Products Overview
A6217 Constant-Current PWM Dimmable Buck Regulator LED Driver
Allegro MicroSystems
A6217 and A6217-1:Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver
The A6217 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 3 mm × 3 mm wettable flank 10-pin DFN (suffix EJ) or an 8-pin narrow SOIC (suffix LJ), both with exposed pad for enhanced thermal dissipation. Both packages are 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A6217 | DC DC Regulato | 1.5A | Step-Down (Buck) | Surface Mount | - | PWM | Automotive | 2 kHz | -40 °C ~ 125 °C(TJ) | 6V ~ 48V | 10-pin DFN with wettable flank(suffix EJ) 8-pin SOICN (suffix LJ) |
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Datasheet Download on Jun, 2022
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