TPS61221DCKR

The TPS61221DCKR is a high-efficiency, step-up (boost) DC-DC converter designed by Texas Instruments. It is particularly well-suited for applications requiring a compact power supply solution, such as portable devices, battery-powered equipment, and energy harvesting systems. Below is a detailed description of its key features and specifications:

General Overview:

• Type: Step-up (Boost) DC-DC Converter
• Package: DCK (VSON) package, which is a small, thermally efficient surface-mount package.
• Dimensions: The DCK package typically measures 3 mm x 3 mm, making it suitable for space-constrained applications.

Electrical Characteristics:

• Input Voltage Range: The TPS61221DCKR operates with an input voltage range of approximately 0.3 V to 5.5 V, allowing it to work with a variety of power sources, including single-cell lithium-ion batteries and other low-voltage sources.
• Output Voltage Range: The output voltage can be adjusted from 1.8 V to 5.5 V, providing flexibility for different application requirements.
• Output Current: The device can deliver up to 1 A of output current, making it capable of powering various loads effectively.
• Efficiency: The TPS61221DCKR boasts high efficiency, often exceeding 90% under typical operating conditions, which helps to extend battery life in portable applications.

Control Features:

• Control Method: The converter uses a pulse-width modulation (PWM) control scheme, which helps maintain stable output voltage and minimizes ripple.
• Light Load Efficiency: It features a power-saving mode that enhances efficiency at light loads, making it ideal for battery-operated devices that experience varying load conditions.

Protection Features:

• Overcurrent Protection: The device includes built-in overcurrent protection to prevent damage during fault conditions.
• Thermal Shutdown: It has thermal shutdown capabilities to protect the device from overheating, ensuring reliable operation under various thermal conditions.

Additional Features:

• Soft Start: The TPS61221DCKR incorporates a soft-start feature that limits inrush current during startup, reducing stress on the power supply and connected components.
• Compensation: The device has internal compensation, simplifying the design process and reducing the need for external components.

Applications:

The TPS61221DCKR is suitable for a wide range of applications, including:

• Portable consumer electronics (e.g., smartphones, tablets)
• Wearable devices
• IoT (Internet of Things) applications
• Energy harvesting systems
• Battery-powered sensors and modules

Conclusion:

The TPS61221DCKR from Texas Instruments is a versatile and efficient boost converter that provides a reliable power solution for various low-voltage applications. Its compact size, high efficiency, and robust protection features make it an excellent choice for designers looking to optimize power management in portable and battery-operated devices.