onsemi NCV789x5 Synchronous Triple Buck LED Drivers
onsemi NCV789x5 Synchronous Triple Buck LED Drivers are designed for high current LEDs and provide a complete solution to drive three LED strings. These LED drivers are integrated with hi-accuracy current sensing and an independent supply voltage for each buck channel. Each channel can deliver up to 1.6A of output current. The NCV789x5 LED drivers support SPI programmability, allowing dynamic control of system parameters. These LED drivers use synchronous switching technology with average current regulation to ensure stable and efficient LED operation. The NCV789x5 LED drivers feature a minimum of external components and low EMC emission.
The NCV78935 can be combined with the NCV78925 devices, also together with the NCV78964 or NCV78902 devices, to operate in multiphase mode. These LED drivers meet ASIL‑B compliance, are AEC‑Q100 qualified, and are capable of PPAP. Typical applications include high beam, low beam, Daytime Running Light (DRL), turn indicator, fog light, static cornering, and adaptive driving beam.
Features
- Single-chip synchronous triple buck solution
- Stand-alone/limp home mode
- 3 independent LED strings up to 60V
- High current capability 1.6A per output
- Switched-mode synchronous bucks with average current regulation through the LEDs, programmable buck frequency
- Independent supply voltage for each buck channel
- Integrated hi-accuracy current sensing
- Minimum of external components
- Low EMC emission
- High operating frequencies to reduce inductor size up to 2MHz
- 4MHz SPI interface for dynamic control of system parameters
- 48V battery system compliant
- ASIL B compliant, AEC-Q100 qualified, and PPAP capable
- Pb and halide/BFR-free
- RoHS compliant
Applications
- High beam and low beam
- Turn indicator
- Daytime Running Light (DRL)
- Position or park light
- Fog and static cornering
- Adaptive driving beam
- Pixel
Block Diagram
Typical Application Schematic
