A6213 Datasheet, PDF (1/17 Pages) Allegro MicroSystems – The A6213 is a single IC switching regulator that provides constant-current output to drive high-power LEDs.

A6213
Automotive Grade, Constant-Current 3-Ampere
PWM Dimmable Buck Regulator LED Driver
Features and Benefits
• AEC-Q100 qualified
• Supply voltage 6 to 48 V
• True average output current control
• 3.0 A maximum output over operating temperature range
• 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
Package 8-pin SOICN with exposed
thermal pad (suffix LJ):
Not to scale
Description
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.
Applications:
Automotive lighting
• Daytime running lights
• Front and rear fog lights
• Turn/stop lights
• Map light
• Dimmable interior lights
Typical Application Circuit
V_IN (6 to 48 V)
GND ^C1
R1
EN
Enable/PWM Dimming
(100 Hz to 2 kHz)
1 _VIN
2 _TON
3
EN
4 _CS
A6213 ^{SW 8}
BOOT ⁷
C4
GND ⁶
VCC ⁵
C5
L1
D1
LED+
LED–
RSENSE
Two different methods of achieving PWM dimming of LED current are shown
A6213-DS