MAX1583

19-3246; Rev 0; 4/04 www.DataSheet4U.com MAX1583 Evaluation Kit General Description The MAX1583 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board for evaluating the MAX1583 white LED flash boost converter. The EV kit accepts a 2.6V to 5.5V input voltage and drives up to five series white LEDs with a constant current to provide camera flash/strobe in cell phones, PDAs, DSCs, and other hand-held devices. The MAX1583 switching frequency is 1MHz, allowing tiny external components. Two logic inputs control four modes of operation: shutdown mode (0.5µA max), movie mode for high-efficiency continuous lighting (programmable up to 100mA), precharge mode for charging a reservoir capacitor to 24V while the LEDs are off (POK output indicates a full reservoir capacitor), and strobe mode for firing the flash during an exposure with a regulated current programmable up to 300mA (100mA with installed components). A pushbutton pulse generator is installed to simulate a 30ms flash pulse. The MAX1583 comes with the MAX1583X (1A current limit) installed, but the entire MAX1583 family can be evaluated with this EV kit with minor component changes. Features ♦ Supports Up to 5 LEDs for Strobe/Flash ♦ Four Operational Modes Strobe: Up to 300mA (Preset to 100mA) Precharge: With POK Indicator Movie: Up to 100mA (Preset to 20mA) Shutdown: 0.01µA (typ) Quiescent Current ♦ Input Current Limiting 1A (MAX1583X) 500mA (MAX1583Y) 250mA (MAX1583Z) ♦ 24V Output Overvoltage P...