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A80804-1

Allegro
Part Number A80804-1
Manufacturer Allegro
Description High-Current Four-Channel Automotive LED Controller
Published Dec 6, 2023
Detailed Description A80804 and A80804-1 High-Current Four-Channel Automotive LED Controller FEATURES AND BENEFITS • AEC-Q100 qualified • VI...
Datasheet PDF File A80804-1 PDF File

A80804-1
A80804-1


Overview
A80804 and A80804-1 High-Current Four-Channel Automotive LED Controller FEATURES AND BENEFITS • AEC-Q100 qualified • VIN range: 5.
3 to 40 V supply, operates down to 5.
1 V when enabled • Four independent MOSFET drivers • Internal and external PWM dimming options □ Internal PWM dimming set by resistor divider or analog voltage □ External PWM dimming set by microcontroller • Flexible LED analog dimming options □ Two ADIM pins for LED binning, NTC feedback, or hybrid analog/PWM dimming □ Adjustable integrated LED current derating for elevated VIN □ Integrated LED current derating for elevated IC junction temperature • Combine A80804 devices in parallel for higher number of LED strings; PWMOUT signal available when used with internal PWM for master/slave operation • MINOUT signal available to trim a pre-regulator to minimize power loss • Selectable LED current slew rate limit during PWM dimming • Extensive fault detection and protection □ Drain short-to-ground detection □ Drain short-to-VIN □ Open LED □ Thermal protection □ Programmable input UVLO DESCRIPTION The A80804 and A80804-1 are linear, programmable current controllers capable of accurately regulating current in four LED strings using external MOSFETs.
Each of the four LED drivers has an independent enable/PWM input and current-sense resistors and can be independently dimmed with an external PWM signal, or all channels can be dimmed with internal PWM dimming and automatic phase shifting.
The overall LED current can be switched between low and full intensity for applications including stop/tail or DRL/position lighting.
Multiple analog dimming options are available to support applications including LED binning, NTC foldback, or hybrid dimming.
A selectable LED current slew-rate control is available to tune PWM edge times and improve EMI performance.
The MINOUT feature allows for trimming an external DC-DC converter to optimize the voltage across the linear current regulating MOSFETs to minimize power loss.
The A...


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