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EV0056のメーカーはMPSです、この部品の機能は「Fixed Frequency White LED Driver」です。 |
部品番号 | EV0056 |
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部品説明 | Fixed Frequency White LED Driver | ||
メーカ | MPS | ||
ロゴ | |||
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www.DataSheet4U.com
Monolithic Power Systems
General Description
The EV0056 evaluation board is designed for
backlights using white LEDs. It implements
MPS’ MP1518 fixed frequency step-up
converter.
The MP1518 is a 6 pin thin SOT23 step up
converter designed for driving up to 6 series
white LEDs from a single cell Lithium Ion
battery. The MP1518 uses current mode, fixed
frequency architecture to regulate the LED
current, which is measured through an external
current sense resistor. It’s low 100mV
feedback voltage reduces power loss and
improves efficiency. To prevent damage due
to an open circuit condition, the OV pin
monitors the output voltage and turns off the
converter if an over-voltage condition is
present.
The MP1518 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload. The MP1518 is available in a small 6
lead TSOT23 package.
Ordering Information
Board Number
EV0056
MPS IC Number
MP1518DJ
Figure 1: EV0056 Evaluation Board
EV0056
Fixed Frequency
White LED Driver
EVALUATION BOARD
Absolute Maximum Ratings
SW -0.5V to 28V
All Other Pins except OV
-0.3V to 6.5V
Recommended Operating Conditions
IN Supply Voltage
2.5V to 6V
Features
On Board Power MOSFET
Drives up to 6 Series White LEDs
Up to 86% Efficiency
Over 1MHz Fixed Switching Frequency
Open Load Shutdown
Low 100mV Feedback Voltage
Soft Start/PWM Dimming
UVLO, Thermal Shutdown
Internal Current Limit
Applications
Cell Phones
Handheld Computers and PDAs
Digital Still and Video Cameras
Small LCD Displays
Actual Size = 1.9”X x 1.8”Y
EV0056 1.0_08/01/03
Monolithic Power Systems, Inc.
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1 Page Monolithic Power Systems
EV0056
Fixed Frequency
White LED Driver
EVALUATION BOARD
Board Operation:
1. Solder LED1 – LED6 to board.
2. Connect positive and negative terminals of 2.5V to 6V power supply to VIN and GND pins
respectively.
3. Drive EN high to turn on the MP1518, drive EN low to shut down the MP1518.
4. To use burst-mode brightness control, drive EN with a PWM signal.
Figure 3: Top Silk Layer
Figure 4: Top Layer
Figure 5: Bottom Silk Layer
Figure 6: Bottom Layer
NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change
without notice. Please contact the factory for current specifications. No responsibility is assumed by MPS for its use or fit to
any application, nor for infringement of patent or other rights of third parties.
EV0056 Rev 1.0
08/01/03
© 2003 MPS, Inc.
Monolithic Power Systems, Inc.
983 University Ave, Building D, Los Gatos, CA 95032 USA
Tel: 408-395-2802 ♦ Fax: 408-395-2812 ♦ Web: www.monolithicpower.com
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3Pages | |||
ページ | 合計 : 3 ページ | ||
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PDF ダウンロード | [ EV0056 データシート.PDF ] |
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