The part number "TPS54340DDAR" belongs to Texas Instruments (TI), which is a well-known semiconductor manufacturer.
Overview
Model: TPS54340DDAR Manufacturer: Texas Instruments Package Type: DDAR refers to a VQFN (Very Thin Quad Flat No-lead) package, specifically a 16-pin VQFN package. Category: DC-DC buck converterPin Function Specifications
The TPS54340 is a 3A, 60V buck converter with a wide input voltage range and high efficiency. Below is the detailed pin function list and explanation for all 16 pins, as well as the corresponding usage in the circuit:
Pin Number Pin Name Pin Function Description 1 VIN Input Voltage Pin: Connect to the input voltage supply. The input voltage range is 4.5V to 60V. 2 VOUT Output Voltage Pin: This is the output pin where the regulated DC voltage is provided to the load. This pin connects to the load circuit. 3 PGND Power Ground Pin: Connect to the system ground. This pin serves as the return path for the output current. 4 SW Switch Node Pin: This pin connects to the inductor. It provides the switching node for the internal MOSFET during operation. 5 VDD Bias Supply Pin: Used for internal regulation of the device, typically connected to a 5V supply or external bias voltage. 6 EN Enable Pin: Logic input to enable or disable the device. When driven high, the device operates. When low, it is in shutdown mode. 7 FB Feedback Pin: This pin is connected to the feedback network that controls the output voltage. It should be connected to a voltage divider that sets the output voltage. 8 COMP Compensation Pin: This pin connects to the external compensation network to set the stability of the regulator. 9 SS Soft-Start Pin: Used for controlling the startup time of the converter to limit inrush current. 10 RT Timing Resistor Pin: This pin is used to set the switching frequency by connecting a resistor to ground. 11 BOOT Bootstrapped Pin: Connects to a capacitor that provides the supply for the high-side MOSFET. 12 LX Inductor Pin: This pin connects to the inductor and provides the switching node for the low-side MOSFET during operation. 13 PG Power Good Pin: This pin indicates the status of the output voltage. A logic-high indicates the output voltage is within the regulation limits. 14 OVP Overvoltage Protection Pin: Connect to the voltage sense circuit to monitor for overvoltage conditions. 15 UVLO Undervoltage Lockout Pin: Monitors the input voltage to disable the converter if the input voltage falls below a certain threshold. 16 AGND Analog Ground Pin: This is the analog ground, separate from the power ground pin. It connects to the return path for the feedback circuitry and other sensitive circuits.General Usage Instructions:
Input Voltage (VIN): This pin should be connected to a stable DC voltage supply ranging from 4.5V to 60V to power the converter. Feedback (FB): A resistor divider is used to set the output voltage on this pin. Output Voltage (VOUT): This is the regulated output voltage that powers the load. Enable (EN): A high logic level enables the device, and a low logic level disables it. It can be connected to a control signal or a constant high logic level to keep the device enabled. Switch Node (SW) & Inductor (LX): These are the switching nodes of the internal MOSFETs , connecting to the inductor to form the converter’s filtering stages.20 FAQ for the TPS54340
Q: What is the input voltage range of the TPS54340DDAR? A: The TPS54340DDAR has an input voltage range from 4.5V to 60V.
Q: How do I set the output voltage of the TPS54340? A: The output voltage is set by connecting a voltage divider to the feedback (FB) pin.
Q: What type of package is the TPS54340DDAR? A: The TPS54340DDAR comes in a 16-pin VQFN (Very Thin Quad Flat No-lead) package.
Q: What is the maximum output current of the TPS54340? A: The TPS54340 can deliver up to 3A of output current.
Q: What is the switching frequency of the TPS54340? A: The default switching frequency is 400kHz, but it can be adjusted with an external resistor.
Q: What is the purpose of the BOOT pin on the TPS54340? A: The BOOT pin is used to supply the high-side MOSFET with voltage through a bootstrap capacitor.
Q: How do I disable the TPS54340? A: To disable the TPS54340, pull the EN (Enable) pin low.
Q: Can I use the TPS54340 in a system with a 48V input? A: Yes, the TPS54340 can operate with input voltages as high as 60V.
Q: What type of capacitor is required for the BOOT pin? A: A ceramic capacitor, typically 0.1μF, is recommended for the BOOT pin.
Q: What is the minimum input voltage for the TPS54340? A: The minimum input voltage for the TPS54340 is 4.5V.
Q: How do I protect my system from undervoltage conditions using the TPS54340? A: The TPS54340 has an Undervoltage Lockout (UVLO) feature that disables the converter if the input voltage drops below a certain threshold.
Q: What is the purpose of the COMP pin on the TPS54340? A: The COMP pin is used to connect an external compensation network for stability and control loop performance.
Q: How can I monitor the output voltage status? A: You can monitor the Power Good (PG) pin, which indicates whether the output voltage is within regulation limits.
Q: Can I adjust the soft-start time of the TPS54340? A: Yes, the soft-start time can be adjusted by connecting a capacitor to the SS pin.
Q: What is the recommended inductor value for the TPS54340? A: A 10μH to 22μH inductor is recommended for typical applications.
Q: Can the TPS54340 be used in automotive applications? A: Yes, the TPS54340 is suitable for automotive applications as it can handle input voltages up to 60V.
Q: How can I protect the system from overvoltage? A: The TPS54340 includes an Overvoltage Protection (OVP) feature that monitors the output voltage and shuts down the converter if an overvoltage condition occurs.
Q: What is the typical efficiency of the TPS54340? A: The typical efficiency of the TPS54340 is up to 95%, depending on the input and output voltages.
Q: Can the TPS54340 operate without the VDD pin connected? A: No, the VDD pin is required to provide the internal bias for the converter.
Q: Is the TPS54340 suitable for high-frequency applications? A: Yes, the TPS54340 is designed to operate efficiently at frequencies up to 400kHz, making it suitable for many applications.
This comprehensive guide should give you a deep understanding of the TPS54340DDAR functionality, its pins, and how to use it effectively in your designs.