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EV1542DK-00A Datasheet(PDF) 4 Page - Monolithic Power Systems |
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EV1542DK-00A Datasheet(HTML) 4 Page - Monolithic Power Systems |
4 / 4 page EV1542DK-00A — 700KHz/1.3MHz BOOST CONVERTER WITH A 2A SWITCH EVALUATION BOARD 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-00A Rev. 1.2 www.MonolithicPower.com 4 6/8/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. TM QUICK START GUIDE The output voltage of this board is set to 8V. The board layout accommodates most commonly used inductors and output capacitors. 1. Preset Power Supply to 2.5V ≤ VIN ≤ 6V. 2. Turn Power Supply off. 3. Connect Power Supply terminals to: a. Positive (+): IN, EN b. Negative (–): GND 4. Connect Load to: a. Positive (+): OUT b. Negative (–): GND 5. Turn Power Supply on 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 fomula: 2 R 1 V V 1 R FB OUT ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ − = Where VFB = 1.25V and R2 = 10kΩ For example, for VOUT = 12V Ω = Ω × ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − = k 86 k 10 1 V 25 . 1 V 12 1 R Therefore use an 86.6kΩ standard 1% value. For output voltages greater than 10V, the output capacitor C2 needs to be replaced with a capacitor with a higher voltage rating suitable for the new output voltage. 8. The switching frequency is set to 1.3MHz if jumper JP1 is shunted between 1 and 2. To get 700KHz operation, shunt JP1 between 2 and 3. |
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