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

• Electric vehicle charging stations, Infotainment displays
• Smart home appliances
• Computing hardware

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers