Allegro MicroSystems A6217 Auto PWM Dimmable Buck Regulator LED Drivers
Allegro MicroSystems A6217 Auto PWM Dimmable Buck Regulator LED Drivers offer a 6V to 48V supply voltage range, 3A maximum output, and are AEC-Q101 qualified. The A6217 is a single IC switching regulator that provides constant-current output to drive high-power LEDs. These drivers integrate a high-side N-channel DMOS switch for DC-to-DC step-down (buck) conversion. The dimmable design is accomplished when the output voltage is automatically adjusted to drive various numbers of LEDs in a single string, ensuring optimal system efficiency. LED dimming is achieved by a direct logic input pulse-width-modulation (PWM) signal at the enable pin. Allegro MicroSystems A6217 Auto PWM Dimmable Buck Regulator LED Drivers are available in a 3mm x 3mm wettable flank 10-pin DFN package or an 8-pin narrow SOIC package.
Features
- Cycle-by-cycle current limit
- Integrated MOSFET switch
- Enable / PWM dimming via direct logic input or power supply voltage
- Internal control loop compensation
- Undervoltage lockout (UVLO) and thermal shutdown protection
- Low power shutdown (1µA typical)
- Robust protection against
- Adjacent pin-to-pin short
- Pin-to-GND short
- Component open/short faults
Applications
- Automotive Lighting
- Daytime running lights
- Front and rear fog lights
- Turn/stop lights
- Map light
- Dimmable interior lights
Specifications
- AEC-Q100 qualified
- Maximum Output Current
- 3A over operating temperature range
- 1.5A for A6217-1
- 6V to 48V supply voltage range
- 3mm x 3mm Packages
- 10-pin DFN with wettable flank (suffix EJ)
- 8-pin SOIC (suffix LJ)
Packages
Additional Resources
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Published: 2023-05-16
| Updated: 2023-05-19