2004 Microchip Technology Inc.
DS21823C-page 1
MCP73841/2/3/4
Features
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)
Charge Status Output for Direct LED Drive
Automatic Power-Down when Input Power
Removed
Temperature Range: -40C to 85C
Packaging: MSOP-10 - MCP73841, MCP73842
MSOP-8 - MCP73843, MCP73844
Applications
Lithium-Ion/Lithium-Polymer Battery Chargers
Personal Data Assistants
Cellular Telephones
Hand-Held Instruments
Cradle Chargers
Digital Cameras
MP3 Players
Typical Application Circuit
Description
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.
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.
The MCP7384X family of devices are fully specified
over the ambient temperature range of -40C to +85C.
Package Types
+
-
V
SS
DRV
SENSE
V
DD
V
BAT
STAT1
3
6
7
1
2
MCP73843
8
10 F
10 F
100 k
100 m
5V
Single
Lithium-Ion
Cell
NDS8434
MA2Q705
1A Lithium-Ion Battery Charger
EN
5
TIMER
4
0.1 F
10-Pin MSOP
SENSE
V
DD
STAT1
EN
DRV
V
BAT
V
SS
TIMER
1
2
3
4
8
7
6
5
M
C
P73
843
M
C
P73
844
8-Pin MSOP
V
DD
STAT1
EN
THREF
V
BAT
V
SS
TIMER
THERM
2
3
4
5
9
8
7
6
M
C
P73
841
M
C
P73
842
SENSE
DRV
1
10
Advanced Single or Dual Cell Lithium-Ion/
Lithium-Polymer Charge Management Controllers
MCP73841/2/3/4
DS21823C-page 2
2004 Microchip Technology Inc.
Functional Block Diagram
Charge
Termination
Comparator
Voltage Control
Amplifier
V
REF
I
REG
/10
Precondition
Control
Charge_ok
Precon
V
DD
Charge Current
Control Amplifier
+
V
REF
V
REF
Precondition
Comp.
V
BAT
V
SS
DRV
90 k
90 k
10 k
10 k
+
Charge
Current
Amplifier
V
DD
SENSE
MCP73841 and MCP73842 Only
300 k
(825 k
)
12 k
1 k
UVLO
Comparator
V
UVLO
Temperature
Comparators
Bias and
Reference
Generator
V
UVLO
V
REF
(1.2V)
Power-On
Delay
V
REF
Oscillator
Constant-Voltage/
Recharge Comp.
Charge Control,
Charge Timers,
And
Status Logic
Drv Stat 1
Charge_ok
I
REG
/10
THERM
EN
TIMER
STAT1
THREF
100 k
50 k
50 k
74.21 k
0.79 k
150.02 k
5.15 k
(4.29 k
)
+
-
+
-
+
-
+
-
+
-
+
-
+
-
2004 Microchip Technology Inc.
DS21823C-page 3
MCP73841/2/3/4
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
............................. 150C
Storage temperature .....................................-65C to +150C
ESD protection on all pins:
Human Body Model (1.5 k
in Series with 100 pF)
.......
2 kV
Machine Model (200 pF, No Series Resistance) .............200V
*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.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 12V, T
A
= -40C to +85C.
Typical values are at +25C, V
DD
= [V
REG
(Typ) + 1V].
