TPS54327DRCR

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Negative systems are often needed in the field of electronics and many different techniques can be used to achieve negatively biased rails. The Texas Instruments TPS54327DRCR is a Double Differential Drive Step-Down DC/DC controller with an integrated power switch. It is designed to deliver high performance, high efficiency and minimal thermal dissipation when powering negative rails from positive input sources. It features a dual-loop architecture, with an outer voltage loop and an inner control loop to ensure fast transient response. Its operation can be optimized to suit the system requirements by the selection of the appropriate components and settings.The TPS54327DRCR can be used in a variety of applications where an efficient negative rail is needed, such as in power supplies, switches, converters, and load sharing rails.

Application Field

The TPS54327DRCR is a high performance dual loop step-down DC/DC controller that provides a high level of efficiency and minimal thermal dissipation when powering negative rails from a positive source, such as a battery or AC adapter. With its dual loop architecture, it is capable of accurately delivering the negative output voltage from the input source. It is designed for asynchronous buck type applications, so it can take advantage of synchronous rectification for improved efficiency. Additionally, it can operate in voltage mode or current mode control, giving users the ability to select the best mode for the application. It also has a wide input voltage range (2.5 to 32V) and a wide output current range (up to 6A) to suit a variety of applications.

Working Principle

The TPS54327DRCR uses a dual loop architecture, with an outer voltage loop and an inner control loop. The voltage control loop monitors the output voltage and adjusts the duty cycle of the switching transistors of the power stage to maintain the required output voltage. The control loop monitors the average current on the power switch, and adjusts the frequency of the switching transistors in order to minimize power loss and minimize ripple in the output voltage. Additionally, it features a range of features to optimize the performance of the device, such as programmable soft start, over current protection and worst-case-scenario over temperature protection.

The TPS54327DRCR also has multiple protection features to guard against potential faults, such as an under voltage lockout, over current protection, over voltage protection, and an over temperature protection. Additionally, it is designed to be immune to external magnetic fields, so that it can be used in a variety of applications where high level of EMI/RFI suppression is required.

In summary, the TPS54327DRCR is a high performance dual loop controller designed to power negative rails from a positive source. It features a wide input voltage range, a wide current range, and various protection features for enhanced reliability. It is an ideal choice for powering negative rails in applications that require an efficient and reliable power source.

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