TPS53129RGER Integrated Circuits (ICs)

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The Texas Instruments TPS53129RGER is a high-frequency, synchronous step-down converter with integrated power switches. It is capable of providing up to 8A of continuous output current from a 3.2V to 16.5V input rail. This device is part of the RoHS-compliant NRND (“not recommended for new designs”) family, making it a suitable choice for legacy applications. The TPS53129RGER is a high-voltage, synchronous, step-down controller intended for multiple different applications.

The device is targeted at a wide range of loads, from up to 300W flyback converters and 400W BOM-free buck-boost converters, and offers an adjustable output voltage range down to 0.8V. It requires minimal external components, improving board space, cost, and complexity of the design. The TPS53129RGER also features a wide selection of protection functions, including under-voltage locking, over-voltage protection and over-temperature protection to ensure reliable system performance.

The device is based on a hysteretic current-mode topology, which results in better response to transients and higher efficiencies at light loads. It employs the fast-transient-response PFM mode feature, which allows the power converter to reach the maximum efficiency of 97%. Also, the spread spectrum feature ensures low EMI interference.

In addition, the TPS53129RGER has an integrated MOSFET driver, which reduces the external component count and simplifies the circuit, making the design simple and cost-effective. It also helps to improve power-conversion efficiency, as it operates at a much higher frequency of up to 2.2MHz.

TPS53129RGER is suitable for a wide range of automotive and industrial applications, such as buck-boost converters, power adapters, electric car chargers, and embedded systems. Its high-efficiency, high-frequency operation and integrated protection functions make it an ideal choice for cost-sensitive, high-load applications.

The working principle of this device is based on hysteretic current-mode topology. The TPS53129RGER has an internal comparator that continuously monitors the feedback voltage. When the monitored voltage falls below the user-defined threshold, the device turns its N-channel MOSFET switch on, allowing the current to flow through the inductor. This reduces the input voltage, increases the output voltage, and stores energy in the inductor. When the monitored voltage exceeds the threshold voltage, the device turns off the MOSFET switch, and the inductor releases the stored energy to the output, lowering the output voltage. This process is repeated continuously, resulting in a DC output voltage.

To sum up, the TPS53129RGER is a high-frequency, synchronous, step-down converter with integrated power switches. It is suitable for a wide range of automotive and industrial applications due to its high efficiency, high frequency operation and integrated protection functions. The device works on a hysteretic current-mode topology and has an internal comparator that continuously monitors the feedback voltage. It is an ideal choice for cost-sensitive, high-load applications.

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