The part number you provided, TPS548D22RVFR, refers to a product from Texas Instruments (TI). This is a DC/DC buck converter designed to regulate voltage efficiently in various Power applications, specifically with a high level of integration for ease of use in applications like industrial control, communication equipment, and consumer electronics.
Package and Pinout Specifications:
The TPS548D22RVFR comes in a VQFN-24 package, which has 24 pins. This type of package is a Quad Flat No-leads package (QFN), which allows for efficient heat dissipation and smaller form factors. The key features of this package include a 24-pin configuration and thermally enhanced leadless package, ideal for applications where board space is limited.Pin Function Table:
Below is a detailed Pin Function Description for the 24 pins of the TPS548D22RVFR in the VQFN-24 package. Each pin has a specific role in ensuring the proper functionality of the power converter.
Pin Number Pin Name Function Description 1 VOUT Output voltage pin, typically connected to the load. Provides regulated output voltage. 2 VDD Supply voltage pin. Connects to the input power supply voltage. 3 VSS Ground pin. Connects to the system ground. 4 SW1 Switch node 1. Connected to the inductor and the switching element (MOSFET). 5 SW2 Switch node 2. Provides a connection for the second inductor, used in dual-phase operation. 6 PGND Power ground pin. Connects to the negative side of the power system. 7 VFB Feedback voltage pin. Used to sense the output voltage and regulate it accordingly. 8 EN Enable pin. Pulling high enables the output, pulling low disables it. 9 COMP Compensation pin. Used to stabilize the control loop of the converter. 10 RT/CLK Timing resistor or clock input for setting switching frequency. 11 BOOT Bootstrapped voltage pin. Connects to a capacitor and provides voltage to drive the high-side MOSFET. 12 PGND Power ground pin (again for redundancy or dual-phase operation). 13 VDDIN Input supply voltage. Connects to the input voltage source. 14 PHASE Phase pin for detecting the phase of the switching node. 15 SS/TRACK Soft start or tracking pin for managing power-up sequence or synchronization with another rail. 16 PGOOD Power good signal. Indicates whether the output voltage is within acceptable limits. 17 ILIM Current limit pin. Helps to monitor and set current limit parameters. 18 NC No connection. These pins are not internally connected. Can be left floating. 19 NC No connection (same as above). 20 PGND Ground pin used for high-current paths in the power conversion. 21 VOUT_SENSE Output voltage sense pin for accurate output monitoring. 22 FREQ Frequency control pin. Adjusts the switching frequency for different load conditions. 23 IADJ Current adjust pin for fine-tuning the output current limit. 24 VIN Input voltage pin. Connects to the input DC supply voltage.FAQ - Common Questions Regarding TPS548D22RVFR
Q: What is the operating voltage range for the TPS548D22RVFR? A: The operating voltage range for the TPS548D22RVFR is from 4.5V to 17V on the input (VDD) pin.
Q: How can I adjust the output voltage of the TPS548D22RVFR? A: The output voltage is set by a feedback resistor network connected to the VFB pin.
Q: What is the frequency range for the TPS548D22RVFR? A: The switching frequency for the TPS548D22RVFR can be adjusted from 200kHz to 2.5MHz using the external RT resistor.
Q: How do I enable or disable the TPS548D22RVFR? A: The device is enabled by pulling the EN pin high, and it is disabled by pulling the EN pin low.
Q: What does the PGOOD pin indicate? A: The PGOOD pin indicates whether the output voltage is within regulation. A high signal indicates proper output, while a low signal indicates an out-of-range condition.
Q: What is the purpose of the BOOT pin on the TPS548D22RVFR? A: The BOOT pin is used to provide a bootstrap voltage for driving the high-side MOSFET. This is required for switching the MOSFET efficiently.
Q: Can the TPS548D22RVFR handle multiple outputs? A: Yes, the TPS548D22RVFR can operate in a multi-phase configuration to handle multiple outputs effectively.
Q: What are the thermal considerations for the TPS548D22RVFR? A: The device has a thermally enhanced QFN package designed for better heat dissipation. It is important to have sufficient PCB copper area for heat sinking.
Q: What is the typical efficiency of the TPS548D22RVFR? A: The typical efficiency for the TPS548D22RVFR is up to 95%, depending on the input voltage and output load conditions.
Q: How can I configure the soft start feature of the TPS548D22RVFR? A: The soft start feature is controlled by the SS/TRACK pin. You can set an external capacitor to adjust the soft start time.
Q: What is the function of the PHASE pin on the TPS548D22RVFR? A: The PHASE pin is used for detecting the phase of the switching node in dual-phase operation, ensuring proper synchronization.
Q: What happens if the input voltage drops below the specified range? A: If the input voltage drops below the specified range (4.5V), the TPS548D22RVFR will stop operating and the output voltage will no longer be regulated.
Q: How does the TPS548D22RVFR handle overcurrent conditions? A: The device includes overcurrent protection and can limit the output current to prevent damage. This is monitored via the ILIM pin.
Q: What is the maximum output current of the TPS548D22RVFR? A: The maximum output current of the TPS548D22RVFR is 2A, making it suitable for low to medium-power applications.
Q: Can the TPS548D22RVFR be used for high-power applications? A: The TPS548D22RVFR is designed for medium-power applications up to 2A output. For higher power, other TI devices in the same family may be more suitable.
Q: What is the role of the VOUTSENSE pin? A: The VOUTSENSE pin is used to sense the output voltage and ensure that it stays within the desired range.
Q: What is the VQFN package type? A: The VQFN package is a leadless, thermally enhanced package that offers a compact size and good thermal performance.
Q: Can the TPS548D22RVFR be used in automotive applications? A: Yes, the TPS548D22RVFR is suitable for industrial and automotive applications, as it is designed to operate within a wide temperature range.
Q: How do I connect the feedback network for voltage regulation? A: The feedback network is connected to the VFB pin. It typically consists of two resistors to set the desired output voltage.
Q: Does the TPS548D22RVFR support external synchronization? A: Yes, the device can be externally synchronized using the RT/CLK pin, allowing it to synchronize with other converters in multi-phase applications.
This information should provide a detailed overview of the TPS548D22RVFR. Let me know if you need any more specifics!