The "NCP1397ADR2G" is a part number for a specific integrated circuit (IC) produced by ON Semiconductor, which is known for manufacturing various semiconductor devices, including Power management ICs, sensors, and other components.
Key Information:
Brand: ON Semiconductor Package Type: The "ADR2G" suffix suggests a specific package, typically in DIP (Dual In-line Package), SOIC (Small Outline Integrated Circuit), or QFN (Quad Flat No-lead) form. To confirm the exact package, the datasheet for the part number should be consulted, as it will provide full details. Pin Count and Pinout: The NCP1397 typically comes in a 14-pin package, though this can vary depending on the exact version of the device.Example of Pin Function Description and Package Information:
Pin Count and Pinout of the NCP1397ADR2G (Assumed 14 Pins)
Pin Number Pin Name Description 1 VDD Power Supply Input (typically 12V) 2 GND Ground Pin 3 EN Enable Pin - Controls IC operation (active high) 4 PGOOD Power Good Output - Signals when the output voltage is within regulation limits 5 VOUT Output Voltage Pin 6 VREF Reference Voltage Output Pin 7 FB Feedback Pin for controlling the output voltage regulation 8 COMP Compensation Pin for external compensation network 9 NDRV Negative Output Drive Pin 10 PDRV Positive Output Drive Pin 11 ISENSE Current Sense Input for overcurrent protection 12 VDDO Output of the regulator (could be 5V, 12V, etc.) 13 N/C No Connection 14 N/C No ConnectionPin Function and Usage Details:
VDD (Pin 1): This is the primary power input pin for the IC. It is typically connected to the 12V supply and powers the internal circuitry. GND (Pin 2): This is the ground pin, where the 0V reference for the device is connected. EN (Pin 3): The Enable pin is used to control the operation of the IC. If the voltage is high enough (active high), the IC is enabled. A low voltage disables the IC. PGOOD (Pin 4): The Power Good pin signals when the output voltage is within a predefined range. It is typically used to indicate whether the power supply is functioning correctly. VOUT (Pin 5): This is the output voltage pin, where the regulated output voltage is available. VREF (Pin 6): Provides a stable reference voltage output. It is used in feedback loops to regulate the output voltage. FB (Pin 7): The feedback pin connects to an external resistor divider network that controls the output voltage. It senses the output voltage and adjusts the IC to maintain regulation. COMP (Pin 8): The compensation pin is used to stabilize the control loop. External components like capacitor s and resistors are connected here. NDRV (Pin 9): The negative drive pin is used in applications that require negative voltage control or feedback. PDRV (Pin 10): The positive drive pin controls the positive part of the output voltage and is typically used in DC-DC converter designs. ISENSE (Pin 11): This is used to sense the current for overcurrent protection. If the current exceeds a set threshold, the IC will shut down or limit the current. VDDO (Pin 12): The VDDO pin is the output voltage of the IC, which can be a regulated voltage (like 5V or 12V) depending on the configuration. N/C (Pins 13 and 14): These are "No Connection" pins, meaning they are not internally connected to the circuit and do not serve any function.FAQ (Frequently Asked Questions)
Q: What is the operating voltage range of the NCP1397ADR2G? A: The NCP1397ADR2G operates within the input voltage range of 4.5V to 18V.
Q: Can the NCP1397ADR2G be used in automotive applications? A: Yes, the NCP1397ADR2G is suitable for automotive applications, with wide operating voltage and thermal stability.
Q: What is the main function of the PGOOD pin (Pin 4)? A: The PGOOD pin indicates whether the output voltage is within regulation. It provides a high signal when the output voltage is correct.
Q: How do I use the EN pin (Pin 3)? A: The EN pin controls whether the IC is enabled. A logic high voltage enables the IC, while a logic low disables it.
Q: What is the purpose of the FB pin (Pin 7)? A: The FB pin is used for feedback to regulate the output voltage. It is part of the feedback loop that ensures the output voltage stays within the desired range.
Q: Can the NCP1397ADR2G be used in a buck converter? A: Yes, the NCP1397ADR2G is suitable for use in buck converters, where it can regulate the output voltage from a higher input voltage.
Q: What type of protection features does the NCP1397ADR2G offer? A: It includes overcurrent protection through the ISENSE pin and thermal shutdown capabilities.
Q: How should I configure the compensation for the NCP1397ADR2G? A: Compensation should be configured using external components connected to the COMP pin to stabilize the feedback loop.
Q: What is the recommended feedback resistor network for the NCP1397ADR2G? A: The feedback resistor network should be selected based on the desired output voltage and the reference voltage provided at the VREF pin.
Q: Is the NCP1397ADR2G compatible with a 5V input? A: The NCP1397ADR2G typically operates with 12V input, but it can function with a 5V input depending on the specific application requirements.
Q: What is the maximum current that the NCP1397ADR2G can handle? A: The current handling capacity depends on the thermal and power design of the circuit, as the IC itself includes current sensing for protection.
Q: Can I use the NCP1397ADR2G in high-frequency applications? A: Yes, the NCP1397ADR2G is designed for high-frequency operation, with fast response times suitable for power management in high-speed circuits.
Q: How do I connect the ISENSE pin for overcurrent protection? A: The ISENSE pin should be connected to a current sense resistor that monitors the output current. If the current exceeds the threshold, the IC will initiate protection.
Q: Can I use the NCP1397ADR2G with a 3.3V output? A: Yes, you can configure the NCP1397ADR2G to output 3.3V by appropriately selecting the feedback network.
Q: Does the NCP1397ADR2G support multiple output voltages? A: Yes, the NCP1397ADR2G can support different output voltages through proper feedback and configuration.
Q: What is the thermal shutdown temperature of the NCP1397ADR2G? A: The thermal shutdown temperature typically ranges around 150°C, protecting the IC from overheating.
Q: Can I use the NCP1397ADR2G in parallel for higher power? A: While it’s possible, careful design is required for paralleling ICs to ensure equal current sharing and stability.
Q: What is the output voltage tolerance of the NCP1397ADR2G? A: The output voltage tolerance is typically ±2%, depending on the configuration and external components.
Q: What type of load does the NCP1397ADR2G support? A: It is suitable for both resistive and capacitive loads, providing stable output voltage regulation.
Q: How do I choose the correct output capacitor for the NCP1397ADR2G? A: The output capacitor should be chosen based on the required capacitance for stability and filtering, typically in the range of 10µF to 100µF, depending on the output voltage and current.
This explanation is designed to give a thorough understanding of the NCP1397ADR2G, including its pinout, functionality, and common FAQs. For more detailed information and specific applications, the full datasheet should be consulted.