The part number TPS63802DLAR is from Texas Instruments. This device is a boost converter used for Power management applications, particularly in the context of low-power devices. Below is a detailed explanation of the pin functions, packaging details, and a list of frequently asked questions (FAQ) along with comprehensive explanations of each pin's role in the circuit.
TPS63802DLAR Pin Function and Specifications
Device: TPS63802DLAR Manufacturer: Texas Instruments Package: QFN-20 (20 pins)Pinout Description (20 Pins)
Pin Number Pin Name Function 1 IN Power input pin (typically 2.3V to 5.5V) to supply the device. 2 EN Enable pin. Pull high to enable the device, pull low to disable. 3 FB Feedback pin to control the output voltage regulation. 4 SW Switch node. This is the connection between the inductor and the internal switch. 5 VOUT Output voltage pin. Provides the regulated output voltage to the load. 6 AGND Analog ground pin. Used as the reference for analog circuitry. 7 PGND Power ground pin. Provides the return path for the high current power ground. 8 BOOT Bootstrapped capacitor pin. Used to drive the internal MOSFET gate. 9 VDD Internal voltage supply pin. Typically connected to a 5V source. 10 COMP Compensation pin for regulating the control loop of the boost converter. 11 SS Soft-start pin. This pin is used to control the ramp-up time of the output voltage. 12 SENSE Current sensing pin for output current protection and regulation. 13 EXTVCC External voltage supply pin to power the internal circuitry when required. 14 PGOOD Power good indicator pin. This pin goes high when the output voltage is within specifications. 15 N/C No connection pin. This pin is not internally connected to any circuitry. 16 N/C No connection pin. This pin is not internally connected to any circuitry. 17 N/C No connection pin. This pin is not internally connected to any circuitry. 18 N/C No connection pin. This pin is not internally connected to any circuitry. 19 VOUT2 Secondary output voltage pin (if applicable). 20 GND Ground pin. Connect this pin to the system ground.Pin Function FAQ (Frequently Asked Questions)
Q: What is the input voltage range for TPS63802DLAR? A: The TPS63802DLAR supports an input voltage range of 2.3V to 5.5V. Q: How do I enable the TPS63802DLAR? A: To enable the TPS63802DLAR, drive the EN (pin 2) high. Q: Can I disable the TPS63802DLAR? A: Yes, to disable the device, pull the EN (pin 2) low. Q: What is the purpose of the FB pin (pin 3)? A: The FB pin is used to set the output voltage by providing feedback to the controller. Q: What should I connect to the SW pin (pin 4)? A: The SW pin connects to the inductor and internal switch to regulate energy conversion. Q: What is the output voltage range of the TPS63802DLAR? A: The output voltage is typically regulated to a value set by the feedback resistor network. Q: What is the purpose of the AGND pin (pin 6)? A: The AGND pin is the analog ground, providing a reference for the analog circuitry. Q: What is the difference between AGND and PGND pins? A: AGND (pin 6) is for analog signals, while PGND (pin 7) is used for power ground connections. Q: How do I connect the BOOT pin (pin 8)? A: The BOOT pin is used to connect to a bootstrap capacitor, enabling proper operation of the MOSFET gate.Q: Can I connect an external voltage to the VDD pin (pin 9)?
A: Yes, the VDD pin can be connected to an external supply, typically 5V.Q: What is the function of the COMP pin (pin 10)?
A: The COMP pin is used to control the feedback loop stability and response.Q: How does the soft-start function work (pin 11)?
A: The SS pin controls the ramp-up time of the output voltage, reducing inrush current.Q: What is the SENSE pin used for?
A: The SENSE pin monitors the output current for protection and regulation purposes.Q: What is the purpose of the EXTVCC pin (pin 13)?
A: The EXTVCC pin allows for an external supply to power the internal circuitry when needed.Q: What does the PGOOD pin indicate?
A: The PGOOD pin signals when the output voltage is within acceptable limits.Q: What should I do if pins 15-18 are not connected?
A: These pins (N/C) are not used and should be left unconnected.Q: What is the VOUT2 pin used for?
A: The VOUT2 pin provides an additional output voltage, depending on the design.Q: What is the function of the GND pin (pin 20)?
A: The GND pin is the main ground reference for the entire device.Q: Can I use a different type of capacitor for the bootstrap capacitor at BOOT (pin 8)?
A: It is recommended to use a ceramic capacitor for optimal performance.Q: How do I protect the TPS63802DLAR from overvoltage or overcurrent?
A: The device has built-in protections for overcurrent and overvoltage, but it is also important to select appropriate components (e.g., inductors, capacitors) to match the expected load.This detailed list covers the essential pin functions, packaging, and FAQs related to the TPS63802DLAR. If you need further assistance or clarification on any point, feel free to ask!
