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ALT80800 Datasheet

Part Number ALT80800
Manufacturers Allegro
Logo Allegro
Description Constant-Current 2.0A PWM Dimmable Synchronous Buck LED Driver
Datasheet ALT80800 DatasheetALT80800 Datasheet (PDF)

ALT80800 Automotive-Grade, Constant-Current 2.0 A PWM Dimmable Synchronous Buck LED Driver FEATURES AND BENEFITS • AEC-Q100 qualified • Supply voltage 4.5 to 55 V • 2.0 A maximum output over operating temperature range • Integrated high-side and low-side MOSFETs: 200 mΩ  / 150 mΩTYP • True average output current control • Internal control loop compensation • Integrated 5 V, 14 mA LDO regulator for peripheral circuits • Dimming via PWM pin or EN pin down to 0.1% at 200 Hz • Analog dimming (ADIM .

  ALT80800   ALT80800






Part Number ALT80802
Manufacturers Allegro
Logo Allegro
Description Buck-Boost or Buck 2 Amp LED Driver
Datasheet ALT80800 DatasheetALT80802 Datasheet (PDF)

ALT80802 Wide Input Voltage, Adjustable Frequency, Buck-Boost or Buck 2 Amp LED Driver FEATURES AND BENEFITS • Automotive AEC-Q100 qualified • Supports buck-boost or buck mode operation • Supply voltage from 3.8 to 50 V in buck mode ▫ Handles automotive load dump and cold crank ▫ Also supports buck mode from a pre-boost supply • 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 an.

  ALT80800   ALT80800







Constant-Current 2.0A PWM Dimmable Synchronous Buck LED Driver

ALT80800 Automotive-Grade, Constant-Current 2.0 A PWM Dimmable Synchronous Buck LED Driver FEATURES AND BENEFITS • AEC-Q100 qualified • Supply voltage 4.5 to 55 V • 2.0 A maximum output over operating temperature range • Integrated high-side and low-side MOSFETs: 200 mΩ  / 150 mΩTYP • True average output current control • Internal control loop compensation • Integrated 5 V, 14 mA LDO regulator for peripheral circuits • Dimming via PWM pin or EN pin down to 0.1% at 200 Hz • Analog dimming (ADIM pin) for brightness calibration and thermal foldback • Low-power shutdown (1 µA typical) • Cycle-by-cycle current limit • Active low fault flag output • LED open fault mask setting for low VIN operation • Undervoltage lockout (UVLO) and thermal shutdown protection • Switching frequency dithering for improved EMC • Robust protection against: □ Adjacent pin-to-pin short □ Pin-to-ground short □ Component open/short faults PACKAGE: 16-Pin eTSSOP (suffix LP) Not to scale DESCRIPTION The ALT80800 is a synchronous buck switching regulator that provides constant-current output to drive high-power LEDs. It integrates both high-side and low-side N-channel DMOS switches for DC-to-DC step-down conversion. A true average current output is achieved using a cycle-by-cycle, controlled on-time method. Output current is user-selectable by an external current sense resistor. Output voltage is automatically adjusted to drive various numbers of LEDs in a single string. This ensures optimal system efficien.


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