IC launched APW7209 power management can drive 2~10 white LED

APW7209 is a fixed 1MHz switching frequency, the current control mode DC/DC boost device, built-in N switch can drive 10 series of white LED. and APW7209 operation between 2.5V to 6V input voltage range, suitable for use in a single lithium battery powered, 1MHz switching frequency can effectively reduce the external inductance and capacitance the volume of the built-in 40V overvoltage protection function, which can avoid the load contact with air and unexpected pressure.

Maximum efficiency of up to 88%, the internal 0.3V reference voltage, as the LED current limiting can get the highest efficiency, and extend battery life. Finally, the use of SOT-23-6 APW7209 packaging to save space on the board a great help.

Source: electronic products in the world