The A6211 is a switching buck regulator LED driver that provides constant-current output to drive high-power LEDs. With a wide input supply voltage from 6 V to 48 V, Allegro's A6211 device integrates a high-side N-channel MOSFET switch for DC-to-DC stepdown (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. This new device has significant fault protection advantages including design techniques to address pin-pin shorts, pin-ground shorts and open and shorted external components. The A6211 is designed for the consumer, industrial, and architectural lighting markets in addition to light bars for scanners and multi-function printers.
| Features |
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- Supply voltage from 6 V to 48 V
- True average output-current control
- 3.0 A (max.) output over operating temperature range
- Cycle-by-cycle current limit
- Integrated MOSFET switch
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- 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 (typ.)]
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| Applications |
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- General illumination
- Scanners and multi-function printers (light bars)
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- Architectural lighting
- Industrial lighting
- Display case lighting / MR16
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The A6211 is a switching buck regulator LED driver that provides constant-current output to drive high-power LEDs. With a wide input supply voltage from 6 V to 48 V, Allegro's A6211 device integrates a high-side N-channel MOSFET switch for DC-to-DC stepdown (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. This new device has significant fault protection advantages including design techniques to address pin-pin shorts, pin-ground shorts and open and shorted external components. The A6211 is designed for the consumer, industrial, and architectural lighting markets in addition to light bars for scanners and multi-function printers.
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