TL497ACNG4

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The TL497ACNG4 is a high performance switching regulator, specifically designed for isolated, positive, dual output DC-DC applications. It is a controller integrated circuit with a typical peak output current of 110mA and a 40V input source. This regulator is efficient, reliable, and cost-effective, typically providing higher efficiency, less output ripple and better regulation than conventional regulators.

The TL497ACNG4 integrates the latest advanced high-voltage power management technology making it well-suited for high-power applications. It offers an adjustable soft-start feature which gradually increases the duty cycle of the output stage allowing the inductor current to slowly ramp-up, reducing inrush current on the power supply. It also features an adjustable operating frequency, allowing the user to optimize the operating frequency to achieve the desired output voltage level and reduce EMI (electromagnetic interference).

The TL497ACNG4 features an integrated step-up converter stage. This stage uses an external switching device controlled by the onboard power MOSFET driver. The switching device is connected to a transformer which steps-up the input voltage to a higher level for the output stage. The output stage is a synchronous rectifier, driving an external N-channel MOSFET to convert the high voltage back to a lower voltage.

The efficiency of the TL497ACNG4 regulator is of paramount importance and is tightly linked to the accuracy of its output voltage. The regulator features a small output voltage tolerance of 0.5% and a large ±1mV temperature coefficient range over the temperature range of -40°C to +125°C allowing for precise output voltage control. The precision regulator is designed to provide a fast loop latency and a low output voltage offset.

In addition to the precise output voltage accuracy, the TL497ACNG4 has excellent stability. It features an adjustable phase margin and automatically adjusts the bandwidth in the current limiting circuit increasing the stability and reducing the phase noise. The common-mode transient immunity is also improved by this design.

The TL497ACNG4 has both open-loop and closed-loop modes. In open-loop mode, the regulator is in direct control of the operating frequency, which can be adjusted to meet the desired output voltage. In closed-loop mode, the regulator monitors the output voltage and automatically adjusts its frequency to maintain a stable output voltage. Finally, the output voltage is monitored in both modes.

The TL497ACNG4 is a versatile and efficient DC-DC converter suitable for a wide range of applications, such as telecom and networking equipment, medical equipment, personal computing and portable electronic devices. It is designed to provide precise and accurate output voltage, making it well-suited for high-power applications. Its integrated power management technology and adjustable operating frequency provide excellent efficiency, while its low output voltage offset provides improved stability and reduced noise.

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