MCP73861/2/3/4
Advanced Single or Dual Cell, Fully Integrated Li-Ion /
Li-Polymer Charge Management Controllers
Features
• Linear Charge Management Controllers
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse-Blocking Protection
• High-Accuracy Preset Voltage Regulation: + 0.5%
• Four Selectable Voltage Regulation Options:
- 4.1V, 4.2V –
MCP73861/3
- 8.2V, 8.4V –
MCP73862/4
• Programmable Charge Current: 1.2A Maximum
• Programmable Safety Charge Timers
• Preconditioning of Deeply Depleted Cells
• Automatic End-of-Charge Control
• Optional Continuous Cell Temperature Monitoring
• Charge Status Output for Direct LED Drive
• Fault Output for Direct LED Drive
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging: 16-Pin, 4 x 4 QFN
16-Pin SOIC
Description
The MCP7386X family of devices are highly advanced
linear charge management controllers for use in space-
limited, cost-sensitive applications. The devices com-
bine high-accuracy, constant voltage and current regu-
lation, cell preconditioning, cell temperature monitoring,
advanced safety timers, automatic charge termination,
internal current sensing, reverse-blocking protection,
charge status and fault indication in either a space-
saving 16-pin, 4 x 4 QFN or 16-pin SOIC package. The
MCP7386X provides a complete, fully-functional, stand-
alone charge management solution with a minimum
number of external components.
The MCP73861/3 is intended for applications utilizing
single-cell Lithium-Ion or Lithium-Polymer battery
packs, while the MCP73862/4 is intended for dual
series cell Lithium-Ion or Lithium-Polymer battery
packs. The MCP73861/3 have two selectable voltage-
regulation options available (4.1V and 4.2V), for use
with either coke or graphite anodes and operate with an
input voltage range of 4.5V to 12V. The MCP73862/4
have two selectable voltage-regulation options avail-
able (8.2V and 8.4V), for use with coke or graphite
anodes, and operate with an input voltage range of
8.7V to 12V.
The only difference between the MCP73861/2 and
MCP73863/4, respectively, is the function of the charge
status output (STAT1) when a charge cycle has been
completed. The MCP73861/2 flash the output, while
the MCP73863/4 turn the output off. Refer to
Section 5.2.1
“Charge
Status
Outputs
(STAT1,STAT2)”.
The MCP7386X 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 (PDAs)
Cellular Telephones
Hand-Held Instruments
Cradle Chargers
Digital Cameras
MP3 Players
Package Types
STAT1
STAT2
V
SS2
16-Pin QFN
16-Pin SOIC
STAT2 1
STAT1 2
12 V
BAT3
11 V
BAT2
10 V
BAT1
9 V
SS3
16 EN
15 V
SS2
16
V
SET
1
V
DD1
2
V
DD2
3
V
SS1
4
5
PROG
15
14
EN
13
MCP73861
MCP73862
MCP73863
MCP73864
6
THREF
7
THERM
8
TIMER
V
DD1
4
V
DD2
5
V
SS1
6
PROG 7
THREF 8
MCP73861
MCP73862
MCP73863
MCP73864
V
SET
3
14 V
BAT3
13 V
BAT2
12 V
BAT1
11 V
SS3
10 TIMER
9 THERM
©
2005 Microchip Technology Inc.
DS21893C-page 1
MCP73861/2/3/4
Typical Application
1.2A Lithium-Ion Battery Charger
5V
4.7µF
2, 3
1
14
16
15
5
V
DD
V
SET
EN
V
BAT3
12
10, 11
V
BAT
4.7 µF
THREF 6
7 6.19 kΩ
STAT1 THERM
7.32 kΩ
8
STAT2 TIMER
0.1
µF
V
SS
4, 9, 13
PROG
+
Single
Lithium-Ion
–
Cell
MCP73861/3
Functional Block Diagram
Direction
Control
V
DD1
V
DD2
G = 0.001
4 kΩ
V
REF
1 kΩ
PROG
90
kΩ
Charge Current
Control Amplifier
+
–
11 kΩ
V
REF
110 kΩ
10 kΩ
+
–
V
UVLO
Charge
Termination
Comparator
+
–
10 kΩ
V
DD
V
BAT1
V
BAT2
Voltage Control
Amplifier
+
–
V
REF
Charge_OK
Precon
Precondition
Comp.
