Diodes Incorporated AL58263T24E-13

Overview

AL58263T24E-13 from Diodes Incorporated is a 16-channel, 16-bit PWM dimming constant-current LED driver with Adaptive Pulse Density Modulation (APDM), ±0.1% output current regulation, 15V channel voltage rating, and integrated LED open/short diagnostics. It delivers up to 55mA per channel at 5V supply and supports fast 25MHz serial data transfer for high-resolution indoor/outdoor LED video displays.

For engineers reviewing the AL58263T24E-13 datasheet, AL58263T24E-13 pinout, AL58263T24E-13 application, or AL58263T24E-13 equivalent, key selection criteria include APDM-based grayscale fidelity, channel-to-channel current matching (±1.5% typ.), thermal alarm threshold (+155°C), 4-wire serial interface timing, and REXT-based current scaling across 2–55mA range.

Technical Context

The AL58263 implements a 272-bit shift register feeding sixteen independent 16-bit APDM generators with Δ-width correction, enabling non-scrambled waveform generation for high-power LED strings. Its dual-edge grayscale clock (GCK) accepts up to 16MHz input to halve required clock frequency versus conventional PWM while maintaining 65536-step resolution.

Functional block integration includes error detection logic for LED open/short, output short-to-GND/power, REXT short-to-GND, and leakage-each stored in dedicated status registers readable via DO pin. Global current control (GCC) uses 6-bit DAC (12.5–200% gain) with HC/DA[4:0] encoding to scale all channels simultaneously without altering grayscale data.

Key Specifications

Pinout & Package

TSSOP-24EP (Type A1-B) package with exposed thermal pad; 24-pin surface-mount footprint optimized for thermal dissipation in high-current LED driver applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-channel LED driver applications.

Compared with AL58263Q, the AL58263T24E-13 omits automotive qualification overhead but retains full functionality for industrial signage; versus MY9262, it adds APDM-based waveform fidelity, built-in diagnostics, and tighter current matching-justifying its use where display quality and field reliability are prioritized.

Availability

AL58263T24E-13 is available at Aetrix Electronics and suitable for indoor LED video displays, outdoor variable message signs, and traffic signal modules requiring stable component supply across multi-year production cycles.

Supply support for AL58263T24E-13 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and LED lighting applications.

The AL58263 belongs to Diodes' high-precision LED driver product line, engineered specifically for large-format, high-reliability signage and display systems demanding advanced dimming fidelity and robust fault handling.

FAQ

What is the maximum number of AL58263T24E-13 devices that can be cascaded?

Up to 1,440 AL58263T24E-13 devices can be daisy-chained using the DO-to-DI connection method. This architecture supports massive LED arrays such as stadium video walls, where synchronized grayscale updates across thousands of channels are required without timing skew.

How does Adaptive Pulse Density Modulation (APDM) differ from standard PWM in the AL58263T24E-13?

APDM separates frame waveform generation from transient response compensation, eliminating non-symmetric distortion caused by LED driver switching delays. Unlike standard PWM-which triggers only on rising edges-APDM uses double-edge GCK triggering to halve required clock frequency while preserving 16-bit resolution and reducing EMI.

Can the AL58263T24E-13 drive LEDs with forward voltages exceeding 15V?

No. The AL58263T24E-13 has a maximum rated output voltage of 15V per channel. Driving LED strings with total V_F >15V risks violating absolute maximum ratings and may cause premature failure. For higher-voltage strings, a boost converter stage or alternative driver with ≥20V rating is required.

What diagnostic errors does the AL58263T24E-13 detect and how are they reported?

The AL58263T24E-13 detects six error conditions: LED open, LED short, output port leakage, output short-to-GND, output short-to-power, and REXT short-to-GND. Each condition sets a dedicated bit in the error status register, readable via the DO pin during read-back mode using the "Reading Image Data and Command Data" instruction.