current are calculated using Equation 4-1:

In the event a battery is present when the input power

is applied, the input supply must rise +150 mV above

the battery voltage before the MCP73833/4 becomes

operational.

EQUATION 4-1:

1000V

I_REG= ----------------

R_PROG

Where:

R_PROG

I_REG

The UVLO circuit places the device in shutdown mode

if the input supply falls to within +50 mV of the battery

voltage.

=

kilo-ohms

milliampere

The UVLO circuit is always active. At any time the input

supply is below the UVLO threshold or within +50 mV

of the voltage at the V_BATpin, the MCP73833/4 is

placed in a shutdown mode.

Constant current mode is maintained until the voltage

at the V_BATpin reaches the regulation voltage, V_REG

.

When constant current mode is invoked, the internal

timer is reset.

During any UVLO condition, the battery reverse

discharge current shall be less than 2 µA.

4.4.1

TIMER EXPIRED DURING CONSTANT

CURRENT - FAST CHARGE MODE

4.2

Charge Qualification

If the internal timer expires before the recharge voltage

threshold is reached, a timer fault is indicated and the

charge cycle terminates. The MCP73833/4 remains in

this condition until the battery is removed, the input

power is removed, or the PROG pin is opened. If the

battery is removed or the PROG pin is opened, the

MCP73833/4 enters the Standby mode where it

remains until a battery is reinserted or the PROG pin is

reconnected. If the input power is removed, the

MCP73833/4 is in Shutdown. When the input power is

reapplied, a normal start-up sequence ensues.

For a charge cycle to begin, all UVLO conditions must

be met and a battery or output load must be present.

A charge current programming resistor must be

connected from PROG to V_SS. If the PROG pin is open

or floating, the MCP73833/4 is disabled and the battery

reverse discharge current is less than 2 µA. In this

manner, the PROG pin acts as a charge enable and

can be used as a manual shutdown.

If the input supply voltage is above the UVLO

threshold,

but

below

V_REG(Typ)+0.3V,

the

MCP73833/4 will pulse the STAT1 and PG outputs as

the device determines if a battery is present.

4.5

Constant Voltage Mode

When the voltage at the V_BATpin reaches the

regulation voltage, V_REG, constant voltage regulation

begins. The regulation voltage is factory set to 4.20V,

4.35V, 4.40V, or 4.50V with a tolerance of ± 0.75%.

4.3

Preconditioning

If the voltage at the V_BATpin is less than the

preconditioning threshold, the MCP73833/4 enters a

preconditioning or trickle charge mode. The

preconditioning threshold is factory set. Refer to

4.6

Charge Termination

Section 1.0

“Electrical

Characteristics”

for

preconditioning threshold options.

The charge cycle is terminated when, during constant

voltage mode, the average charge current diminishes

below a percentage of the programmed charge current

(established with the value of the resistor connected to

the PROG pin) or the internal timer has expired. A 1 ms

filter time on the termination comparator ensures that

transient load conditions do not result in premature

charge cycle termination. The percentage or ratio of the

current is factory set. The timer period is factory set

and can be disabled. Refer to Section 1.0 “Electrical

Characteristics” for charge termination current ratio

and timer period options.

In this mode, the MCP73833/4 supplies a percentage

of the charge current (established with the value of the

resistor connected to the PROG pin) to the battery. The

percentage or ratio of the current is factory set. Refer to

Section 1.0

“Electrical

Characteristics”

for

preconditioning current options.

When the voltage at the V_BATpin rises above the pre-

conditioning threshold, the MCP73833/4 enters the

constant current or fast charge mode.

The charge current is latched off and the MCP73833/4

enters a charge complete mode.

DS22005A-page 11

MCP73833/4

4.7

Automatic Recharge

4.9

Thermal Shutdown

The MCP73833/4 continuously monitors the voltage at

the V_BATpin in the charge complete mode. If the

voltage drops below the recharge threshold, another

charge cycle begins and current is once again supplied

to the battery or load. The recharge threshold is factory

set. Refer to Section 1.0 “Electrical Characteristics”

for recharge threshold options.

The MCP73833/4 suspends charge if the die

temperature exceeds +150°C. Charging will resume

when the die temperature has cooled by approximately

+10°C. The thermal shutdown is a secondary safety

feature in the event that there is a failure within the

thermal regulation circuitry.

