Analog Devices Inc. MAX20444B Evaluation Kit
Analog Devices Inc. MAX20444B Evaluation Kit is used to demonstrate the MAX20444B integrated, 4-channel, high-brightness LED driver. The driver features a boost controller and an I2C interface for automotive displays. The kit operates from a DC supply voltage between 4.5V and 36V. The switching frequency can be either 2.2MHz or 400kHz. The kit can operate in stand-alone mode or in I2C mode. Spread-spectrum mode (SSM) for EMI improvement is enabled by default, but it can be disabled through a register bit.
The kit demonstrates phase-shifted pulse-width modulation (PWM) dimming. This can be performed externally using a PWM signal applied to the DIM PCB pad or internally by programming the desired dimming frequency and individual duty cycle using I2C. The hybrid dimming feature can also be enabled through a register bit to reduce EMI. The kit also demonstrates fault protection for short LED, open LED, boost output under/overvoltage, and overtemperature. The kit provides an I2C interface that can operate with the MINIQUSB+ adapter board or a third-party I2C master. It also includes Windows®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the IC.
Features
- Demonstrates the robustness of the MAX20444B
- Wide 4.5V to 36V input operating range (up to 52V load dump)
- Powers HB LEDs (up to four strings) for medium-/large-sized LCD displays in automotive and display backlight applications
- 400kHz to 2.2MHz resistor-programmable switching frequency with spread-spectrum option
- Phase-shift dimming option
- Demonstrates cycle-by-cycle current limit and thermal-shutdown features
- Demonstrates wide dimming ratio
- Demonstrates failsafe operation
- I2C programmability
- Dedicated GUI
- Proven PCB and thermal design
- Fully assembled and tested
Applications
- Infotainment displays
- Central information displays
- Instrument clusters
Related Products
Analog Devices Inc. MAX20444B 4-Channel Backlight Driver ICs
Features a boost controller with integrated current outputs for automotive displays.