DC2186A - Demo Manual

DEMO MANUAL DC2186A
LT8580
Boost/SEPIC/Inverting
Regulator
Description
Demonstration circuits 2186A-A and 2186A-B feature the
LT8580EDD in boost/inverting configurations. The demo
circuits demonstrate small size and low component count.
The boost is designed to convert a 3V to 10V source to
12V at 120mA. The inverter converts a 5V to 12V source
to –12V at 150mA. Please refer to Figures 4 and 5 below
for maximum load current at different input voltage levels.
Both converters use only one feedback resistor to set the
output voltage.
The LT®8580 can operate with inputs as high as 40V but
in these demo circuits, the input is limited by the voltage
rating of the input capacitors, and the magnitude of the
boost output voltage.
DC2186 includes an optional charge pump circuit on
the back of the board, for higher output voltages. If this
circuit is used, remove R11 and recalculate the feedback
resistor. The same output node will have the output of
the charge pump.
The LT8580 includes many other features such as synchronization to external clock, user configurable undervoltage lockout, soft-start, frequency foldback, and it is
easily configured as boost, SEPIC or inverting converter.
The data sheet gives a complete description of the device,
operation and application information. The data sheet must
be read in conjunction with this demo manual for DC2186A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2186A
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.
Performance Summary DC2186A-A
SYMBOL
PARAMETER
VIN
Input Supply Range
VOUT
Output Voltage Range
Specifications are at TA = 25°C
CONDITIONS
MIN
TYP
3
VIN = 3V, ILOAD = 120mA
11.64
MAX
10
12
12.36
UNITS
V
V
RIPPLE
VIN = 3V, ILOAD = 120mA
25
mV
EFFICIENCY
VIN = 5V, ILOAD = 200mA
88
%
1.5
MHz
SWITCHING FREQUENCY
Performance Summary DC2186A-B
SYMBOL
PARAMETER
VIN
Input Supply Range
VOUT
Output Voltage Range
Specifications are at TA = 25°C
CONDITIONS
TYP
5
VIN = 5V, ILOAD = 150mA
RIPPLE
VIN = 5V, ILOAD = 150mA
EFFICIENCY
VIN = 12V, ILOAD = 200mA
SWITCHING FREQUENCY
MIN
–11.64
MAX
12
–12
5
–12.36
UNITS
V
V
mV
82
%
1.5
MHz
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1
DEMO MANUAL DC2186A
Quick Start Procedure
DC2186A is easy to set up to evaluate the performance of
the LT8580. Refer to Figures 1 and 2 for proper measurement equipment setup and follow the procedure below:
NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN or
VOUT and GND terminals. See Figure 3 for proper scope
probe technique.
1.With power off, connect the input power supply to VIN
and GND.
2.Turn on the power at the input.
NOTE: Make sure that the input voltage does not exceed
10V for DC2186A-A and 12V for DC2186A-B.
3.Check for the proper output voltage.
