Datasheet Diodes AL58221 — 数据表

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
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. (3D Photo – Not to Scale) The AL58221 features a 10MHz double-edge trigger data clock input
to reduce EMI. It offers a 2-wire serial interface to send grayscale
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,
current output waveform selection, and internal-latch function. (3D Step file available upon request)
(Top View – Not to Scale) The device provides an adaptive pulse density modulation method to
increase the visual refresh rate up to 1000 Hz @ 16-bit grayscale. It
reduces flickers and provides output current bilateral processing for
EMI reduction. REXT_C
REXT_B
REXT_A
OUTC[0]
OUTB[0]
OUTA[0] …