TPS548B22RVFR Detailed explanation of pin function specifications and circuit principle instructions
The TPS548B22RVFR is a product from Texas Instruments (TI), which is a company that designs and manufactures semiconductors and integrated circuits.
Packaging and Pin Function Specifications for the TPS548B22RVFR
The TPS548B22RVFR is a DC-DC buck converter, designed to step down voltage for various applications, primarily in Power regulation. The part is housed in a VQFN-28 package, which stands for Very Thin Quad Flat No-lead (28-pin) package.
Here’s the detailed description of the pin functions:
Pin Function List for TPS548B22RVFR
Pin Number Pin Name Pin Function Description 1 PGND Power ground pin; used for the low-side current path. 2 AGND Analog ground pin; used for the analog circuitry and signal return. 3 VDD Input voltage supply pin (Power input to the device). 4 EN Enable pin; logic high enables operation, logic low disables it. 5 VSENSE Voltage sense pin for feedback to regulate output voltage. 6 COMP Compensation pin; used to adjust the loop compensation. 7 FB Feedback pin; used to monitor output voltage and feedback for regulation. 8 SS Soft start pin; controls the time taken for the output to ramp to the desired value. 9 SYNC Synchronization pin; used to synchronize the switching frequency with an external clock. 10 BOOT Bootstrap pin; used for providing voltage to the high-side MOSFET gate driver. 11 SW1 Switch node; connection to the inductor and high-side MOSFET. 12 SW2 Switch node; connection to the low-side MOSFET. 13 OUT Output voltage; provides the regulated voltage for the load. 14 PG Power good output; logic low indicates that the output voltage is out of regulation. 15 PGND2 Ground for the second power stage; used in the switching node. 16 HSDRV High-side driver pin; drives the high-side MOSFET gate. 17 LSDRV Low-side driver pin; drives the low-side MOSFET gate. 18 ILIM Current limit pin; used to set the current limit for the converter. 19 VOUT Output voltage pin; used to connect external capacitor s to filter the output. 20 VREF Reference voltage pin; used to set the reference voltage for feedback. 21 TSD Thermal shutdown pin; prevents operation if the internal temperature exceeds safe limits. 22 FAULT Fault indicator pin; logic high indicates a fault condition. 23 VDRV Driver voltage pin; provides voltage to the gate drivers. 24 NC No connection pin; may be left unconnected. 25 NC No connection pin; may be left unconnected. 26 NC No connection pin; may be left unconnected. 27 NC No connection pin; may be left unconnected. 28 NC No connection pin; may be left unconnected.FAQs About the TPS548B22RVFR
Q: What is the TPS548B22RVFR and its primary application? A: The TPS548B22RVFR is a DC-DC buck converter used primarily for stepping down voltage in power management applications.
Q: What is the input voltage range for the TPS548B22RVFR? A: The TPS548B22RVFR operates with an input voltage range from 4.5V to 14V.
Q: How many pins does the TPS548B22RVFR have in its VQFN package? A: The TPS548B22RVFR comes in a 28-pin VQFN package.
Q: What is the function of the EN pin on the TPS548B22RVFR? A: The EN pin enables or disables the device. A logic high enables operation, and a logic low disables it.
Q: Can the TPS548B22RVFR be used to regulate output voltage? A: Yes, the FB (feedback) pin is used to monitor and regulate the output voltage to the desired level.
Q: What is the purpose of the SYNC pin on the TPS548B22RVFR? A: The SYNC pin is used to synchronize the switching frequency of the converter with an external clock signal.
Q: What does the PG (Power Good) pin indicate? A: The PG pin indicates whether the output voltage is within regulation. A logic low indicates a fault or that the output is out of regulation.
Q: How is the soft-start function controlled on the TPS548B22RVFR? A: The SS (soft-start) pin is used to control the soft-start time, which is the time taken for the output voltage to ramp up.
Q: What is the maximum operating temperature of the TPS548B22RVFR? A: The maximum operating temperature for the TPS548B22RVFR is 125°C.
Q: Can the TPS548B22RVFR be used for high current applications? A: Yes, the TPS548B22RVFR is designed to deliver up to 2.2A of output current.
Q: What are the current limit settings for the TPS548B22RVFR? A: The ILIM pin is used to set the current limit for the converter, preventing excessive current from flowing through the circuit.
Q: How does the TPS548B22RVFR handle thermal protection? A: The TSD pin provides thermal shutdown protection to prevent damage when the internal temperature exceeds safe limits.
Q: What is the role of the BOOT pin? A: The BOOT pin is used to supply voltage to the high-side MOSFET gate driver for proper switching operation.
Q: What does the VSENSE pin do? A: The VSENSE pin is used to sense the output voltage and provides feedback to ensure that the output voltage remains regulated.
Q: How is the output voltage regulated on the TPS548B22RVFR? A: The FB pin (feedback) monitors the output voltage and compares it with the reference voltage to regulate the output.
Q: What is the recommended external component for the TPS548B22RVFR? A: External components such as inductors and capacitors must be selected based on the design requirements, with the typical recommendations outlined in the datasheet.
Q: What are the key features of the TPS548B22RVFR? A: Key features include high efficiency, adjustable output voltage, thermal shutdown, and current limit protection.
Q: What is the function of the LSDRV pin? A: The LSDRV pin is responsible for driving the gate of the low-side MOSFET during the switching cycle.
Q: Is the TPS548B22RVFR suitable for automotive applications? A: Yes, the TPS548B22RVFR is AEC-Q100 qualified, making it suitable for automotive applications.
Q: How is the current flowing in the circuit monitored in the TPS548B22RVFR? A: The ILIM pin sets the current limit threshold, ensuring that the current remains within safe operating levels.
This description, including the detailed pinout and FAQs, should give you a comprehensive understanding of the TPS548B22RVFR and its functionality.