+
–
600 kΩ
(1.65 MΩ)
V
BAT3
I
REG
/12
U
VLO
COMPARATOR
Precondition
Control
148.42 kΩ
Constant-Voltage/
Recharge Comp.
–
+
Power-On
Delay
V
REF
300.04 kΩ
V
UVLO
V
REF
(1.2V)
10.3 kΩ
(8.58 kΩ)
Drv Stat 1
I
REG
/12
Oscillator
Charge Control,
Charge Timers
And Status Logic
Drv Stat 2
Charge_OK
1.58 kΩ
Values in ( )
reflect the
MCP73862/4
devices
EN
Bias and
Reference
Generator
V
SET
THREF
100 kΩ
THERM
50 kΩ
+
–
50 kΩ
TIMER
+
–
Temperature
Comparators
V
SS1
V
SS2
V
SS3
STAT1
STAT2
DS21893C-page 2
©
2005 Microchip Technology Inc.
MCP73861/2/3/4
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.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
Absolute Maximum Ratings†
V
DDN
..............................................................................13.5V
V
BATN
, V
SET
, EN, STAT1, STAT2 w.r.t. V
SS
.................................................................-0.3 to (V
DD
+ 0.3)V
PROG, THREF, THERM, TIMER w.r.t. V
SS
..............-0.3 to 6V
Maximum Junction Temperature, T
J
............ Internally Limited
Storage temperature .....................................-65°C to +150°C
ESD protection on all pins:
Human Body Model (1.5 kΩ in series with 100 pF)....≥ 4 kV
Machine Model (200 pF, No series resistance) ...........300V
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.) + 1.0V]
Parameters
Supply Input
Supply Voltage
Supply Current
UVLO Start Threshold
V
DD
I
SS
V
START
4.5
8.7
—
—
4.25
8.45
UVLO Stop Threshold
V
STOP
4.20
8.40
Voltage Regulation (Constant-Voltage Mode)
Regulated Output Voltage
V
REG
4.079
4.179
8.159
8.358
4.1
4.2
8.2
8.4
4.121
4.221
8.241
8.442
V
V
V
V
MCP73861/3,
V
SET
= V
SS
MCP73861/3,
V
SET
= V
DD
MCP73862/4,
V
SET
= V
SS
MCP73862/4,
V
SET
= V
DD
V
DD
= [V
REG
(typ.) + 1V],
I
OUT
= 10 mA
T
A
= -5°C to +55°C
Line Regulation
Load Regulation
Supply Ripple Attenuation
|(ΔV
BAT
/V
BAT
)
| /ΔV
DD
|ΔV
BAT
/V
BAT
|
PSRR
—
—
—
—
—
Output Reverse-Leakage
Current
Fast Charge Current
Regulation
I
DISCHARGE
—
0.025
0.01
60
42
28
0.23
0.25
0.25
—
—
—
1
%/V V
DD
= [V
REG
(typ.)+1V] to 12V
I
OUT
= 10 mA
%
dB
dB
dB
µA
I
OUT
= 10 mA to 150 mA
V
DD
= [V
REG
(typ.)+1V]
I
OUT
= 10 mA, 10 Hz to 1 kHz
I
OUT
= 10 mA, 10 Hz to
10 kHz
I
OUT
= 10 mA, 10 Hz to 1 MHz
V
DD
< V
BAT
= V
REG
(typ.)
—
—
0.17
0.53
4.5
8.8
4.4
8.7
12
12
4
4
4.65
9.05
4.55
8.95
V
V
µA
mA
V
V
V
V
MCP73861/3
MCP73862/4
Disabled
Operating
MCP73861/3
MCP73862/4
V
DD
Low-to-High
MCP73861/3
MCP73862/4
V
DD
High-to-Low
Sym
Min
Typ
Max
Unit
s
Conditions
Current Regulation (Fast Charge Constant-Current Mode)
I
REG
85
1020
425
100
1200
500
115
1380
575
mA
mA
mA
PROG = OPEN
PROG = V
SS
PROG = 1.6 kΩ
T
A
= -5°C to +55°C
©
2005 Microchip Technology Inc.
DS21893C-page 3
MCP73861/2/3/4
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.) + 1.0V]
Parameters
Sym
Min
Typ
Max
Unit
s
Conditions
Preconditioning Current Regulation (Trickle Charge Constant-Current Mode)
Precondition Current
Regulation
I
PREG
5
60
25
Precondition Threshold
Voltage
V
PTH
2.70
2.75
5.40
5.50
Charge Termination
Charge Termination
Current
I
TERM
6
70
32
Automatic Recharge
Recharge Threshold
Voltage
V
RTH
V
REG
-
300 mV
V
REG
-
600 mV
Thermistor Reference
Thermistor Reference
Output Voltage
Thermistor Reference
Source Current
Thermistor Reference Line
Regulation
Thermistor Reference Load
Regulation
Thermistor Comparator
Upper Trip Threshold
Upper Trip Point Hysteresis
Lower Trip Threshold
Lower Trip Point Hysteresis
Input Bias Current
Sink Current
Low Output Voltage
Input Leakage Current
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
V
T1
V
T1HYS
V
T2
V
T2HYS
I
BIAS
I
SINK
V
OL
I
LK
1.18
—
0.59
—
—
4
—
—
1.25
-50
0.62
80
—
8
200
0.01
1.32
—
0.66
—
2
12
400
1
V
mV
V
mV
μA
mA
mV
μA
I
SINK
= 1 mA
I
SINK
= 0 mA, V
STAT1,2
= 12V
V
THREF
2.475
2.55
2.625
V
T
A
= 25°C,
V
DD
= V
REG
(typ.) + 1V,
I
THREF
= 0 mA
V
REG
-
200 mV
V
REG
-
400 mV
V
REG
-100 mV
V
REG
-
200 mV
V
V
MCP73861/3
MCP73862/4
V
BAT
High-to-Low
8.5
90
41
11
120
50
mA
mA
mA
PROG = OPEN
PROG = V
SS
PROG = 1.6 kΩ
T
A
=-5°C to +55°C
10
120
50
2.80
2.85
5.60
5.70
15
180
75
2.90
2.95
5.80
5.90
mA
mA
mA
V
V
V
V
PROG = OPEN
PROG = V
SS
PROG = 1.6 kΩ
T
A
=-5°C to +55°C
MCP73861/3,
V
SET
= V
SS
MCP73861/3,
V
SET
= V
DD
MCP73862/4,
V
SET
= V
SS
MCP73862/4,
V
SET
= V
DD
V
BAT
Low-to-High
I
THREF
|(ΔV
THREF
/V
T
HREF
)|/
ΔV
DD
|ΔV
THREF
/V
T
HREF|
200
—
—
0.1
—
0.25
µA
%/V V
DD
= [V
REG
(typ.) + 1V] to
12V
%
I
THREF
= 0 mA to 0.20 mA
0.01
0.10
Status Indicator – STAT1, STAT2
DS21893C-page 4
©
2005 Microchip Technology Inc.
MCP73861/2/3/4
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.) + 1.0V]
Parameters
Thermal Shutdown
Die Temperature
Die Temperature
Hysteresis
T
SD
T
SDHYS
—
—
155
10
—
—
°C
°C
Sym
Min
Typ
Max
Unit
s
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. Typical values are at +25°C, V
DD
= [V
REG
(typ.) + 1.0V]
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
µs
µs
I
SINK
= 1 mA to 0 mA
I
SINK
= 0 mA to 1 mA
t
TERM
2.2
3
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
ms
ms
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
ms
Conditions
V
DD
Low-to-High
TEMPERATURE SPECIFICATIONS
Electrical Specifications:
Unless otherwise indicated, 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, 16-lead,
4 mm x 4 mm QFN
Thermal Resistance, 16-lead SOIC
θ
JA
θ
JA
—
—
37
74
—
—
°C/W
°C/W
4-Layer JC51-7 Standard Board,
Natural Convection
4-Layer JC51-7 Standard Board,
Natural Convection
T
A
T
J
T
A
-40
-40
-65
—
—
—
+85
+125
+150
°C
°C
°C
Sym
Min
Typ
Max
Units
Conditions
©
2005 Microchip Technology Inc.
DS21893C-page 5
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