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onsemi NCV78902 2-Phase Booster LED Driver

onsemi NCV78902 2-Phase Booster LED Driver is a single-chip, high-efficiency LED driver tailored for automotive front lighting applications, including high beams, low beams, daytime running lights (DRL), turn indicators, and fog lights. Designed to support high-current LEDs, the onsemi NCV78902 operates in conjunction with buck LED drivers like the NCV78935 (triple-channel buck) or NCV78925 (dual-channel buck) to deliver a complete multi-channel lighting solution. The NCV78902 supports multi-phase operation (up to four phases), allowing for optimized filtering and cost-effective component sizing.

The device features current sensing via shunt resistors or MOSFET RDS(on), programmable soft-start, and stand-alone or limp-home modes for enhanced system reliability. Operating at frequencies up to 2MHz, the LED driver enables compact inductor designs while maintaining low electromagnetic interference (EMI). Additionally, SPI programmability allows a single hardware configuration to adapt to various platforms, and it supports SEPIC mode, enabling output voltages lower than the input, ideal for fluctuating automotive battery conditions.

Features

  • Single-chip two-phase booster
  • Current sensing on shunt resistors or MOSFETs’ RDS(on)
  • Stand-alone/limp home mode
  • Built-in programmable soft-start
  • Superior stability and response time
  • Designed for small output capacitors
  • Low EMC emission
  • High operating frequencies to reduce inductor size, up to 2MHz
  • SEPIC mode supported
  • 4MHz SPI interface for dynamic control of system parameters
  • 48V battery system compliant
  • 3V to 5.5V VCC supply range
  • -40°C to +125°C ambient temperature range
  • TSSOP-16 WB case 948F package
  • ASIL B compliant, AEC-Q100 qualified, and PPAP capable
  • Lead-free, halide-free, and RoHS compliant

Applications

  • High beams and low beams
  • Turn indicators and DRLs
  • Position or park lights
  • Fog and static cornering
  • Adaptive driving beams
  • Pixel applications

Resources

Block Diagram

Block Diagram - onsemi NCV78902 2-Phase Booster LED Driver

ESD Schematic

Schematic - onsemi NCV78902 2-Phase Booster LED Driver

SPI Connection Scenarios and Power Supply Strategy

Schematic - onsemi NCV78902 2-Phase Booster LED Driver
Published: 2025-05-22 | Updated: 2025-06-02