The AL8853AQ is an automotive AEC-Q100 highly integrated and costeffective boost controller and single-ended primary-inductance controller (SEPIC). It provides a high-performance LED lighting solution with low BOM (bill of material) cost. The AL8853AQ contains a PWM (pulse-width modulation) boost/SEPIC control which uses current-mode and fixed-frequency operation to regulate the LED current. The LED current is sensed through an external current-sense resistor.

The voltage across the sensing resistor is compared with reference level of 200mV. The error is amplified to control the pulse width of the power switch thus to regulate the current flowing into the LED. The AL8853AQ offers PWM converted to analog DC dimming mode for a wide range of dimming control.

The AL8853AQ has comprehensive protection features such as power MOSFET overcurrent protection (OCP), output overvoltage protection (OVP), diode & inductor short protection, LED cathode short to GND protection, IC power-supply undervoltage lockout (UVLO), LED open protection, VOUT short protection and overtemperature protection (OTP).