4.8

Thermal Regulation

The MCP73833/4 limits the charge current based on

the die temperature. The thermal regulation optimizes

the charge cycle time while maintaining device reliabil-

ity. Figure 4-2 depicts the thermal regulation for the

MCP73833/4.

1200

R_PROG= 1 kΩ

1000

800

600

400

200

0

Junction Temperature (°C)

FIGURE 4-2:

Thermal Regulation.

DS22005A-page 12

MCP73833/4

pass transistor and holding the timer value. The charge

cycle resumes when the voltage at the THERM pin

returns to the normal range.

5.0

DETAILED DESCRIPTION

5.1

Analog Circuitry

If temperature monitoring is not required, place a

standard 10 kΩ resistor from THERM to V_SS

5.1.1

BATTERY MANAGEMENT INPUT

SUPPLY (V

)

DD

5.1.4.1

System Test (LDO) Mode

The V_DDinput is the input supply to the MCP73833/4.

The MCP73833/4 automatically enters a Power-down

mode if the voltage on the V_DDinput falls below the

UVLO voltage (V_STOP). This feature prevents draining

the battery pack when the V_DDsupply is not present.

The MCP73833/4 can be placed in a system test mode.

In this mode, the MCP73833/4 operates as a low

dropout linear regulator (LDO). The output voltage is

regulated to the factory set voltage regulation option.

The available output current is limitted to the

programmed fast charge current. For stability, the V_BAT

output must be bypassed to V_SSwith a minimum

capacitance of 1 µF for output currents up to 250 mA.

A minimum capacitance of 4.7 µF is required for output

currents above 250 mA.

5.1.2

CURRENT REGULATION SET

(PROG)

Fast charge current regulation can be scaled by placing

a programming resistor (R_PROG) from the PROG input

to V_SS. The program resistor and the charge current

are calculated using the Equation 5-1:

The system test mode is entered by driving the THERM

input greater than (V_DD-100 mV) with no battery

connected to the output. In this mode, the MCP73833/4

can be used to power the system without a battery

present.

EQUATION 5-1:

1000V

R_PROG

I_REG= ----------------

Where:

R_PROG

I_REG

Note 1: I_THERMis disabled during shutdown,

=

kilo-ohms

milliampere

stand-by, and system test modes.

2: A pull-down current source on the

THERM input is active only in stand-by

and system test modes.

The preconditioning trickle-charge current and the

charge termination current are ratiometric to the fast

charge current based on the selected device options.

3: During system test mode, the PROG

input sets the available output current

limit.

5.1.3

BATTERY CHARGE CONTROL

OUTPUT (V

)

BAT

4: System test mode shall be exited by

releasing the THERM input or cycling

input power.

The battery charge control output is the drain terminal

of an internal P-channel MOSFET. The MCP73833/4

provides constant current and voltage regulation to the

battery pack by controlling this MOSFET in the linear

region. The battery charge control output should be

connected to the positive terminal of the battery pack.

5.2

Digital Circuitry

5.2.1

STATUS INDICATORS AND POWER

GOOD (PG - OPTION)

5.1.4

TEMPERATURE QUALIFICATION

(THERM)

The charge status outputs have two different states:

Low (L), and High Impedance (Hi-Z). The charge status

outputs can be used to illuminate LEDs. Optionally, the

charge status outputs can be used as an interface to a

host microcontroller. Table 5-1 summarize the state of

the status outputs during a charge cycle.

The MCP73833/4 continuously monitors battery

temperature during a charge cycle by measuring the

voltage between the THERM and V_SSpins. An internal

50 µA current source provides the bias for most

common 10 kΩ negative-temperature coefficient

(NTC) or positive-temperature coefficient (PTC)

thermistors.The current source is controlled, avoiding

measurement sensitivity to fluctuations in the supply

voltage (V_DD). The MCP73833/4 compares the voltage

at the THERM pin to factory set thersholds of 1.20V

and 0.25V, typically. Once a volage outside the

thresholds is detected during a charge cycle, the

MCP73833/4 immediately suspends the charge cycle.

