DIODES AL58263EV1 16-Channel LED Driver User Guide

AL58263EV1 User Guide
16-Channel LED Driver With 16-bit APDM Control 

Description

The AL58263 is a 16-channel constant current LED driver with 16-bit grayscale Adaptive Pulse Density Modulation (APDM), supports error diagnostics, power saving function 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 separating efficiently the frame waveform.
The device operates over a 3V to 5.5V input voltage range, 15V output channel voltage, a fast 25MHz data clock (DCK) serial input, delivers up to 55mA of high accuracy current to each string of LED. Each channel output current can be programmable thru digital interface individually. All channels output current could be set by one external sensing resistor along with 6-bit global current control register.
The AL58263 has built-in diagnosis and LED open/short protection and error detection, those errors results are stored in register for MCU to read out.
The AL58263 is available in the TSSOP-24EP (Type A1-B) package and specified over the -40°C to +85°C ambient temperature range.

Applications

• Indoor and Outdoor LED Video Displays
• Variable Message Sign (VMS)
• Traffic Sign
• Outdoor Billboard Signage
• LCD Display Backlighting

Features

• Input Voltage VDD: 3V to 5.5V
• Output Current Range
  • 2~55mA/5V, 2~35mA/3.3V
  • ±0.1% Output current regulation capability
  • 6-bit global current control: from 12.5% to 200%
• 16 Constant-Current Sink Output Channel
  • 16-bit grayscale resolution with Adaptive Pulse
  • Density Modulation control
  • 15V Rated output channels for long LED strings
  • Fast Transient Response – supports external grayscale clock with double edge up to 16MHz
  • ±1.5% (typical) LED Current accuracy between channels
  • ±3% (typical) LED Current accuracy between chips
  • Non-scramble waveform for high power LED application
  • Grayscale counter reset selection
  • 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-Over-temperature 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)
• Halogen and Antimony Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e. parts qualified to AECQ100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Hardware Description

The AL58263 evaluation board as shown in Figure 1 and Figure 2:

Power Supply Options
The device features two power supply options:

1. Utilizing six AAA dry batteries for portable convenience.
2. Connecting the ARDUINO control board via the USB interface (type C) to serve as the power source.

Note: The two power supply methods cannot be used simultaneously.
Low Voltage Warning
In the event of insufficient voltage from the connected batteries (total voltage in series ranging from 6V to 7V), the “LED Fault Location (Status) Display Area” will present the BCD code of the total series voltage. This BCD code includes the tens digit of the voltage (LED1-4), the units digit of the voltage (LED5-8), the first decimal digit of the voltage (LED9-12), and the second decimal digit of the voltage (LED13-16).

Quick Start Guide

1 Scrolling Mode
1.1 Activate Scrolling Mode by connecting batteries, plugging in the ARDUINO control board to the USB interface for power, or pressing the Reset button.
1.2 Scrolling Mode showcases LEDs (D1~D16) gradually brightening and dimming.

2 LED Open Circuit Detection Mode
2.1 Enter LED Open Circuit Detection Mode during Scrolling Mode by long- pressing SW14 for over 1 second.
2.2 Set a specific LED as an open circuit by toggling the “LED Open Circuit Setting SW1/SW3” to the OFF position, the corresponding LED lights up.
2.3 Press and hold SW14 for more than 1 second returns to Scrolling Mode.

3 LED Short Circuit Detection Mode
3.1 Enter LED Short Circuit Detection Mode during Scrolling Mode by long- pressing SW13 for over 1 second.
3.2 Set a specific LED as a short circuit by toggling the “LED short Circuit Setting SW2/SW4” to the ON position, the corresponding LED lights up.
3.3 Press and hold SW13 for more than 1 second returns to Scrolling Mode.

