DESCRIPTION
The EV0022 evaluation board uses the MP1522 to drive up to six (6) series white LEDs from a single cell Lithium Ion battery. The MP1522 uses a current limited, variable frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its 1.23V, 3% feedback threshold improves the LED current regulation. The BIAS pin can measure the output voltage and turn off the converter to prevent damage in an open circuit condition.

FEATURES
• Internal 0.5Ω Power Switch
• Output Voltage up to 25V
• Up to 90% Efficiency
• Low 1µA Shutdown Current
• Input Under-Voltage Protection
• Thermal Shutdown
• Internal Current Limit

APPLICATIONS
• Handheld Computers, PDAs
• Cell Phones
• Digital Still and Video Cameras
• Small LCD Displays