TPS25942ARVCR Detailed explanation of pin function specifications and circuit principle instructions
The "TPS25942ARVCR" is a product from Texas Instruments. It is a load switch or Power path controller designed to protect downstream devices from overcurrent conditions, allowing for safe power distribution in systems.
Package Type and Pin Configuration:
The "TPS25942ARVCR" is typically available in a VQFN-24 package, which has 24 pins.
Now, let's go over the detailed explanation of the pin functions for the 24-pin configuration:
Pin Function Table for TPS25942ARVCR:
Pin Number Pin Name Function Description 1 VBUS This is the input voltage supply for the device, usually the power source that the TPS25942ARVCR will regulate or control. 2 GND Ground pin. This provides the reference ground for the entire device. 3 EN Enable pin. This controls the activation of the switch. When high, the switch turns on; when low, the switch is off. 4 ILIM Current limit pin. This is used to set the current limit threshold by an external resistor to protect the downstream circuit from overcurrent conditions. 5 VOUT Output voltage pin. This is the voltage output to the downstream system that the TPS25942ARVCR is controlling. 6 FLAG This is a fault flag pin that indicates whether there is a fault condition, such as overcurrent, thermal shutdown, or undervoltage lockout. 7 FETG FET gate control. This pin is used to control the MOSFET gate for enabling or disabling the switch. 8 FETD FET drain pin. Connects to the source of the MOSFET or switch, often used for system protection in the form of a power path controller. 9 NC No Connect. This pin is not connected internally and is not used for any functional purposes. 10 FLT Fault indicator. This pin provides a status flag indicating an error condition like overcurrent or thermal shutdown. 11 TST Test pin. This is used for test purposes and should be connected to a proper test configuration for verification during the manufacturing process. 12 TSET Set test pin. It may be used for a specific setup configuration or for controlling certain test parameters during board testing. 13 VREG Regulated voltage pin. This pin provides a stable voltage for internal circuitry to function. 14 PWRGD Power good pin. Indicates that the output voltage is within the proper operating range and that the output is healthy. 15 OVP Overvoltage protection. This pin monitors and protects the system if the output voltage exceeds a specified threshold. 16 UVLO Undervoltage lockout pin. This pin monitors the input voltage to ensure that the TPS25942ARVCR operates only when the input voltage is above a predefined threshold. 17 TSD Thermal shutdown pin. If the device exceeds a safe temperature, this pin will trigger a thermal shutdown to protect the device from overheating. 18 CTRLD Control pin for the device to enable or disable certain internal features. 19 SENSE Current sensing input. This pin monitors the current flowing through the switch for overcurrent protection. 20 OUT Output pin for power delivery. It connects the power supply to the load after regulation and protection. 21 VIN Input voltage pin. It provides the main power input to the device, often used for control and regulation purposes. 22 VCC Main supply voltage pin for internal circuitry. 23 EN_SENSE Enable sense pin. This pin is used to determine when to activate the enable feature based on certain conditions. 24 NC No Connect. This pin is not connected internally and is not used for any functional purposes.20 Frequently Asked Questions (FAQ) for TPS25942ARVCR
Q: What is the maximum input voltage for the TPS25942ARVCR? A: The maximum input voltage for the TPS25942ARVCR is 16V.
Q: How do I set the current limit for the TPS25942ARVCR? A: The current limit is set via an external resistor connected to the ILIM pin, which adjusts the current threshold for overcurrent protection.
Q: What happens if the temperature exceeds the safe operating range? A: If the temperature exceeds the safe limit, the device will enter thermal shutdown mode to prevent damage to the internal circuitry.
Q: What is the purpose of the FLAG pin? A: The FLAG pin provides an indication when the device encounters fault conditions such as overcurrent, undervoltage, or thermal shutdown.
Q: Can I disable the fault flag output? A: No, the fault flag output is integral to the device's operation and cannot be disabled. It serves as an essential indicator for the protection features.
Q: What is the recommended external component for the ILIM pin? A: You should connect an external resistor to the ILIM pin to set the current limit threshold as per your system's requirements.
Q: How does the TPS25942ARVCR protect against overvoltage? A: The OVP pin monitors the output voltage and triggers protection if the voltage exceeds a predefined limit to prevent damage to downstream components.
Q: What is the significance of the PWRGD pin? A: The PWRGD pin indicates whether the output voltage is within the acceptable range, signaling whether the system is operating correctly.
Q: How can I test the TPS25942ARVCR? A: The TST and TSET pins are used for test purposes during manufacturing and should be configured as per the testing requirements.
Q: What happens when the EN pin is low? A: When the EN pin is low, the switch inside the TPS25942ARVCR is turned off, and no power is delivered to the output.
Q: How do I know when there is an overcurrent event? A: The device will activate the FLT pin to indicate a fault condition, such as overcurrent, and will disable the output to protect the system.
Q: What is the function of the FETG pin? A: The FETG pin is used to control the gate of the MOSFET, enabling or disabling the switch within the TPS25942ARVCR.
Q: Can the TPS25942ARVCR operate with low input voltages? A: Yes, the TPS25942ARVCR is designed to operate with input voltages as low as 2.7V, making it suitable for a wide range of systems.
Q: What should I do if the device goes into thermal shutdown? A: If the device enters thermal shutdown, you should allow it to cool down and ensure that the ambient temperature is within the recommended range.
Q: Is there a way to monitor the current flowing through the device? A: Yes, the device provides a current sensing feature via the SENSE pin to monitor the current flowing through the switch.
Q: Can the TPS25942ARVCR handle high inrush currents? A: Yes, the TPS25942ARVCR is designed to handle inrush currents while providing protection for the system.
Q: How do I configure the UVLO feature? A: The UVLO feature is automatically enabled when the input voltage drops below the configured threshold, and it helps prevent the device from operating at low voltages.
Q: How do I connect the TPS25942ARVCR to a power source? A: The VIN pin should be connected to your power source, and the VOUT pin will connect to the output system that is being regulated.
Q: How do I handle a fault condition? A: When a fault condition occurs, the device disables the output, and the FLAG or FLT pin will indicate the fault status. You can reset the device by removing and reapplying the enable signal.
Q: Can I use the TPS25942ARVCR in high-power applications? A: Yes, the TPS25942ARVCR is designed to handle power up to 2A, making it suitable for many high-power applications requiring current regulation and protection.
If you have any more questions, feel free to ask!
