Overview
The NCP3902FCCTBG, produced by onsemi, is a high-voltage, high-current, bidirectional load switch designed to support dual input applications. This component is particularly useful in devices that need to charge from both USB and wireless sources, such as smartphones, handheld devices, and tablets. It integrates input overvoltage and surge protection, as well as reverse-blocking of output voltage, ensuring robust protection against various electrical stresses.
The NCP3902 allows for autonomous or slave mode operation, enabling flexible integration with system controllers and wireless charging receivers. Its low switch resistance and high current capability make it suitable for handling higher current loads efficiently.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| DC Input Voltage Operating Range | 3.0 | - | 20 | V |
| DC Absolute Maximum Input Voltage | -0.3 | - | 28 | V |
| Overvoltage Protection Levels | - | 13 V / 17 V | - | V |
| Surge Protection Compliance | - | IEC61000-4-5 at 100 V | - | - |
| Switch On-resistance | - | 23 mΩ | - | Ω |
| DC Nominal Current Capability | - | 3 A | - | A |
| DC Maximum Current Capability | - | - | 5 A | A |
| Input Supply Detect Deglitcher in Autonomous Mode | - | 50 ms | - | ms |
| Break-before-make Timing with Discharge | - | 50 ms | - | ms |
| Storage Temperature Range | -65 | - | 150 | °C |
Key Features
- Dual Input Support: Allows charging from both USB and wireless sources.
- Overvoltage and Surge Protection: Protects against high DC or transient voltages and surges up to 100 V compliant with IEC61000-4-5.
- Reverse Blocking Protection: Prevents backflow of voltage from the output to the USB input.
- Low Switch Resistance: Typical on-resistance of 23 mΩ, enabling high current handling.
- Autonomous and Slave Mode Operation: Flexible operation modes to suit different system requirements.
- Voltage Protected Sense Output: Provides a clamped version of the USB input voltage for system sensing.
- Bi-directional Status Indicator and OTG Enable Pin: Enhances control and monitoring capabilities.
- Pb-Free and RoHS Compliant: Environmentally friendly packaging.
Applications
- Smartphones: Ideal for devices that require charging from multiple sources.
- Handheld Devices: Suitable for portable electronics needing robust power management.
- Tablets: Enhances power management in tablet devices with multiple charging options.
Q & A
- What is the primary function of the NCP3902FCCTBG?
The NCP3902FCCTBG is a high-voltage, high-current, bidirectional load switch that supports dual input applications, providing overvoltage and surge protection.
- What are the operating voltage ranges for the NCP3902FCCTBG?
The DC input voltage operating range is from 3.0 V to 20 V, with an absolute maximum input voltage of 28 V.
- What kind of protection does the NCP3902FCCTBG offer?
The component offers overvoltage protection, surge protection compliant with IEC61000-4-5, and reverse-blocking of output voltage.
- What are the current handling capabilities of the NCP3902FCCTBG?
The device can handle a nominal current of 3 A and a maximum current of 5 A.
- Can the NCP3902FCCTBG operate in different modes?
Yes, it can operate in both autonomous and slave modes.
- How does the NCP3902FCCTBG handle input supply detection?
The device includes a 50 ms input supply detect deglitcher in autonomous mode.
- What is the purpose of the voltage protected sense output (USB_SNS)?
The USB_SNS pin provides a clamped version of the USB input voltage, limiting it to a selected maximum level for system sensing.
- Is the NCP3902FCCTBG environmentally friendly?
Yes, the device is Pb-Free and RoHS compliant.
- What are the typical applications of the NCP3902FCCTBG?
It is commonly used in smartphones, handheld devices, and tablets.
- How does the overvoltage protection work in the NCP3902FCCTBG?
The overvoltage protection level is selectable via the VP pin, and the switch opens asynchronously when an overvoltage is detected.
