TDL 3-4810

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DC-DC converters are a type of power converter which present useful devices to modify DC voltage levels. Qualcomm TDL 4810 is a synchronous Buck-Boost converter widely used in telecommunication industry for voltage regulation purpose. This paper introduces the application area and working principle of TDL 4810.

Application Field for TDL 4810

Specifically, TDL 4810, which is offered by Qualcomm, is a synchronous buck-boost DC-DC converter. It helps to maintain a constant output voltage even when input voltage fluctuates. It wide application scope includes:

1. Synchronous rectification: Use TDL 4810 to maintain a constant output voltage when input voltage varies from 5.5V ~ 28V. It functions in buck or boost modes for different input voltages.

2. Battery backup: TDL 4810 is used to provide regulated voltage when power fails, thus extending the lifetime of the battery.

3. Industrial power supply: TDL 4810 provides constant voltage even when input voltage changes. This feature makes it preferred in industrial power supply.

Working Principle of TDL 4810

TDL 4810 integrates two kinds of power conversion stages—Power factor booster and buck-boost regulator. The first one synchronizes input signal with inductor current while the second one converts voltage effectively. Here is the working principle:

First, the power factor booster stage changes a high-frequency AC signal to a low frequency AC signal, allowing it to be applied to the synchronous rectifier. The power factor booster harmonizes the current with the input voltage, minimizing system inefficiencies.

In the second stage, the buck-boost converter regulates the output voltage by synchronizing the inductor current with the input signals. Meanwhile, the integrated MOSFETs regulate the output voltage by controlling the switch resistance, ensuring the output voltage does not go beyond the required range.

Finally, an error amplifier compares the output voltage to a reference voltage and gives feedback to the power MOSFET, ensuring the accuracy of the output voltage.

Conclusion

In conclusion, Qualcomm TDL 4810 is a synchronous buck-boost DC-DC converter widely used for different voltage regulation purposes. It mainly consists of two stages—power factor booster and buck-boost regulator—to improve system efficiency and ensure stability and accuracy of the output voltage.

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