Diodes Incorporated AL5887 | Demoboard AL5887EV2

Beschreibung

The AL5887/AL5887Q, AL58818/AL58818Q, andAL58812/AL58812Q are comprised of 36/18/12 programmableLED current channels each with internal 12-bit PWM for colorand brightness control through SPI or I2C digital interfaces.The devices are ideal for up to 12/6/4 RGB LED-modulelighting applications, and have three programmable banks (A,B, C) for software control of each color. An external resistorcan set up the global output current of all 36/18/12 channels.Each channel current can digitally be configured up to 70mAunder the thermal limitation of the package.Features of the AL5887/AL5887Q, AL58818/AL58818Q, andAL58812/AL58812Q are controlled via the SPI/I2C digitalinterface. A dedicated pin, INT_SEL, selects either the SPI orI2C protocols. The devices have a 30kHz, 12-bit PWMgenerator for each channel, as well as channel/moduleindependent color-mixing and brightness-control registers toenable vivid LED effects with zero audible noise. Users canbenefit from these devices’ ultra-low shutdown IQ PowerSaving Mode and easy software programming.

Eigenschaften

• Input Voltage: 2.7V to 5.5V

  • 36 Precision LED Current Sinks

  • OUT Pins Voltage Max. 5.5V

  • A Maximum of up to 70mA per Channel Current

  • Device to Device and Channel to Channel Current Accuracy: < 2% at 7mA to 70mA, and < 3.5% at 1mA to 7mA

  • 12-Bit (4096 Steps), 30kHz PWM Generator Integrated for Each Channel

  • PWM Phase Shifting

  • 6-Bit Global Current Dimming

  • Independent Color-Mixing Register per Channel

  • Independent Brightness Control Register per RGB Module

  • Optional Logarithmic- or Linear-Scale Brightness Control

  • Three Programmable Banks (A, B, C)

  • Serial Digital Interface (I2C/SPI)

  • Support 400kHz I2C Interface (Default)

  • Two External Hardware Address Pins Allow Connecting up to Four Devices (I2C Only)

  • 4MHz SPI Compatible Digital Interface (INT_SEL Pin = HIGH)

  • Broadcast Slave Address Allows Configuring Multiple Devices Simultaneously

  • Auto-Increment Allows Writing or Reading Consecutive Registers Within One Transmission

  • Diagnosis and Protections

  • Open Drain Fault Pin for Fault Indication

  • Individual LED Channel Open/Short Detection

  • Pre-UVLO Warning & Undervoltage Lockout (UVLO)

  • Overtemperature Protection (OTP) with Pre-OTP Warning

  • Digital POR Indicator

  • Individual Channel Fault Masking

  • Ultra-Low Quiescent Current:

  • Shutdown Mode: 1μA (Max.) When EN Low > 25ms

  • Power-Saving Mode: 15μA (Max.) When EN High and All LEDs Off for > 30ms

Typische Anwendungen

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers