TPS563201DDCR Detailed explanation of pin function specifications and circuit principle instructions

The part number "TPS563201DDCR" is from Texas Instruments. It refers to a specific DC-DC buck converter integrated circuit. The part features a compact QFN package. Below, I will explain the pin function specifications, provide a detailed explanation of the full pinout, and present a list of the most common FAQ questions based on the full pinout and circuit operation.

Pinout and Pin Function Descriptions

The TPS563201DDCR comes in a 16-pin QFN (Quad Flat No-leads) package. This 16-pin package has the following pin configuration and functionality:

Pin Number Pin Name Pin Function Description 1 VIN Input Voltage Pin: The pin where the input voltage (4.5V to 17V) is supplied. 2 SW Switch Pin: Connects to the inductor. This pin is used for switching the inductor's current in a buck converter. 3 PGND Power Ground: The ground pin for the power section of the IC. 4 VOUT Output Voltage Pin: The pin that provides the regulated output voltage. 5 SS/EN Soft-Start/Enable Pin: This pin is used for enabling or disabling the IC. It also controls the soft-start function. 6 FB Feedback Pin: This pin is connected to a resistor divider to set the output voltage. 7 COMP Compensation Pin: Used for external frequency compensation in the feedback loop. 8 PGOOD Power Good Pin: This output signal indicates whether the output voltage is within a specified tolerance. 9 NC No Connect Pin: This pin is not internally connected and should not be used. 10 PGND Power Ground: Another ground pin for the power section. 11 SW Switch Pin: Second switch pin, used for controlling current inductor switching. 12 VIN Input Voltage Pin: The pin where input voltage is supplied. 13 VOUT Output Voltage Pin: Supplies the regulated output voltage. 14 EN Enable Pin: Activates the device when connected to a logic-high level. 15 VIN Input Voltage Pin: For input voltage supply. 16 VOUT Output Voltage Pin: Supplies output regulated voltage to the load.

Circuit Principle

The TPS563201DDCR operates as a buck converter, designed to step down a higher input voltage to a lower, stable output voltage. The main components inside the IC are:

Internal Switching transistor : It uses this transistor to convert the high input voltage to a low output voltage. Inductor and capacitor : These components are used to smooth out the current and voltage fluctuations during switching, providing a steady DC output. Feedback Loop: The feedback pin (FB) is used to compare the output voltage with the reference voltage, adjusting the duty cycle of the switch to maintain a stable output.

The control loop inside the IC continuously adjusts the switching duty cycle based on the feedback signal to ensure the output voltage stays regulated according to the user's requirements.

FAQ (Frequently Asked Questions)

Here are 20 frequently asked questions about the TPS563201DDCR and its pinout functionality:

What is the input voltage range for the TPS563201DDCR? The input voltage range is 4.5V to 17V, ensuring compatibility with various voltage sources. Can the TPS563201DDCR work without an external inductor? No, an external inductor is required for proper operation to smooth out the current during switching. What is the function of the SW pin? The SW pin connects to the external inductor, controlling the switching behavior of the converter. How do I enable the TPS563201DDCR? The IC is enabled by applying a logic-high signal to the EN pin. What is the purpose of the FB pin? The FB pin is used to sense the output voltage and adjust the feedback loop for voltage regulation. What should be connected to the PGOOD pin? The PGOOD pin is an open-drain output that indicates if the output voltage is within a specified tolerance. What does the COMP pin do? The COMP pin is used for external frequency compensation in the feedback loop to stabilize the system. Is it possible to use the TPS563201DDCR with higher input voltages than 17V? No, the maximum recommended input voltage is 17V, and exceeding this can damage the device. How do I set the output voltage? The output voltage is set by an external resistor divider connected to the FB pin.

What is the maximum output current that the TPS563201DDCR can provide?

The IC is capable of delivering a maximum output current of 2A.

How can I disable the TPS563201DDCR?

To disable the IC, pull the EN pin low.

What type of capacitor is recommended for the output?

A low ESR ceramic capacitor is recommended for stabilizing the output voltage.

Is the TPS563201DDCR thermally protected?

Yes, the device includes thermal shutdown protection to prevent overheating.

What is the switching frequency of the TPS563201DDCR?

The switching frequency is typically 1.2 MHz, but it can be adjusted with external components.

Can the device work in parallel to share the load current?

No, the TPS563201DDCR is not designed for parallel operation.

Is there a specific layout requirement for the PCB?

Yes, careful PCB layout is important to ensure optimal performance, especially around the input and output capacitors.

What is the power consumption of the TPS563201DDCR?

The power consumption depends on the input voltage, output voltage, and load current but is typically low due to its efficient design.

Can I use the TPS563201DDCR for buck-boost applications?

No, this IC is designed specifically for buck (step-down) applications only.

What is the recommended input and output capacitance?

The input capacitor is typically 10µF, and the output capacitor is recommended to be at least 22µF for stable operation.

What is the recommended temperature range for operation?

The recommended operating temperature range for the TPS563201DDCR is -40°C to 125°C.

This document should give you a comprehensive understanding of the TPS563201DDCR pinout, its operation in a buck converter circuit, and common troubleshooting FAQs.