DC2044A - Demo Manual

DEMO MANUAL DC2044A
LTC4020EUHF
High Voltage Buck-Boost
Multi-Chemistry Battery Charger
Description
Demonstration circuit 2044A is a 55V buck-boost multichemistry battery charger featuring the LTC4020. The board
will accept an input voltage between 15V and 55V. The
float voltage of the battery output (BAT) is 25.2V, with 3.3A
maximum charge current. The converter output (VOUT)
has a voltage range of 21V to 28V, with 3A maximum load
current. The LTC4020 contains a high efficiency synchronous buck-boost DC/DC controller and uses a proprietary
average current mode architecture.
The LTC4020 battery charger can provide a constantcurrent/constant-voltage charge algorithm (CC/CV, with
MODE pin grounded), constant-current charging (CC, with
Performance Summary
SYMBOL
MODE pin floated), or charging with an optimized 4-step,
3-stage lead-acid battery charge profile (connect MODE pin
to INTVCC, with a 0Ω jumper at the optional R29 position).
The LTC4020 data sheet gives a complete description of the
IC operation and application information. The data sheet
must be read in conjunction with this quick start guide.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2044A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at TA = 25°C
CONDITIONS
VALUE
Battery Float Voltage (BAT) (Nominal)
IBAT = 0A to 3.3A
25.2V
Converter Output Voltage (VOUT)
IOUT = 0A to 3A
21V to 28V
Maximum Battery Charge Current, IBAT
IOUT = 0A
3.3A
Maximum Converter Output Current, IOUT
IBAT = 0A
3A
Typical Efficiency
VIN = 24V, VOUT = 25.2V, IOUT = 3A
97%
Typical Converter Output Ripple
VIN = 55V, VOUT = 25.2V, IOUT = 3A (20MHz BW)
56mVP-P
Input Voltage Range
15V to 55V
dc2044af
1
DEMO MANUAL DC2044A
Quick Start Procedure
Demonstration circuit 2044A is easy to set up to evaluate
the performance of the LTC4020. Refer to Figure 1 for
the proper measurement equipment setup and follow the
procedure below:
Additional Notes:
1.With power off, connect the input power supply (set
for 0V) to VIN and GND (input return).
2. CAUTION: Batteries are potentially dangerous high
energy sources. Improper connection, overcharge, or
rapid discharge could result in explosion and/or file.
Please read the specification/manual of the battery
before test.
2.Connect the converter output load between VOUT and
GND (Initial load: no load).
3.Connect the DVMs to the input and outputs.
4.Turn on the input power supply and slowly increase
to 24V. Check for the proper output voltages, VOUT of
25.2V and BAT of 25.2V.
5.Once the proper output voltages are established, adjust
the converter output load within the operating range (3A
maximum) and/or adjust input voltage (15V to 55V) and
observe the output voltage regulation, ripple voltage,
efficiency and other parameters.
Note: When measuring the output or input voltage ripple,
do not use the long ground lead on the oscilloscope probe.
See Figure 2 for the proper scope probe technique. Short,
stiff leads need to be soldered to the (+) and (–) terminals
of an output capacitor. The probe’s ground ring needs to
touch the (–) lead and the probe tip needs to touch the
(+) lead.
1. CAUTION: Be careful when testing with high voltage.
High voltage can result in an electric shock if care
is not taken.
3. The combined converter output load current and battery charging current should not exceed 3.3A.
4. Without a proper battery, BAT output can be open or
connected with other suitable loads for test purposes.
It may be a good practice to add low ESR electrolytic
capacitors to the BAT output (≥1000µF at ≥35V, for
25.2V float voltage).
Note: These capacitors help simulate the low impedance
of a battery and maintain stability of the charge current
loop. It’s only needed for test purposes with electronic
or resistive loads, and not needed in the actual battery
application/test (where the BAT load is a battery).
5. BAT float voltage can be easily adjusted with the resistor divider R8/R10. Converter output voltage VOUT can
be adjusted with the resistor divider R9/R11. Adjust/
optimize the loop compensations if necessary.
dc2044af
2
DEMO MANUAL DC2044A
Quick Start Procedure
dc2044a F01
Figure 1. Proper Measurement Equipment Setup
+
VOUT
–
COUT
GND
dc2044a F02
Figure 2. Measuring Output Voltage Ripple
dc2044af
3
DEMO MANUAL DC2044A
Quick Start Procedure
100
90
EFFICIENCY (%)
80
70
60
50
40
30
20
16VIN
55VIN
24VIN
10
0
0.01
0.1
1
LOAD CURRENT (A)
10
dc2044a F03
Figure 3. Efficiency vs Load Current (VOUT = 25.2V)
98
97
EFFICIENCY (%)
96
95
94
93
92
91
90
14 18 22 26 30 34 38 42 46 50 56
VIN (V)
dc2044a F04
Figure 4. Efficiency vs Input Voltage (VOUT = 25.2V, IOUT = 3A)
dc2044af
4
DEMO MANUAL DC2044A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
TDK, C1608X7S2A104K
Required Circuit Components
1
1
C1
CAP, CHIP, X7S, 0.1µF, 10%, 100V, 0603
2
4
C2, C3, C15, C17
CAP, ELEC, 56µF, 20%, 63V, 10.3mm × 10.3mm SUNCON, 63HVH56M
3
1
C4
CAP, CHIP, C0G, 100pF, 10%, 16V, 0402
AVX, 0402YA101KAT9A
4
1
C5
CAP, CHIP, C0G, 0.1µF, 10%, 16V, 1206
KEMET, C1206H104J3GACTU
5
1
C6
CAP, CHIP, X7R 10nF, 10%, 50V, 0603
AVX, 06035C103KAT
6
1
C8
CAP, CHIP, C0G, 680pF, 10%, 50V, 0603
AVX, 06035A681KAT2A
7
1
C9
CAP, CHIP, C0G, 68pF, 5%, 16V, 0402
AVX, 0402YA680JAT4A
8
2
C19, C20
CAP, CHIP, X5R, 0.22µF, 10%, 25V, 0603
AVX, 06033D224KAT2A
9
1
C10
CAP, CHIP, X7R, 0.001µF, 10%, 25V, 0603
AVZ, 06033C102KAT2A
10
1
C11
CAP, CHIP, X5R, 2.2µF, 10%, 16V, 0603
TDK, C1608X5R1C225K
11
1
C12
CAP, CHIP, X7R, 0.033µF, 10%, 25V, 0402
TDK, C1005X7R1E333K
12
6
C14, C16, C18, C23, C27, C28
CAP, CHIP, X7S, 4.7µF,20%, 100V, 1210
TDK, C3225X7S2A475M
13
1
C21
CAP, CHIP, X5R, 10µF, 20%, 6.3V, 0805
AVX, 08056D106KAT2A
14
2
D1, D2
DIODE, SMT, SUPERBARRIER, 60V, 0.5A,
SOD123
DIODES INC, SBR0560S1
15
1
D3
DIODE, LED, RED, SMT, 0603
PANASONIC, LNJ208R8ARA
16
1
D4
DIODE, LED, GREEN, 0603
LITE-ON, LTST-C190KGKT
17
1
D6
DIODE, SMT SCHOTTKY BARRIER RECTIFIER,
SMA
VISHAY, B360A-E3
18
1
L1
IND, SMT, 15µH, 10A, 20%, 10mm × 11.3mm
COILCRAFT, XAL1010-153MEB
19
1
M1
P-CHANNEL MOSFET, –60V, –14.4A,
