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A6211

Allegro
Part Number A6211
Manufacturer Allegro
Description Buck Regulator LED Driver
Published Dec 3, 2016
Detailed Description A6211 Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver FEATURES AND BENEFITS • Supply voltage 6 to 48 V...
Datasheet PDF File A6211 PDF File

A6211
A6211

Overview
A6211 Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver FEATURES AND BENEFITS • Supply voltage 6 to 48 V • True average output current control • 3 A maximum output over operating temperature range • Cycle-by-cycle current limit • Integrated MOSFET switch • Dimming via direct logic input or power supply voltage • Internal control loop compensation • Undervoltage lockout (UVLO) and thermal shutdown protection • Low power shutdown (1 µA typical) • Robust protection against: □ Adjacent pin-to-pin short □ Pin-to-GND short □ Component open/short faults PACKAGE: 8-pin SOICN with exposed thermal pad (suffix LJ): Not to scale DESCRIPTION The A6211 is a single IC switching regulator that provides constant-current output to drive high-power LEDs.
It integrates a high-side N-channel DMOS switch for DC-to-DC step- down (buck) conversion.
A true average current is output 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 the optimal system efficiency.
LED dimming is accomplished by a direct logic input pulsewidth modulation (PWM) signal at the enable pin.
The device is provided in a compact 8-pin narrow SOIC package (suffix LJ) with exposed pad for enhanced thermal dissipation.
It is lead (Pb) free, with 100% matte-tin leadframe plating.
APPLICATIONS: • General illumination • Scanners and multifunction printers (light bars) • Architectural lighting • Industrial lighting • Display case lighting / MR16 VIN (6 to 48 V) GND C1 R1 EN Enable/PWM Dimming (100 Hz to 2 kHz) 1 VIN A6211 SW 8 2 TON BOOT 7 C4 3 EN 4 CS PAD GND 6 VCC 5 C5 A6211-DS, Rev.
8 MCO-0000886 Typical Application Circuit L1 D1 LED+ .
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LED– RSENSE June 11, 2021 A6211 Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver SELECTION GUIDE Part Number A6211GLJTR-T Operating Ambient Temperature, TA –4...


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