dc1621a-ltm8062 evaluation kit quick start guide · 2018. 3. 19. · demonstration circuit 1621a...
TRANSCRIPT
1dc1621af
DEMO MANUAL DC1621A
DESCRIPTION
LTM8062: 32V, 2A µModule Power
Tracking Battery Charger
Demonstration circuit 1621A features the LTM®8062, a 32V, 2A μModule® power tracking battery charger. The demonstration circuit is designed to operate from a 9.75V to 32V input source, and to charge a 2-cell battery pack to a fl oat voltage of 7.2V. The fl oat voltage can easily be changed to a higher or lower voltage by adjusting the values of R2 and R3. R7 and R9 keep the converter off until the input has reached 8.5V, typically. JP2 allows for
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 Specifications of the Demo Board (TA = 25°C)
PARAMETER VALUE
Input Supply Range 9.75V to 32V
Output Voltage Accuracy 7.19V to 7.3V
Typical Output Current Limit 2A
BOARD PHOTO
PERFORMANCE SUMMARY
easy selection of C/10 or timer charge termination. The LTM8062 data sheet must be read in conjunction with this quick start guide for working on or modifying the demo circuit 1621A.
Design fi les for this circuit board are available at http://www.linear.com/demo
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DEMO MANUAL DC1621A
QUICK START PROCEDURE
Demonstration circuit 1621A is easy to set up to evaluate the performance of the LTM8062.
Using short twisted pairs of leads for any power connection, with all loads and power supplies off, refer to Figure 1 for the proper measurement and equipment setup.
Follow the procedure below:
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 4.5V while monitoring the current into the BAT pin. If the current is less than 5mA, turn on PS1. Increase the voltage on PS1 to 8V while monitoring the input cur-rent. If the current is less than 5mA, increase PS1 to 12V.
3. Verify that the battery charging current, IBAT , is between 250mA and 350mA. The CHRG LED should be on and the FAULT LED should be off.
4. Increase PS2 until VBAT is 6.3V. Verify the input current, IIN, is between 1A and 1.5A, the battery current, IBAT , is between 1.775A and 2.225A and that the CHRG LED is on.
5. Increase PS2 until VBAT is 7.4V. Verify the battery charging current, IBAT , is less than 5mA and that the CHRG LED is off.
6. Decrease PS2 until VBAT is 6.8V. Verify the battery current, IBAT , is between 1.775A and 2.225A and that the CHRG LED is on.
7. Set JP1 to off. Verify the charging current, IBAT , is less than 5mA and that the FAULT LED and the CHRG LED are off.
8. Set JP1 to on. Connect a jumper from the NTC pin to ground. Verify the charging current, IBAT , is less than 5mA and that the FAULT LED and the CHRG LED are on.
9. Remove the jumper from NTC to ground. Verify the charging current, IBAT , is between 1.775A and 2.225A and that the FAULT LED is off and the CHRG LED is on.
10. At this point, vary PS1 between the 9.75V to 32V range if desired, and verify the charging current is between 1.775A and 2.225A and that the CHRG LED is on.
11. This concludes the test. Turn off PS1 and PS2.
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DEMO MANUAL DC1621A
QUICK START PROCEDURE
Figure 1. DC1621A Proper Equipment Setup
AM1
VM1
++
–
+
–
–
POWERSUPPLY
PS1
AM2
DC1621 F01
3Ω20WVM2
+
++
–
––
POWERSUPPLY
PS2
IBAT (mA)0
80
EFFI
CIEN
CY (%
)
81
82
83
1000
87
DC1621 F02
500 1500 2000
84
85
86 VINA = 12V
VINA = 24V
IBAT (mA)0
0
INPU
T CU
RREN
T (m
A)
200
1000
1400
1200
DC1621 F03
500 1500 2000
400
600
800
1000
VINA = 12V
VINA = 24V
Figure 2. Effi ciency vs IBAT , 7.2V Float Figure 3. Input Current vs IBAT , 7.2V Float
4dc1621af
DEMO MANUAL DC1621A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components for DC1621A
2 1 C3 Cap. ,SMT, 22μF, 50V, 20% Sanyo, 50CE22BS
3 1 C4 Cap., X5R, 10μF, 35V, 20%, 1210 Taiyo Yuden, GMK325BJ106MN-T
5 1 C6 Cap., X5R, 0.68μF, 10V, 20%,0603 AVX, 0603YD684KAT
12 1 R2 Res., Chip, 549k, 0.1%, 0603 Vishay, TNPW0603549KBKEA
13 1 R3 Res., Chip, 459k, 0.1%, 0603 Vishay, TNPW0603459KBKEA
19 1 U1 I.C. LTM8062, LGA-77-15 ×9 Linear Technology Corporation LTM8062EV
Additional Demo Board Circuit Components
1 0 C1, C2 OPT
4 1 C5 Cap., X5R, 47μF, 16V, 20%, 1210 Taiyo Yuden, EMK325BJ476MM-T
6 1 D1 LED-LN Green Panasonic, LN1351CTR
7 1 D2 LED-LN Red Panasonic, LN1251CTR
11 1 R1 Res., Chip, 0Ω 1/16W 1 AMP, 1206 Vishay, CRCW12060000Z0EA
14 1 R4 Res, Chip, 0.1Ω, 1/8W, 1%,1206 Vishay, WSL1206R1000FEA
15 3 R6, R8, R12 Res., Chip, 0Ω 1/16W , 0603 Vishay, CRCW06030000Z0EA
16 1 R7 Res., Chip, 604k, 1%, 0603 Vishay, CRCW0603604KFKEA
17 1 R9 Res., Chip, 100k, 1%, 0603 Vishay, CRCW0603100KFKEA
18 2 R10, R11 Res., Chip, 5.1k, 1%, 1206 Vishay, CRCW12065K10FKEA
Hardware for Demo Board Only
8 8 E1, E2, E3, E5, E6, E7, E8, E9 Turret, Testpoint Mill Max 2501-2-00-80-00-00-07-0
9 2 JP1, JP2 Headers, 3 Pins 2mm Ctrs. Samtec TMM-103-02-L-S
10 2 XJP1, XJP2 Shunt, 2mm Ctrs. Samtec 2SN-BK-G
5dc1621af
DEMO MANUAL DC1621A
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.
5 5
4 4
3 3
2 2
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C4
10uF
35V
1210
C4
10uF
35V
1210
R7
604K
R7
604K
E3
BA
T
E3
BA
T
D2
FAU
LTR
EDD2
FAU
LTR
ED
U1
LTM
8062
EV
U1
LTM
8062
EV
GNDC1
GNDC2
GNDC3
GNDC4
GNDC5
GNDD1
GNDD2
GNDD3
GNDD4
GNDD5
GNDE1
GNDE2
GNDE3
GNDE4
GNDE5
GNDF1
GNDF2
GNDF3
GNDF4
GNDF5
GNDG1
GNDG2
GNDG3
GNDG4
GNDG5
GNDG6
GN
DH
1G
ND
H2
GN
DH
3G
ND
H4
GN
DH
5G
ND
J1G
ND
J2G
ND
J3G
ND
J4G
ND
J5
GN
DB
1
GN
DB
2
GN
DB
3
GN
DB
4
GN
DB
5
GN
DA
1
GN
DA
2
GN
DA
3
GN
DA
4
GN
DA
5
RU
NK
6
VIN
REG
L6
NTC
H6
TMR
J6
BIA
SG
7
AD
JH
7
CH
RG
K7
FAU
LTJ7
VINAL5 VINAK5
VINAL4 VINAK4
VINL3
VINK3
VINL2
VINK2
VINL1
VINK1
BATA6
BATA7
BATB6
BATB7
BATC6
BATC7
BATD6
BATD7
BATE6
BATE7
BATF6
BATF7
GN
DL7
R6 0R6 0
R12
0R
120
R11
5.1K
1206R11
5.1K
1206
E9VI
NA
E9VI
NA
R8 0R8 0
R4 0.1
1206
R4 0.1
1206
C2
4.7u
F35
V12
10
C2
4.7u
F35
V12
10
JP1
JP1
E2
GN
D
E2
GN
D
R10
5.1K
1206R10
5.1K
1206
R3
459K
0.1
%R
345
9K 0
.1%
JP2
JP2
+C
322
uF 50V
20%
+C
322
uF 50V
20%
1 2
R2
549K
0.1
%R
254
9K 0
.1%
E7C
HR
GE7
CH
RG
R1
0R
10
C6
0.68
uF10
V
C6
0.68
uF10
V
E8FA
ULT
E8FA
ULT
C5 47uF
16V
10%
1210
C5 47uF
16V
10%
1210
D1
CH
RG
GR
N
D1
CH
RG
GR
N
E5N
TCE5
NTC
R9
100K
R9
100K
E6G
ND
E6G
ND
C1
4.7u
F35
V12
10
C1
4.7u
F35
V12
10
E1VI
NE1
VIN
SCHEMATIC DIAGRAM
6dc1621af
DEMO MANUAL DC1621A
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2010
LT 0810 • 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 FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims 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 appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation