LTM8061
32V, 2A µModule Li-Ion/
Polymer Battery Charger
FeaTures
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DescripTion
The
LTM
®
8061
is a high efficiency 32V, 2A µModule
®
standalone Li-Ion battery charger. It is optimized for
one and two-cell packs, with fixed float voltage options:
4.1V, 4.2V, 8.2V and 8.4V. The LTM8061 provides a
constant-current/constant-voltage charge characteristic,
with maximum charge current up to 2A. A precondition
feature trickle charges a depleted battery, and bad battery
detection provides a signal and suspends charging if a
battery does not respond to preconditioning.
The LTM8061 can be configured to terminate charging
when charge current falls to one-tenth the programmed
maximum current or to use an internal timer if a time-
based termination scheme is desired. Once charging is
terminated, the LTM8061 enters a low current standby
mode. An auto-restart feature starts a new charge cycle
if the battery voltage drops 2.5% from the float voltage,
or if a new battery is inserted into a charging system.
The LTM8061 is packaged in a thermally enhanced, com-
pact (9mm
×
15mm
×
4.32mm) over-molded land grid
array (LGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8061 is
RoHS compliant.
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Wide Input Voltage Range: 4.95V to 32V
(40V Absolute Maximum)
Float Voltage Options:
1-Cell: 4.1V, 4.2V
2-Cell: 8.2V, 8.4V
Programmable Charge Current: Up to 2A
User-Selectable Charge Termination: C/10 or
Onboard Termination Timer
Dynamic Charge Rate Programming/Soft-Start Pin
Programmable Input Current Limit
Optional Reverse Input Protection
NTC Resistor Temperature Monitor
0.5% Float Voltage Accuracy
Bad-Battery Detection with Auto-Reset
Tiny, Low Profile (9mm
×
15mm
×
4.32mm) Surface
Mount LGA Package
applicaTions
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Industrial Handheld Instruments
12V to 24V Automotive and Heavy Equipment
Professional Video/Camera Chargers
L,
LT, LTC, LTM, Linear Technology, Linear logo, µModule and PolyPhase are registered
trademarks and PowerPath is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners
Typical applicaTion
Standalone Single Cell 2A Li-Ion Battery Charger
with C/10 Termination from 6V to 32V Input
V
IN
6V TO 32V
LTM8061-4.1
V
INC
/CLP
V
IN
RUN
4.7µF
RNG/SS
TMR
NTC
GND
8061 TA01a
Battery Charging Profile
2500
NORMAL CHARGING
BIAS
+
SINGLE
CELL
4.1V
BATTERY
CHARGING CURRENT (mA)
V
INA
BAT
2000
1500
CHRG
FAULT
AVAILABLE OPTIONS:
1-CELL: 4.1V, 4.2V
2-CELL: 8.2V, 8.4V
1000
500
PRECONDITION
TERMINATION
0
1
3
2
BATTERY VOLTAGE (V)
4
8061 TA01b
0
8061fa
For more information
www.linear.com/LTM8601
1
LTM8061
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
1
A
B
C
D
E
F
G
H
J
K
L
V
IN
BANK 5
V
INC
/CLP V
INA
BANK 4
BANK 3
BANK 1
GND
BIAS
RNG/SS
FAULT
CHRG
NTC
TMR
RUN
BANK 2
BAT
2
3
4
5
6
7
V
INA
, V
INC/CLP
, V
IN
....................................................40V
RUN,
CHRG, FAULT
...................................V
IN
+ 0.5, 40V
TMR, RNG/SS, NTC .................................................2.5V
BIAS, BAT..................................................................10V
Internal Operating Temperature
(Note 2)................................................................. 125°C
Maximum Body Solder Temperature ..................... 245°C
LGA PACKAGE
77-LEAD (15mm
×
9mm
×
4.32mm)
T
JMAX
= 125°C,
θ
JA
= 17.0°C/W,
θ
JCtop
= 16.2°C/W,
θ
JCbottom
= 6.1°C/W,
θ
JB
= 11.2°C/W,
θ
values determined per JEDEC 51-9, 51-12
Weight = 1.7g
orDer inForMaTion
LEAD FREE FINISH
LTM8061EV-4.1#PBF
LTM8061IV-4.1#PBF
LTM8061EV-4.2#PBF
LTM8061IV-4.2#PBF
LTM8061EV-8.2#PBF
LTM8061IV-8.2#PBF
LTM8061EV-8.4#PBF
LTM8061IV-8.4#PBF
TRAY
LTM8061EV-4.1#PBF
LTM8061IV-4.1#PBF
LTM8061EV-4.2#PBF
LTM8061IV-4.2#PBF
LTM8061EV-8.2#PBF
LTM8061IV-8.2#PBF
LTM8061EV-8.4#PBF
LTM8061IV-8.4#PBF
PART MARKING*
LTM8061V-41
LTM8061V-41
LTM8061V-42
LTM8061V-42
LTM8061V-82
LTM8061V-82
LTM8061V-84
LTM8061V-84
PACKAGE DESCRIPTION
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
77-Lead (15mm
×
9mm
×
4.32mm)
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping
container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to:
http://www.linear.com/packaging/
8061fa
2
For more information
www.linear.com/LTM8601
LTM8061
elecTrical characTerisTics
PARAMETER
V
IN
Operating Voltage
V
IN
Start Voltage
V
IN
OVLO Threshold
V
IN
OVLO Hysteresis
V
IN
UVLO Threshold
V
IN
UVLO Hysteresis
V
INA
to V
INC
/CLP Diode Forward Voltage Drop
BAT Float Voltage
V
INA
Current = 2A
LTM8061-4.1
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. RUN = 2V.
