资 源 简 介
The ZD1937 is a constant frequency, current mode PWM,inductor based step-up (boost) converter especially designedto drive mulTIple white LED’s in series. The LED current isregulated in this converter design so that all LED’s have thesame current and therefore have inherently matched lightoutput. The converter design operates at high frequency(1.2MHz) operaTIon so that a small, low profi le inductor canbe used as well a small value output integraTIng capacitor.The ZD1937 has built-in over-voltage protecTIon (OVP) withinternal thermal shutdown ability to prevent device from overvoltageor an open circuit condition at the voltage output.The ZD1937 is available in either a space saving SC70, aSOT25, or ThinSOT25 package for very small board spaceapplications.
