Analog Devices / Maxim Integrated MAX20444B 4-Channel Backlight Driver ICs

Analog Devices Inc. MAX20444B 4-Channel Backlight Driver ICs feature a boost controller for automotive displays. The MAX20444B ICs have integrated current outputs that can sink up to 130mA LED current each. The devices accept a wide 4.5V to 36V input voltage range. The ICs can withstand direct automotive load-dump events. The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates in the 400kHz to 2.2MHz frequency range. Integrated spread spectrum helps reduce EMI. An adaptive output-voltage control scheme minimizes power dissipation in the LED current-sink paths.

Features

Wide Voltage-Range Operation
- Operates Down to 4V Supply After Startup
- Survives Load Dumps Up to 52V
High Integration
- Complete 4-Channel Solution Including Boost Controller
- I²C Control for Minimum Parts Count
Robust and Low EMI
- Spread-Spectrum Oscillator
- Phase Shifting
- 400kHz to 2.2MHz Switching-Frequency Range
- Fail-Safe Operation Mode Using the FSEN Pin

Versatile Dimming Scheme Allows Hybrid or PWM-Only Dimming Using DIM Input or I²C
- Dimming Ratio > 10,000:1 Using Hybrid Dimming
- 10,000:1 Dimming Ratio at 200Hz Using PWM Dimming
Complete Diagnostics
- LED Open/Short Detection and Protection
- Boost Output Undervoltage and Overvoltage
- Boost-Voltage Measurement
- LED-Current Measurement
- Thermal Shutdown
Compact (4mm x 4mm) 24-Pin TQFN and SWTQFN Packages

Applications

Infotainment Displays
Central Information Displays
Instrument Clusters

Analog Devices / Maxim Integrated MAX20444B 4-Channel Backlight Driver ICs

Features

Applications

Typical Application Circuit

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