TPS40190DRCR

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TPS40190DRCR is a member of a new family of DC-DC switching controllers adopted by Texas Instruments (TI). This device features a 2-phase interleaved operation and supports up to 20V input voltage and 1.5A output current. The device has a wide range of features, which makes it suitable for a variety of applications.

Application Field

TPS40190DRCR is a suitable device for battery-powered applications such as power management and conversion for portable electronic equipments. It offers efficient power conversion and can also be used for solar panel, automotive, industrial and instrumentation applications. The device provides significant advantages over traditional linear regulators in terms of lower power dissipation and higher efficiency. It eliminates the need for the extra external components and simplifies the system design thereby saving board space.

Working Principle

The TPS40190DRCR is a synchronous switching controller that utilizes pulse width modulation (PWM) technology. The device has a synchronous rectifier, which increases the power efficiency by eliminating the need of an additional external diode. It uses an low on-resistance power MOSFETs as the switching elements. The device also features built-in protection features, such as under-voltage lockout, over-voltage protection and built-in current limit protection. The output voltage can be set using an external resister divider. The device is also programmable which facilitates easy customizing of the output voltage according to the application.

The output voltage can be throttled according to the temperature of the environment. The power supply is enabled/disabled by logic control (UP/DN pins). This logic also serves to switch between the transition-mode and the pulse-skipping mode, for better efficiency and reduced EMI respectively. The current limit threshold is set to guarantee a minimum load-line over a wide temperature range.

The TPS40190DRCR also has a Soft-Start feature that allows for an adjustable startup ramp time for the output voltage. This helps reduce the inrush current and stress on the output components during start of the system. This device also offers switch-mode support for current-sensing applications and has an option for cycle-by-cycle current limit.

Conclusion

Thus, TPS40190DRCR is a versatile DC-DC switching controller that offers significantly improved performance and efficient power conversion over traditional linear regulators. With its wide range of features, such as adjustable voltage level, programmable parameters, and built-in protection features, the device can find application in a wide range of battery-powered and solar panel, automotive, industrial and instrumentation applications. The device can also reduce the complexity of system design by eliminating the need for extra external components.

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