MCP73841/2/3/4
Advanced Single or Dual Cell Lithium-Ion/
Lithium-Polymer Charge Management Controllers
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: -40°C to 85°C
• Packaging: MSOP-10 - MCP73841, MCP73842
MSOP-8 - MCP73843, MCP73844
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 -40°C to +85°C.
Applications
•
•
•
•
•
•
•
Lithium-Ion/Lithium-Polymer Battery Chargers
Personal Data Assistants
Cellular Telephones
Hand-Held Instruments
Cradle Chargers
Digital Cameras
MP3 Players
Package Types
10-Pin MSOP
SENSE
V
DD
STAT1
EN
THREF
1
2
3
4
5
10
9
8
7
6
DRV
V
BAT
V
SS
TIMER
THERM
Typical Application Circuit
1A Lithium-Ion Battery Charger
MA2Q705
5V
10 µF
2
3
4
100 kΩ
100 mΩ
1
NDS8434
+
-
7
10 µF
Single
Lithium-Ion
Cell
8
SENSE DRV
V
DD
STAT1
EN
V
BAT
8-Pin MSOP
SENSE
V
DD
STAT1
EN
1
2
3
4
MCP73843
MCP73844
MCP73841
MCP73842
V
SS
6
5
TIMER
0.1 µF
MCP73843
8
7
6
5
DRV
V
BAT
V
SS
TIMER
2004 Microchip Technology Inc.
DS21823C-page 1
MCP73841/2/3/4
Functional Block Diagram
V
DD
V
DD
SENSE
1 kΩ
–
+
Charge
Current
Amplifier
12 kΩ
V
REF
90 kΩ
Charge
Termination
Comparator
+
-
10 kΩ
V
REF
90 kΩ
Charge Current
Control Amplifier
+
–
Voltage Control
Amplifier
+
-
V
REF
300 kΩ
(825 kΩ)
V
BAT
Precondition
Comp. +
-
DRV
I
REG
/10
UVLO
Comparator
Precondition
Control
Charge_ok
Precon
10 kΩ
+
-
74.21 kΩ
Constant-Voltage/
Recharge Comp.
+
-
V
UVLO
0.79 kΩ
EN
Power-On
Delay
V
REF
150.02 kΩ
Bias and
Reference
Generator
V
UVLO
V
REF
(1.2V)
5.15 kΩ
(4.29 kΩ)
THREF
100 kΩ
THERM
50 kΩ
+
-
50 kΩ
TIMER
MCP73841 and MCP73842 Only
Charge_ok
I
REG
/10
Oscillator
+
-
Temperature
Comparators
Drv Stat 1
Charge Control,
Charge Timers,
And
Status Logic
V
SS
STAT1
DS21823C-page 2
2004 Microchip Technology Inc.
MCP73841/2/3/4
1.0
ELECTRICAL
CHARACTERISTICS
*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.
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
I
SS
V
DD
4.5
8.7
–
–
–
–
0.25
0.75
12
12
4
4
V
V
µA
mA
Disabled
Operating
V
DD
=V
REG
(Typ)+1V
V
DD
Low-to-High
V
DD
Low-to-High
V
DD
High-to-Low
V
DD
High-to-Low
Sym
Min
Typ
Max
Units
Conditions
UVLO Start Threshold
MCP73841, MCP73843
MCP73842, MCP73844
UVLO Stop Threshold
MCP73841, MCP73843
MCP73842, MCP73844
V
START
4.25
8.45
V
STOP
4.20
8.40
V
REG
4.079
4.179
8.159
8.358
|(∆V
BAT
/
V
BAT
)|/∆V
DD
|∆V
BAT
|/V
BAT
PSRR
–
–
–
–
–
4.1
4.2
8.2
8.4
0.025
0.01
-58
-42
-30
0.4
4.121
4.221
8.241
8.442
0.25
0.25
–
–
–
1
V
V
V
V
%/V
%
dB
dB
dB
µA
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
V
DD
= [V
REG
(Typ)+1V] to 12V,
I
OUT
= 10 mA
I
OUT
= 10 mA to 150 mA,
V
DD
= [V
REG
(Typ)+1V]
I
OUT
= 10 mA, 100 Hz
I
OUT
= 10 mA, 1 kHz
I
OUT
= 10 mA, 10 kHz
V
DD
Floating, V
BAT
= V
REG
(Typ)
4.40
8.60
4.55
8.85
V
V
4.45
8.65
4.60
8.90
V
V
Voltage Regulation (Constant-Voltage Mode)
Regulated Output Voltage
MCP73841-4.1,
MCP73843-4.1
MCP73841-4.2,
MCP73843-4.2
MCP73842-8.2,
MCP73844-8.2
MCP73842-8.4,
MCP73844-8.4
Line Regulation
Load Regulation
Supply Ripple Attenuation
Output Reverse Leakage
Current
Fast Charge Current
Regulation Threshold
I
DISCHARGE
–
Current Regulation (Fast Charge Constant-Current Mode)
