PAM2863ECR

PAM2863ECR 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. This device 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. 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 the ground. Applications include high-end LED flashlights, and LED light bars.

• Simple low parts count, internal 40V NDMOS switch, 2A output current
• Single pin on/off and brightness control using DC voltage or PWM
• Soft-start, high efficiency up to 97%, input voltage range from 4.5V to 40V
• Output shutdown, open LED protection, short LED protection
• Shutdown current is 20µA typical at (VSET pin grounded, TA = +25°C, VIN = 16V)
• Quiescent current without switching is 0.6mA typ at (VSET pin floating, VIN = 16V)
• Operating frequency is 233KHz typical at (TA = +25°C, VIN = 16V)
• Output current is 1A typical at (RS = 0.1ohm, TA = +25°C, VIN = 16V)
• Operating temperature range from -40°C to +85°C
• SO-8EP package