BD18397RUV-ME2

BD18397RUV-ME2 is a 2 channel current buck LED driver with SPI for automotive. It uses on-time topology supporting near fixed switching frequency and fast switching duty regulation and with using average LED current feed buck topology for more accreted LED current regulation system over wide input, LED output range. This can support individual 10bit analogue dimming and 10-bit PWM dimming for LED current by programming the 10-bit register via SPI. This will support LIMP-HOME mode, if SPI communication has an error. In the LIMP-HOME mode, individual LED current can be set by the external pins and can keep LED current sourcing during applying input power without SPI communication. Application includes automotive exterior lamps, rear, turn, DRL/position, fog, high/low beam etc.

• AEC-Q100 qualified (grade 1)
• ISO 26262 process compliant to support ASIL-B
• On-time topology for near fixed frequency switching
• Average LED current regulation, protection diodes less for current sense pins
• Cycle-by-cycle switch over current protection, thermal shutdown (TSD)
• Thermal sensor reading, serial peripheral interface (SPI), LIMP-HOME mode
• 5 to 45V (VIN) continuous input voltage range, 2.5 to 60V LED output voltage range
• 2.0A maximum output LED current/channel, ±3% LED average current accuracy
• 5 to 100% 10bit analogue dimming range, 200KHz to 2.25MHz programmable switching frequency range
• HTSSOP-C48R package, junction temperature range from -40°C to +150°C