The MCP73833/4 suspends charge by turning off the

TABLE 5-1:

STATUS OUTPUTS

CHARGE CYCLE STATE

STAT1 STAT2

PG

Shutdown

Hi-Z

L

Hi-Z

L

Hi-Z

L

Standby

Charge in Progress

Charge Complete (EOC)

Temperature Fault

Timer Fault

L

Hi-Z

L

Hi-Z

L

System Test Mode

L

DS22005A-page 13

MCP73833/4

5.2.2

POWER GOOD (PG) OPTION

5.2.4

DEVICE DISABLE (PROG)

The power good (PG) option is a pseudo open-drain

output. The PG output can sink current, but not source

current. However, there is a diode path back to the

input, and as such, the PG output should only be pulled

up to the input. The PG output is low whenever the

input to the MCP73833 is above the UVLO threshold

and greater than the battery voltage. If the supply volt-

age is above the UVLO, but below V_REG(Typ)+0.3V,

the MCP73833 will pulse the PG output as the device

determines if a battery is present.

The current regulation set input pin (PROG) can be

used to terminate a charge at any time during the

charge cycle, as well as to initiate a charge cycle or

initiate a recharge cycle.

Placing a programming resistor from the PROG input to

V_SSenables the device. Allowing the PROG input to

float or by applying a logic-high input signal, disables

the device and terminates a charge cycle. When

disabled, the device’s supply current is reduced to

100 µA, typically.

5.2.3

TIMER ENABLE (TE) OPTION

The timer enable (TE) input option is used to enable or

disable the internal timer. A low signal on this pin

enables the internal timer and a high signal disables

the internal timer. The TE input can be used to disable

the timer when the charger is supplying current to

charge the battery and power the system load. The TE

input is compatible with 1.8V logic.

DS22005A-page 14

MCP73833/4

6.0

APPLICATIONS

The MCP73833/4 is designed to operate in conjunction

with a host microcontroller or in stand-alone applica-

tions. The MCP73833/4 provides the preferred charge

algorithm for Lithium-Ion and Lithium-Polymer cells

Constant-current followed by Constant-voltage.

Figure 6-1 depicts a typical stand-alone application

circuit, while Figures 6-2 and 6-3 depict the

accompanying charge profile.

Li-Ion Battery Charger

1,2

9,10

V_BAT

V_DD

+

-

Single

Li-Ion

Cell

C

IN

C_OUT

LED LED LED

3

4

7

8

6

5

STAT1

STAT2

PG

THERM

PROG

V_SS

Regulated

Wall Cube

R_LED

R_T1

R_LED

R_PROGR_T2

T 10 kΩ

R_LED

MCP73833

FIGURE 6-1:

Typical Application Circuit.

6.1

Application Circuit Design

5.0

4.0

3.0

2.0

1.0

0.0

2.00

1.60

1.20

0.80

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 battery charger

and the ambient cooling air. The worst-case situation is

when the device has transitioned from the

Preconditioning mode to the Constant-current mode. In

this situation, the battery charger has to dissipate the

maximum power. A trade-off must be made between

the charge current, cost and thermal requirements of

the charger.

MCP73833-FCI/MF

_DD= 5.2V

_PROG= 1.00 k:

0.40

0.00

V

R

Time (Minutes)

6.1.1

COMPONENT SELECTION

FIGURE 6-2:

Typical Charge Profile with

Selection of the external components in Figure 6-1 is

crucial to the integrity and reliability of the charging

system. The following discussion is intended as a guide

for the component selection process.

Thermal Regulation (1700 mAh Li-Ion Battery).

5.0

4.0

3.0

2.0

1.0

0.0

2.00

1.60

1.20

0.80

0.40

0.00

6.1.1.1

Current Programming Resistor

(R

)

PROG

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.

MCP73833-FCI/MF

_DD= 5.2V

R_PROG= 1.00 k:

V

Time (Minutes)

FIGURE 6-3:

Typical Charge Cycle Start

with Thermal Regulation (1700 mAh Li-Ion

Battery).

DS22005A-page 15

MCP73833/4

6.1.1.2

Thermal Considerations

6.1.1.5

Charge Inhibit

The worst-case power dissipation in the battery

charger occurs when the input voltage is at the

maximum and the device has transitioned from the

Preconditioning mode to the Constant-current mode. In

this case, the power dissipation is:

The current regulation set input pin (PROG) can be

used to terminate a charge at any time during the

charge cycle, as well as to initiate a charge cycle or

initiate a recharge cycle.

Placing a programming resistor from the PROG input to

V_SSenables the device. Allowing the PROG input to

float or by applying a logic-high input signal, disables

the device and terminates a charge cycle. When

disabled, the device’s supply current is reduced to

100 µA, typically.

