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EV0043

3A, 25V, 1.1MHz Step-Up Converter for WLED Applications

Monolithic Power Systems 

The Future of Analog IC Technology

EV0043 (MP1517)

3A, 25V, 1.1MHz

Step-Up Converter for WLED Applications

EVALUATION BOARD

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)

VIN

2.6 to 5.5 V

LED Current (Torch) IOUT1

20

mA

LED Current (Flash) IOUT2

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

Waveform in Flash Mode

VGATE

2V/div.

VOUT

10V/div.

20ms/div.

EV0043_TPC01

Dimensions (2.5”X x 2.0”Y x 0.4”Z)

Board Number

EV0043

MPS IC Number

MP1517DR

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.

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