Datasheet AL58263 (Diodes)

AL58263 16-CHANNEL, 16-BIT GRAYSCALE PWM DIMMING LED DRIVER Description Pin Assignments
The AL58263 is a 16-channel constant-current LED driver with 16-bit grayscale Adaptive Pulse Density Modulation (APDM) and supports (3D Photo – Not to Scale) error diagnostics, power-saving functionality, and current gain control. This distinctive APDM technology abates the non-ideal IOUT distortion due to non-symmetric transient responses and enhances the refresh rate by efficiently separating the frame waveform. The device operates over a 3V to 5.5V input voltage range, 15V output channel voltage, fast 25MHz DCK input, and delivers up to (3D Step file available upon request) 55mA of high-accuracy current to each LED string. Each channel’s output current can be programmable through a digital interface (Top View – Not to Scale) individually. All channels’ output current can be set by one external sensing resistor, along with a 6-bit global current control register. GND 1 24 VDD The AL58263 has built-in diagnostics and LED open/short protection, DI 2 23 REXT including error detection. These error results are stored in a register DCK 3 22 DO for the MCU to read out. LAT 4 21 GCK The AL58263 is available in the TSSOP-24EP (Type A1-B) package OUT0 5 20 OUT15 AL58263 and specified over the -40°C to +85°C ambient temperature range. OUT1 6 Thermal 19 OUT14 Exposed OUT2 7 18 OUT13 Pad
Features
OUT3 8 17 OUT12 OUT4 9 16 OUT11 • Input Voltage VDD: 3V to 5.5V OUT5 10 15 OUT10 • Output Current Range OUT6 11 14 OUT9 • 2~55mA/5V, 2~35mA/3.3V OUT7 12 13 OUT8 • ±0.1% Output current regulation capability • 6-bit global current control: from 12.5% to 200% • 16 Constant-Current Sink Output Channel TSSOP-24EP (Type A1-B) • 16-bit grayscale resolution with Adaptive Pulse Density Modulation control • 15V rated output channels for long LED strings
Applications
• Fast Transient Response – supports external grayscale clock with double edge up to 16MHz • Indoor and outdoor LED video displays • ±1.5% (typ.) LED Current accuracy between channels • Variable message signs (VMS) • ±3% (typ.) LED Current accuracy between chips • Traffic signs • Non-scramble waveform for high power LED application • Outdoor billboard signage • Grayscale counter reset selection • LCD display backlighting • Grayscale data synchronization selection • Diagnosis and Protections • Error detection includes LED Open, LED Short, Output port leakage, Output short-to-GND, Output short-to-Power and REXT short-to-GND • Error detection LEDs on at 0.1mA to avoid any flickering • Short detection threshold voltage selection (2/3/4/4.5V) • Sleep and 0-data mode to lower down the supply current • Pre-overtemperature warning • 4-Wire Serial Interface (LAT, DI, DO, DCK) • 25MHz clock frequency for data transfer • EMI reduction grayscale clock • Cascaded capability (Max 1,440 devices) • External GCK watchdog • Stagger outputs delay for EMI reduction •
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
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Halogen and Antimony Free. “Green” Device (Note 3)
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For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AL58263 1 of 28 April 2024 Document number: DS46310 Rev. 2 - 2
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