MP1528 20mA Precision White LED Driver QFN6

MP1528 20mA Precision White LED Driver QFN6

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.

Key Specifications

Features

• 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
• Soft-Start
• Internal Current Limit
• Under Voltage Lockout
• Thermal Shutdown

Typical Application Circuit

Applications

• Handheld Computers
• PDA Phones
• Digital and Video Cameras
• Small LCD Displays "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.

Design Notes

• Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
• In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
• Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
• Size the inductor and output capacitor for the string current ripple, not the total LED current.

Common Questions