The MP1528 is a step-up converter digned for driving up to nine (9) seri White LEDs (LED) from a single cell Lithium-Ion battery. It regulat the LED current and includ an og input for varying the LED brightns. The MP1528 us current limited, variable frequency architecture to regulate the LED current while maintaining high efficiency. The BIAS pin measur the output voltage and turns off the converter if an over voltage condition is prent to prevent damage due to an open circuit condition. The LED current is measured with an external current sense ristor. The low 0.4V full-scale regulation thrhold and 0.63Ω power switch minimize power loss. The MP1528 is available in an 8-pin MSOP, an 8-pin 2mm x 2mm QFN and a 6-pin 3mm x 3mm QFN packag.
FEATUR
• Driv up to 9 Seri White LEDs
• Integrated 0.63Ω Power MOSFET
• Low 0.4V Full-Scale Current Sense Thrhold
• Over 20mA Output Current Capacity
• og and Dial PWM Brightns Control
• Open Load Shutdown
• Soft-Start
• Internal Current Limit
• Under Voltage Lockout
• Thermal Shutdown
• Available in 8-Pin MSOP, 8-pin 2mm x 2mm QFN and 6-Pin 3mm x 3mm QFN Packag
APPLICATIONS
• Handheld Computers
• PDAs
• PDA Phon
• Dial and Video Cameras
• all LCD Displays