Overview
The NCV78825 is a high-efficiency, single-chip synchronous buck dual LED driver designed specifically for automotive front lighting applications. It is optimized for driving high-current LEDs and supports up to two LED strings with a maximum voltage of 60 V. This device integrates high-side switches and current sensing, minimizing the need for external components. The NCV78825 is AEC-Q100 qualified and PPAP capable, ensuring reliability and compliance with automotive standards.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Boost Supply Voltage | VBOOST | 6 | - | 67 | V |
| VINBCKx Supply Voltage | VINBCKx | VBOOST - 0.1 | - | VBOOST + 0.1 | V |
| VDRIVE Supply Voltage | VDRIVE | 4.5 | - | 10 | V |
| Buck Switch Peak Output Current | I_LBCKSW | - | - | 3.8 | A |
| Functional Operating Junction Temperature Range | TJF | -40 | - | 155 | °C |
| Parametric Operating Junction Temperature Range | TJP | -40 | - | 150 | °C |
Key Features
- Single-chip design with buck topology
- Supports two LED strings up to 60 V
- High current capability up to 3 A DC per output
- Integrated high-side switch and low-side pre-driver for external NMOS device
- High overall efficiency and low EMC emission
- Integrated high accuracy current sensing and switched mode buck current regulator
- Average current regulation through the LEDs
- High operating frequencies to reduce inductor sizes
- SPI interface for dynamic control of system parameters
- Fail-safe operating (FSO) mode, stand-alone mode, and master-slave synchronization mode of the buck channels
Applications
- High beam headlights
- Low beam headlights
- Daytime Running Lights (DRL)
- Position or park lights
- Turn indicators
- Fog lights
- Static cornering lights
Q & A
- What is the NCV78825 designed for?
The NCV78825 is designed for automotive front lighting applications, including high beam, low beam, DRL, turn indicators, fog lights, and static cornering lights.
- How many LED strings can the NCV78825 support?
The NCV78825 can support up to two LED strings with a maximum voltage of 60 V each.
- What is the maximum output current per LED string?
The maximum output current per LED string is up to 3 A DC.
- Does the NCV78825 require external sense resistors for buck current regulation?
No, the NCV78825 does not require external sense resistors for buck current regulation.
- What interface does the NCV78825 use for dynamic control?
The NCV78825 uses an SPI interface for dynamic control of system parameters.
- What are the operating temperature ranges for the NCV78825?
The functional operating junction temperature range is -40°C to 155°C, and the parametric operating junction temperature range is -40°C to 150°C.
- Is the NCV78825 AEC-Q100 qualified?
- Can multiple NCV78825 devices be combined for more LED channels?
- What is the package type of the NCV78825?
The NCV78825 is available in an SSOP36-EP package.
- What is the recommended operating voltage range for VDRIVE?
The recommended operating voltage range for VDRIVE is 4.5 V to 10 V.
