The PAM2803 is a high-efficiency, constant current LED driver manufactured by Power Analog Microelectronics. It is designed for driving high-brightness LEDs (HBLEDs) in a variety of lighting applications.

Applications

• LED backlighting for LCD displays
• LED flashlights
• LED torches
• LED signage
• Automotive lighting (e.g., daytime running lights, rear lights)
• General LED lighting applications

Features

• Input Voltage Range: 2.7V to 6V
• Constant Current Output
• High Efficiency: Up to 90%
• Adjustable Output Current
• Overvoltage Protection
• Short Circuit Protection
• Thermal Shutdown Protection
• Small SOT-23-6 Package

Benefits

• High Efficiency: The high efficiency of the PAM2803 minimizes power consumption and extends battery life in portable applications.
• Constant Current: Provides a constant current to the LEDs, ensuring consistent brightness and long lifespan.
• Adjustable Output Current: The output current can be adjusted to match the requirements of different LEDs.
• Comprehensive Protection: Built-in overvoltage protection, short circuit protection, and thermal shutdown protection features protect the device and the LEDs from damage.
• Small Size: The compact SOT-23-6 package saves valuable board space.

Additional Details

The PAM2803 uses a PWM (Pulse Width Modulation) control scheme to achieve high efficiency. The output current can be adjusted by using an external resistor. The overvoltage protection is designed to prevent damage to the LEDs in case of an overvoltage condition. The short circuit protection protects the device from damage in case of a short circuit at the output. The thermal shutdown protection protects the IC from overheating by disabling the output when the junction temperature exceeds a certain threshold. It requires external components such as an inductor, capacitor, and resistor for proper operation. It's RoHS compliant. The integrated protections improve reliability in various lighting applications.