RT9271白光LED电源芯片应用电路

RT9271白光LED芯片应用电路
  The RT9271 is a step-up DC/DC converter specifically
  designed to drive white LEDs with a constant current.
  The device can drive one to three LEDs in series from a
  Li-Ion cell. Series connection of the LEDs provides
  identical LED currents resulting in uniform brightness and
  eliminating the need for ballast resistors. The RT9271
  switches at 1.1 MHz, allowing the use of tiny external
  components. The input and output capacitor can be as
  small as 1uF, saving space and cost versus alternative
  solutions. A low 0.25V feedback voltage minimizes power
  loss in the current setting resistor for better efficiency.
  The RT9271 is available in low profile SOT-26 package.