Analog Devices / Maxim Integrated MAX25512 4-Channel LED Backlight Driver

Analog Devices MAX25512 4-Channel LED Backlight Driver is a white LED backlight driver with an integrated current-mode boost converter that operates over a switching frequency range of 400kHz to 2.2MHz and incorporates a spread-spectrum. Phase-shifting of the output channels is included as an option to further reduce electromagnetic interference (EMI). The device provides up to 120mA per channel and includes a control output for an external nMOS series switch. It is capable of operating down to 3V after startup. The MAX25512 has an I²C interface to enable flexibility of control and detailed diagnostics. The Analog Devices MAX25512 is available in a compact TQFN package and operates over the temperature range -40°C to +125°C.

Features

Operates down to 3V on battery input after startup
- Wide boost duty cycle to support low input voltage
Boost or SEPIC current-mode DC/DC controller
- 400kHz to 2.2MHz operating frequency range
- Spread spectrum available
- Ability to synchronize to an external clock
LED current sinks
- Up to 120mA output current per string
- Low OUT_Regulation voltage for best efficiency
- Optional phase-shifting of outputs
I²C control for enhanced flexibility

16667:1 dimming ratio at 200Hz
NTC input for LED current foldback at high temperature
Hybrid dimming capable
Built-in programmable automatic fading functionality
Detailed diagnostic using I²C and FLTB output
- Shorted or open LEDs
- Thermal shutdown
- Output undervoltage
Compact 4mm x 4mm TQFN package
AECQ100 Grade 1

Applications

Automotive instrument clusters
Automotive central information displays
Automotive head-up displays

Analog Devices / Maxim Integrated MAX25512 4-Channel LED Backlight Driver

Features

Applications

Simplified Block Diagram

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