NOTE: If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
4.Once the proper output voltages are established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
Figure 1. DC2186A-A Proper Equipment Setup
2
dc2186af
DEMO MANUAL DC2186A
Quick Start Procedure
Figure 2. DC2186A-B Proper Equipment Setup
GND
VIN
Figure 3. Measuring Input or Output Ripple
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3
DEMO MANUAL DC2186A
Quick Start Procedure
450
240
400
220
350
200
LOAD (mA)
LOAD (mA)
300
250
200
150
160
140
100
120
50
0
180
3
4
5
6
7
INPUT (V)
8
9
100
10
5
6
DC2186A F04
Figure 4. DC2186A-A Maximum Load Current vs Input Voltage
80
90
EFFICIENCY (%)
EFFICIENCY (%)
60
50
40
30
12
70
60
50
40
30
20
20
15
30
45
60
75
90 105
OUTPUT CURRENT (mA)
10
120
50
100 150 200 250 300 350 400 450
OUTPUT CURRENT (mA)
DC2186A F07
DC2186A F06
Figure 6. DC2186A-A Efficiency at 3VIN
Figure 7. DC2186A-A Efficiency at 10VIN
90
90
80
80
70
70
EFFICIENCY (%)
EFFICIENCY (%)
11
80
70
60
50
40
60
50
40
30
30
20
20
15
30
45 60 75 90 105 120 135 150
OUTPUT CURRENT (mA)
DC2186A F08
Figure 8. DC2186A-B Efficiency at 5VIN
4
10
Figure 5. DC2186A-B Maximum Load Current vs Input Voltage
100
10
8
9
INPUT (V)
DC2186A F05
90
10
7
10
25
50
75 100 125 150 175 200 225
OUTPUT CURRENT (mA)
DC2186A F09
Figure 9. DC2186A-B Efficiency at 12VIN
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DEMO MANUAL DC2186A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC2186A-A Required Circuit Components
1
2
C4, C11
CAP., X7R, 4.7µF, 16V, 10% 1206
MURATA, GRM31CR71C475KA01L
2
1
C5
CAP., X7R, 0.1µF, 16V, 10% 0603
MURATA, GRM188R71C104KA01D
3
1
C6
CAP., X7R, 0.1µF, 16V, 10% 0402
MURATA, GRM155R71C104KA88D
4
1
C7
CAP., X7R, 3.3nF, 16V, 10% 0603
AVX, 0603YC332KAT2A
5
1
C8
CAP., C0G, 47pF, 16V, 5% 0402
MURATA, GRM1555C1E470JA01D
6
1
D1
DIODE, DFLS130L PowerDI123
DIODES., DFLS130L-7
7
1
L1
INDUCTOR, 15µH, SD18
COOPER, SD18-150-R
8
2
R1, R11
RES., CHIP., 0Ω, 1/8W, 0805
VISHAY, CRCW08050000Z0EA
9
1
R2
RES., CHIP., 130k, 1/10W, 1%, 0603
VISHAY, CRCW0603130KFKEA
10
1
R5
RES., CHIP., 6.04k, 1/10W, 1%, 0603
VISHAY, CRCW06036K04FKEA
11
1
R4
RES., CHIP., 10k, 1/8W, 1%, 0805
VISHAY, CRCW080510K0FKEA
12
1
R6
RES., CHIP., 56.2k, 1/10W, 1%, 0603
VISHAY, CRCW060356K2FKEA
13
1
R8
RES., CHIP., 100k, 1/8W, 1%, 0805
VISHAY, CRCW0805100KFKEA
14
1
R12
RES., CHIP., 11.3k, 1/8W, 1%, 0805
VISHAY, CRCW080511K3FKEA
15
1
U1
IC., LT8580EDD 8L DFN
LINEAR TECH., LT8580EDD#TRPBF
Additional Demo Board Circuit Components
1
0
C9 (OPT)
CAP., 0805
2
0
C10 (OPT)
CAP., 1206
3
0
D3, D4 (OPT)
DIODE, Di123
4
0
C1 (OPT)
CAP., 0805
5
0
D2 (OPT)
DIODE, PowerDI123
6
0
L2 (OPT)
INDUCTOR
7
0
R9, R10 (OPT)
RES., CHIP., 0805
Hardware: For Demo Board Only
1
6
E1-E6
TESTPOINT, TURRET, .094" PBF
MILL-MAX, 2501-2-00-80-00-00-07-0
2
4
MH1-MH4
STAND-OFF, NYLON 0.25"
KEYSTONE, 8831(SNAP ON)