Parameters
Sym
Min
Typ
Max
Units
Conditions
Supply Input
Supply Voltage
V
DD
MCP73841, MCP73843
4.5
12
V
MCP73842, MCP73844
8.7
12
V
Supply Current
I
SS
0.25
0.75
4
4
A
mA
Disabled
Operating
V
DD
=V
REG
(Typ)+1V
UVLO Start Threshold
V
START
MCP73841, MCP73843
4.25
4.45
4.60
V
V
DD
Low-to-High
MCP73842, MCP73844
8.45
8.65
8.90
V
V
DD
Low-to-High
UVLO Stop Threshold
V
STOP
MCP73841, MCP73843
4.20
4.40
4.55
V
V
DD
High-to-Low
MCP73842, MCP73844
8.40
8.60
8.85
V
V
DD
High-to-Low
Voltage Regulation (Constant-Voltage Mode)
Regulated Output Voltage
V
REG
MCP73841-4.1,
MCP73843-4.1
4.079
4.1
4.121
V
V
DD
= [V
REG
(Typ)+1V], I
OUT
= 10 mA,
T
A
= -5C to +55C
MCP73841-4.2,
MCP73843-4.2
4.179
4.2
4.221
V
V
DD
= [V
REG
(Typ)+1V], I
OUT
= 10 mA,
T
A
= -5C to +55C
MCP73842-8.2,
MCP73844-8.2
8.159
8.2
8.241
V
V
DD
= [V
REG
(Typ)+1V], I
OUT
= 10 mA,
T
A
= -5C to +55C
MCP73842-8.4,
MCP73844-8.4
8.358
8.4
8.442
V
V
DD
= [V
REG
(Typ)+1V], I
OUT
= 10 mA,
T
A
= -5C to +55C
Line Regulation
|(
V
BAT
/
V
BAT
)|/
V
DD
0.025
0.25
%/V
V
DD
= [V
REG
(Typ)+1V] to 12V,
I
OUT
= 10 mA
Load Regulation
|
V
BAT
|/V
BAT
0.01
0.25
%
I
OUT
= 10 mA to 150 mA,
V
DD
= [V
REG
(Typ)+1V]
Supply Ripple Attenuation
PSRR
-58
dB
I
OUT
= 10 mA, 100 Hz
-42
dB
I
OUT
= 10 mA, 1 kHz
-30
dB
I
OUT
= 10 mA, 10 kHz
Output Reverse Leakage
Current
I
DISCHARGE
0.4
1
A
V
DD
Floating, 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
= -5C to +55C
MCP73841/2/3/4
DS21823C-page 4
2004 Microchip Technology Inc.
Preconditioning Current Regulation (Trickle Charge Constant-Current Mode)
Precondition Current
Regulation Threshold
V
PCS
5
10
15
mV
V
DD
V
SENSE,
T
A
= -5C to +55C
Precondition Threshold Voltage
V
PTH
MCP73841-4.1,
MCP73843-4.1
2.70
2.80
2.90
V
V
BAT
Low-to-High
MCP73841-4.2,
MCP73843-4.2
2.75
2.85
2.95
V
V
BAT
Low-to-High
MCP73842-8.2,
MCP73844-8.2
5.40
5.60
5.80
V
V
BAT
Low-to-High
MCP73842-8.4,
MCP73844-8.4
5.50
5.70
5.90
V
V
BAT
Low-to-High
Charge Termination
Charge Termination Threshold
V
TCS
4
7
10
mV
V
DD
V
SENSE,
T
A
= -5C to +55C
Automatic Recharge
Recharge Threshold Voltage
V
RTH
MCP73841,
MCP73843
V
REG
-
300 mV
V
REG
-
200 mV
V
REG
-
100 mV
V
V
BAT
High-to-Low
MCP73842,
MCP73844
V
REG
-
600 mV
V
REG
-
400 mV
V
REG
-
200 mV
V
V
BAT
High-to-Low
External MOSFET Gate Drive
Gate Drive Current
I
DRV
2
mA
Sink, CV Mode
-0.5
mA
Source, CV Mode
Gate Drive Minimum Voltage
V
DRVMIN
1.0
V
V
DD
= 4.5V
Gate - Source Clamp Voltage
V
GS
-7.0
-4.5
V
V
DD
= 12.0V
Thermistor Reference - MCP73841, MCP73842
Thermistor Reference Output
Voltage
V
THREF
2.475
2.55
2.625
V
T
A
= +25C, V
DD
= V
REG
(Typ)+1V,
I
THREF
= 0 mA
Temperature Coefficient
TC
THREF
+50
ppm/C
Thermistor Reference Source
Current
I
THREF
200
A
