TPS40091PWR Integrated Circuits (ICs)

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The TPS40091PWR is a controller IC for synchronous buck application primarily developed for DC/DC step down regulation in Active Power Factor Correction (PFC)/ DC-DC topologies. This device can be used as a controller for switch mode power supply, as well as for other low-noise synchronous buck regulator applications. It features an internal high current driver with integrated level shifters and it supports high-side and low-side N-channel MOSFETs.

This device provides excellent performance, including maximum efficiency and lowest system cost. It has built-in PFC pre-regulator, integrated high-voltage current sense amplifier and fast, accurate over-current protection. It also has a constant on-time, pulse-by-pulse current limit control architecture which can be configured to operate in either continuous conduction mode (CCM) or discontinuous conduction mode (DCM) according to the needs of the application. The integrated 16-bit current DAC allows for precise output current control and the device provides good line and load regulation performance.

The TPS40091PWR work as a controller for switch mode power supplies. It relies on a control resistor for setting the required Voltage, Current and Frequency parameters which are fed back to the chip. The device is operated in a fixed frequency, phase shift PWM mode with modulation independent of the current waveform. The PWM signal is then amplified to generate the gate drivers necessary to drive the power MOSFETs. The frequency is programmable from 100 kHz to 1 MHz and can be optimized for maximum efficiency.

The TPS40091PWR is also used for wide load range applications. It can accept input voltage range of 4V to 44V and can provide output voltage range of 0.59V to VIN. It also has integrated over-current, over-voltage and over-temperature protection which provides high reliability and flexibility. The device also has an integrated gate driver which supports very high switching frequencies, up to 1MHz at supply voltage of 5.5V. This makes this IC a suitable choice for high-efficiency applications.

The usage of the TPS40091PWR is not just limited to its primary domain of DC-DC buck regulators with Active Power Factor Correction(PFC). It can also be used for any other low-noise synchronous buck regulator application such as a single cell Li-ion battery charger like those used in mobile handheld devices, solar inverters, laser diode drivers, half-bridge power supplies and telecom power supplies.

Overall, TPS40091PWR is an advanced, integrated DC/DC buck regulator with Active Power Factor Correction, which provides an ultra-high-efficiency power solution with low solution cost. This controller IC offers excellent performance for wide load range applications and it is perfect for any low-noise synchronous buck regulator implementations.

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