MPS EV1518DG-00A Manuel utilisateur

EV1518DG-00A

Fixed Frequency WLED Driver

Evaluation Board

EV1518DG-00A Rev. 1.2 www.MonolithicPower.com 1

10/17/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

The Future of Analog IC Technology

GENERAL DESCRIPTION

The EV1518DG-00A is an evaluation board for

the MP1518, a 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. Its

low 104mV feedback voltage reduces power

loss and improves efficiency. The OV pin

monitors the output voltage and turns off the

converter if an over-voltage condition is present

due to an open circuit condition.

The MP1518 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload.

ELECTRICAL SPECIFICATIONS

Parameter Symbol Value Units

Input Voltage VIN 2.5 – 6.0 V

# of WLEDs Up to 6

LED Current ILED 20 mA

FEATURES

•On Board Power MOSFET

•Drives up to 6 Series White LEDs

•Up to 87% Efficiency

•Over 1MHz Fixed Switching Frequency

•Open Load Shutdown

•Low 104mV Feedback Voltage

•Soft Start/PWM Dimming

•UVLO, Thermal Shutdown

•Internal Current Limit

APPLICATIONS

•Cell Phones

•Handheld Computers and PDAs

•Digital Still Cameras

•Small LCD Displays

“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic

Power Systems, Inc.

EV1518DG-00A EVALUATION BOARD

(L x W x H) 2.0” x 1.8” x 0.4”

(5.0cm x 4.5cm x 1.0cm)

Board Number MPS IC Number

EV1518DG-00A MP1518DG

EFFICIENCY (%)

5 101520

LED CURRENT (mA)

Efficiency vs

LED Current

6 LEDS

3 LEDS

VIN = 3.6V

4 LEDS

EV1518DG-00A – FIXED FREQUENCY WLED DRIVER EVALUATION BOARD

EV1518DG-00A Rev. 1.2 www.MonolithicPower.com 2

10/17/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

EVALUATION BOARD SCHEMATIC

VIN

GND

LED1

BAT54WS-7

LED2

LED3

LED4

LED5

LED6

MP1518

SWIN

GND

EV1518DG-00A BILL OF MATERIALS

Qty Ref Value Description Package Manufacturer Manufacturer P/N

1 C1 4.7µF

Ceramic Capacitor,

6.3V, X5R 0805 TDK C2012X5R0J475M

1 C2 0.22µF

Ceramic Capacitor, 50V,

X7R 1206 TDK C3216X7R1H224K

1 D1

Diode Schottky, 30V,

200mW SOD-323 Diodes Inc BAT54WS-7

1 L1 22µH 400mA SMD Sumida CDRH3D16-220NC

LED1, LED2,

LED3, LED4,

LED5, LED6

Not Stuffed

1 R1 100kΩResistor, 5% 0805 Panasonic ERJ-6GEYJ104V

1 R2 4.99ΩResistor, 1% 0805 Yageo 9C08052A4R99FKHFT

1 U1 White Led Driver QFN8

(2x2) MPS MP1518DG

EV1518DG-00A – FIXED FREQUENCY WLED DRIVER EVALUATION BOARD

NOTICE: The information in this document is subject to change without notice. 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.

EV1518DG-00A Rev. 1.2 www.MonolithicPower.com 3

10/17/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PRINTED CIRCUIT BOARD LAYOUT

Figure 1—Top Silk Layer Figure 2—Top Layer

Figure 3—Bottom Layer

QUICK START GUIDE

1. Solder LED1 – LED6 to board.

2. Connect the positive and negative terminals of the power supply (2.5V to 6V) to the VIN and

GND pins, respectively.

3. This board is set up for automatic startup. Pull EN low to shut down the MP1518.

4. To use burst mode brightness control, drive EN with a PWM signal.

Autres manuels MPS Carte mère

MPS

MPS EV6532-R-01A Manuel utilisateur

MPS

MPS EVBL2166-D-00A Manuel utilisateur

MPS

MPS EV2605DQ-00B Manuel utilisateur

MPS

MPS EVQ4488-U-00B Manuel utilisateur

MPS

MPS mEZDPD4506A Manuel utilisateur

MPS

MPS EV6001DN-00D Manuel utilisateur

MPS

MPS EV5920-5048-V-00A Manuel utilisateur

MPS

MPS EV28163-Q-00A Manuel utilisateur

MPS

MPS EVKT-MACOM Manuel utilisateur

MPS

MPS EV0030 Manuel utilisateur

MPS

MPS EV2690-R-00A Manuel utilisateur

MPS

MPS EV6539B-F-00A Manuel utilisateur

MPS

MPS EV6551-QB-00A Manuel utilisateur

MPS

MPS MP5416 Manuel utilisateur

MPS

MPS EVHR2000-S-00A Manuel utilisateur

MPS

MPS EVKT-MP8860 Manuel utilisateur

MPS

MPS MP2483 Manuel utilisateur

MPS

MPS MP2696A Guide de référence

MPS

MPS MP2760 Manuel utilisateur

MPS

MPS EV5480-C-00A Manuel utilisateur

MPS

MPS EV2483DQ-00C Manuel utilisateur

MPS

MPS EVKT6515 Manuel utilisateur

MPS

MPS EVQ6541A-QK-00A Manuel utilisateur

MPS

MPS MP2663 Manuel utilisateur

Manuels Carte mère populaires d'autres marques

DFI

DFI SD170 Manuel utilisateur

ASROCK

ASROCK ROMED8-2T Manuel utilisateur

Asus

Asus P2L97A Manuel utilisateur

Winmate

Winmate IC70 Manuel utilisateur

Asus

Asus MES-B Manuel utilisateur

Grantech

Grantech SYS8F377VGGA-3OMN Manuel utilisateur

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuel utilisateur

Gigabyte

Gigabyte GA-9IVDT Manuel utilisateur

Texas Instruments

Texas Instruments ADS8372EVM Manuel utilisateur

Commell

Commell MS-C73 Manuel utilisateur

IBT Technologies

IBT Technologies MB860 Manuel utilisateur

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuel utilisateur

Biostar

Biostar M7VIT Bravo Instructions d'utilisation et d'installation

Intel

Intel D33217CK Manuel utilisateur

Asus

Asus F1A55-M LX PLUS R2.0 Manuel utilisateur

EPC

EPC EPC9147C Manuel utilisateur

Asus

Asus EX-B760M-V5 D4 Manuel utilisateur

EPOX

EPOX MU-8KHA0010 Manuel utilisateur