NCP81295MNTXG Detailed explanation of pin function specifications and circuit principle instructions

The component with the model "NCP81295MNTXG" is from ON Semiconductor. This is a Power management IC often used in voltage regulation systems for various applications, including computing, automotive, and consumer electronics.

Package and Pin Count:

The NCP81295MNTXG typically comes in a QFN-48 (Quad Flat No-lead) package with 48 pins. Each pin in this package serves a specific function to allow the proper operation of the integrated circuit.

Below is a detailed breakdown of the pins and their functions for the NCP81295MNTXG:

Pin Number Pin Name Pin Function Description 1 VDD Power Supply Pin; connects to the power source (usually 5V or 3.3V) 2 VSS Ground Pin; used for system ground connection 3 VREF Reference Voltage Output; provides a stable reference voltage for the IC operation 4 VIN1 Input Voltage Pin; connects to the primary power input source 5 VIN2 Secondary Input Voltage Pin; used for additional power input for specific functions 6 VOUT1 Output Voltage Pin; provides the regulated output voltage for the system 7 VOUT2 Additional Output Voltage Pin; provides another regulated output voltage 8 PGOOD1 Power Good Output; indicates when VOUT1 is within proper operating range 9 PGOOD2 Power Good Output; indicates when VOUT2 is within proper operating range 10 FB1 Feedback Pin for Output 1; used for voltage regulation feedback 11 FB2 Feedback Pin for Output 2; used for voltage regulation feedback 12 SS1 Soft Start Pin for Output 1; controls the ramp-up of the output voltage 13 SS2 Soft Start Pin for Output 2; controls the ramp-up of the output voltage 14 EN1 Enable Pin for Output 1; used to enable or disable the output voltage 15 EN2 Enable Pin for Output 2; used to enable or disable the output voltage 16 SYNC Synchronization Input/Output; used for clock synchronization with other devices 17 COMP1 Compensation Pin for Output 1; used for compensating the feedback loop to stabilize the voltage regulation 18 COMP2 Compensation Pin for Output 2; used for compensating the feedback loop for stability 19 ILIM1 Current Limit Pin for Output 1; limits the current to protect against overload 20 ILIM2 Current Limit Pin for Output 2; limits the current to protect against overload 21 OC1 Overcurrent Protection Pin for Output 1; detects overcurrent conditions 22 OC2 Overcurrent Protection Pin for Output 2; detects overcurrent conditions 23 OVP1 Overvoltage Protection Pin for Output 1; triggers when the output voltage exceeds a threshold 24 OVP2 Overvoltage Protection Pin for Output 2; triggers when the output voltage exceeds a threshold 25 UVP1 Undervoltage Protection Pin for Output 1; triggers when the output voltage falls below a threshold 26 UVP2 Undervoltage Protection Pin for Output 2; triggers when the output voltage falls below a threshold 27 PWM1 Pulse Width Modulation Control for Output 1; adjusts the duty cycle to regulate output voltage 28 PWM2 Pulse Width Modulation Control for Output 2; adjusts the duty cycle to regulate output voltage 29 NC No Connection; this pin has no electrical function but may serve mechanical purposes 30 NC No Connection; this pin has no electrical function but may serve mechanical purposes 31 VDD Power Supply Pin; connects to the power source (usually 5V or 3.3V) 32 VDD Power Supply Pin; connects to the power source (usually 5V or 3.3V) 33 VSS Ground Pin; used for system ground connection 34 VSS Ground Pin; used for system ground connection 35 SW1 Switch Pin for Output 1; controls switching of the output voltage regulation 36 SW2 Switch Pin for Output 2; controls switching of the output voltage regulation 37 RT Resistor/Timer Pin; used to set the switching frequency of the IC 38 CSET1 Capacitor Setting Pin for Output 1; used to set timing or frequency characteristics 39 CSET2 Capacitor Setting Pin for Output 2; used to set timing or frequency characteristics 40 FB3 Feedback Pin for Third Output; used for voltage regulation feedback (if applicable) 41 PGOOD3 Power Good Output for Third Output; indicates proper operation (if applicable) 42 IOUT1 Current Output Pin for Output 1; measures current going through output 1 43 IOUT2 Current Output Pin for Output 2; measures current going through output 2 44 VREF2 Reference Voltage Pin for Secondary Output; provides reference voltage for additional outputs 45 VREF3 Reference Voltage Pin for Third Output; provides reference voltage for third output 46 TSD Thermal Shutdown Pin; monitors IC temperature and disables output in case of overheating 47 FAULT Fault Detection Pin; triggers when a fault condition (overvoltage, overcurrent, thermal) occurs 48 VOUT3 Third Output Voltage Pin; provides a regulated output voltage (if applicable)

FAQs:

What is the main function of the NCP81295MNTXG? The NCP81295MNTXG is a power management IC used to regulate output voltages from an input power supply. It provides multiple output voltage options, soft start control, overcurrent protection, and more.

How many output voltages can the NCP81295MNTXG provide? The NCP81295MNTXG can provide up to 3 output voltages, with pins dedicated to regulating each output.

What is the soft start functionality? The soft start function ensures that the output voltage ramps up gradually to avoid inrush current, which could damage sensitive components.

How do I enable or disable the outputs of the NCP81295MNTXG? Outputs are enabled or disabled via the EN1 and EN2 pins.

What happens if there is an overcurrent condition? The NCP81295MNTXG includes overcurrent protection pins (OC1, OC2) which will trigger a fault condition and protect the IC.

Can I synchronize this IC with other devices? Yes, the NCP81295MNTXG has a SYNC pin for synchronization with other devices.

What is the purpose of the feedback pins (FB1**, **FB2)? These pins are used for voltage regulation feedback to ensure stable output voltages.

How do I monitor the power good status of the outputs? The PGOOD1 and PGOOD2 pins indicate whether the output voltages are within the correct operating range.

Is there any thermal protection in this IC? Yes, the TSD pin monitors the IC's temperature, shutting it down if it overheats.

What are the current limit pins used for? The ILIM1 and ILIM2 pins limit the output current to protect the circuit from overloads.

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