EV0043 Datasheet, PDF (1/3 Pages) Monolithic Power Systems – 3A, 25V, 1.1MHz Step-Up Converter for WLED Applications

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⁾
V_IN
2.6 to 5.5 V
LED Current (Torch) I_OUT1
20
mA
LED Current (Flash) I_OUT2
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
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
MPS IC Number
MP1517DR
EV0043 (MP1517) Rev. 1.1
www.MonolithicPower.com
1
2/17/2005
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© 2005 MPS. All Rights Reserved.