AL58221T24E-13

Overview

The AL58221T24E-13 is a 12-channel RGB LED linear driver IC manufactured by Diodes Incorporated. It operates with an input voltage range of 3 V to 5.5 V and supports a maximum output voltage of 24 V. The device features 12 constant current outputs, each capable of delivering up to 62 mA, with a total high-level output current capacity of 4.6 A. It utilizes Adaptive Pulse Density Modulation (APDM) for control and supports PWM dimming via a two-wire interface. The component functions at a working frequency of 10 MHz and is housed in a TSSOP-24EP package. It is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates 12 independent constant current channels designed specifically for RGB LED applications.
• Employs Adaptive Pulse Density Modulation (APDM) technology for efficient LED control.
• Supports digital dimming through a standard two-wire serial interface using PWM signals.

Applications

• RGB LED lighting systems requiring precise color mixing
• LED display backlights utilizing shift register architectures
• General-purpose LED illumination drivers

Procurement Notes

Verify the specific suffix 'T24E-13' to confirm the TSSOP-24EP package type and tape-and-reel quantity of 2500 units. Ensure compatibility with the required 3 V to 5.5 V supply rails and check that the 62 mA per channel current rating meets the target LED specifications. Confirm RoHS compliance status as indicated in official documentation before finalizing procurement.

Selection Notes

Select this component when a multi-channel solution for RGB LEDs is required within a low-voltage system. The integrated APDM feature offers efficiency advantages over traditional PWM methods. Consider the 4.6 A total current limit when designing thermal management for the PCB. The TSSOP-24EP package provides exposed pad thermal dissipation capabilities suitable for dense layouts.

Part Context

This part belongs to the AL58221 family of LED drivers from Diodes Incorporated. It is distinct from audio amplifiers like the PAM8823, which share similar packaging but serve different signal types. The AL58221 series focuses on linear driving for lighting applications rather than power amplification or general logic functions.

Replacement Considerations

Consult official Diodes Incorporated substitution guides for verified equivalents. Generic cross-references may not match the specific APDM control scheme or pinout configuration of the TSSOP-24EP variant.

FAQ

What control method does the AL58221T24E-13 use?

It uses Adaptive Pulse Density Modulation (APDM) combined with PWM dimming via a two-wire serial interface.

What is the maximum current per channel?

Each of the 12 channels can deliver a constant current of up to 62 mA.