PowerDissipation = (V

– V

) × I

PTHMIN REGMAX

DDMAX

Where:

V_DDMAX

I_REGMAX

V_PTHMIN

=

the maximum input voltage

the maximum fast charge current

6.1.1.6

Temperature Monitoring

the minimum transition threshold

voltage

The charge temperature window can be set by placing

fixed value resistors in series-parallel with a thermistor.

The resistance values of R_T1and R_T2can be

calculated with the following equations in order to set

the temperature window of interest.

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

is:

PowerDissipation = (5.5V – 2.7V) × 550mA = 1.54W

For NTC thermistors:

R_T2× R_COLD

24kΩ = R_T1+ ---------------------------------

R_T2+ R_COLD

This power dissipation with the battery charger in the

MSOP-10 package will cause thermal regulation to be

entered as depicted in Figure 6-3. Alternatively, the

3 mm x 3 mm DFN package could be utilized to reduce

charge cycle times.

R_T2× R_HOT

5kΩ = R_T1+ ----------------------------

R

_T2+ R_HOT

Where:

_T1is the fixed series resistance

6.1.1.3

External Capacitors

R

The MCP73833/4 is stable with or without a battery

load. In order to maintain good AC stability in the Con-

stant-voltage mode, a minimum capacitance of 4.7 µF

is recommended to bypass the V_BATpin to V_SS. This

capacitance provides compensation when there is no

battery load. In addition, the battery and interconnec-

tions 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.

R_T2is the fixed parallel resistance

R_COLDis the thermistor resistance at the

lower temperature of interest

R_HOTis the thermistor resistance at the upper

temperature of interest.

For example, by utilizing a 10 kΩ at 25C NTC

thermistor with a sensitivity index, β, of 3892, the

charge temperature range can be set to 0C - 50C by

placing a 1.54 kΩ resistor in series (R_T1), and a

69.8 kΩ resistor in parallel (R_T2) with the thermistor as

depicted in Figure 6-1.

Virtually any good quality output filter capacitor can be

used, independent of the capacitor’s minimum

Effective Series Resistance (ESR) value. The actual

value of the capacitor (and its associated ESR)

depends on the output load current. A 4.7 µF ceramic,

tantalum or aluminum electrolytic capacitor at the

output is usually sufficient to ensure stability for output

currents up to a 500 mA.

6.1.1.7

Charge Status Interface

A status output provides information on the state of

charge. The output can be used to illuminate external

LEDs or interface to a host microcontroller. Refer to

Table 5-1 for a summary of the state of the status

output during a charge cycle.

6.1.1.4

Reverse-Blocking Protection

The MCP73833/4 provides protection from a faulted or

shorted input. Without the protection, a faulted or

shorted input would discharge the battery pack through

the body diode of the internal pass transistor.

DS22005A-page 16

MCP73833/4

6.2

PCB Layout Issues

For optimum voltage regulation, place the battery pack

as close as possible to the device’s V_BATand V_SSpins,

recommended to minimize voltage drops along the

high current-carrying PCB traces.

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

vias in the heatsink pad can help conduct more heat to

the backplane of the PCB, thus reducing the maximum

junction temperature. Figures 6-4 and 6-5 depict a

typical layout with PCB heatsinking.

MCP73833

V_SS

C_IN

V_DD

C_OUT

V_BAT

STAT1

THERM

STAT2

PG

R_PROG

FIGURE 6-4:

Typical Layout (Top).

V_SS

V_DD

V_BAT

FIGURE 6-5:

Typical Layout (Bottom).

DS22005A-page 17

MCP73833/4

7.0

7.1

PACKAGING INFORMATION

Package Marking Information

10-Lead DFN

Example:

Marking

Code

Marking

Code

Part Number *

1

2

3

4

5

10

9

1

10

9

XXXX

XYWW

NNN

AAAA

0633

256

2

3

4

5

MCP73833-AMI/MF

MCP73833-BZI/MF

MCP73833-FCI/MF

MCP73833-GPI/MF

MCP73833-NVI/MF

MCP73833-CNI/MF

AAAA

AAAB

AAAC

AAAD

AAAF

AAAK

8

7

MCP73834-FCI/MF

MCP73834-GPI/MF

MCP73834-NVI/MF

MCP73834-CNI/MF

BAAC

BAAD

BAAF

BAAK

6

* Consult Factory for Alternative Device Options.

