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A6211 PWM Dimmable Buck Regulator LED Driver

Allegro MicroSystems

A6211: Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver

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 pulse width 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.

Product Number: A6211

Class: Integrated Circuits(ICs), Power Management(PMIC), LED Drivers

Tag: LED Drivers, PWM Dimmable Buck Regulator LED Driver, high-power LED Driver

Supply voltage 6 to 48 V
True average output current control
3.0 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

Part Number Type Output Current Topology Mounting Style Operating Frequency Dimming Applications Maximum Frequency Operating Temperature Voltage - Supply Package Type
A6211 DC DC Regulator 3A Step-Down (Buck) SMD/SMT 20 kHz PWM Lighting 2 kHz -40 °C ~ 105 °C(TA) 6V ~ 48V 8-pin SOICN with exposed thermal pad (suffix LJ)

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    Datasheet Download on Jun, 2021

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