CONDITIONS
LTM8061-4.1/LTM8061-4.2
LTM8061-8.2/LTM8061-8.4
V
IN
Rising
LTM8061-4.1/LTM8061-4.2
LTM8061-8.2/LTM8061-8.4, V
IN
Rising
l
l
MIN
TYP
MAX
32
7.5
11.5
UNITS
V
V
V
V
V
V
V
V
V
32
35
1
4.6
8.7
0.3
0.55
40
LTM8061-4.2
l
LTM8061-8.2
l
LTM8061-8.4
l
4.08
4.06
4.18
4.16
8.16
8.12
8.36
8.32
1.70
4.1
4.2
8.2
8.4
4.12
4.14
4.22
4.24
8.24
8.28
8.44
8.48
2.0
V
V
V
V
V
V
V
V
A
mV
mV
V
V
V
mV
µA
µA
Maximum BAT Charge Current
BAT Recharge Threshold Voltage
(Note 3)
LTM8061-4.1/LTM8061-4.2,
Relative to BAT Float Voltage
LTM8061-8.2/LTM8061-8.4,
Relative to BAT Float Voltage
LTM8061-4.1/LTM8061-4.2
LTM8061-8.2
LTM8061-8.4
Standby Mode, Not Switching
RUN = 0.4V
–100
–200
2.9
5.65
5.80
90
85
15
2.9
50
200
BAT Precondition Threshold Voltage
BAT Precondition Threshold Hysteresis Voltage
Input Supply Current
Minimum BIAS Voltage for Proper Operation
V
INC
/CLP Threshold Voltage
V
INC
/CLP Input Bias Current
NTC Range Limit Voltage (High)
NTC Range Limit Voltage (Low)
NTC Threshold Hysteresis
NTC Disable Impedance
NTC Bias Current
RNG/SS Bias Current
Current Charge Programming: V
RNG/SS
/BAT Current
RUN Threshold Voltage
RUN Hysteresis Voltage
RUN Input Bias Current
CHRG, FAULT
Output Low Voltage
TMR Charge/Discharge Current
TMR Disable Threshold Voltage
C/10 Termination Current
Operating Frequency
RNG/SS Open
0.9
0.1
10mA Load on
CHRG, FAULT
Pins
V
RUN
Rising
V
NTC
Rising
V
NTC
Falling
For Both High and Low Range Limits
(Note 4)
V
NTC
= 0.8V
250
47.5
45
0.42
1.15
1.25
0.265
V
mV
nA
1.36
0.29
20
500
50
50
0.50
1.20
120
1
1.45
0.315
V
V
%
kΩ
52.5
55
0.58
1.25
µA
µA
V/A
V
mV
µA
0.4
25
0.25
200
1
1.1
V
µA
V
mA
MHz
8061fa
For more information
www.linear.com/LTM8601
3
LTM8061
elecTrical characTerisTics
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTM8061E is guaranteed to meet performance specifications
from 0°C to 125°C. Specifications over the –40°C to 125°C internal
temperature range are assured by design, characterization and correlation
with statistical process controls. LTM8061I is guaranteed to meet
specifications over the full –40°C to 125°C internal operating temperature
range. Note that the maximum internal temperature is determined by
specific operating conditions in conjunction with board layout, the rated
package thermal resistance and other environmental factors.
