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Analog Devices Inc. MAX20069B Automotive LED Backlight Driver

Analog Devices MAX20069B Automotive LED Backlight Driver offers a 5V to 15V output voltage range, 10µA shutdown current rating, and -40°C to +105°C temperature range. This IC can power one to four strings of LEDs in the display backlight by integrating one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter. The power domain startup and shutdown sequences are controlled using one of the seven preset modes, selectable through a resistor on the SEQ pin or the I2C interface. Analog Devices MAX20069B Auto LED Backlight Driver IC is ideal for automotive dashboards, central information displays, heads-up displays, and navigation systems.

Features

  • 4-output TFT-LCD bias power
    • 2.8V to 5.5V input for the TFT-LCD section
    • Integrated 440kHz or 2.2MHz boost and buck-boost converters
    • Positive and negative 3mA gate voltage
    • Regulators with adjustable output voltage
    • Flexible resistor-programmable sequencing through the SEQ pin
    • Undervoltage detection on all outputs
    • Low-quiescent-current standby mode
  • 4-channel LED backlight driver
    • Up to 150mA current per channel
    • 4.5V to 42V input voltage range
    • Integrated Boost/SEPIC controller (440kHz or 2.2MHz)
    • Dimming ration at 10,000:1 at 200Hz
    • Adaptive voltage optimization to reduce power dissipation in the LED current sinks
    • Open-string, shorted-LED, and short-to-GND diagnostics
  • Low EMI
    • Phase-shift dimming of LED strings
    • Spread spectrum on LED driver and TFT
    • Selectable switching frequency with fine-tuning via I2C
  • I2C interface for control and diagnostics, fault indication through the FLTB pin and I2C
  • Overload and thermal protection
  • -40°C to +105°C ambient temperature operation
  • 40-pin (6mm x 6mm) TQFN package with exposed pad

Applications

  • Automotive dashboards
  • Automotive central information displays
  • Automotive head up displays
  • Automotive navigation systems

Simplified Block Diagram

Analog Devices Inc. MAX20069B Automotive LED Backlight Driver

Development Tools

Analog Devices Inc. MAX20069 Evaluation Kit

Demonstrates robustness of the MAX20069 and operates in the 2.8VDC to 5.5VDC voltage range.

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Related Products

Analog Devices / Maxim Integrated MAX20069 Automotive LED Backlight Driver

Automotive I2C-controlled 4-channel 150mA backlight driver with 4-output TFT-LCD bias.

Learn Moreabout Analog Devices / Maxim Integrated MAX20069 Automotive LED Backlight Driver View Productsrelated to Analog Devices / Maxim Integrated MAX20069 Automotive LED Backlight Driver
Published: 2020-10-29 | Updated: 2024-07-18