9 Lamp, 36V Precision White LED Driver
The Future of Analog IC Technology TM
The MP1528 is a step-up converter designed
for driving up to nine (9) series White LEDs
(LED) from a single cell Lithium-Ion battery. It
regulates the LED current and includes an
analog input for varying the LED brightness.
The MP1528 uses current limited, variable
frequency architecture to regulate the LED
current while maintaining high efficiency. The
BIAS pin measures the output voltage and turns
off the converter if an over voltage condition is
present to prevent damage due to an open
circuit condition. The LED current is measured
with an external current sense resistor. The low
0.4V full-scale regulation threshold and 0.63Ω
power switch minimize power loss.
The MP1528 is available in an 8 pin MSOP and
a tiny 6 pin 3mm x 3mm QFN packages.
EVALUATION BOARD REFERENCE
2.0” x 1.5” x 0.5”
• Drives up to 9 Series White LEDs
• Integrated 0.63Ω Power MOSFET
• Low 0.4V Full-Scale Current Sense Threshold
• Over 20mA Output Current Capacity
• Analog and Digital PWM Brightness Control
• Open Load Shutdown
• Internal Current Limit
• Under Voltage Lockout
• Thermal Shutdown
• Available in 8-Pin MSOP and Tiny 3mm x 3mm
6-Pin QFN Packages
• Handheld Computers
• PDA Phones
• Digital and Video Cameras
• Small LCD Displays
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
VIN = 12V
90 7 LEDs
60 9 LEDs
5 10 15 20 25 30 35
LED CURRENT (mA)
MP1528 Rev. 1.7
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.