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Automotive Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver

A6213, A6213-1

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A6213 ECAD Model Type Image
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Description

Top Features

Typical Applications

Packaging

The A6213 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.

  • AEC-Q100 qualified
  • Supply voltage 6 to 48 V
  • True average output current control
  • 3.0 A maximum output over operating temperature range
    (1.5 A for A6213-1)
  • 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

Automotive lighting

  • Daytime running lights
  • Front and rear fog lights
  • Turn/stop lights
  • Map light
  • Dimmable interior lights
8-pin SOICN with exposed thermal pad (suffix LJ)
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Part Number Specifications and Availability

Documentation and Resources

Documentation

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Documents Found: 32
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Application Note
Design Considerations in Selection of Converter Configuration for Automotive LED Headlight Applications