TOP246GN-TL Integrated Circuits (ICs)

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

Power Management ICs (PMICs) play an essential role in the efficient operating of electronic devices by providing Voltage regulated DC power rails to the device. The TOP246GN-TL is an off-line switching-mode power supply controller that integrates a variety of functional blocks in one package to reduce the number of external components and provide the basis for an efficient power supply. This device provides a cost-effective, reliable and easy-to-design solution for a wide range of AC-DC and DC-DC converters.

The TOP246GN-TL is well-suited for use in applications with low power levels such as LED drivers, Standby power supplies, Small battery chargers and Motor drives. It can also be used in AC/DC power adapters, LCD TV/ monitors and telecom power supplies.

Operation Principle and Core Features

The TOP246GN-TL works based on a Fixed Frequency Variable Off-Time (FF-VOT) topology which allows the device to operate at high frequencies with a low switching loss. It can handle up to 150W of power and incorporates several key features such as valley-fill, automatic over-temperature protection, Brown-Out protection and current-mode power-on reset.

The controller includes a PWM current loop and adaptive blanking circuitry which allows it to work efficiently and ensure a smooth current waveform across a wide range of load conditions. It also includes an internal timer which can be used to detect short-circuits, line drops and detect open loop faults.

The TOP246GN-TL also offers a Brown-Out protection feature which detects whether the input voltage is too low and shuts down the switching FETs in order to protect the converter from excessive current. In addition, an over-temperature protection feature protects the device from too high a temperature and ensures that it operates within its safe operating area.

Design Considerations

Designing a power supply using the TOP246GN-TL requires careful consideration of the power levels, filters and other components that need to be included in the design. It is important to include a blocking capacitor which can help reject high frequency noise and improve the output voltage regulation. It is also advisable to include an external power switch, such as an NFET, in order to enable the user to cycle the power supply during fault conditions.

The TOP246GN-TL also includes an adjustable Frequency Oscillator which allows the user to tailor the switching frequency of the converter in order to reduce the audible noise generated by the converter. Additionally, an over-current sensing resistor is required in order to protect the converter from excessive current and ensure safe operation.

Conclusion

The TOP246GN-TL is an off-line switching-mode power supply controller that offers a cost-effective, reliable and easy-to-design solution for a wide range of AC-DC and DC-DC converter applications. This device features a PWM current loop, adaptive blanking circuitry, brown-out protection and an internal over-temperature protection to ensure safe operation. Careful consideration of the power levels, filters and other components should be taken into account when designing a power supply with the TOP246GN-TL.

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