PAM2861

PAM2861 1A LED Driver with Internal Switch Features Description n Simple low parts count The PAM2861 is a continuous mode inductive n Internal 40V NDMOS switch step-down converter, designed for driving single n 1A output current or multiple series connected LEDs efficiently n Single pin on/off and brightness control from a voltage source higher than the LED Using DC voltage or PWM voltage. The device operates from an input n Soft-start supply between 6V and 40V and provides an n High efficiency (up to 95%) externally adjustable output current of up to 1A. n Wide input voltage range: 6V to 40V Depending upon supply voltage and external n Output shutdown components, this can provide up to 30 watts of n Up to 1MHz switching frequency output power. n Inherent open-circuit LED protection n Typical 5% output current accuracy n Pb-free SOT23-5, SOT89-5 and PSOP-8 Packages E TApplications H En Low voltage halogen replacement LEDs Sn Low voltage industrial lighting An LED back-up lighting A RY D ATn Illuminated signs The PAM2861 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Output current can be adjusted below the set value, by applying an external control signal to the VSET pin. The VSET pin will accept either a DC voltage or a PWM waveform. The soft-start time can be increased using an external capacitor from the VSET pin to ground. Applying a voltage of 0...