TPS22943DCKR

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TPS22943DCKR Application Field and Working Principle

The TPS22943DCKR integrated circuit (IC) is part of the Power Management IC (PMIC) family. It is categorized as a power distribution switch, load driver, and provides desired electrical power to output ports while managing overall system power efficiency. TPS22943DCKR is a series of bipolar switches specifically designed for portable and mobile applications where low power dissipation and small form factor is critical. It offers low RDS(ON) (on-resistance) and fast turn-on time ( < 500 ns) for a variety of portable and mobile applications.

Features

• Wide voltage range from 2.7V to 5.5V
• Current-Limit Adaptive Over-Current Management
• Integrated Low RDS(ON) MOSFETs
• Zero standby power ( < 0.1 uA)
• Low-side switch and high-side switch configuration
• Reverse voltage protection
• Over-load protection
• Six control line options
• Available in 8-pin DFN (Dual Flat No-Lead) and 10-pin QFN packages

Applications

TPS22943DCKR is suitable for high temperature and low-power applications in the industrial, medical and wireless markets. It is designed for applications such as laptop computers, netbooks, medical and instrumentation equipment, and mobile or handheld devices powered from AA, AAA or similar batteries.

Working Principle

TPS22943DCKR is a voltage regulator that limits the voltage and associated current delivered to the output. This voltage regulation process is based on two components: Voltage Input Limitation circuit and Load Driving (LD) circuit. The Voltage Input Limitation circuit sets the output voltage level and keeps it within the desired range. It measures the input voltage and compares it to the desired output voltage. If the input voltage exceeds the output voltage, then the Voltage Input Limitation circuit limits the input voltage so that the output voltage is not exceeded. Meanwhile, the Load Driving (LD) circuit acts as an adjustable current-limiter and helps limit the total power dissipation at the output. It monitors the current being consumed by the load and limits it when the current exceeds a specified limit.

In terms of current capacity, TPS22943DCKR can provide up to 3.2A (1.6A per channel). This maximum current rating is adjustable using a resistive divider (reference resistor) placed between the REF pin and ground. This allows the maximum current to be limited over a range of 2.4 A to 3.2A in order to match the current needs of different applications.

Conclusion

The TPS22943DCKR is an integrated circuit that provides a low-power solution for portable and mobile applications. It features an adjustable current-limit adaptive over-current management, low RDS(ON) MOSFETs, a reverse voltage protection and an over-load protection. An advantage of this IC is that there is zero standby power dissipation, making it perfect for applications with limited power constraints. TPS22943DCKR is well suited for use in laptops, netbooks, medical and instrumentation equipment, and other mobile devices that are powered with AA, AAA or similar batteries.

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