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PDF EV1542DK-TFT-00A Data sheet ( Hoja de datos )
| Número de pieza | EV1542DK-TFT-00A | |
| Descripción | TFT Applications Evaluation Board | |
| Fabricantes | MPS | |
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TM
The Future of Analog IC Technology TM
GENERAL DESCRIPTION
The EV1542DK-TFT-00A is the evaluation
board for TFT applications using the MP1542.
The MP1542 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. Soft-start results in small
inrush current and can be programmed with an
external capacitor. The MP1542 operates from
an input voltage as low as 2.5V and can
generate 12V at up to 500mA from a 5V supply.
The EV1542DK-TFT-00A provides VOUT1 from
the boost output and also derives VOUT3
(positive) and VOUT2 (negative) from the charge
pumps off of the boost switching node.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
Output Voltage 1
Output Current 1
Output Voltage 2
Output Current 2
Output Voltage 3
Output Current 3
Symbol
VIN
VOUT1
IOUT1
VOUT2
IOUT2
VOUT3
IOUT3
Value
3 – 3.6
9
150
–8
10
26
5
Units
V
V
mA
V
mA
V
mA
EV1542DK-TFT-00A
MP1542 TFT Applications
Evaluation Board
EVALUATION BOARD
FEATURES
• 3 Outputs in a Single Package: Boost
Converter for 9V, Positive Charge Pump for
26V and Negative Charge Pump for –8V
• 3V to 3.6V Operating Input Range
• Uses Tiny Capacitors and Inductors
• 700KHz/1.3MHz Fixed Switching Frequency
• Externally Compensated
• Programmable Soft-Start
• UVLO, Thermal Shutdown
• Internal Current Limit
APPLICATIONS
• Handheld Computers and PDAs
• Digital Still and Video Cameras
• Small LCD Displays
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
EV1542DK-TFT-00A EVALUATION BOARD
Dimensions (2.0”X x 2.0”Y x 0.4”Z)
Board Number
EV1542DK-TFT-00A
MPS IC Number
MP1542DK
EV1542DK-TFT-00A Rev. 1.0
www.MonolithicPower.com
6/22/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1
1 page  
TM
EV1542DK-TFT-00A – MP1542 TFT APPLICATIONS EVALUATION BOARD
EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is set to 9V, –8V and 26V on VOUT1, VOUT2 and VOUT3,
respectively. The board layout accommodates most commonly used inductors and output capacitors.
1. Preset the power supply to 3V ≤ VIN ≤ 3.6V.
2. Turn off the power supply.
3. Connect the power supply terminals to:
a. Positive (+): VIN, EN
b. Negative (–): GND
4. Connect the load to:
a. Positive (+): VOUT1, VOUT3, GND (for the negative output)
b. Negative (–): GND, VOUT2 (for the negative output)
5. Turn on the power supply after making the connections.
6. The MP1542 is disabled on the evaluation board if only VIN is applied. To enable the MP1542,
EN needs to be pulled HIGH.
7. The output voltage VOUT1 can be changed by varying R1. Calculate the new value using the
formula:
R1 =
⎜⎜⎝⎛
VOUT1
VFB
− 1⎟⎟⎠⎞R2
Where VFB = 1.25V and R2 = 10kΩ
For example, for VOUT1 = 7.5V
R1 =
⎜⎛
⎝
7.5V
1.25V
− 1⎟⎞ × 10kΩ
⎠
=
50kΩ
Therefore use a 49.9kΩ standard 1% value resistor.
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-TFT-00A Rev. 1.0
www.MonolithicPower.com
6/22/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
5
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| PDF Descargar | [ Datasheet EV1542DK-TFT-00A.PDF ] | |
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