Product Summary

The PAM2863 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The PAM2863 operates from an input supply between 4.5V and 40V and provides an externally adjustable output current of up to 2A. Depending upon supply voltage and external components, this can provide up to 30 watts of output power. The PAM2863 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. The PAM2863 applications are: (1)High End LED Flashlight;(2)LED Light Bar.

Parametrics

PAM2863 absolute maximum ratings: (1)Input Voltage Range: －0.3 to +40 V; (2)LX, ISENSE Pin Voltage: －0.3 to +40 V; (3)VSET Pin Voltage: －0.3 to +6.0 V; (4)Maximum Junction Temperature: 170 ℃; (5)Storage Temperature: －65 to +170 ℃.

Features

PAM2863 features: (1)2A Output Current; (2)Single Pin On/Off and Brightness Control Using DC Voltage or PWM; (3)Soft Start; (4)High Efficiency (up to 97%); (5)Wide Input Voltage Range: 4.5V to 40V; (6)Output Shutdown; (7)Open LED Protection; (8)Short LED Protection; (9)Up to 1MHz Switching Frequency; (10)Typical 5% Output Current Accuracy; (11)Pb-Free SOP-8(EP)Packages.

Diagrams

PAM2863 pin connection