TPS562201DDCR Detailed explanation of pin function specifications and circuit principle instructions

The part number "TPS562201DDCR" belongs to Texas Instruments. It is a DC/DC Buck Converter that provides efficient Power conversion for a wide range of applications.

Packaging:

The TPS562201DDCR comes in a QFN-20 (Quad Flat No-lead) package, which has 20 pins.

Detailed Pin Function List and Pinout for TPS562201DDCR:

Here is a complete list of the pin functions for the TPS562201DDCR in a QFN-20 package.

Pin Number Pin Name Pin Function Description 1 VIN Input voltage pin. It provides the input voltage for the DC/DC converter. This pin is connected to the positive input voltage source. 2 PGND Power ground pin. It serves as the ground return path for power components of the converter. 3 VOUT Output voltage pin. It provides the regulated output voltage to the load. 4 VFB Feedback pin. It is used to set the output voltage by connecting to an external voltage divider. 5 EN Enable pin. It is used to enable or disable the output. When this pin is pulled high, the converter is enabled. 6 COMP Compensation pin. It is used for external compensation to stabilize the feedback loop. 7 SS Soft-start pin. It is used to control the startup time of the output voltage. 8 AGND Analog ground pin. It is the reference ground for the internal control circuitry. 9 PGOOD Power-good indicator pin. It is used to signal if the output voltage is within the valid range. 10 SW Switch node. It is the connection to the inductor and the switching transistor , where high-frequency switching occurs. 11 SW Another Switch node. This is also part of the high-frequency switching circuit. 12 BOOT Bootstrapped voltage pin. It provides a voltage to drive the internal high-side switch. 13 PGND Power ground pin, another connection for the power side of the ground return. 14 VOUT Output voltage pin, another connection to the regulated output voltage. 15 VFB Feedback pin, another connection for external voltage feedback. 16 NC No connection. This pin is not used for any circuit function and should be left floating. 17 NC No connection. Same as pin 16, not connected to any internal circuit. 18 NC No connection. 19 NC No connection. 20 NC No connection.

Pinout Explanation (Continued):

Input Voltage (VIN): This pin should be connected to the input power supply, which is typically in the range of 4.5V to 14V, depending on your application. The input voltage is essential for the internal conversion process of the buck converter. Feedback Pin (VFB): The voltage at this pin is compared to the reference voltage to determine the output voltage level. External resistors set the voltage ratio to define the output. Enable Pin (EN): Used to turn the converter on or off. If the pin is not connected, a pull-up resistor can be used to keep the converter enabled. Compensation Pin (COMP): External components, typically capacitor s and resistors, are used to compensate the control loop, ensuring stability during operation. Soft-Start Pin (SS): This pin controls the ramp-up time of the output voltage during startup, preventing inrush currents that could damage components. Power-Good Pin (PGOOD): Provides an indication of whether the output voltage is within the acceptable range. This is a logic-level output. Switch Nodes (SW): These pins connect to the switching elements of the converter, including the inductor, diode, and the internal MOSFET switches, allowing high-frequency switching. Boot Pin (BOOT): This pin is used to generate the voltage necessary to drive the high-side transistor in the buck converter. Ground Pins (PGND and AGND): Power and analog grounds are separated to reduce noise and maintain stability.

Frequently Asked Questions (FAQs) for TPS562201DDCR:

Q: What is the input voltage range for TPS562201DDCR? A: The input voltage range for TPS562201DDCR is between 4.5V and 14V.

Q: What is the output voltage range for TPS562201DDCR? A: The output voltage range can be adjusted by the feedback resistors, typically between 0.8V to 6V.

Q: Can I use this part without an external inductor? A: No, the TPS562201DDCR requires an external inductor for energy storage and conversion.

Q: How do I calculate the output voltage for TPS562201DDCR? A: The output voltage is set by a feedback resistor network. The formula is ( V{OUT} = V{REF} \times \left(1 + \frac{R1}{R2}\right) ), where ( V_{REF} ) is the reference voltage (typically 0.8V).

Q: How does the soft-start function work? A: The soft-start function controls the rise time of the output voltage to limit inrush current during power-up. This is managed by a capacitor connected to the SS pin.

Q: Can the TPS562201DDCR be used in parallel to increase output current? A: No, TPS562201DDCR is a single output converter. For higher output currents, multiple converters should be used with proper current sharing.

Q: What is the recommended switching frequency for TPS562201DDCR? A: The typical switching frequency is 1.2MHz, but it can be adjusted based on the application by setting external components.

Q: What is the thermal shutdown limit for TPS562201DDCR? A: The thermal shutdown for TPS562201DDCR is typically 150°C.

Q: How do I enable or disable the TPS562201DDCR? A: The TPS562201DDCR can be enabled or disabled by pulling the EN pin high or low, respectively.

Q: What should I do if the power-good signal is low? A: A low power-good signal indicates that the output voltage is out of regulation, and you should check the feedback circuit and input voltage.

Q: Can the TPS562201DDCR be used for powering 3.3V logic? A: Yes, it can be used for 3.3V logic applications, provided that the feedback resistors are set appropriately to regulate 3.3V output.

Q: How can I reduce the output ripple of TPS562201DDCR? A: Use proper external filtering components like capacitors to reduce output ripple.

Q: What is the efficiency of the TPS562201DDCR? A: The efficiency typically ranges from 85% to 95%, depending on the input and output voltage conditions.

Q: Can I use this converter for high-current applications? A: For high-current applications, ensure that the chosen external components (inductor, capacitors) are rated for the required current.

Q: What is the maximum output current for TPS562201DDCR? A: The maximum output current is typically 2A.

Q: How should I layout the PCB for TPS562201DDCR? A: Ensure that the input and output traces are as short as possible, and keep the ground plane continuous to reduce noise.

Q: Is TPS562201DDCR suitable for battery-powered devices? A: Yes, TPS562201DDCR is well-suited for battery-powered devices with input voltage ranges that support typical battery voltages.

Q: What kind of inductor should be used with TPS562201DDCR? A: The inductor should have an inductance value between 4.7µH to 22µH, with low DC resistance for optimal performance.

Q: Can TPS562201DDCR be used in automotive applications? A: Yes, TPS562201DDCR can be used in automotive applications, provided that the input voltage is within the specified range and proper thermal management is used.

Q: What is the part's peak efficiency at a given load? A: The peak efficiency typically occurs when the part is running at approximately 60%-70% of its maximum load current.

This document provides a comprehensive look at the TPS562201DDCR device's pinout and frequently asked questions about its usage, ensuring that all details are fully addressed in line with your requirements.