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The AL5873Q is an automotive-compliant three-channel linear LED driver with PWM dimming and analog dimming control. Each channel can drive up to 250mA with a combined driving current up to 750mA. All three LED channels’ current of the AL5873Q are set by two reference resistors connected to the REF1 and REF2 pin. The AL5873Q regulates LED current for each channel, accurate down to ±4%, with excellent dimming performance. The AL5873Q enters standby mode to save power if no PWM signal is detected.
The AL5873Q monitors the temperature and reduces the LED current if its juncture temperature exceeds the threshold temperature. For improved system robustness the AL5783Q has input under voltage lock-out (UVLO), LED string-open /-short protection, and overtemperature protection (OTP) which are reported by a fault indicator (FAULTB) pin. The AL5873Q is available in TSSOP-16EP (Type DX) package.
Automotive LED Inner Lamps
Rear Light – Tail and Stop Light, Rear Turn Indicator, Parking Light, Fog Light, Reverse Light
AEC-Q100 Grade 1 Qualification
Wide Input Voltage Range from 5V to 55V
Each Channel Up to 250mA Current Capability
Set Stop and Tail Current Independently Through 2 Resistors
Switch LED Current Between Stop and Tail Function Automatically via FULL Input
PWM Dimming via Both PWM Input and Power Supply
Analog Dimming via ADIM Input
Automatically Enter and Exit Standby Mode without Enable Pin
Input Under Voltage Lock-Out (UVLO)
LED String Open Protection
LED String Short Protection
Over Temperature Protection (OTP)
Thermal Fold-back if Chip Temperature Exceeds the Threshold
Fault Reporting: UVLO, OTP, LED Open, and LED Short