Thermistor Reference Line
Regulation
|(
V
THREF
/
V
THREF
)|/
V
DD
0.1
0.25
%/V
V
DD
=[V
REG
(Typ)+1V] to 12V
Thermistor Reference Load
Regulation
V
THREF
/
V
THREF
0.01
0.10
%
I
THREF
= 0 mA to 0.20 mA
Thermistor Comparator - MCP73841, MCP73842
Upper Trip Threshold
V
T1
1.18
1.25
1.32
V
Upper Trip Point Hysteresis
V
T1HYS
-50
mV
Lower Trip Threshold
V
T2
0.59
0.62
0.66
V
Lower Trip Point Hysteresis
V
T2HYS
80
mV
Input Bias Current
|I
BIAS
|
2
A
Status Indicator
Sink Current
I
SINK
4
7
12
mA
Low Output Voltage
V
OL
200
400
mV
I
SINK
= 1 mA
Input Leakage Current
I
LK
0.01
1
A
I
SINK
= 0 mA, V
STAT1
= 12V
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 12V, T
A
= -40C to +85C.
Typical values are at +25C, V
DD
= [V
REG
(Typ) + 1V].
Parameters
Sym
Min
Typ
Max
Units
Conditions
2004 Microchip Technology Inc.
DS21823C-page 5
MCP73841/2/3/4
AC CHARACTERISTICS
TEMPERATURE SPECIFICATIONS
Enable Input
Input High-Voltage Level
V
IH
1.4
-
V
Input Low-Voltage Level
V
IL
-
0.8
V
Input Leakage Current
I
LK
0.01
1
A
V
ENABLE
= 12V
Electrical Specifications: Unless otherwise indicated, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 12V, T
A
= -40C to +85C. Typ-
ical values are at +25C, V
DD
= [V
REG
(Typ)+1V].
Parameters
Sym
Min
Typ
Max
Units
Conditions
UVLO Start Delay
t
START
5
msec
V
DD
Low-to-High
Current Regulation
Transition Time Out of
Preconditioning
t
DELAY
1
msec
V
BAT
< V
PTH
to V
BAT
> V
PTH
Current Rise Time Out of
Preconditioning
t
RISE
1
msec
I
OUT
Rising to 90% of I
REG
Fast Charge Safety Timer Period
t
FAST
1.1
1.5
1.9
Hours
C
TIMER
= 0.1 F
Preconditioning Current Regulation
Preconditioning Charge Safety
Timer Period
t
PRECON
45
60
75
Minutes
C
TIMER
= 0.1 F
Charge Termination
Elapsed Time Termination Period
t
TERM
2.2
3.0
3.8
Hours
C
TIMER
= 0.1 F
Status Indicators
Status Output turn-off
t
OFF
200
sec
I
SINK
= 10 mA to 0 mA
Status Output turn-on
t
ON
200
sec
I
SINK
= 0 mA to 10 mA
Electrical Specifications: Unless otherwise specified, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 12V.
Typical values are at +25C, V
DD
= [V
REG
(Typ)+1.0V].
Parameters
Sym
Min
Typ
Max
Units
Conditions
Temperature Ranges
Specified Temperature Range
T
A
-40
+85
C
Operating Temperature Range
T
A
-40
+125
C
Storage Temperature Range
T
A
-65
+150
C
Thermal Package Resistances
Thermal Resistance, MSOP-10
JA
113
C/W
4-Layer JC51-7 Standard Board,
Natural Convection
Thermal Resistance, MSOP-8
JA
206
C/W
Single-Layer SEMI G42-88 Board,
Natural Convection
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 12V, T
A
= -40C to +85C.
Typical values are at +25C, V
DD
= [V
REG
(Typ) + 1V].
Parameters
Sym
Min
Typ
Max
Units
Conditions
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