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TEA1903T: USB-PD type C controller for SMPS

The TEA1903 is a USB Power Delivery (USB-PD) type-C controller with a high integration level and near fully digital implementation. The high integration level ensures a secondary side solution with a bear minimum of external components. The TEA1903 USB-PD controller drives an NMOS load switch. It achieves a very high power density Switching Mode Power Supply (SMPS) with an ultra-high efficiency over the entire load range. When applied in combination with the NXP® Semiconductors primary controller, TEA1936T, it meets the CoC Tier-2, EuP lot 6, and DOE v6 energy efficiency requirement specifications.

In addition to the power control and required protections, the TEA1903 incorporates the full feature set of the type C USB-PD protocol that is required for an AC-to-DC SMPS adapter.

The SW pin is used to drive an external load switch (NMOS), which enables/disables the power over VBUS. When the output voltage is reduced or the type-C cable is detached, the DISCH pin ensures that the output voltage discharges in a controlled way to the voltage level required by the USB-PD protocol.

The TEA1903 incorporates all required protections, like OverTemperature Protection (OTP), adaptive OverVoltage Protection (OVP), Short Circuit Protection (SCP), and UnderVoltage LockOut (UVLO).

• High integration level (only requires an external line switch and SR diode or controller)
• NMOS load switch without external winding
• Fault handling at secondary side without second optocoupler
• Low-cost SO10 package (suitable for both reflow soldering and wave soldering)
• Low-cost Bill Of Materials (BOM; ≈15 external components)
• Very low no-load power (< 25 mW for the complete system solution)
• High power density
• Ultra-high efficiency

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