MIC2287-3-LED-EV
MIC2287-3-LED-EV Datasheet
MIC2287 MLF Evaluation Board
| Part | Datasheet |
|---|---|
MIC2287-3-LED-EV |
MIC2287-3-LED-EV (pdf) |
| Related Parts | Information |
|---|---|
MIC2287-6-LED-EV |
MIC2287-6-LED-EV |
| PDF Datasheet Preview |
|---|
| MIC2287 MLF Evaluation Board 1.2MHz PWM White LED Driver The MIC2287 is a small 1.2MHz constant frequency PWM white LED driver. The MIC2287 is available in either a Thin SOT-23 or a 2mm x 2mm MLF package. High power densities in a very small size are achieved using its internal 34V/500mA switch. Requirements The MIC2287 evaluation board requires an input power source that is able to deliver greater than 500mA at 2.5V. The MIC2287 evaluation board is tailored for a Li-Ion range input supply voltage. It should not exceed 10V on the input. Getting Started Connect an external supply to VIN. Apply desired input voltage to the VIN J1 and ground J2 and J6 terminals of the evaluation board, paying careful attention to polarity and supply voltage An ammeter may be placed between the input supply and the VIN terminal to the evaluation board. Ensure that the supply voltage is monitored at the VIN terminal. The ammeter and/or power lead resistance can reduce the voltage supplied to the input. Enabling the MIC2287. Apply a 1.5V or greater voltage source to the enable J3 terminal. LED Current Setting The LED current ILED is equal to the feedback voltage 95mV typical divided by the R1 resistance value. To increase the LED current, the R1 resistor value must be reduced. Conversely, to decrease the LED current the R1 resistor value must be increased. The LED current can be calculated as follows: ILED = 95mV R1 The evaluation board is preset for ~15mA of LED current. The evaluation board can easily be modified to yield the desired LED current by replacing the R1 resistor value. MLF and MicroLeadFrame are a registered trademark of Amkor Technology. Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 408 944-0800 • fax 1 408 474-1000 • May 2005 M9999-052005 408 955-1690 Micrel, Inc. MIC2287 MLF Evaluation Board J1 VIN C1 1µF J3 EN 10µH OVP 1 U1 MIC2287-15BML PGND 8 AGND 4 LED1 LED2 LED3 J4 VOUT C2 1µF J1 VIN C1 1µF J3 EN 10µH OVP 1 U1 MIC2287-34BML PGND 8 AGND 4 LED1 LED2 LED3 LED4 LED5 |
| More datasheets: CPC7581BB | CPC7581BA | CPC7581BC | CPC7581MBTR | CPC7581MCTR | CPC7581MATR | CPC7581BCTR | CPC7581BBTR | CPC7581BATR | MIC2287-6-LED-EV |
Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MIC2287-3-LED-EV Datasheet file may be downloaded here without warranties.