The TEA19031AT is a secondary side SMPS controller that supports the USB Power Delivery (USB-PD) 2.0 (certified: 2017-03-22; test ID: 100054) and USB type-C v1.2.
- 18 W applications: TEA19031AGT
- 30 W applications: TEA19031AMT
- 45 W applications: TEA19031AET
- 60 W applications: TEA19031AFT
Together with the TEA193x primary controller and the TEA199x secondary side Synchronous Rectifier (SR) controller, a Switched Mode Power Supply (SMPS) can be built.
The SMPS has a small form factor and ultra-high efficiency over the entire load range. This power supply has an extremely low no-load input power (< 30 mW). It meets efficiency requirements like CoC Tier-2, EuP lot 6, and DOE v6. The complete SMPS system can be built at low cost with a minimum number of external components. The TEA19031AT has a high level of digital integration. It incorporates all circuits, including a charge pump to drive an external NMOS load switch directly. It also incorporates a USB PD Physical Interface (PHY) and an integrated driver for fast output discharge.
The output voltage and output current are continuously measured. They are used to control the SMPS. The NTC pin can continuously measure the adapter temperature or the temperature in the cable/connector. Optionally, the NTC pin can also be used for other features, like OTP or Synchronous Rectification (SR). The die temperature of the TEA19031AT is measured and protected via an internal temperature sensor.
The TEA19031AT provides high-effiency charging safety. To ensure the safe operation of the SMPS, it incorporates all required protections. These protections cover up to 19 different failure use cases. To ensure correct operation under all conditions, all protections are implemented in hardware. So, when the microcontroller stops, the protections are still functional. If an output short circuit occurs, the power dissipation from the mains input in the adapter is less than 50 mW.
For output voltage/current regulation, and protection, only a single optocoupler is required in the application. The TEA19031AT operates in Constant Voltage (CV) mode with better than 2 % Voltage accuracy or in Constant Current (CC) mode with better than 2 % full load current accuracy.