Automotive USB 2.0 Supply with Data Line Protection and I²C Interface | E522.43

The E522.43 is a USB 2.0 compatible power supply with protection features for the automotive environment. Protection includes ISO7637 pulses on the input, as well as short to battery/ground and 2kV ESD (HBM) on the USB bus and data lines.

Stand-alone configuration of the E522.43 is carried out using external resisistive dividers tied to three individual configuration pins. A fully programmable version of this chip, the E522.41 is also available. An internal Switch-Mode Power Supply (SMPS) provides efficient USB 5V supply from either vehicle battery or a lower voltage bus rail. Selectable soft power-up sequence protects the external parts from overload and reduces inrush currents. The switching frequency can be synchronized in Master-Slave configurations with other devices via PLL input. In addition the switchable spread spectrum option reduces EMI.

The E522.43 supports USB charging downstream loads according to the Battery Charging Specification Revision 1.2 and various other specific USB charger emulations.