Overview
The onsemi NCP380HSN10AAT1G is a high-side power distribution switch designed to manage and protect power supply lines in various electronic systems. This device is part of the NCP380 series and is particularly suited for applications where heavy capacitive loads and short circuits are likely to occur. It features an integrated P-channel MOSFET that limits output current to a desired level, preventing damage from overcurrent and short-circuit conditions. The switch also includes several protection mechanisms such as thermal shutdown, undervoltage lockout, and reverse-voltage detection, ensuring robust and reliable operation.
Key Specifications
| Configuration | High Side |
|---|---|
| Input Voltage | 2.5V to 5.5V |
| No of Elements | Single |
| On-state Resistance-Max | 110mΩ |
| Rated Current-Max | 1A |
| Type | Power Distribution Switch |
| Package Style | SC-74A (TSOP-5, SOT-25) |
| Mounting Method | Surface Mount |
| Ambient Temperature Range | -40°C to +85°C |
| Junction Temperature Range | -40°C to +125°C |
| Thermal Shutdown Threshold | 140°C |
| FLAG Output Low Voltage | 400 mV (IFLAG = 1 mA) |
Key Features
- Current Limiting: The device switches into a constant-current regulation mode when the output current exceeds the current-limit threshold or a short is present. The current-limit threshold can be user-adjustable or internally fixed.
- Protection Mechanisms: Includes thermal shutdown, undervoltage lockout, and reverse-voltage detection to protect the device and connected components.
- FLAG Indicator: An open-drain output that asserts low during overcurrent, reverse-voltage, or overtemperature conditions, providing real-time fault indication.
- Soft Start Circuitry: Helps in limiting large current and voltage surges during startup, especially with heavy capacitive loads.
- Logic Enable Input: The power switch can be controlled by a logic enable input that can be either active high or low.
Applications
- USB Ports and Hubs: Ideal for protecting USB ports from overcurrent and short-circuit conditions, ensuring safe and reliable operation.
- Power Supply Systems: Used in various power supply systems to manage and protect against heavy capacitive loads and short circuits.
- Consumer Electronics: Suitable for use in consumer electronics such as smartphones, tablets, and other portable devices to ensure safe power distribution.
- Industrial Automation: Can be used in industrial automation systems to protect against overcurrent and other fault conditions.
Q & A
- What is the input voltage range for the NCP380HSN10AAT1G?
The input voltage range is from 2.5V to 5.5V.
- What is the maximum rated current for this device?
The maximum rated current is 1A).
- What type of package does the NCP380HSN10AAT1G come in?
The device comes in a SC-74A (TSOP-5, SOT-25) package).
- How does the device protect against overcurrent conditions?
The device switches into a constant-current regulation mode when the output current exceeds the current-limit threshold, limiting the output current to a safe level).
- What is the purpose of the FLAG pin?
The FLAG pin is an open-drain output that asserts low during overcurrent, reverse-voltage, or overtemperature conditions, providing real-time fault indication).
- What is the thermal shutdown threshold for this device?
The thermal shutdown threshold is 140°C).
- Can the current-limit threshold be adjusted?
Yes, the current-limit threshold can be user-adjustable using an external resistor for the adjustable version).
- What is the ambient temperature range for the NCP380HSN10AAT1G?
The ambient temperature range is from -40°C to +85°C).
- How does the device handle reverse-voltage conditions?
The device includes an internal reverse-voltage detection comparator that disables the power switch if the output voltage is higher than the input voltage).
- What is the purpose of the soft start circuitry?
The soft start circuitry helps in limiting large current and voltage surges during startup, especially with heavy capacitive loads).
