The ASL1507SHN is a highly integrated and flexible one-phase DC-to-DC boost converter IC. The IC has one integrated gate driver which can drive one external power metal-oxide-semiconductor field-effect transistor (MOSFET) and two integrated proportional-integral (PI) controllers which can regulate the output voltage. It has a serial peripheral interface (SPI) allowing control and diagnostic communication with an external microcontroller.
The ASL2507SHN is a highly integrated and flexible two-phase DC-to-DC boost converter IC. The IC has two integrated gate drivers which can drive two external power metal-oxide-semiconductor field-effect transistors (MOSFETs) and two integrated proportional-integral (PI) controllers which can regulate the output voltage on both channels. It has a serial peripheral interface (SPI) allowing control and diagnostic communication with an external microcontroller.
The ASL1507SHN; ASL2507SHN is designed primarily for use in automotive LED lighting applications and provides an optimized supply voltage for ASLx416/17SHN multichannel LED buck driver.
The ASL1507SHN; ASL2507SHN 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 in boost topology via SPI for output voltages of up to 80 V, to power the LED buck driver IC.
The ASL1507SHN is a single-phase boost converter with one output voltage. The ASL2507SHN is a two-phase boost converter, which can have two independent outputs. The ASL2507SHN is configurable via the SPI interface, as a single output converter with either one phase or two phases, or two independent output voltages. In case the SPI communication is lost in an abnormal situation, it switches to limp-home mode operation ensuring system safety.
The ASL1507SHN; ASL2507SHN boost converter can drive up to two external low-side N channel MOSFETs from an internally regulated adjustable supply. It can drive either logic or standard level MOSFETs.
The integrated SPI interface also allows for programming the supply under/overvoltage range, output voltage range, frequency spread spectrum, and DC-to-DC switching frequency. It enables the optimization of external components and flexibility for electromagnetic compatibility (EMC) design. This interface can be used also to provide diagnostic information such as the device temperature, battery voltage, VGG voltage, output voltage etc.
The ASL1507SHN; ASL2507SHN integrates a non-volatile memory (NVM) to save the default configuration internally. The configuration includes boost ramp-up, boost voltage, frequency setting, error detection and etc. The default configuration is used in limp‑home mode (SPI fail) and autonomous mode (no MCU). Additional features include input undervoltage lockout and thermal shutdown when the junction temperature of the ASL1507SHN; ASL2507SHN exceeds Ts d(otp).
The device is housed in a very small HVQFN32 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 ℃ to +125 ℃ ambient automotive temperature range.
NXP ASL2500SHNY