描述 Description

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 best-in-class 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.

特性 Features

General
? Best-in-class full safe application for high-power adapters, which gives complete protection against overload conditions in the load (e.g. phone)
? Wide output voltage operating range (2.9 V to 20 V)
? Ultra-high efficiency together with TEA193x QR/DCM controller and TEA199x SR controller
? Very low no-load power (<30 mW for the complete system solution)
? High power density
? Dedicated SW pin to drive external NMOS directly
? Constant Voltage (CV) and Constant Current (CC) control
? Precise voltage and current control with low minimum step size (voltage 12-bit DAC,current 10-bit DAC)
? Continuous accurate measurement of output voltage and output current
? Low-cost SO10 package (suitable for reflow soldering and wave soldering)
? Low-cost Bill Of Materials (BOM; ≈15 external components)
? Embedded MCU (with ROM, RAM, and MTP memory)
? Discharge pin for fast discharge
? Built-in series regulator and cable compensation
? Non-volatile MTP memory for storage of system configuration parameters