TM EV1541DJ-TFT-00A MP1541 TFT Applications Evaluation Board The Future of Analog IC Technology TM EVALUATION BOARD GENERAL DESCRIPTION FEATURES The EV1541DJ-TFT-00A is the evaluation board for TFT applications using the MP1541. The MP1541 is a 5-pin thin SOT23 current mode step up converter intended for small, low power applications. The MP1541 switches at 1.3MHz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height. Internal soft start results in small inrush current and extends battery life. The MP1541 operates from an input voltage as low as 2.5V and can generate 12V at up to 200mA from a 5V supply. • • • • • • The EV1541DJ-TFT-00A provides VOUT from the boost output and also derives VP (positive) and VN (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 Value Units VIN VOUT IOUT VN IN VP IP 3 – 3.6 5 200 –10 10 15 20 V V mA V mA V mA • • • 3V to 3.6V Operating Input Range Uses Tiny Capacitors and Inductors 1.3MHz Fixed Switching Frequency Internally Compensated Internal Soft Start 3 Outputs in a Single Package: Boost Converter for 5V, Charge Pump for 15V, and Negative Charge Pump for –10V UVLO, Thermal Shutdown Internal Current Limit Available in a TSOT23-5 Package 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. EV1541DJ-TFT-00A EVALUATION BOARD Dimensions (2.0”X x 2.0”Y x 0.4”Z) Board Number MPS IC Number EV1541DJ-TFT-00A MP1541DJ EV1541DJ-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/8/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 1 TM EV1541DJ-TFT-00A – MP1541 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD EVALUATION BOARD SCHEMATIC D4 D7 VP 15V @ 20mA VN --10V @ 10mA R7 NS R6 NS VGH D3 ZD1 NS VGL C10 NS ZD2 NS D6 C17 NS SW SW JP2 D2 D5 VOUT JP1 VIN OPTIONAL FOR 3X MODE SW VIN 3.3V VIN VOUT D1 GND R4 NS U1 5 IN SW VOUT 5V @ 200mA GND 1 C2 NS MP1541 EN 4 2 EN FB 3 GND EV1541_TFT_S01 EV1541DJ-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/8/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 2 TM EV1541DJ-TFT-00A – MP1541 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD EV1541DJ-TFT-00A BILL OF MATERIALS Qty Ref Value Description 1 C1 10µF 3 1 C2, C10, C17 C3 10 C4, C5, C6, C7, C8, C11, C12, C13, C14, C15 2 C9, C16 1 D1 TDK C3225X5R1A106K 4.7µF Ceramic Cap, 10V, X5R 1210 Taiyo Yuden LMK325BJ475KD 0.1µF Ceramic Cap, 50V, X7R 0805 TDK C2012X7R1H1 04K 0805 TDK C2012X5R1E105K 1µF Not Stuffed Ceramic Cap, 25V, X5R Schottky Diodes, 40V, 1A SOD-123 Diodes Inc 1N5819HW-7 Diode Rectifier, Dual, 30V, 200mA SOT-123 Fairchild BAT54S 2 D2, D3, D4, D5, D6, D7 JP1, JP2 1 L1 3.3µH 1.6A 1 R1 30.1kΩ Metal Film Res, 1% 1 R2 2 R3, R5 6 1 R4, R6, R7 U1 2 ZD1, ZD2 3 Manufacturer P/N 1210 NS Ceramic Cap, 10V, X5R Package Manufacturer 3-Pin Connector Header, 0.100 Sullins PTC03SAAN Sumida CDRH4D28CLD-3R3 0805 Panasonic ERJ-6ENF3012V 10kΩ Metal Film Res, 1% 0805 Panasonic ERJ-6ENF1002V 100kΩ Metal Film Res, 5% 0805 Panasonic ERJ-6GEYJ104V NS Not Stuffed DC-DC Converter NS TSOT23-5 MPS MP1541DJ Not Stuffed EV1541DJ-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/8/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 3 TM EV1541DJ-TFT-00A – MP1541 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV1541DJ-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/8/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 4 TM EV1541DJ-TFT-00A – MP1541 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD QUICK START GUIDE The output voltage of this board is set to 5V, –10V and 15V on VOUT, VN and VP, 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 (+): VOUT, VP, GND (for the negative output) b. Negative (–): GND, VN (for the negative output) 5. Turn on the power supply after making the connections. 6. The MP1541 is disabled on the evaluation board if only VIN is applied. To enable the MP1541, EN needs to be pulled HIGH. 7. The output voltage VOUT can be changed by varying R1. Calculate the new value using the formula: ⎛V ⎞ R1 = ⎜⎜ OUT − 1⎟⎟R2 ⎝ VFB ⎠ Where VFB = 1.25V and R2 = 10kΩ For example, for VOUT = 7.5V ⎛ 7 .5 V ⎞ − 1⎟ × 10kΩ = 50kΩ R1 = ⎜ ⎝ 1.25 V ⎠ 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. EV1541DJ-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/8/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 5