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부품번호 | EV1542DK-SEPIC-00A 기능 |
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기능 | Boost Converter | ||
제조업체 | MPS | ||
로고 | |||
전체 4 페이지수
www.DataSheet4U.com
TM
The Future of Analog IC Technology TM
GENERAL DESCRIPTION
The EV1542DK-SEPIC-00A is the demo board
for sepic applications using the MP1542, a
current mode step up converter with a 2A,
0.18Ω internal switch to provide a highly
efficient regulator with fast response. The
EV1542DK-SEPIC-00A can be operated at
700KHz or 1.3MHz allowing for easy filtering
and low noise. An external compensation pin
gives the user flexibility in setting loop
dynamics, which allows the use of small, low
ESR ceramic output capacitors. The soft-start
results in small inrush current and can be
programmed with an external capacitor. The
EV1542DK-SEPIC-00A can operate from a
single Li-Ion battery to generate 3.3V at up to
500mA.
Other features include under voltage lockout,
current limiting and thermal overload protection,
all available in a low profile 8-pin MSOP
package.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
Output Voltage
Output Current
Symbol
VIN
VOUT
IOUT
Value
3 – 4.2
3.3
500
Units
V
V
mA
EV1542DK-SEPIC-00A
700KHz/1.3MHz Boost Converter
with a 2A Switch
EVALUATION BOARD
FEATURES
• Automatic Up-Down Conversion
• Operates from a Single Li-Ion Battery to
Generate 3.3V at up to 500mA
• Uses Tiny Capacitors and Inductors
• Pin Selectable 700KHz or 1.3MHz Fixed
Switching Frequency
• Programmable Soft-Start
• UVLO, 2A Switch, Thermal Shutdown
• Internal Current Limit
APPLICATIONS
• LCD Displays
• Portable Applications
• Handheld Computers and PDAs
• Digital Still and Video Cameras
“MPS” and “Monolithic Power Systems”, are Trademarks of Monolithic
Power Systems, Inc.
EV1542DK-SEPIC-00A EVALUATION BOARD
Dimensions (2.0”X x 2.0”Y x 0.0”Z)
Board Number
EV1542DK-SEPIC-00A
MPS IC Number
MP1542DK
Efficiency vs
Load Current
90
80
70 VIN=4.2V
60 VIN=3.6V
50
40 VIN=3V
30
20
10
0
1 10 100 1000
LOAD CURRENT (mA)
EV1542_EC02
EV1542DK-SEPIC-00A Rev. 1.0
www.MonolithicPower.com
6/15/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1
TM
EV1542DK-SEPIC-00A — 700KHz/1.3MHz SEPIC CONVERTER WITH A 2A SWITCH
EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is set to 3.3V. The board layout accommodates most commonly used
inductors and output capacitors.
1. Preset the power supply to 3V ≤ VIN ≤ 6V.
2. Turn the power supply off.
3. Connect the power supply terminals to:
a. Positive (+): VIN, EN
b. Negative (–): GND
4. Connect the load to:
a. Positive (+): VOUT
b. Negative (–): GND
5. Turn on the power supply after making connections.
6. The MP1542 is enabled on the evaluation board once VIN is applied. To disable the MP1542,
disconnect EN from IN.
7. The output voltage VOUT can be changed by varying R1. Calculate the new value using the
formula:
R1
=
⎜⎜⎝⎛
VOUT
VFB
− 1⎟⎟⎠⎞R2
Where VFB = 1.25V and R2 = 10kΩ
For example, for VOUT = 5V
R1 =
⎜⎛
⎝
5V
1.25V
− 1⎟⎞ × 10kΩ
⎠
=
30kΩ
Therefore use a 30.1kΩ standard 1% value.
8. The switching frequency is set to 1.3MHz if jumper JP1 is shunted at the H position. To get
700KHz operation, shunt JP1 at the L position.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV1542DK-SEPIC-00A Rev. 1.0
www.MonolithicPower.com
6/15/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
4
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부품번호 | 상세설명 및 기능 | 제조사 |
EV1542DK-SEPIC-00A | Boost Converter | MPS |
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