ALT80802 Description
The ALT80802 is a high-frequency switching regulator that provides constant output current to drive high-power LEDs. It integrates a power MOSFET for step-down or inverting buckboost conversion. With current-mode control and simple external pensation, theALT80802 can achieve fast transient response.
ALT80802 Key Features
- Automotive AEC-Q100 qualified
- Supports buck-boost or buck mode operation
- Supply voltage from 3.8 to 50 V in buck mode
- Supports up to 16 V output in buck-boost mode for 4 WLEDs
- 150 mΩ integrated MOSFET switch
- Programmable switching frequency up to 2.5 MHz for small solution size and operation above AM band
- Designed for low EMC with frequency dithering
- Integrated level shifting allows ground-referenced enable and fault flag in buck-boost mode
- PWM dimming via direct logic input or power supply voltage
- Robust protection against: ▫ Adjacent pin-to-pin short ▫ Pin-to-VSS (IC ground) short ▫ ponent open/short faults