Example:

10-Lead MSOP

Marking

Code

Marking

Code

Part Number *

MCP73833-AMI/UN

MCP73833-BZI/UN

MCP73833-FCI/UN

MCP73833-GPI/UN

MCP73833-NVI/UN

MCP73833-CNI/UN

833AMI

8336SI

633256

XXXXXX

YWWNNN

833BZI

833FCI MCP73834-FCI/UN

833GPI MCP73834-GPI/UN

833NVI MCP73834-NVI/UN

833CNI MCP73834-CNI/UN

834FCI

834GPI

834NVI

834CNI

* Consult Factory for Alternative Device Options.

Legend: XX...X Customer-specific information

Y

YY

WW

NNN

Year code (last digit of calendar year)

Year code (last 2 digits of calendar year)

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

Alphanumeric traceability code

e

3

Pb-free JEDEC designator for Matte Tin (Sn)

*

This package is Pb-free. The Pb-free JEDEC designator (

can be found on the outer packaging for this package.

)

e3

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.

DS22005A-page 18

MCP73833/4

10-Lead Plastic Dual-Flat No-Lead Package (MF) 3x3x0.9 mm Body (DFN) – Saw Singulated

Note:

For the most current package drawings, please

see the Microchip Packaging Specification located

at http://www.microchip.com/packaging

b

p

E

n

L

K

D

D2

EXPOSED

METAL

PAD

2

1

PIN 1

ID INDEX

AREA

E2

(NOTE 2)

TOP VIEW

BOTTOM VIEW

(NOTE 1)

A

EXPOSED

TIE BAR

(NOTE 3)

A3

A1

Units

INCHES

NOM

MILLIMETERS

NOM

10

*

Dimension Limits

MIN

MAX

MIN

MAX

n

e

Number of Pins

Pitch

10

.020 BSC

0.50 BSC

0.90

Overall Height

Standoff

A

.031

.035

.039

0.80

1.00

0.05

A1

A3

E

.000

.001

.002

0.00

0.02

Lead Thickness

Overall Length

.008 REF.

0.20 REF.

3.00

.112

.082

.112

.051

.008

.012

.008

.118

.094

.118

.065

.010

.016

—

.124

.096

.124

.067

.015

.020

—

2.85

2.08

2.85

1.30

0.18

0.30

0.20

3.15

2.45

3.15

1.70

0.30

0.50

—

(

Note 3

)

Exposed Pad Length

Overall Width

E2

D

2.39

3.00

(

Note 3

)

Exposed Pad Width

Lead Width

D2

b

1.65

0.25

Contact Length §

Contact-to-Exposed Pad §

L

0.40

K

—

*

§

Controlling Parameter

Significant Characteristic

Notes:

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. Exposed pad varies according to die attach paddle size.

3. Package may have one or more exposed tie bars at ends.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

See ASME Y14.5M

REF: Reference Dimension, usually without tolerance, for information purposes only.

See ASME Y14.5M

JEDEC equivalent: Not Registered

Drawing No. C04-063

Revised 09-12-05

DS22005A-page 19

MCP73833/4

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

Note:

For the most current package drawings, please

see the Microchip Packaging Specification located

at http://www.microchip.com/packaging

E

E1

p

D

2

1

n

B

c

α

φ

A2

A

A1

L

β

(F)

Units

Dimension Limits

INCHES

NOM

MILLIMETERS

*

MIN

MAX

MIN

NOM

MAX

n

p

Number of Pins

Pitch

10

.020 BSC

.033

0.50 BSC

Overall Height

A

A2

A1

E

.043

–

0.75

0.00

–

1.10

0.95

0.15

Molded Package Thickness

Standoff

.030

.000

.037

.006

0.85

Overall Width

.193 BSC

.118 BSC

4.90 BSC

Molded Package Width

Overall Length

Foot Length

E1

D

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

.009

–

0.23

–

α

Mold Draft Angle Top

Mold Draft Angle Bott om

β

5°

–

15°

5°

–

15°

*

Controlling Parameter

Notes:

Dimensions D and E1 donot include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" (0.254 mm) per side.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

See ASME Y14.5M

REF: Reference Dimnesion, usually witho ut tolerance, for information purposes only.

See ASME Y14.5M

JEDEC Equivalent: MO-187 BA

Drawing No. C04-021

Revised 09-16-05

DS22005A-page 20

MCP73833/4

APPENDIX A: REVISION HISTORY

Revision A (September 2006)

• Original Release of this Document.

DS22005A-page 23

MCP73833/4

NOTES:

DS22005A-page 24

MCP73833/4

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.

