General Description
The AL58263 is a 16-channel constant-current LED driver with
16-bit grayscale Adaptive Pulse Density Modulation (APDM) and
supports 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 3.3V to 5V input voltage range
(±10%), fast 30MHz DCK input, and provides 16 open-drain
constant-current sinking outputs that are rated to 15V and deliver
up to 55mA of high-accuracy current to each LED string. The
current at each output is programmable by an external current-
sensing resistor and can be adjusted by a 6-bit global current
control.
The AL58263 also supports compulsory error detection, where
the display image will not be affected as the intervals and
currents are small. Differing from error mode selections; the
specified diagnostic can be performed. Errors will be stored in the
shift register and can be read out from the DO pin. Moreover, the
threshold voltage for LED short detection can be selected to
comply with different LED string configurations. Sleep mode can
also efficiently lower the supply current in power-saving
applications.
The AL58263 is available in the TSSOP-24EP package and is
specified over the -40°C to +85°C ambient temperature range.
Notes:
1.
No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated's definitions of Halogen- and Antimony-free,
2.
"Green" and Lead-free.
Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br +
3.
Cl) and <1000ppm antimony compounds.
AL58263EV1 User Guide
Rev. 2
AL58263EV1 User Guide
16-CHANNEL LED DRIVER WITH 16-BIT APDM CONTROL
Applications
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Key Features
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Indoor and outdoor LED video displays
Variable message signs (VMS)
Dot matrix modules
LCD display backlighting
3.3~5V operating supply voltage (±10%)
2~55mA/5V, 2~35mA/3.3V output current range
15V rated output channels for long LED strings
±1.5% (typ.) LED current accuracy between channels
±3% (typ.) LED current accuracy between chips
±0.1% output current regulation capability
16-bit grayscale resolution with Adaptive Pulse Density
Modulation (APDM) control
Non-scramble waveform for high-power LED applications
Grayscale counter reset selection
Grayscale data synchronization selection
6-bit global current control: from 12.5% to 200%
Compulsory error detection includes LED open, LED short
output port leakage, output short-to-GND, output short-to-
power, and REXT short-to-GND
Compulsory error detection with 0.1mA
Short detection threshold voltage selection (2/3/4/4.5V)
Sleep mode to lower the supply current to 10μA (typ.)
Overtemperature warning
30MHz Clock frequency for data transfer
EMI reduction grayscale clock
External GCK watchdog
8KV ESD protection on current output pins
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. "Green" Device (Note 3)
An automotive-compliant part is available under a
separate datasheet (AL58263Q).
© 2024 Copyright Diodes Incorporated. All Rights Reserved
September 2024
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