View MP1542DK_1282296.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

TM
EV1542DK-TFT-00A
MP1542 TFT Applications Evaluation Board
EVALUATION BOARD
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.
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 Handheld Computers and PDAs Digital Still and Video Cameras Small LCD Displays
APPLICATIONS
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
"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 1
EV1542DK-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/22/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved.
TM
EV1542DK-TFT-00A - MP1542 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD
EVALUATION BOARD SCHEMATIC
C13 NS
D5 NS VOUT3 +26V / 5mA
C12 NS
VOUT2 -8V / 10mA D2 BAT54S
D3 BAT54S
C15 NS
D6 NS
C8 NS
D4 BAT54S VIN +3.3V D1 1N5819HW-7 VOUT1 +9V / 150mA
GND
6
GND
EN
3
EN
IN
SW
5
JP1 FREQUENCY SELECTION
7
FSEL
MP1542
FB
2
8
SS
GND 4
COMP
1
C4 22nF
C3 2.2nF Note: The traces beneath D6 must be cut before placement of the diode.
EV1542-TFT-00A-S01
EV1542DK-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/22/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved.
2
TM
EV1542DK-TFT-00A - MP1542 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD
EV1542DK-TFT-00A BILL OF MATERIALS
Qty 5 1 1 3 4 2 1 1 3 2 1 1 1 1 1 2 1 Ref C1A, C1B, C2, C5, C6 C3 C4 C7, C11, C14 C8, C12, C13, C15 C9, C10 C16 D1 D2, D3, D4 D5, D6 JP1 L1 R1 R2 R3 R4, R5 U1 Value Description 3.3F Ceramic Cap, 10V, X7R 2.2nF Ceramic Cap, 100V, X7R 22nF Ceramic Cap, 50V, X7R 1F Ceramic Cap, 25V, X7R Do Not Stuff 0.1F Ceramic Cap, 25V, X7R 2.2F Ceramic Cap, 25V, X5R Schottky Diodes, 40V, 1A Schottky Diodes, 30V, 200mA Do Not Stuff 3-Pin Connector Header, 0.100 6.8H 1.7A 61.9k Resistor, 1% 10k Resistor, 1% 10k Resistor, 5% 100k Resistor, 5% DC-DC Converter 0805 1206 TDK Murata C2012X7R1E104K GRM316R61E225KA12D 1N5819HW-7 BAT54S PTC03SAAN LPO2506IB-682 ERJ-6ENF6192V ERJ-6ENF1002V ERJ-6GEYJ103V ERJ-6GEYJ104V MP1542DK Package Manufacturer Manufacturer P/N 1210 0805 0603 0805 Taiyo Yuden TDK TDK TDK LMK325BJ335KD C2012X7R2A222K C1608X7R1H223K C2012X7R1E105K
SOD123 Diodes Inc SOT-23 Fairchild Sullins Coilcraft 0805 Panasonic 0805 Panasonic 0805 Panasonic 0805 Panasonic MSOP8 MPS
EV1542DK-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/22/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved.
3
TM
EV1542DK-TFT-00A - MP1542 TFT APPLICATIONS EVALUATION BOARD EVALUATION BOARD
PRINTED CIRCUIT BOARD LAYOUT
Figure 1--Top Silk Layer
Figure 2--Top Layer
Figure 3--Bottom Layer
EV1542DK-TFT-00A Rev. 1.0 www.MonolithicPower.com 6/22/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved.
4
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:
V R1 = OUT1 - 1R2 V FB
Where VFB = 1.25V and R2 = 10k For example, for VOUT1 = 7.5V
7 .5 V - 1 x 10k = 50k R1 = 1.25 V
Therefore use a 49.9k 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. (c) 2005 MPS. All Rights Reserved.
5

▲Up To Search▲

Price & Availability of MP1542DK

	To Download MP1542DK Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .