TEA1998TS/1H

The TEA1998TS/1H is a Universal Serial Bus (USB) power controller solution from NXP Semiconductor Inc. It controls and monitors power supply systems with high precision, accuracy, and low noise performance. The device contains a high power thermal diode, as well as a circuit breaker switch, and can be used as a power supply controller in various applications, such as embedded systems, consumer electronics, and industrial sensors.

Features

The TEA1998TS/1H offers a wide variety of features, including:

• A wide input voltage range of 4.5V~36V with 180 VA Pout
• High input impedance to reduce power losses and improve efficiency
• Controls output voltage for high precision with low noise performance
• Thermal overload protection, with thermal diode and automatic circuit breaker switch
• Integration of power-good timer to improve system reliability
• Complies with USB low-power specifications

Applications

The TEA1998TS/1H is a versatile, power control solution that can be used in a variety of applications, including:

• Embedded systems: industrial, consumer and automotive
• Consumer electronics: computers, tablets, mobile phones and gaming consoles
• Industrial sensors: pressure, temperature, humidity and flow
• Automotive systems: occupant safety systems and powertrain

Working Principle

The TEA1998TS/1H is a dual-channel power controller that uses a voltage regulation loop to control and monitor the output voltage. The controller is connected to a load, such as a DC motor, and the voltage regulation loop is used to keep the output voltage stabilized at a desired level. The loop includes a voltage reference, an error amplifier, a power MOSFET switch, and an external resistor divider. The voltage reference sets the reference voltage for the loop, and the error amplifier compares the reference voltage with the output voltage. If the output voltage is too low, the error amplifier will drive the power MOSFET switch, which will draw current from the load and increase the output voltage. If the output voltage is too high, the error amplifier will shut off the power MOSFET switch, which will reduce the amount of current drawn from the load and lower the output voltage. The TEA1998TS/1H also has a thermal diode and a circuit breaker switch, which can be used to protect the device from over-current and over-voltage. The device can also be used as a power supply controller in embedded systems by controlling power on and off.