Powers 4 Main and 2 Sub-Display LEDs Average 85% Efficiency (PLED / PBATT) over Li+ Battery Discharge 1.5% LED Current Matching Adaptive 1x/1.5x Mode Switchover Low Input Ripple and EMI Individual 5% to 100% Brightness Single-Wire Serial Pulse Dimming 2.7V to 5.5V Supply Voltage Range Thin QFN 4mm x 4mm IC Package Fully Assembled and Tested
- Cell Phones with Main and Sub-Displays
- PDAs/Smartphones with Up to Six White LEDs
The MAX1575 evaluation kit (EV kit) is a fully assem-bled and tested circuit for evaluating the MAX1575 white LED 1x/1.5x charge pump. The MAX1575 drives 4 white LEDs in a main display group and 2 white LEDs in a sub-group. These 6 surface-mount white LEDs are included on the EV kit. In addition to the LED driver cir-cuit, the EV kit includes two pulse-generator circuits on the left side of the PC board that are used for testing the single-wire serial pulse-dimming feature of the MAX1575.