Products Overview
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.
| 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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