EV1542DK-TFT-00A Datasheet, PDF (5/5 Pages) Monolithic Power Systems – MP1542 TFT Applications Evaluation Board

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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 ≤ V_IN ≤ 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 V_OUT1 can be changed by varying R1. Calculate the new value using the
formula:
R1 =
⎜⎜⎝⎛
V_OUT1
V_FB
− 1_{⎟⎟⎠⎞}R2
Where V_FB = 1.25V and R2 = 10kΩ
For example, for V_OUT1 = 7.5V
R1 = ⎜⎛ ^7.5V − 1⎟⎞ × 10kΩ = 50kΩ
⎝ ^1.25V ⎠
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
5
6/22/2005
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