The ASL1500SHN is a highly integrated and flexible single phase DC-to-DC boost converter IC. It has an SPI interface allowing control and diagnostic communication with an external microcontroller.
It is designed primarily for use in automotive LED lighting applications and provides an optimized supply voltage for ASLx415SHN Multi-channel LED Buck Driver.
The ASL1500SHN has a fixed frequency peak current mode control with parabolic/non-linear slope compensation. It can operate with input voltages from 5.5 V to 40 V. It can be configured via SPI for output voltages of up to 80 V, to power the LED buck driver IC.
The ASL1500SHN boost converter drives one external low-side N channel MOSFET from an internally regulated adjustable supply to drive either logic or standard level MOSFET.
The integrated SPI interface also allows for programming the supply under/over voltage range, output voltage range and DC-to-DC switching frequency. It enables the optimization of external components and flexibility for EMC design. This interface can also be used to provide diagnostic information such as the driver temperature.
Additional features include input under-voltage lockout and thermal shutdown when the junction temperature of the ASL1500SHN exceeds +175 °C.
The device is housed in a very small HVQFN32 pin package with an exposed thermal pad. It is designed to meet the stringent requirements of automotive applications. It is fully AEC Q100 grade 1 qualified. It operates over the -40 °C to +125 °C ambient automotive temperature range.