18-Channel Linear LED Driver
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The AL58818Q is comprised of 18 programmable LED current channels each with internal 12-bit PWM and 6-bit global current dimming for color and brightness control through I2C or SPI digital interface. AL58818Q is ideal for up to 6 RGB LED lighting modules with 3 programmable banks (A, B, C) for software control of each color or 18 Single Color LEDs with independent dimming for each channel. An external resistor can set up the global output current of all 18 channels. Each channel current can digitally be configured up to the thermal limitation of the package.
Features of the AL58818Q are controlled via I2C/SPI digital interface. Using a dedicated pin INT_SEL to select either I2C or SPI serial interface protocols. The AL58818Q has an internal 30kHz, 12-bit PWM generator for each channel, as well as channel/module independent color mixing and brightness control registers to enable PWM phase shift staggered delay out to achieve vivid LED effects without audible noise and meet EMC CISPR 25 Class 5 requirements. Users can benefit from the device’s ultra-low shutdown IQ Power Saving Mode and easy software programming.
The device operates over -40°C to +125°C ambient temperature range. The AL58818Q is available in W-QFN5050-40/SWP (Type A1) MSL level 1 package.
AEC Qualified | Yes |
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Compliance (Only Automotive Supports PPAP) | Automotive |
Topology | Linear LED Driver |
Minimum Supply Voltage (V) | 2.7 V |
Maximum Supply Voltage (V) | 5.5 V |
Maximum VOUT (V) | 5.5 V |
Number of Channels | 18 |
Low Dropout VSAT (mV) | 200@70mA (Typ) mV |
Output Current (mA) | 70 mA |
Channel Max. Output Current (mA) | 70 mA |
Accuracy (%) | ?3 % |
Control Interface/Protocols | I2C/SPI |
Diagnosis & Protection | Fault Pin and Diagnosis Registers |
Dimming (Analog) | 6-bit global brightness control |
Dimming (PWM) | 12-bit - 30KHz internal oscillator and register |
Temperature Range (°C) | -40 to 125 °C |
Moisture Sensitivity Level (MSL) | 1 |