PowerPAKSO8
VISHAY, Si7461DP-T1-E3
20
2
M2, M3
DUAL N-CHANNEL MOSFET, 60V, 9.7A,
PowerPAKSO8
VISHAY, Si7960DP-T1-E3
21
1
R2
RES, CHIP, 510kΩ, 5%, 0402
VISHAY, CRCW0402510KFKED
22
5
R1, R4, R5, R12, R13
RES, CHIP, 100kΩ, 5%, 0402
VISHAY, CRCW0402100KJNED
23
2
R6, R7
RES, CHIP, 20Ω, 5%, 0402
VISHAY, CRCW040220R0JNED
24
1
R8
RES, CHIP, 226kΩ, 0.1%, 0603
VISHAY, TNPW06030F226BEEA
25
1
R9
RES, CHIP, 226kΩ, 1%, 0402
VISHAY, CRCW0402226KFKED
26
1
R10
RES, CHIP, 24.9kΩ, 0.1%, 0402
VISHAY, TNPW04020F24K9BEED
27
1
R11
RES, CHIP, 24.9kΩ, 1%, 0402
VISHAY, CRCW040224K9FKED
28
1
R14
RES, CHIP, 10kΩ, 1%, 0402
VISHAY, CRCW040210K0FKED
29
1
R15
RES, CHIP, 56kΩ, 1%, 0402
VISHAY, CRCW040256K0FKED
30
1
R16
RES, CHIP, 47kΩ, 1%, 0402
VISHAY, CRCW040247K0FKED
31
8
R21 TO 25, R34, R35, R37
RES, CHIP, 0Ω JUMPER, 0402
VISHAY, CRCW04020000Z0ED
32
1
R36
RES, CHIP, 0Ω JUMPER, 0603
VISHAY, CRCW06030000Z0EA
33
2
R18, R20
RES, CHIP, 100Ω, 5%, 0402
VISHAY, CRCW0402100RJNED
34
1
R19
RES, CHIP, 4.7Ω, 5%, 0402
VISHAY, CRCW04024R70JNED
35
2
R26, R27
RES, CHIP, 3kΩ, 5%, 0402
VISHAY, CRCW04023K00JNED
dc2044af
5
DEMO MANUAL DC2044A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
36
1
R28
RES, CHIP, 51kΩ, 5%, 0402
VISHAY, CRCW040251K00JNED
37
1
R38
RES, CHIP, 5.1, 5%, 0805
VISHAY, CRCW08055R10JNEA
38
2
RCBRB1, RCBRT1
RES, CHIP, 0.008Ω, 1%, 0.5W, 1206
VISHAY, WSL12068L000FEA18
39
1
RCBAT1
RES, CHIP, 0.015Ω, 1%, 0.5W, 1206
TT ELEC LRC-LRF1206F-01-F
40
1
U1
IC, LTC4020EUHF, 5mm × 7mm QFN38
LINEAR TECHNOLOGY, LTC4020EUHF
Additional Demo Board Circuit Components
1
0
C7, C13, C22, C24 ,C25 , C26, C30,
C31 (OPT)
CAP, CHIP, OPTIONAL
2
0
D7 (OPT)
DIODE, SMT SOD123
3
0
D5(OPT)
DIODE, SMT SCHOTTKY BARRIER RECTIFIER,
SMA
4
0
R3, R17, R29, R31, R32 OPT
RES, OPTIONAL
Hardware: For Demo Board Only
1
11
E1, E2, E5 TO E10, E13, E14, E17
TURRET, 0.09" DIA
MILL-MAX, 2501-2-00-80-00-00-07-0
2
6
E3, E4, E11, E12, E15, E16
VERTICAL BANANA JACK, 575-4
KEYSTONE, 575-4
3
4
STAND-OFF, NYLON (SNAP ON), 0.375" TALL
KEYSTONE, 8832 (SNAP ON)
4
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 2044A
dc2044af
6
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.
A
B
C
D
MODE
NTC
SGND
ILIMIT
RNG / SS
SHDN
GND
VIN
15V - 55V
E8
E17
E9
E7
E6
E5
E2
E4
E3
E1
R4
100k
5
R29
OPT
R14
10k
+
C4
100pF
16V
C3
56uF
63V
63HVH56M
INT_VCC
R5
100k
+
C5
0.1uF
1206
R10
24.9k
0.1%
R8
226k
0.1%
0603
R11
24.9k
R9
226k
R7
20
R6
20
R28
51k
VOUT
R13
100k
C23
4.7uF
100V
1210
VBAT
C16
4.7uF
100V
1210
R37
C25
OPT
R3
OPT
R1
100k
0
8
14
11
24
16
18
17
26
19
25
15
10
9
0603
R17
R2
510k
OPT
RT
TIMER
MODE
CSOUT
NTC
FBG
VFB
4
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
3
36
U1
PVIN
C1
0603
OPT
29
SGND
35
PGND
BG1
TG1
SW1
SW2
STAT1
BST1
BST2
STAT2
INT_Vcc
SENSVIN
SENSTOP
39
SGND
Vc
ITH
BAT
BGATE
CSN
CSP
BG2
TG2
SENSBOT
SENSGND
0603
100V
0.1uF
LTC4020EUHF
5.1
SGND
0805
C13
VFBMAX
VFBMIN
ILIMIT
RNG/SS
VIN_REG
SHDN
NOTE: UNLESS OTHERWISE SPECIFIED
R12
100k
C24
OPT
C2
56uF
63V
63HVH56M
R38
28
27
20
21
22
23
33
31
5
4
37
1
38
32
12
2
30
13
34
7
6
0
R21
4
R34
3
C6
10nF
0603
R15
56k
0
0
M2B
Si7960DP
0 2
C12
0.033uF
R22
R24
M2A
Si7960DP
C21
10uF
6.3V
0805
C22
0.033uF
OPT
3
7
8
1
C7
OPT
0
C8
680pF
0603
R16
47k
R35
D5
B360A
OPT
OPT
0603
C30
OPT
0603
0603
R31
R36
0
RCBRT1
0.008
0.5W
1206
RCBRB1
0.008
0.5W
1206
5
6
3
R20
D6
B360A
D7
OPT
100
100
D3
RED
4
2
C10
1nF
0603
25V
R23
0
Si7960DP
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
4
SCALE = NONE
HZ
Charlie Z.
PCB DES.
APPROVALS
5 6 7 8
M1
Si7461DP
1 2 3
RCBAT1
0.015
0.5W
1206
VOUT
APP ENG.
0
R25
D4
GREEN
M3B
M3A
Si7960DP
CUSTOMER NOTICE
R18
C31
OPT
0603
R32
OPT
0603
C11
2.2uF
0603
R19
4.7
3K
R26
C20
0.22uF
25V
0603
3K
R27
D2
SBR0560S1
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C9
68pF
15uH
XAL1010-153ME
L1
C19
0.22uF
25V
0603
D1
SBR0560S1
INT_VCC
6
5
3
4
8
7
1
5
C18
4.7uF
1210
100V
2
1
DATE:
N/A
SIZE
1
C28
4.7uF
1210
100V
VBAT
+
E11
E12
E10
C17
56uF
63V
63HVH56M
1
DEMO CIRCUIT 2044A
Thursday, September 19, 2013
LTC4020EUHF
GND
VOUT
21V - 28V
3A MAX
GND
SHEET 1
HIGH VOLTAGE BUCK / BOOST
MULTI-CHEMISTRY BATTERY CHARGER
IC NO.
DATE
5-29-13
8-13-12
BAT
25.2V VFLOAT
3.3A MAX
E13
E15
E16
E14
Charlie Z.
GB
APPROVED
OF
1
2
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
C26
OPT
1210
+ C15
56uF
63V
63HVH56M
PRODUCTION
1st PROTOTYPE
DESCRIPTION
REVISION HISTORY
TECHNOLOGY
C27
4.7uF
1210
100V
REV
TITLE: SCHEMATIC
C14
4.7uF
1210
100V
__
ECO
A
B
C
D
DEMO MANUAL DC2044A
Schematic Diagram
dc2044af
7
DEMO MANUAL DC2044A
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
directive 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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc2044af
8
Linear Technology Corporation
LT 1113 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
Similar pages