Linear Technology DC1645A-A Quick setup guide

1
dc1645af
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
DESCRIPTION
LTM8061-4.1/LTM8061-4.2/
LTM8061-8.2/LTM8061.4
32V, 2A µModule Li-Ion
Battery Charger
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 tofloat voltages of4.1V or 4.2Vrespectively.
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 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.
Table 1. Typical Secifications of the Demoboard (TA= 25°C)
Input Supply Range 6.5V to 32V (-A and -B), 12V to 32V (-C and -D)
Typical Output Current Limit for All Versions 2A
Float Voltage Accuracy 4.08V to 4.12V (-A), 4.18V to 4.22V (-B) 8.16V to -8.24V (-C), 8.36V to 8.44V (-D)
PERFORMANCE SUMMARY
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
BOARD PHOTO

2
dc1645af
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
QUICK START PROCEDURE
Demonstration circuits 1645A-A, 1645A-B, 1645A-C and
1645A-D areeasy tosetup toevaluate theperformance ofthe
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 PS1 = OFF
JP2 = C/10 PS2 = OFF
2. 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.
3. Verify that the battery charging current, IBAT, is be-
tween 250mA and 350mA. The CHRG LED should be
on and the FAULT LED should be off.
4. Increase PS2 until VBAT is 3.6V. Verify the input cur-
rent, IIN, is between 700mA and 850mA, the battery
current, IBAT, is between 1.775A and 2.225A and that
the CHRG LED remains on.
5. Increase PS2 until VBAT is 4.3V. Verify the battery
charging current, IBAT, is less than 5mA and the
CHRG LED is off.
6. Decrease PS2 until VBAT is 3.9V. Verify the battery
current, IBAT, is between 1.775A and 2.225A and the
CHRG LED is on.
7. Decrease PS2until VBAT is 3.6V. Connect a 10kresistor
from RNG/SS to ground. Verify the charging current,
IBAT, is between 850mA and 1.0A. Verify the voltage
at VRNG/SS, is between 450mV and 550mV. Remove
the 10k resistor.
8. Set JP1 to OFF. Verify the charging current, IBAT, 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, IBAT, is less
than 5mA and the FAULT LED and the CHRG LED are
on.
10. Remove the jumper from NTC to ground. Verify the
chargingcurrent,IBAT, 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, IBAT, is be-
tween 250mA and 350mA. The CHRG LED should be
on and the FAULT LED should be off.
4a. Increase PS2 until VBAT is 7.2V. Verify the input
current, IIN, is between 1200mA and 1700mA, the
battery current, IBAT, is between 1.775A and 2.225A
and the CHRG LED remains on.
5a. Increase PS2 until VBAT is 8.6V. Verify the battery
charging current, IBAT, is less than 5mA and the
CHRG LED is off.
6a. Decrease PS2 until VBAT is 7.8V. Verify the battery
current, IBAT, is between 1.775A and 2.225A and that
the CHRG LED is on.
7a. Decrease PS2 until VBAT is 7.2V. Connect a 10k re-
sistor from RNG/SS to ground. Verify the charging
current, IBAT, is between 800mA and 1.0A. Verify the
voltage at VRNG/SS, is between 450mV and 550mV.
Remove the 10k resistor.

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dc1645af
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
QUICK START PROCEDURE
IBAT (mA)
0
60
EFFICIENCY (%)
70
75
65
80
1000
90
1645A F02
500 1500 2000
85 VINA = 12V
VINA = 24V
IBAT (mA)
0
0
INPUT CURRENT (mA)
200
300
100
400
500
600
700
800
1000
900
1645A F03
500 1500 2000
VINA = 12V
VINA = 24V
Figure 2. Efficiency vs IBAT, 4.1VBAT Figure 3. Input Current vs IBAT, 4.1VBAT
VM1
+
–
AM1
+–
POWER
SUPPLY
PS1
+
–
VM2
+
–
AM2
+–
POWER
SUPPLY
PS2
+
–
*
Figure 1. DC1645A Proper Equipment Setup
8a. Set JP1 to OFF. Verify the charging current, IBAT, 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, IBAT, is less than
5mA and the FAULT LED and the CHRG LED are on.
10a. Remove the jumper from NTC to ground. Verify the
chargingcurrent,IBAT, is between 1.775A and2.225A,
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.

4
dc1645af
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
PARTS LIST
ITEM QUANTITY
REFERENCE-
DESCRIPTION DESCRIPTION MANUFACTURERS PART NUMBER
Required Circuit Components
1 1 C4 CAP, 10μF 10% 35V X5R, 1210 MURATA, GRM32ER7YA106KA12L
2 1 C5 CAP, 0.68μF 10% 10V X5R, 0402 MURATA, GRM155R61A684KE15D
3 1 C6 CAP, 47μF 20% 16V X5R, 1210 TAIYO YUDEN, EMK325BJ476MM-G
4 1 R2 RES, 0.02Ω 1% 1/2W, 1206 IRC, LR1206LF-01-R020-F
5 1 R3 RES, 0.1Ω 1% 1/2W, 1206 IRC, LRC1206-01-R100-F
6 1 U1 IC, 32V, 2A μModule Li Ion Battery Chrager LTM8061EV-4.1 (-A only)
LTM8061EV-4.2 (-B only)
LTM8061EV-8.2 (-C only)
LTM8061EV-8.4 (-D only)
7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1645A
Additional Demo Board Circuit Components
1 0 C1,C2 CAP, 4.7μF 10% 50V X7R, 1210 OPT. MURATA, GRM32ER71H475KA091B OPT
2 1 C3 CAP, 22μF 20% 50V SUNCON, 50CE22BS
3 1 D1 LED, GREEN PANASONIC, LN1351C
4 1 D2 LED, RED PANASONIC, LN1251C
5 3 R1,R5,R6 RES, 0Ω JUMPER, 1206 NIC, NRC12ZOTRF
6 0 R4 RES, OPT. 1206 OPTION
7 1 R7 RES, 100k 1% 1/10W, 0603 NIC, NRC06F1003TRF
8 0 R8 RES, OPT. 0805 OPTION
9 2 R9,R10 RES, 5.1k 1% 1/4W, 1206 NIC, NRC12F5101TRF
Hardware For Demo Board Only
1 10 E1-E10 TURRET MILL MAX, 2501-2-00-80-00-00-07-0
2 2 JP1, JP2 HEADER, 3-PIN, 2mm SAMTEC, TMM-103-02-L-S
3 2 JP1, JP2 SHUNT, 2mm SAMTEC, 2SN-BK-G
4 4 STANDOFF, SNAP ON KEYSTONE, 8834
QUICK START PROCEDURE
IBAT (mA)
0
60
EFFICIENCY (%)
70
75
65
80
85
90
1000
95
1645A F04
500 1500 2000
VINA = 12V
VINA = 24V
IBAT (mA)
0
0
INPUT CURRENT (mA)
400
600
200
800
1000
1200
1400
1000
1600
8061 G07
500 1500 2000
VINA = 12V
VINA = 24V
Figure 4. Efficiency vs IBAT, 8.2VBAT Figure 5. Input Current vs IBAT, 8.2VBAT

5
dc1645af
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
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.
SCHEMATIC DIAGRAM
3
OFF
3
RUN
0402
3
ON
1
12V TO 32V-D
LTM8061EV-8.2 12V TO 32V LTM8061EV-8.4
3
-A
ASSY U1 (MODULE)
-B
NOTES: UNLESS OTHERWISE SPECIFIED,
VIN RANGE 6.5V TO 32V
1. ALL RESISTORS ARE 1206.
6.5V TO 32V
-C
LTM8061EV-4.1 LTM8061EV-4.2
2. ALL CAPACITORS ARE 1210.
2
0805
0603
TIMER
3
TERMINATION
C/10
1 2
3
IOUT = 2A
T
TT T
R
VFLOAT
8.4V 8.2V
VFLOAT
4.1V 4.2V
VIN2
VIN2
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
JESUS R.
PRODUCTION209/15/10
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
JESUS R.
PRODUCTION209/15/10
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
JESUS R.
PRODUCTION209/15/10
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DEMO CIRCUIT 1645A
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DEMO CIRCUIT 1645A
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DEMO CIRCUIT 1645A
C6
47uF 16V
C6
47uF 16V
C5 0.68uFC5 0.68uF
R8 OPT R8 OPT
R5
0
R5
0
D2 (RED) D2 (RED)
21
U1 LTM8061EV U1 LTM8061EV
GND
A1
GND
A2
GND
A3
GND
A4
GND A5
BAT A6
GND
B1
GND
B2
GND
B3
GND
B4
GND B5
BAT B6
GND
C1
GND
C2
GND
C3
BAT B7 BAT C7
GND
D1
GND
D2
GND
D3
GND
D4
GND D5
BAT D6
GND
E1
GND
E2
GND
E3
GND
E4
GND E5
BAT E6 BAT E7
GND
F1
GND
F2
GND
F3
GND
F4
GND F5
BAT F6 BAT F7
GND
G1
GND
G2
GND
G3
GND
G4
GND G5 GND G6
BIAS G7
GND
H1
GND
H2
RNG/SS
H7
NTC
H6
VINA
L7 VINA L6 VINA L5
VINC/CLP L4
VINC/CLP L3
VIN L2
VIN L1
CHRG K7
RUN
K6
VINA
K5
VINC/CLP K4
VINC/CLP K3
VIN K2
VIN K1
FAULT J7
TMR
J6
GND J5
GND
J4
GND
J3
GND
J2
BAT C6
GND C5
GND
C4
GND
J1
BAT A7
GND
H3
GND
H4
GND H5
BAT D7
R9
5.1k
1%
R9
5.1k
1%
E2
GND E2 GND
R4
OPT
R4
OPT
E10
GND E10 GND
E3
BAT
E3
BAT
E6
RNG/SS
E6
RNG/SS
R2
0.02
R2
0.02
E1
VIN
E1
VIN
JP2JP2
+
C3 22uF 50V
+
C3 22uF 50V
C4
10uF 35V
C4
10uF 35V
E8
NTC
E8
NTC
E7
CHRG
E7
CHRG
E4
SYSTEM LOAD
E4
SYSTEM LOAD
R1
0
R1
0
R6
0
R6
0
E5
GND
E5
GND
D1 (GRN)D1 (GRN)
21
C1
OPT
C1
OPT
R7 100k 1% R7 100k 1%
R10
5.1k
1%
R10
5.1k
1%
C2
OPT
C2
OPT
R3 0.1 R3 0.1
JP1JP1
E9
FAULT
E9
FAULT

6
dc1645af
DEMO MANUAL
DC1645A-A/DC1645A-B/
DC1645A-C/DC1645A-D
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2010
LT 1210 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union direc-
tive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
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ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
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arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
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