Device

XX

X/

XX

a)

b)

c)

d)

e)

f)

MCP73833-AMI/UN: 10-lead MSOP pkg.

Output Temp. Package

Options*

MCP73833-BZI/UN: 10-lead MSOP pkg.

MCP73833-CNI/MF: 10-lead DFN pkg.

MCP73833-FCI/UN: 10-lead MSOP pkg.

MCP73833-GPI/UN: 10-lead MSOP pkg.

MCP73833-NVI/MF: 10-lead DFN pkg.

Device:

MCP73833: 1A Fully Integrated Charger,

PG function on pin 7

MCP73833T: 1A Fully Integrated Charger,

PG function on pin 7

a)

b)

c)

d)

MCP73834-CNI/MF: 10-lead DFN pkg.

MCP73834-FCI/UN: 10-lead MSOP pkg.

MCP73834-GPI/UN: 10-lead MSOP pkg.

MCP73834-NVI/MF: 10-lead DFN pkg.

(Tape and Reel)

MCP73834: 1A Fully Integrated Charger,

TE function on pin 7

MCP73834T: 1A Fully Integrated Charger,

TE function on pin 7

(Tape and Reel)

* * Consult Factory for Alternative Device Options

Output Options * *

* Refer to table below for different operational options.

* * Consult Factory for Alternative Device Options.

Temperature:

I

=

-40°C to +85°C

Package Type:

MF

UN

=

Plastic Dual Flat No Lead (DFN)

(3x3x0.9 mm Body), 10-lead

Plastic Micro Small Outline Package (MSOP),

10-lead

Part Number

V_REG

I_PREG/I_REG

V_PTH/V_REG

I_TERM/I_REG

V_RTH/V_REG

Timer Period

MCP73833-AMI/MF

MCP73833-BZI/MF

MCP73833-CNI/MF

MCP73833-FCI/MF

MCP73833-GPI/MF

MCP73833-NVI/MF

4.20V

4.35V

10%

100%

10%

71.5%

N/A

7.5%

20%

96.5%

94%

0 hours

4 hours

6 hours

71.5%

N/A

10%

7.5%

96.5%

100%

10%

71.5%

MCP73833-AMI/UN

MCP73833-FCI/UN

4.20V

10%

71.5%

7.5%

96.5%

0 hours

6 hours

MCP73834-BZI/MF

MCP73834-CNI/MF

MCP73834-FCI/MF

MCP73834-NVI/MF

4.20V

4.35V

100%

10%

N/A

7.5%

20%

96.5%

94%

0 hours

4 hours

6 hours

71.5%

7.5%

96.5%

MCP73834-FCI/UN

4.20V

10%

71.5%

7.5%

96.5%

6 hours

DS22005A-page 25

MCP73833/4

NOTES:

DS22005A-page 26

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 provided only for your convenience

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

ensure that your application meets with your specifications.

MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR

IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION,

INCLUDING BUT NOT LIMITED TO ITS CONDITION,

QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

devices in life support and/or safety applications is entirely at

the buyer’s risk, and the buyer agrees to defend, indemnify and

hold harmless Microchip from any and all damages, claims,

suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

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

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

PRO MATE, PowerSmart, rfPIC, and SmartShunt are

registered trademarks of Microchip Technology Incorporated

in the U.S.A. and other countries.

AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,

SEEVAL, SmartSensor and The Embedded Control Solutions

Company are registered trademarks of Microchip Technology

Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard,

dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,

ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,

In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active

Thermistor, Mindi, MiWi, MPASM, MPLIB, MPLINK, PICkit,

PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,

PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,

rfPICDEM, Select Mode, Smart Serial, SmartTel, Total

Endurance, UNI/O, WiperLock and ZENA are trademarks of

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

countries.

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 certification for its worldwide

headquarters, design and wafer fabrication facilities in Chandler and

Tempe, Arizona, Gresham, Oregon and Mountain View, California. 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.

