The MAX25024 evaluation kit (EV kit) demonstrates the
MAX25024 integrated 4-channel, high-brightness LED
driver with boost controller and I2C interface for automotive
displays supporting ASIL-B.
The EV kit operates from a DC supply voltage between
2.5V and 36V, and the switching frequency can be set
at either 2.2MHz or at 400kHz. The EV kit can only be
configured to operate in I2C mode. Spread-spectrum
mode (SSM) is enabled by default for EMI improvement,
but it can be disabled by acting on a register bit. The EV
kit demonstrates phase-shifted pulse-width-modulation
(PWM) dimming. Dimming can be performed either externally
using a PWM signal applied to the DIM PCB pad or
internally by programming the desired dimming frequency
and individual duty cycle via I2C. The hybrid dimming
feature can also be enabled through a register bit to
reduce EMI. The EV kit also demonstrates fault protection
for short-LED, open-LED, boost-output undervoltage
and overvoltage, and overtemperature. Additional ASIL-B
features such as LED current measurement, boost-input
current measurement and boost-output voltage measurement
are also demonstrated.
For operation at switching frequencies other than 2.2MHz
or 400kHz, the external components should be chosen
according to the calculations in the MAX25024 IC data
sheet.
The EV kit provides an I2C interface that can operate
in conjunction with the MINIQUSB+* adapter board or
a third-party I2C master. The EV kit also includes
Windows® -compatible software that provides a simple
graphical user interface (GUI) for exercising the features
of the IC.
*Note: To be ordered separately.
Applications
- Central Information Displays
- Infotainment Displays
- Instrument Clusters