V
FCS
100
110
120
mV
V
DD
– V
SENSE,
T
A
= -5°C to +55°C
2004 Microchip Technology Inc.
DS21823C-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
MCP73841-4.1,
MCP73843-4.1
MCP73841-4.2,
MCP73843-4.2
MCP73842-8.2,
MCP73844-8.2
MCP73842-8.4,
MCP73844-8.4
Charge Termination
Charge Termination Threshold
Automatic Recharge
Recharge Threshold Voltage
MCP73841,
MCP73843
MCP73842,
MCP73844
External MOSFET Gate Drive
Gate Drive Current
Gate Drive Minimum Voltage
Gate - Source Clamp Voltage
Thermistor Reference Output
Voltage
Temperature Coefficient
Thermistor Reference Source
Current
Thermistor Reference Line
Regulation
Thermistor Reference Load
Regulation
Upper Trip Threshold
Upper Trip Point Hysteresis
Lower Trip Threshold
Lower Trip Point Hysteresis
Input Bias Current
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
I
DRV
V
DRVMIN
V
GS
V
THREF
TC
THREF
I
THREF
|(∆V
THREF
/
V
THREF
)|/
∆V
DD
∆V
THREF
/
V
THREF
V
T1
V
T1HYS
V
T2
V
T2HYS
|I
BIAS
|
–
–
–
-7.0
2.475
–
200
–
2
-0.5
–
–
2.55
+50
–
0.1
–
–
1.0
-4.5
2.625
–
–
0.25
mA
mA
V
V
V
ppm/°C
µA
%/V
V
DD
=[V
REG
(Typ)+1V] to 12V
Sink, CV Mode
Source, CV Mode
V
DD
= 4.5V
V
DD
= 12.0V
T
A
= +25°C, V
DD
= V
REG
(Typ)+1V,
I
THREF
= 0 mA
V
RTH
V
REG
-
V
REG
-
V
REG
-
300 mV 200 mV 100 mV
V
REG
-
V
REG
-
V
REG
-
600 mV 400 mV 200 mV
V
V
V
BAT
High-to-Low
V
BAT
High-to-Low
V
TCS
4
7
10
mV
V
DD
– V
SENSE,
T
A
= -5°C to +55°C
V
PCS
V
PTH
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
V
V
V
BAT
Low-to-High
V
BAT
Low-to-High
V
BAT
Low-to-High
V
BAT
Low-to-High
5
10
15
mV
V
DD
– V
SENSE,
T
A
= -5°C to +55°C
Thermistor Reference - MCP73841, MCP73842
–
0.01
0.10
%
I
THREF
= 0 mA to 0.20 mA
Thermistor Comparator - MCP73841, MCP73842
1.18
–
0.59
–
–
1.25
-50
0.62
80
–
1.32
–
0.66
–
2
V
mV
V
mV
µA
DS21823C-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
Input High-Voltage Level
Input Low-Voltage Level
Input Leakage Current
V
IH
V
IL
I
LK
1.4
–
–
-
-
0.01
–
0.8
1
V
V
µA
V
ENABLE
= 12V
Sym
Min
Typ
Max
Units
Conditions
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
Current Regulation
Transition Time Out of
Preconditioning
Current Rise Time Out of
Preconditioning
Fast Charge Safety Timer Period
Preconditioning Current Regulation
Preconditioning Charge Safety
Timer Period
Charge Termination
Elapsed Time Termination Period
Status Indicators
Status Output turn-off
Status Output turn-on
t
OFF
t
ON
–
–
–
–
200
200
µsec
µsec
I
SINK
= 10 mA to 0 mA
I
SINK
= 0 mA to 10 mA
t
TERM
2.2
3.0
3.8
Hours
C
TIMER
= 0.1 µF
t
PRECON
45
60
75
Minutes
C
TIMER
= 0.1 µF
t
DELAY
t
RISE
t
FAST
–
–
1.1
–
–
1.5
1
1
1.9
msec
msec
Hours
V
BAT
< V
PTH
to V
BAT
> V
PTH
I
OUT
Rising to 90% of I
REG
C
TIMER
= 0.1 µF
Sym
t
START
Min
–
Typ
–
Max
5
Units
msec
Conditions
V
DD
Low-to-High
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
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
Thermal Resistance, MSOP-10
Thermal Resistance, MSOP-8
θ
JA
θ
JA
113
206
°C/W
°C/W
4-Layer JC51-7 Standard Board,
Natural Convection
Single-Layer SEMI G42-88 Board,
Natural Convection
T
A
T
A
T
A
-40
-40
-65
+85
+125
+150
°C
°C
°C
Sym
Min
Typ
Max
Units
Conditions
2004 Microchip Technology Inc.
DS21823C-page 5
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