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5
DEMO MANUAL DC2186A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC2186A-B Required Circuit Components
1
1
C1
CAP., X5R, 1µF, 25V, 10% 0805
AVX, 08053D105KAT2A
2
2
C4, C11
CAP., X7R, 4.7µF, 16V, 10% 1206
MURATA, GRM31CR71C475KA01L
3
1
C5
CAP., X7R, 0.1µF, 16V, 10% 0603
MURATA, GRM188R71C104KA01D
4
1
C6
CAP., X7R, 0.1µF, 16V, 10% 0402
MURATA, GRM155R71C104KA88D
5
1
C7
CAP., X7R, 2.2nF, 16V, 10% 0603
AVX, 0603YC222KAT2A
6
1
C8
CAP., C0G, 47pF, 16V, 5% 0402
MURATA, GRM1555C1E470JA01D
7
1
D2
DIODE, DFLS130L PowerDI123
DIODES., DFLS130L-7
8
2
L1, L2
INDUCTOR, 33µH, SD18
COOPER, SD18-330-R
9
2
R1, R11
RES., CHIP., 0Ω, 1/8W, 0805
VISHAY, CRCW08050000Z0EA
10
1
R2
RES., CHIP., 143k, 1/10W, 1%, 0603
VISHAY, CRCW0603143KFKEA
11
1
R4
RES., CHIP., 10k, 1/8W, 1%, 0805
VISHAY, CRCW080510K0FKEA
12
1
R5
RES., CHIP., 20k, 1/10W, 1%, 0603
VISHAY, CRCW060320K0FKEA
13
1
R6
RES., CHIP., 56.2k, 1/10W, 1%, 0603
VISHAY, CRCW060356K2FKEA
14
1
R8
RES., CHIP., 100k, 1/8W, 1%, 0805
VISHAY, CRCW0805100KFKEA
15
1
R12
RES., CHIP., 22.1k, 1/8W, 1%, 0805
VISHAY, CRCW080522K1FKEA
16
1
U1
IC., LT8580EDD 8L DFN
LINEAR TECH., LT8580EDD#TRPBF
Additional Demo Board Circuit Components
1
0
C9 (OPT)
CAP., 0805
2
0
C10 (OPT)
CAP., 1206
3
0
D3, D4 (OPT)
DIODE, Di123
4
0
D1 (OPT)
DIODE, PowerDI123
5
0
R9, R10 (OPT)
RES., CHIP., 0805
Hardware: For Demo Board Only
1
6
E1-E6
TESTPOINT, TURRET, .094" PBF
MILL-MAX, 2501-2-00-80-00-00-07-0
2
4
MH1-MH4
STAND-OFF, NYLON 0.25"
KEYSTONE, 8831(SNAP ON)
6
dc2186af
1
2
GND
SHDN
5
C11
4.7uF
16V
1206
SHDN
SYNC
R4
SYNC
10K
E6
0805
R8
100K
SHDN
*0805
R12
R1
0
0805
VIN
C6
0.1uF
L1
*
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.
12V / 120mA - 450mA
-12V / 150mA - 230mA
3V - 10V
5V - 12V
DC2186A-A
DC2186A-B
B
VOUT
VIN
*
4
SW
*
VC
FB
D1
D1
*
2
*
*
D2
VB
NOT USED
DFLS130L
NOT USED
D2
*
C1
*
L2
1uF, 25V
2.2nF
3.3nF
C7
SW
*
SD18-330-R
SD18-330-R
A
NOT USED
R10
OPT
0805
SD18-150-R
VB
1
D4
OPT
L2
OPT
0805
OPT
0805
C4
4.7uF
16V
1206
0
0805
R11
L1
C9
R9
0603
R2
VOUT
OPTIONAL CIRCUIT
C8
47pF
NOT USED
0603
C7
R5
U1
LT8580EDD 0603
2
1
0805
C1
1
1
2
SW
DFLS130L
R6
56.2K
0603
ASSEMBLY TYPE
VERSION TABLE
1. ALL RESISTORS ARE 0402.
ALL CAPACITORS ARE 0402.
NOTE: UNLESS OTHERWISE SPECIFIED
E3
E2
E1
3
SYNC
8
SS
7
RT
6
GND
9
VIN*
VIN
A
2
1
B
D3
OPT
143K
130K
R2
2
E5
E4
R5
20K
6.04K
C10
OPT
1206
VOUT
C5
0.1uF
16V
0603
VOUT
*
22.1K
11.3K
R12
GND
VOUT
1
2
DEMO MANUAL DC2186A
Schematic Diagram
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7
DEMO MANUAL DC2186A
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
8
dc2186af
Linear Technology Corporation
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1630 McCarthy Blvd., Milpitas, CA 95035-7417
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●
FAX: (408) 434-0507 ● www.linear.com
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