Diodes Incorporated PAM2808BLBR

Overview

PAM2808BLBR from Diodes Incorporated is a 5W high-power HBLED driver IC with 1.5A constant-current output, low 0.1V feedback reference voltage, and integrated overtemperature shutdown at +150°C. It operates from 2.5V to 6.0V input, supports PWM dimming via the EN pin, and is stable with ≥4.7µF ceramic output capacitance - used in portable white LED flashlights requiring compact, battery-efficient illumination.

For engineers reviewing the PAM2808BLBR datasheet, PAM2808BLBR pinout, PAM2808BLBR application, or PAM2808BLBR equivalent, key selection criteria include its 0.1V FB threshold for precision current sensing, SO-8EP (Type B) thermal performance (θ_JA = 90°C/W), open-load LED protection, and compatibility with low-ESR ceramic capacitors in space-constrained handheld lighting designs.

Technical Context

The PAM2808BLBR is a linear constant-current LED driver with internal pass transistor and analog feedback control loop. Its 0.1V reference voltage enables accurate current regulation using small-value, low-power sense resistors (e.g., 0.067Ω for 1.5A), minimizing I²R loss and thermal stress.

It implements thermal shutdown at +150°C with +40°C hysteresis and open-load detection to prevent damage during LED disconnection. The EN pin accepts logic-level PWM signals (≥1.5V high, ≤0.3V low) for direct brightness control without external circuitry.

Key Specifications

Pinout & Package

Package: SO-8EP (Type B), thermally enhanced with exposed pad for improved heat dissipation (θ_JC = 11°C/W). Pin 1–8 follow standard SOP-8 footprint with NC pins at 1, 5, and 8.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar constant-current LED driver applications.

Compared with AL8862SP-13 and AP3606B-TRG1, the PAM2808BLBR uniquely balances 1.5A drive capability, 0.1V precision FB, open-load safety, and SO-8EP thermal performance - making it optimal for 5W handheld LED systems where simplicity, reliability, and battery efficiency are jointly critical.

Availability

PAM2808BLBR is available at Aetrix Electronics and suitable for portable flashlight systems, USB-powered LED lamps, emergency lighting modules, and industrial indicator panels requiring stable component supply, full traceability, and lifecycle continuity.

Supply support for PAM2808BLBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The PAM2808 belongs to Diodes' high-brightness LED driver product line, engineered specifically for compact, battery-operated lighting applications demanding precise constant-current regulation, low quiescent power, and integrated safety features.

FAQ

What is the minimum sense resistor value supported for 1.5A output?

The PAM2808BLBR's 0.1V feedback reference allows a minimum sense resistor of 0.067Ω (0.1V ÷ 1.5A), resulting in only 150mW power dissipation. This value is confirmed in the Electrical Characteristics table under "RS = 0.067Ω" yielding 1500mA typical output current. Lower values risk violating the FB pin's absolute maximum rating or measurement accuracy.

Can the PAM2808BLBR drive multiple parallel LED strings?

No - the PAM2808BLBR is designed for single-string constant-current operation. Driving parallel LEDs without individual current balancing risks thermal runaway due to V_F mismatch. For multi-string configurations, separate PAM2808BLBR units or a switching controller with channel-matched current sinks are required per string.

Is the exposed pad on the SO-8EP (Type B) package electrically connected?

Yes - the exposed pad is internally connected to GND and must be soldered to a PCB thermal pad tied to system ground. This connection is essential for both electrical noise suppression and thermal performance (θ_JC = 11°C/W); floating or insulated pads degrade thermal resistance by >40% and may cause instability or premature shutdown.

Does the PAM2808BLBR support analog dimming via the FB pin?

No - analog dimming is not supported. The FB pin is a high-impedance reference input for current-sense feedback only. Dimming is implemented exclusively via PWM applied to the EN pin, as specified in the Application Information section. Attempting voltage injection into FB violates absolute maximum ratings and may damage the device.