 |
|
| 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: |
| 19-2608; Rev 0; 10/02 MAX1570 Evaluation Kit General Description The MAX1570 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board. The EV kit contains the MAX1570, a white LED driver with high-efficiency charge pump. The EV kit accepts a 2.7V to 5.5V input and drives up to five white LEDs with regulated constant current for uniform intensity. The MAX1570 runs at 1MHz fixed frequency, allowing tiny external components. o 2.7V to 5.5V Input Range o 30mA/LED Drive Capability o Five LEDs at 150mA Total Current o 0.1A (typ) IC Shutdown Current o Digital PWM LED Dimming Control o Fixed 1MHz Switching Frequency o Surface-Mount Component Construction o 16-Pin 4mm x 4mm Thin QFN Package o Fully Assembled and Tested Features o Excellent (0.3%) LED-to-LED Current Matching Evaluates: MAX1570 Component List DESIGNATION QTY DESCRIPTION 1F 10%, 10V X5R ceramic capacitors (0603) TDK C1608X5R1A105K or Taiyo Yuden JMK107BJ105KA 4.7F 20%, 6.3V X5R ceramic capacitor (0805) Taiyo Yuden JMK212BJ475MG or TDK C2012X5R0J475M Not installed, ceramic capacitor (0603) Surface-mount white LEDs 3-pin headers 9.09k 1% resistor (0603) Not installed, resistor (0603) MAX1570ETE (16-pin QFN (4mm x 4mm)) Shunts MAX1570 PC board MAX1570 EV kit data sheet MAX1570 data sheet PART MAX1570EVKIT Ordering Information TEMP RANGE IC PACKAGE 0C to +70C 16 Thin QFN (4mm x 4mm) C1, C3, C4 3 Quick Start The MAX1570 EV kit is fully assembled and tested. Perform the following steps to verify 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 (EN1) and JU2 (EN2). 2) Connect a 2.7V to 5.5V power supply to the VIN pad. Connect the power-supply ground to the GND pad to the right of VIN. 3) Turn on the power supply. 4) Verify that all five white LEDs are on with uniform intensity. For instructions on dimming control, see Table 1. C2 1 C5 D1-D5 JU1, JU2 R1 R2, R3 U1 None None None None 0 5 2 1 0 1 2 1 1 1 ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX1570 Evaluation Kit Evaluates: MAX1570 Component Suppliers SUPPLIER Taiyo Yuden TDK PHONE 800-348-2496 847-803-6100 FAX 847-925-0899 847-390-4405 WEBSITE www.t-yuden.com www.component.tdk.com Note: Please indicate that you are using the MAX1570 when contacting these suppliers. Detailed Description Jumper Selection The MAX1570 provides pins EN1 and EN2 to control ON/OFF, 1/3, 2/3, and full current, which controls the VSET voltage. Jumpers JU1 and JU2 drive these two pins to either VIN or GND (see Table 1). An external signal can be used to drive any of the EN1 or EN2 control pins by removing the shunts completely from the appropriate jumpers and connecting the external signal to the appropriate connecting pads. Setting LED Current The default LED current is set to 15mA (with shunts across pins 1 and 2 on JU1 and JU2). To set a desired LED current, change R1, where R1 = 230 x VSET / ILED(desired). Table 1. JU1 and JU2 Functions JU1 SHUNT LOCATION 1 and 2 1 and 2 2 and 3 2 and 3 EN1 PIN Connected to VIN Connected to VIN Connected to GND Connected to GND JU2 SHUNT LOCATION 1 and 2 2 and 3 1 and 2 2 and 3 EN2 PIN Connected to VIN Connected to GND Connected to VIN Connected to GND VSET VOLTAGE (mV) 600 400 200 Undefined MAX1570 OUTPUT MAX1570 is enabled, full current. MAX1570 is enabled, 2/3 current. MAX1570 is enabled, 1/3 current. MAX1570 is in shutdown mode. C3 1.0F C4 1.0F 1 VIN C1P 2.7V TO 5.5V C1 1.0F 10V VIN EN1/PWM1 1 2 3 EN2 JU2 VIN 1 2 3 13 IN 12 C1N 14 C2P 16 C2N OUT 15 D1 D2 D3 D4 D5 C2 4.7F 6.3V GND VOUT GND 11 PGND U1 LED1 LED2 8 7 6 5 4 JU1 10 MAX1570 EN1 LED3 LED4 2 LED5 EN2 SET 9 R3 OPEN C5 OPEN R1 9.09k 1% GND 3 PWM2 R2 OPEN Figure 1. MAX1570 EV Kit Schematic 2 _______________________________________________________________________________________ MAX1570 Evaluation Kit Evaluates: MAX1570 Figure 3. MAX1570 EV Kit Component Placement Guide-- Bottom Silkscreen Figure 2. MAX1570 EV Kit Component Placement Guide--Top Silkscreen Figure 4. MAX1570 EV Kit PC Board Layout--Component Side Figure 5. MAX1570 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 3 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
Price & Availability of MAX1570EVKIT
 |
|
|
|
|
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] |