Catalog
12-Channel LED Driver with 12-bit APDM Control
Key Features
• Input Voltage VDD: 3V to 5.5V
• Constant Current Output Range3~60mA@5V3~35mA@3.3V
• 3~60mA@5V
• 3~35mA@3.3V
• 12 Constant-Current Sink (R/G/B x 4) Output ChannelsRGB Output Current setting by 3 external resistors24V Rated output channels for long LED strings±1% (typ.) LED Current accuracy between channels±2% (typ.) LED Current accuracy between devices16 / 14 / 12 / 8-bit grayscale selectionGrayscale clock source selection: internal or externalPWM or APDM control selectionProgrammable Output Current Trise / Tfall timeOutput Current Bilateral Processing for EMI reduction
• RGB Output Current setting by 3 external resistors
• 24V Rated output channels for long LED strings
• ±1% (typ.) LED Current accuracy between channels
• ±2% (typ.) LED Current accuracy between devices
• 16 / 14 / 12 / 8-bit grayscale selection
• 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 ProtectionsBuilt-in internal grayscale clock supports refresh rate >1000Hz@16-bit grayscale, >256KHz@8-bit grayscaleInternal Grayscale clock frequency selection for High-Power LED driving application (min. 33.6KHz)
• 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 transferCascaded capability (Max 1,030 devices)Clock duty recovery for cascading applicationsSchmitt trigger input
• 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), pleasecontact usor your local Diodes representative.https://www.diodes.com/quality/product-definitions/
Description
AI
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.