The LP8862-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with
integrated DC-DC converter. The DC-DC supports both boost and SEPIC modes of operation. The device
has two high-precision current sinks that can provide high dimming ratio brightness control with a
PWM input signal.
The boost/SEPIC converter has an adaptive output voltage control based on the LED current
sink headroom voltages. This feature minimizes power consumption by adjusting the voltage to the
lowest sufficient level in all conditions. DC-DC supports spread spectrum for switching frequency
and an external synchronization with a dedicated pin. A wide-range adjustable frequency allows the
LP8862-Q1 to avoid disturbance for AM radio band.
The input voltage range for the LP8862-Q1 is from 4.5 V to 40 V to support automotive
stop/start and load dump conditions. The device supports PWM brightness dimming ratio of 10 000:1
for 100-Hz input
PWM frequency. The LP8862-Q1 integrates extensive fault detection features. The device has an
option to drive an external p-FET to disconnect the input supply from the system in the event of a
fault. This feature also reduces inrush current and standby power consumption.
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