EV0043 (MP1517)
3A, 25V, 1.1MHz
Step-Up Converter for WLED Applications
The Future of Analog IC Technology
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.
FEATURES
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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
Boost and SEPIC Regulators
Handheld Computers
Cell Phone Camera Flash, PDAs
Digital Still and Video Cameras
APPLICATIONS
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
(1)
LED Current (Torch)
LED Current (Flash)
Symbol
V
IN
I
OUT1
I
OUT2
Value
2.6 to 5.5
20
150
Units
V
mA
mA
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
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.
EV0043 EVALUATION BOARD
Waveform in Flash Mode
V
GATE
2V/div.
V
OUT
10V/div.
20ms/div.
EV0043_TPC01
Dimensions (2.5”X x 2.0”Y x 0.4”Z)
Board Number
EV0043
EV0043 (MP1517) Rev. 1.1
2/17/2005
MPS IC Number
MP1517DR
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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