Note 3:
The maximum BAT charge current is reduced by thermal foldback.
See the Typical Performance Characteristics section for details.
Note 4:
Guaranteed by design and correlation.
Typical perForMance characTerisTics
90
85
EFFICIENCY (%)
80
V
INA
= 24V
75
70
65
60
Efficiency vs I
BAT
, 4.1V
BAT
85
V
INA
= 12V
Efficiency vs I
BAT
, 4.2V
BAT
V
INA
= 12V
80
EFFICIENCY (%)
EFFICIENCY (%)
V
INA
= 24V
75
95
90
85
80
75
70
Efficiency vs I
BAT
, 8.2V
BAT
V
INA
= 12V
V
INA
= 24V
70
65
65
60
0
500
1000
I
BAT
(mA)
1500
2000
8061 G01
60
0
500
1000
I
BAT
(mA)
1500
2000
8061 G02
0
500
1000
I
BAT
(mA)
1500
2000
8061 G03
Efficiency vs I
BAT
, 8.4V
BAT
89
87
85
EFFICIENCY (%)
83
81
79
77
75
V
INA
= 24V
INPUT CURRENT (mA)
900
800
700
V
INA
= 12V
600
500
400
300
200
100
0
500
1000
I
BAT
(mA)
1500
2000
8061 G04
Input Current vs I
BAT
, 4.1V
BAT
900
800
INPUT CURRENT (mA)
V
INA
= 12V
700
600
500
400
300
200
100
0
500
1000
I
BAT
(mA)
1500
2000
8061 G05
Input Current vs I
BAT
, 4.2V
BAT
V
INA
= 12V
V
INA
= 24V
V
INA
= 24V
0
0
0
500
1000
I
BAT
(mA)
1500
2000
8061 G06
8061fa
4
For more information
www.linear.com/LTM8601
LTM8061
Typical perForMance characTerisTics
1600
1400
INPUT CURRENT (mA)
V
INA
= 12V
INPUT CURRENT (mA)
1200
1000
800
600
400
200
0
0
500
V
INA
= 24V
Input Current vs I
BAT
, 8.2V
BAT
1600
1400
1200
1000
800
600
400
200
2000
8061 G07
Input Current vs I
BAT
, 8.4V
BAT
V
INA
= 12V
25
I
BIAS
vs I
BAT
, 4.1V
BAT
20
V
INA
= 12V
I
BIAS
(mA)
15
10
V
INA
= 24V
5
V
INA
= 24V
1000
I
BAT
(mA)
1500
0
0
500
1000
I
BAT
(mA)
1500
2000
8061 G08
0
0
500
1000
I
BAT
(mA)
1500
2000
8061 G09
I
BIAS
vs I
BAT
, 4.2V
BAT
30
25
V
INA
= 12V
20
I
BIAS
(mA)
I
BIAS
(mA)
15
10
V
INA
= 24V
5
0
50
45
40
35
30
25
20
15
10
5
0
500
1000
I
BAT
(mA)
1500
2000
8061 G10
I
BIAS
vs I
BAT
, 8.2V
BAT
60
50
V
INA
= 12V
40
I
BIAS
(mA)
30
20
V
INA
= 24V
10
0
I
BIAS
vs I
BAT
, 8.4V
BAT
V
INA
= 12V
V
INA
= 24V
0
0
500
1000
I
BAT
(mA)
1500
2000
8061 G11
0
500
1000
I
BAT
(mA)
1500
2000
8061 G12
1.2
1.0
RNG/SS vs Maximum I
BAT
80
70
QUIESCENT CURRENT (µA)
60
50
40
30
20
10
0
500
1500
1000
BAT CURRENT (mA)
2000
8061 G13
Quiescent Current vs V
INA
,
RUN = 0V
6
INPUT STANDBY CURRENT (mA)
5
4
3
2
1
Input Standby Current
vs Temperature, 4.1V
BAT
V
INA
= 12V
V
INA
= 24V
RNG/SS VOLTAGE (V)
0.8
0.6
0.4
0.2
0
0
0
10
20
V
INA
(V)
30
40
8061 G14
0
–50
0
50
TEMPERATURE (°C)
100
8061 G15
8061fa
For more information
www.linear.com/LTM8601
5
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