 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 19-1864; Rev 0; 11/00 MAX1817 Evaluation Kit General Description The MAX1817 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that demonstrates the MAX1817 dual-output, step-up DC-DC converter. The main output is configured for +3.3V and provides up to 125mA of current. The LCD bias output is configured for +18.0V and provides up to 10mA. The EV kit can support the dual output with a +1.5V to +3.3V input voltage range. o Dual Output Voltages +3.3V Main Output +18V LCD Bias Output o Adjustable Output Voltages o 125mA Available from the Main Output o 10mA Available from the LCD Bias Output o Input Voltage as Low as +1.5V o Low 15A Quiescent Supply Current o Surface-Mount Construction Features Evaluates: MAX1817 Component List DESIGNATION QTY DESCRIPTION 10F, 6.3V, X5R ceramic capacitor (1206) Taiyo Yuden JMK316BJ106ML or TDK C3216X5R0J106KT 1F, 35V, X7R ceramic capacitor (1206) Taiyo Yuden GMK316BJ105ML or equivalent 22F, 6.3V, X5R ceramic capacitor (1210) Taiyo Yuden JMK325BJ226MM 5.0pF, 50V ceramic capacitor (0603) Murata GRM39COG050B050 or Taiyo Yuden UMK107CH050CZ Not installed (0603) 1M 1% resistor (0805) 75k 1% resistor (0805) Not installed (0805) 200mA, 75V junction diode (SOT-23) Central Semiconductor CMPD4448 0.5A, 30V Schottky diode (SOD-123) Nihon EP05Q03L 10H, 1A inductors Sumida CR43-100MC MAX1817EUB (10-pin MAX) 3-pin headers Shunts (JU1, JU2) MAX1817 PC board MAX1817 data sheet MAX1817 EV kit data sheet o Fully Assembled and Tested Ordering Information PART MAX1817EVKIT TEMP. RANGE 0C to +70C IC PACKAGE 10 MAX C1 1 Component Suppliers SUPPLIER Central Semiconductor Murata Nihon Sumida Taiyo Yuden TDK PHONE 631-435-1110 814-237-1431 661-867-2555 847-956-0666 408-573-4150 847-803-6100 FAX 631-435-3388 814-238-0490 661-867-2698 847-956-0702 408-573-4159 847-803-6296 C2 1 C3 1 C4 C5, C6 R1 R2 R3, R4 D1 D2 L1, L2 U1 JU1, JU2 None None None None 1 0 1 1 0 1 1 2 1 2 2 1 1 1 Note: Please indicate that you are using the MAX1817 when contacting these component suppliers. Quick Start The MAX1817 EV kit is a fully assembled and tested surface-mount board. Follow the steps below for board operation. Do not turn on the power supply until all connections are completed. 1) Verify that shunts are across pins 1 and 2 of jumpers JU1 and JU2 to enable the main output and the LCD output, respectively. 2) Connect a voltmeter across the VOM pad and the nearest GND pad to monitor the main output voltage. 3) Connect a voltmeter across the VOLCD pad and the nearest GND pad to monitor the LCD output voltage. 4) Connect a +1.5V to +3.3V supply to the VBATT pad. Connect the ground to the GND pad. 5) Turn on the power supply and verify that the main output VOM is at +3.3V and the VOLCD output is at +18.0V. 1 ________________________________________________________________ Maxim Integrated Products For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX1817 Evaluation Kit Evaluates: MAX1817 Detailed Description The MAX1817 EV kit is a fully assembled and tested surface-mount circuit containing a dual-output, step-up DC-DC converter. The main output (VOM) is configured to supply 125mA (typ) at +3.3V, and the LCD bias output (VOLCD) is configured to supply 10mA (typ) at +18.0V. The circuit requires a power supply with a +1.5V to +3.3V input voltage range. VOM and VOLCD output voltages are adjustable with external resistors. the PCB short (located at R4) and installing resistors R3 and R4. Refer to the Setting the Main Output Voltage section of the MAX1817 data sheet for instructions on selecting R3 and R4. The +18.0V LCD bias output voltage is set with voltagedivider resistors R1 and R2. These resistors divide the output voltage to the +1.25V LCD feedback regulation threshold at FBLCD. The output can be adjusted to a maximum of +28.0V by replacing resistors R1 and R2. Refer to the Setting the LCD Output Voltage section of the MAX1817 data sheet for instructions on selecting R1 and R2. Input Source The MAX1817 EV kit requires a +1.5V to +3.3V voltage input to maintain the main output voltage at +3.3V and the LCD bias output voltage at +18.0V. However, if the input voltage is raised to the +5.5V maximum input, the VOM output voltage will increase to equal the input voltage minus the diode (D2) voltage drop. At the +5.5V maximum input voltage, the VOLCD output voltage will remain steady at +18.0V. Enable/Disable The EV kit contains two 3-pin jumpers (JU1 and JU2) that allow the user to enable and disable the main output (VOM) or the LCD output (VOLCD). Refer to Table 1 for jumper configuration. Note that the main output voltage must be at least +2.5V to enable the LCD output. Adjustable Outputs The VOM output voltage is set to +3.3V by a PCB short from FB to ground. The output voltage can be adjusted to a different voltage (+2.5V to +5.5V) by cutting open Table 1. Jumper JU1 Functions JUMPER JU1 2 and 3 1 and 2 JU2 2 and 3 ONLCD connected to GND VOLCD output disabled ON connected to GND ONLCD connected to VOM VOM output disabled VOLCD output enabled STATUS 1 and 2 PIN CONNECTION ON connected to VOM EV KIT OPERATION VOM output enabled 2 _______________________________________________________________________________________ MAX1817 Evaluation Kit Evaluates: MAX1817 L1 10H C1 10F L2 10H VOM U1 1 2 3 JU1 2 ON MAX1817 LXLCD 6* NC OUT 10 C6 OPEN JU2 3 ONLCD FBLCD 4 C5 OPEN R3 OPEN C3 22F 7 LX 9 D2 R2 75k 1% VBATT (+1.5V TO +3.3V) D1 R1 1M 1% C2 1.0F VOLCD (+18.0V) GND C4 5.0pF GND VOM (+3.3V) VOM 1 2 3 FB 1 AGND 5 GND 8 R4 SHORTED (PC BOARD TRACE) * NC CONNECTION NOT REQUIRED Figure 1. MAX1817 EV Kit Schematic 1.0" Figure 2. MAX1817 EV Kit Component Placement Guide-- Component Side 1.0" Figure 3. MAX1817 EV Kit PC Board Layout--Component Side _______________________________________________________________________________________ 3 MAX1817 Evaluation Kit Evaluates: MAX1817 1.0" Figure 4. MAX1817 EV Kit PC Board Layout--Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
Price & Availability of MAX1817EVKIT
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |