Datasheet AL58221 (Diodes)

AL58221 12-CHANNEL RGB LED DRIVER Description Pin Assignments
The AL58221 is a 12-channel (R/G/B x 4), constant-current, Adaptive Pulse Density Modulation (APDM) LED driver which operates over a (3D Photo – Not to Scale) 3V~5.5V input voltage range. The device provides 12 open-drain constant-current sinking outputs that are rated to 24V and delivers up to 60mA of high-accuracy current to each string of LED. Each channel’s average output current can be individually programmable through a digital interface. The current at each output is set by three external current-setting resistors. The AL58221 features a 10MHz double-edge trigger data clock input to reduce EMI. It offers a 2-wire serial interface to send grayscale (3D Step file available upon request) data, control commands including 16/14/12/8-bit grayscale selection, grayscale clock frequency division selection, output polarity selection for high-power LED driving, output Trise and Tfall timing selection, (Top View – Not to Scale) current output waveform selection, and internal-latch function. The device provides an adaptive pulse density modulation method to REXT_C 1 24 GND increase the visual refresh rate up to 1000 Hz @ 16-bit grayscale. It REXT_B 2 23 VDD reduces flickers and provides output current bilateral processing for EMI reduction. REXT_A 3 22 NC OUTC[0] 4 21 OUTA[3] The AL58221 utilizes a clock duty recovery technique and pulse re- OUTB[0] 5 20 OUTB[3] AL58221 timing to support longer distance connection and multiple devices’ OUTA[0] 6 Thermal 19 OUTC[3] cascading applications. It also provides typical ±1% channel-to- Exposed OUTC[1] 7 18 OUTA[2] channel LED current accuracy. Additional features include a ±0.1% Pad regulated output current capability and fast output transient response. OUTB[1] 8 17 OUTB[2] OUTA[1] 9 16 OUTC[2] The AL58221 is available in the TSSOP-24EP (Type A1-B) package GCKI 10 15 GCKO and is specified over the -40°C to +85°C ambient temperature range. DCKI 11 14 DO DCKO 12 13 DI
Features
• TSSOP
-
24EP (Type A1-B) Input Voltage VDD: 3V to 5.5V • Constant Current Output Range • 3~60mA@5V • 3~35mA@3.3V
Applications
• 12 Constant-Current Sink (R/G/B x 4) Output Channels • RGB Output Current setting by 3 external resistors • Indoor and outdoor LED video displays • 24V Rated output channels for long LED strings • Architectural and decorative lighting • ±1% (typ.) LED Current accuracy between channels • Digital signage and billboard applications • ±2% (typ.) LED Current accuracy between devices • LCD display backlighting • 16 / 14 / 12 / 8-bit grayscale selection • Transportation signs • Grayscale clock source selection: internal or external • PWM or APDM control selection • Programmable Output Current Trise / Tfall time • Output Current Bilateral Processing for EMI reduction • Diagnosis and Protections • Built-in internal grayscale clock supports refresh rate >1000Hz@16-bit grayscale, >256KHz@8-bit grayscale • Internal Grayscale clock frequency selection for High-Power LED driving application (min. 33.6KHz) • 2-Wire Serial Interface (DI, DCKI) • 20Mbps (max.) ~ 140 Kbps(min.) data rate for EMI reduction data transfer • Cascaded capability (Max 1,030 devices) • Clock duty recovery for cascading applications • Schmitt trigger input •
Totally Lead-Free & Fully RoHS Compliant (Notes 1& 2)
•
Halogen and Antimony Free. “Green” Device (Note 3)
•
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. AL58221 1 of 26 April 2024 Document number: DS46476 Rev. 2 - 2
www.diodes.com
© 2024 Copyright Diodes Incorporated. All Rights Reserved.