TEA1938T/1J

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The TEA1938T/1J is a power management integrated circuit (PMIC) device designed specifically for use in an AC DC converter or off-line switcher application. It can be used to provide step-down, step-up, and inverting power conversion, for both AC and DC voltages. The device can also be used for LED constant-current control, allowing for a wide variety of LED applications, from general lighting to automotive lighting.

The TEA1938T/1J uses the ZVS (zero-voltage switching) technique to reduce switching losses. This technique involves the use of an auxiliary winding on the power transformer to generate a charging current, which is then used to charge up the input voltage capacitor before the switching cycle is initiated. This technique results in a much lower switching frequency than traditional fixed frequency systems, as well as better efficiency.

The TEA1938T/1J is composed of several sub-circuits, including a rectifier section, a voltage converter, a DC-DC converter circuit, an output driver, and so on. The device is designed to provide a stable, low-ripple output voltage over a wide range of load conditions.

The rectifier section of the device includes a bridge rectifier which is used to convert the AC input voltage into a DC voltage. This DC voltage is then fed to the voltage converter, which regulates it to the desired output voltage. For load conditions where the output voltage needs to be adjusted, an integrated DC-DC converter circuit is included. This circuit is used to reduce the output voltage, as well as provide current limiting for all load conditions.

The output of the converter circuit is fed to a driver circuit, where the voltage is further regulated and stabilized, before being sent to the output stage. The output stage of the device consists of a MOSFET or IGBT, or other suitable switch, depending on the application. The switching of the output device is controlled by a pulse-width modulation (PWM) circuit, which can be programmed to provide the desired output voltage over a wide range of load conditions.

Finally, the device also includes a number of protection features, such as over-voltage protection, over-temperature protection, and current limiting, to ensure reliable and safe operation.

The TEA1938T/1J is a very useful PMIC device, allowing for a wide range of uses, from AC and DC voltage conversion, to LED constant-current control. It is easy to program and use, and offers highly reliable performance in any application.

The specific data is subject to PDF, and the above content is for reference