EV0043 (MP1517)

3A, 25V, 1.1MHz

Step-Up Converter for WLED Applications

EVALUATION BOARD

EV0043 (MP1517) Rev. 1.1

www.MonolithicPower.com

1

2/17/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The EV1517 is the evaluation board used to

demonstrate the white LED driver capabilities of

the MP1517. The low 0.7V feedback voltage

offers higher efficiency in white LED driver

applications including cell phone camera flash.

Soft-start, cycle-by-cycle current limiting and

input

under

voltage

lockout

prevent

overstressing or damage to sensitive external

circuitry at startup and output short-circuit

conditions.

Current-mode

regulation

and

external compensation components allow the

MP1517 control loop to be optimized over a

wide variety of input voltages, output voltages

and load current conditions.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Input Voltage

(1)

2.6 to 5.5

V

LED Current (Torch)

20

mA

LED Current (Flash)

150

mA

Note:

1) 5.5V input voltage limit is specific to the application circuit on this

evaluation board. The input voltage limit of the MP1517 is 25V.

FEATURES

• 4A Peak Current Limit

• Low 700mV Feedback Threshold

• Internal 150mΩ Power Switch

• Input Range of 2.6V to 25V

• 95% Efficiency

• Zero Current Shutdown Mode

• Under Voltage Lockout Protection

• Open Load Protection

• Soft-Start Operation

• Thermal Shutdown

• Tiny QFN16 (4mm x 4mm) Package

APPLICATIONS

• Boost and SEPIC Regulators

• Handheld Computers

• Cell Phone Camera Flash, PDAs

• Digital Still and Video Cameras

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

Monolithic Power Systems, Inc.

EV0043 EVALUATION BOARD

Dimensions (2.5”X x 2.0”Y x 0.4”Z)

Board Number

MPS IC Number

EV0043

MP1517DR

2V/div.

10V/div.

20ms/div.

EV0043_TPC01

Waveform in Flash Mode