DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
LTM8061-4.1/LTM8061-4.2/
LTM8061-8.2/LTM8061.4
32V, 2A µModule Li-Ion
Battery Charger
converter on or off. JP2 allows for easy selection of C/10
or timer charge termination. The LTM8061 datasheet must
be read in conjunction with this demo manual for working
on or modifying the demo circuit 1645A.
Design files for this circuit board are available at
http://www.linear.com/demo
L,
LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
DESCRIPTION
Demonstration circuits 1645A-A, 1645A-B, 1645A-C and
1645A-D feature the LTM8061, a 32V, 2A μModule
®
Li-Ion
battery charger. Operating from a 6.5V to 32V input source,
the 1645A-A and 1645A-B demo circuits charge single cell
Li-Ion batteries to float voltages of 4.1V or 4.2V respectively.
The 1645A-C and 1645A-D demo circuits operate from a
12V to 32V input source, and charge dual cell Li-Ion bat-
tery packs to float voltages of 8.2V or 8.4V. JP1 turns the
PERFORMANCE SUMMARY
Table 1. Typical Secifications of the Demoboard (T
A
= 25°C)
Input Supply Range
Typical Output Current Limit for All Versions
Float Voltage Accuracy
6.5V to 32V (-A and -B), 12V to 32V (-C and -D)
2A
4.08V to 4.12V (-A), 4.18V to 4.22V (-B) 8.16V to -8.24V (-C), 8.36V to 8.44V (-D)
BOARD PHOTO
dc1645af
1
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
QUICK START PROCEDURE
Demonstration circuits 1645A-A, 1645A-B, 1645A-C and
1645A-D are easy to set up to evaluate the performance of the
LTM8061-4.1, LTM8061-4.2, LTM8061-8.2, LTM8061-8.4.
Refer to Figure 1 for proper measurement and equipment
setup.
DC1645A-A and DC1645A-B
Follow the procedure below for demo circuits 1645A-A
and 1645A-B
1.
Jumper and Power Supply Setting:
JP1 = ON
2.
PS1 = OFF
JP2 = C/10 PS2 = OFF
Turn on PS2 and slowly increase the voltage to 2.7V
while monitoring the current into the BAT pin. If the
current is less than 5mA, turn on PS1 and increase
voltage to 12V.
Verify that the battery charging current, I
BAT
, is be-
tween 250mA and 350mA. The CHRG LED should be
on and the FAULT LED should be off.
Increase PS2 until V
BAT
is 3.6V. Verify the input cur-
rent, I
IN
, is between 700mA and 850mA, the battery
current, I
BAT
, is between 1.775A and 2.225A and that
the CHRG LED remains on.
Increase PS2 until V
BAT
is 4.3V. Verify the battery
charging current, I
BAT
, is less than 5mA and the
CHRG LED is off.
Decrease PS2 until V
BAT
is 3.9V. Verify the battery
current, I
BAT
, is between 1.775A and 2.225A and the
CHRG LED is on.
Decrease PS2 until V
BAT
is 3.6V. Connect a 10k resistor
from RNG/SS to ground. Verify the charging current,
I
BAT
, is between 850mA and 1.0A. Verify the voltage
at V
RNG/SS
, is between 450mV and 550mV. Remove
the 10k resistor.
Set JP1 to OFF. Verify the charging current, I
BAT
, is
less than 5mA and the FAULT LED and the CHRG LED
are off.
9.
Set JP1 to ON. Connect a jumper from the NTC pin
to ground. Verify the charging current, I
BAT
, is less
than 5mA and the FAULT LED and the CHRG LED are
on.
10. Remove the jumper from NTC to ground. Verify the
charging current, I
BAT
, is between 1.775A and 2.225A,
the FAULT LED is off and the CHRG LED is on.
11. This concludes the test for the A and B versions. Turn
off PS1 and PS2.
DC1645A-C and DC1645A-D
Follow the procedure below for demo circuits -C and -D
1a. Jumper and Power Supply Setting:
JP1 = ON
PS1 = OFF
JP2 = C/10 PS2 = OFF
2a. Turn on PS2 and slowly increase the voltage to 5.4V
while monitoring the current into the BAT pin. If the
current is less than 5mA, turn on PS1 and increase
voltage to 12V.
3a. Verify that the battery charging current, I
BAT
, is be-
tween 250mA and 350mA. The CHRG LED should be
on and the FAULT LED should be off.
4a. Increase PS2 until V
BAT
is 7.2V. Verify the input
current, I
IN
, is between 1200mA and 1700mA, the
battery current, I
BAT
, is between 1.775A and 2.225A
and the CHRG LED remains on.
5a. Increase PS2 until V
BAT
is 8.6V. Verify the battery
charging current, I
BAT
, is less than 5mA and the
CHRG LED is off.
6a. Decrease PS2 until V
BAT
is 7.8V. Verify the battery
current, I
BAT
, is between 1.775A and 2.225A and that
the CHRG LED is on.
7a. Decrease PS2 until V
BAT
is 7.2V. Connect a 10k re-
sistor from RNG/SS to ground. Verify the charging
current, I
BAT
, is between 800mA and 1.0A. Verify the
voltage at V
RNG/SS
, is between 450mV and 550mV.
Remove the 10k resistor.
3.
4.
5.
6.
7.
8.
dc1645af
2
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
QUICK START PROCEDURE
8a. Set JP1 to OFF. Verify the charging current, I
BAT
, is
less than 5mA and the FAULT LED and the CHRG LED
are off.
9a. Set JP1 to ON. Connect a jumper from the NTC pin to
ground. Verify the charging current, I
BAT
, is less than
5mA and the FAULT LED and the CHRG LED are on.
10a. Remove the jumper from NTC to ground. Verify the
charging current, I
BAT
, is between 1.775A and 2.225A,
the FAULT LED is off and the CHRG LED is on.
11a. This concludes the test for the C and D versions.
Turn off PS1 and PS2.
–
–
VM2
+
+
–
POWER
SUPPLY
PS1
+
AM1
–
VM1
+
AM2
–
*
POWER
SUPPLY
PS2
+
+
–
Figure 1. DC1645A Proper Equipment Setup
90
85
EFFICIENCY (%)
80
V
INA
= 24V
75
70
65
100
60
0
500
1000
I
BAT
(mA)
1500
2000
1645A F02
900
V
INA
= 12V
INPUT CURRENT (mA)
800
700
600
500
400
300
200
V
INA
= 24V
V
INA
= 12V
0
0
500
1000
I
BAT
(mA)
1500
2000
1645A F03
Figure 2. Efficiency vs I
BAT
, 4.1V
BAT
Figure 3. Input Current vs I
BAT
, 4.1V
BAT
dc1645af
3
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
QUICK START PROCEDURE
95
90
85
EFFICIENCY (%)
80
75
70
65
60
0
500
1000
I
BAT
(mA)
1500
2000
1645A F04
1600
V
INA
= 12V
INPUT CURRENT (mA)
V
INA
= 24V
1400
1200
V
INA
= 12V
1000
800
600
400
200
0
0
500
1000
I
BAT
(mA)
1500
2000
8061 G07
V
INA
= 24V
Figure 4. Efficiency vs I
BAT
, 8.2V
BAT
Figure 5. Input Current vs I
BAT
, 8.2V
BAT
PARTS LIST
ITEM
1
2
3
4
5
6
QUANTITY
1
1
1
1
1
1
REFERENCE-
DESCRIPTION
C4
C5
C6
R2
R3
U1
DESCRIPTION
CAP 10μF 10% 35V X5R, 1210
,
CAP 0.68μF 10% 10V X5R, 0402
,
CAP 47μF 20% 16V X5R, 1210
,
RES, 0.02Ω 1% 1/2W, 1206
RES, 0.1Ω 1% 1/2W, 1206
IC, 32V, 2A μModule Li Ion Battery Chrager
MANUFACTURERS PART NUMBER
MURATA, GRM32ER7YA106KA12L
MURATA, GRM155R61A684KE15D
TAIYO YUDEN, EMK325BJ476MM-G
IRC, LR1206LF-01-R020-F
IRC, LRC1206-01-R100-F
LTM8061EV-4.1 (-A only)
LTM8061EV-4.2 (-B only)
LTM8061EV-8.2 (-C only)
LTM8061EV-8.4 (-D only)
DEMO CIRCUIT 1645A
MURATA, GRM32ER71H475KA091B OPT
SUNCON, 50CE22BS
PANASONIC, LN1351C
PANASONIC, LN1251C
NIC, NRC12ZOTRF
OPTION
NIC, NRC06F1003TRF
OPTION
NIC, NRC12F5101TRF
MILL MAX, 2501-2-00-80-00-00-07-0
SAMTEC, TMM-103-02-L-S
SAMTEC, 2SN-BK-G
KEYSTONE, 8834
dc1645af
Required Circuit Components
7
1
2
3
4
5
6
7
8
9
1
2
3
4
1
0
1
1
1
3
0
1
0
2
10
2
2
4
C1,C2
C3
D1
D2
R1,R5,R6
R4
R7
R8
R9,R10
E1-E10
JP1, JP2
JP1, JP2
FAB, PRINTED CIRCUIT BOARD
CAP 4.7μF 10% 50V X7R, 1210 OPT.
,
CAP 22μF 20% 50V
,
LED, GREEN
LED, RED
RES, 0Ω JUMPER, 1206
RES, OPT. 1206
RES, 100k 1% 1/10W, 0603
RES, OPT. 0805
RES, 5.1k 1% 1/4W, 1206
TURRET
HEADER, 3-PIN, 2mm
SHUNT, 2mm
STANDOFF SNAP ON
,
Additional Demo Board Circuit Components
Hardware For Demo Board Only
4
REVISION HISTORY
SYSTEM LOAD
E4
2
C4
PRODUCTION
JESUS R.
09/15/10
VIN2
ECO
REV
DESCRIPTION
APPROVED
DATE
E1
R4
OPT
10uF 35V
U1
K4
L4
K3
L3
K1
K2
L1
L2
R1
0.02
R2
VIN
+
C3
22uF
3
OPT
50V
R5
0
0
C1
C2
OPT
LTM8061EV 3
E3
VIN
VIN
VIN
VIN
GND
BAT
VFLOAT 3
E5
IOUT = 2A
C6
47uF
16V
K5
L5
L6
L7
VINA
VINA
VINA
VINA
VINC/CLP
VINC/CLP
VINC/CLP
VINC/CLP
E2
R6
0
GND
RUN
ON
2
1
3
E10
GND
JP1
R3
0.1
SCHEMATIC DIAGRAM
OFF
R7
100k
1%
0603
K6
RUN
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BIAS
A6
B6
C6
D6
E6
F6
A7
B7
C7
D7
E7
F7
G7
E6
H7
RNG/SS
CHRG
K7
E7
RNG/SS
H6
NTC
FAULT
J7
CHRG
E9
R8
OPT
0805
C5 0.68uF
J6
TMR
FAULT
D1 (GRN)
R9
5.1k 1%
D2 (RED)
R10
5.1k 1%
1
2
1
2
VIN2
E8
NTC
0402
TERMINATION
C/10
2
1
3
JP2
TIMER
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
A1
B1
C1
D1
E1
F1
G1
H1
J1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
A5
B5
C5
D5
E5
F5
G5
H5
J5
G6
NOTES: UNLESS OTHERWISE SPECIFIED,
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation
that the interconnection of its circuits as described herein will not infringe on existing patent rights.
VFLOAT
4.1V
A2
B2
C2
D2
E2
F2
G2
H2
J2
A3
B3
C3
D3
E3
F3
G3
H3
J3
A4
B4
C4
D4
E4
F4
G4
H4
J4
1. ALL RESISTORS ARE 1206.
2. ALL CAPACITORS ARE 1210.
3
ASSY
U1 (MODULE)
VIN RANGE
-A
4.2V
8.2V
8.4V
LTM8061EV-4.1
6.5V TO 32V
TECHNOLOGY
-B
LTM8061EV-4.2
6.5V TO 32V
-C
LTM8061EV-8.2
12V TO 32V
32V, 2A
MODULE
R
LI-ION BATTERY CHARGER
-D
LTM8061EV-8.4
12V TO 32V
N/A
LTM8061EV FAMILY
DEMO CIRCUIT 1645A
Monday, October 25, 2010
1
2
1
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
dc1645af
5
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