The MAX20461 evaluation kit (EV kit) demonstrates
the MAX20461 automotive high-current, high-efficiency,
step-down DC-DC converter with integrated USB Type-C
DFP controller and 1GHz bandwidth USB 2.0 D+/D- protection
switches, which provide ESD and short-to-battery
protection for low-voltage transceivers.
The MAX20461 features integrated host-charger port-detection
circuitry that adheres to the USB Type-C specification,
the USB-IF BC1.2 battery-charging specification,
Apple iPod/iPhone/iPad® and Samsung® charge-detection
termination resistors, and Chinese Telecommunication
Industry Standard YD/T 1591-2009.
The MAX20461 integrates high-side current sensing and
voltage adjustment circuitry, which provides automatic
USB voltage adjustment to compensate for voltage drops
in captive cables associated with automotive applications.
The MAX20461 step-down, synchronous, DC-DC converter
operates from a voltage of up to 28V continuous
and protects against load-dump transients up to 40V. The
converter is programmable for frequencies from 275kHz
to 2.2MHz and can deliver 3A continuously.
The EV kit contains an I2C-enabled MAX20461. The I2C
interface allows for flexible configuration, detailed fault
diagnostics, and access to the on-chip ADC that reports
die temperature, output voltage, and output current.
The I2C features are easily accessed using the Maxim
MINIQUSB module and the provided example GUI.
The EV kit is configured for 2.2MHz operation. The data
switches of the MAX20461 generally do not require
far-eye tuning; the EV kit is populated with shorts.
Applications
- Automotive Connectivity/Telematics
- Automotive Radio and Navigation
- Dedicated USB Charging Port (DCP)
- USB Port for Host and Hub Applications