4 LED Smart Detection Mode
4.1 Enter LED Smart Detection Mode during Scrolling Mode by long-pressing SW12 for over 1 second.
4.2 Set a specific LED as an open circuit by toggling the “LED Open Circuit Setting SW1/SW3” to the OFF position or as a short circuit by toggling the “LED short Circuit Setting SW2/ SW4” to the ON position, the corresponding LED lights up.
4.3 Press and hold SW12 for more than 1 second returns to Scrolling Mode.

5 Sleep Mode
5.1 Enter Sleep Mode during Scrolling Mode by long-pressing SW11 for over 1 second.
5.2 Press and hold SW11 for more than 1 second returns to Scrolling Mode.

6 Rext Short Circuit Detection Mode
6.1 Enter Rext Short Circuit Detection Mode by long-pressing SW10 for over 1 second.
6.2 Toggle the “Rext Short to Ground Setting Switch” to ON to set Rext short to ground.
6.3 When Rext is shorted to ground, LED 1 will flicker at a one-second frequency.
6.4 Press and hold SW10 for more than 1 second returns to Scrolling Mode.

Evaluation Board Schematic

Evaluation Board Layout

Bill of Materials

Location| Description| Manufacturer| Part Number| Package
---|---|---|---|---
U1, U2| 16-Channel LED Driver With 16- bit APDM Control| Diodes Incorporated (Diodes)| AL58263Q| TSSOP-24EP
BT1, BT2, BT3| Battery Holder| MYOUNG| BH-AAA-B5AA001| –
C9| Capacitor SMD, 10pF/10V X7R| Samsung Electro-Mechanics| CL21B106KPQNNNE| 805
C1, C2, C3, C4, C5, C6, C7, C8, C11| Capacitor SMD, 0.1pF/50V X7R| Murata| GRM21BR71H104KAO1L| 805
D33| Schottky Barrier Rectifiers: 40VDC/IF = 3A| Diodes| B340AQ| SMA
D1 — D32| Red LED SMD, Forward Current = 40mA| XINGLIGHT| XL-2835SURC-02| SMD2835
R33| Resistor SMD, 00 1%, 1/8 W| YAGEO| AC0805FR-070RL| 805
R34, R35, R37| Resistor SMD, 2k0 1%, 1/8 W| YAGEO| AC0805FR-072KL| 805
R1—R32| Resistor SMD, 470 1%, 1/8 W| YAGEO| AC0805JR-0747RL| 805
R36, R38—R50| Resistor SMD, 10k0 1%, 1/8 W| YAGEO| AF0805FR-0710KL| 805
SW1-5W4| Button Switch| KINGTEK| DSHP08TSGER| DIP-8
SW5| Button Switch| KINGTEK| DSHP06TS-S| DIP-6
SW6-5W8| Button Switch, SMD, SW SPST SKQG| SHOU HAN| MST22D18G2| SMD 3.6 x 9.1
SW9—SW14| Button Switch| XKB Connection| TS-1187A-C-C-B| DIP-6

System Performance

1. Global Current Control（VDD = 5.5V）
2. Turn ON/OFF Waveform

IMPORTANT NOTICE

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2. The Information contained herein is for informational purpose only and is provided only to illustrate the operation of Diodes’ products described herein and application examples. Diodes does not assume any liability arising out of the application or use of this document or any product described herein. This document is intended for skilled and technically trained engineering customers and users who design with Diodes’ products. Diodes’ products may be used to facilitate safety-related applications; however, in all instances customers and users are responsible for (a) selecting the appropriate Diodes products for their applications, (b) evaluating the suitability of Diodes’ products for their intended applications, (c) ensuring their applications, which incorporate Diodes’ products, comply the applicable legal and regulatory requirements as well as safety and functional-safety related standards, and (d) ensuring they design with appropriate safeguards (including testing, validation, quality control techniques, redundancy, malfunction prevention, and appropriate treatment for aging degradation) to minimize the risks associated with their applications.
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Issue 1
AL58263EV1 User Guide
www.diodes.com
April 2024
© 2024 Copyright Diodes Incorporated.
All Rights Reserved.

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