DS22005A-page 27

WORLDWIDE SALES AND SERVICE

AMERICAS

ASIA/PACIFIC

EUROPE

Corporate Office

Asia Pacific Office

Suites 3707-14, 37th Floor

Tower 6, The Gateway

Habour City, Kowloon

Hong Kong

Tel: 852-2401-1200

Fax: 852-2401-3431

India - Bangalore

Tel: 91-80-4182-8400

Fax: 91-80-4182-8422

Austria - Wels

Tel: 43-7242-2244-3910

Fax: 43-7242-2244-393

2355 West Chandler Blvd.

Chandler, AZ 85224-6199

Tel: 480-792-7200

Fax: 480-792-7277

Technical Support:

http://support.microchip.com

Web Address:

www.microchip.com

Denmark - Copenhagen

Tel: 45-4450-2828

Fax: 45-4485-2829

India - New Delhi

Tel: 91-11-4160-8631

Fax: 91-11-4160-8632

France - Paris

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

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

India - Pune

Tel: 91-20-2566-1512

Fax: 91-20-2566-1513

Australia - Sydney

Tel: 61-2-9868-6733

Fax: 61-2-9868-6755

Atlanta

Germany - Munich

Tel: 49-89-627-144-0

Fax: 49-89-627-144-44

Japan - Yokohama

Tel: 81-45-471- 6166

Fax: 81-45-471-6122

Alpharetta, GA

Tel: 770-640-0034

Fax: 770-640-0307

China - Beijing

Tel: 86-10-8528-2100

Fax: 86-10-8528-2104

Italy - Milan

Tel: 39-0331-742611

Fax: 39-0331-466781

Korea - Gumi

Tel: 82-54-473-4301

Fax: 82-54-473-4302

Boston

China - Chengdu

Tel: 86-28-8665-5511

Fax: 86-28-8665-7889

Westborough, MA

Tel: 774-760-0087

Fax: 774-760-0088

Netherlands - Drunen

Tel: 31-416-690399

Fax: 31-416-690340

Korea - Seoul

China - Fuzhou

Tel: 86-591-8750-3506

Fax: 86-591-8750-3521

Tel: 82-2-554-7200

Fax: 82-2-558-5932 or

82-2-558-5934

Chicago

Itasca, IL

Tel: 630-285-0071

Fax: 630-285-0075

Spain - Madrid

Tel: 34-91-708-08-90

Fax: 34-91-708-08-91

China - Hong Kong SAR

Tel: 852-2401-1200

Fax: 852-2401-3431

Malaysia - Penang

Tel: 60-4-646-8870

Fax: 60-4-646-5086

Dallas

Addison, TX

Tel: 972-818-7423

Fax: 972-818-2924

UK - Wokingham

Tel: 44-118-921-5869

Fax: 44-118-921-5820

China - Qingdao

Tel: 86-532-8502-7355

Fax: 86-532-8502-7205

Philippines - Manila

Tel: 63-2-634-9065

Fax: 63-2-634-9069

Detroit

Farmington Hills, MI

Tel: 248-538-2250

Fax: 248-538-2260

China - Shanghai

Tel: 86-21-5407-5533

Fax: 86-21-5407-5066

Singapore

Tel: 65-6334-8870

Fax: 65-6334-8850

Kokomo

Kokomo, IN

Tel: 765-864-8360

Fax: 765-864-8387

China - Shenyang

Tel: 86-24-2334-2829

Fax: 86-24-2334-2393

Taiwan - Hsin Chu

Tel: 886-3-572-9526

Fax: 886-3-572-6459

China - Shenzhen

Tel: 86-755-8203-2660

Fax: 86-755-8203-1760

Taiwan - Kaohsiung

Tel: 886-7-536-4818

Fax: 886-7-536-4803

Los Angeles

Mission Viejo, CA

Tel: 949-462-9523

Fax: 949-462-9608

China - Shunde

Tel: 86-757-2839-5507

Fax: 86-757-2839-5571

Taiwan - Taipei

Tel: 886-2-2500-6610

Fax: 886-2-2508-0102

Santa Clara

Santa Clara, CA

Tel: 408-961-6444

Fax: 408-961-6445

China - Wuhan

Tel: 86-27-5980-5300

Fax: 86-27-5980-5118

Thailand - Bangkok

Tel: 66-2-694-1351

Fax: 66-2-694-1350

Toronto

Mississauga, Ontario,

Canada

Tel: 905-673-0699

Fax: 905-673-6509

China - Xian

Tel: 86-29-8833-7250

Fax: 86-29-8833-7256

08/29/06

DS22005A-page 28


型号：	MCP73834T
厂家：	MICROCHIP
描述：	Stand-Alone Linear Li-Ion / Li-Polymer Charge Management Controller
文件：	总26页 (文件大小：1456K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MCP73834T [MICROCHIP]

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