Overview
The NCV7428D15R2G, produced by onsemi, is a System Basis Chip (SBC) designed for automotive and industrial applications. This chip integrates several key functions typically found in Electronic Control Units (ECUs), including a low-voltage power supply, a LIN (Local Interconnect Network) transceiver, and various protection and monitoring features. The NCV7428 ensures a safe power-up sequence, controls mode transitions, and generates reset signals, making it a comprehensive solution for managing power and communication in harsh environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|
| VS (Maximum DC voltage at VS pin) | -0.3 | - | 45 | V | - |
| VOUT (Maximum voltage at VOUT pin) | -0.3 | - | 6 | V | - |
| VLIN (Maximum voltage at LIN bus pin) | -45 | - | 45 | V | - |
| VOUT Supply Output | 3.3 V or 5 V | - | - | V | Depending on the version |
| VOUT Current Capability | - | 70 mA | - | mA | - |
| TJ (Junction temperature range) | -40 | - | 170 | °C | - |
| TSTG (Storage temperature range) | -55 | - | 150 | °C | - |
| VESD (System ESD at pins VS, LIN) | ±14 kV | - | - | kV | IEC 61000-4-2: 330 Ω / 150 pF |
Key Features
- Control Logic: Ensures safe power-up sequence and correct reaction to different supply conditions. Controls mode transitions, including power management and bus wakeup treatment. Generates reset signals.
- Low-drop Voltage Regulator: Provides a 3.3 V or 5 V output, capable of delivering up to 70 mA with ±2% accuracy. Includes undervoltage detection with a reset output to the supplied microcontroller.
- LIN Transceiver: Compliant with LIN2.x and J2602 specifications. Features TxD dominant timeout protection and transceiver mode controlled by a dedicated input pin.
- Protection and Monitoring Functions: Includes thermal shutdown protection, load dump protection (45 V), LIN bus pin protection against transients, and ESD protection level for LIN and VS > ±8 kV.
- Package and Compliance: Available in SOIC-8 package with a wettable flank for enhanced optical inspection quality. AEC-Q100 qualified, PPAP capable, Pb-free, halogen-free/BFR-free, and RoHS compliant.
Applications
- Automotive: Suitable for various automotive systems, including Electronic Control Units (ECUs) and other automotive networks.
- Industrial Networks: Can be used in industrial environments requiring robust communication and power management solutions.
Q & A
- What is the primary function of the NCV7428?
The NCV7428 is a System Basis Chip that integrates functions for low-voltage power supply, LIN transceiver, and various protection and monitoring features, typically used in automotive and industrial applications.
- What are the output voltage options for the VOUT pin?
The VOUT pin can provide either 3.3 V or 5 V, depending on the version of the NCV7428.
- What is the maximum current capability of the VOUT regulator?
The VOUT regulator can deliver up to 70 mA with ±2% accuracy.
- Is the NCV7428 compliant with any specific LIN standards?
Yes, the NCV7428 is compliant with LIN2.x and J2602 specifications.
- What kind of protection does the NCV7428 offer?
The NCV7428 offers thermal shutdown protection, load dump protection (45 V), LIN bus pin protection against transients, and ESD protection level for LIN and VS > ±8 kV.
- What are the operating temperature ranges for the NCV7428?
The junction temperature range is -40°C to 170°C, and the storage temperature range is -55°C to 150°C.
- Is the NCV7428 RoHS compliant?
Yes, the NCV7428 is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What is the purpose of the EN pin on the NCV7428?
The EN pin is used to enable or disable the LIN block, controlling the operating mode of the LIN transceiver.
- How does the NCV7428 handle thermal shutdown?
The NCV7428 enters thermal shutdown when the junction temperature exceeds 160°C to 180°C, with a hysteresis of 10°C.
- What are the typical applications for the NCV7428?
The NCV7428 is typically used in automotive and industrial networks, particularly in Electronic Control Units (ECUs) and similar applications.
