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Automotive-Grade,Constant-CurrentPWMDimmableBuck
A6213 and A6213-1
Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver
Features and Benefits
? AEC-Q100 qualified ? Supply voltage 6 to 48 V ? True average output current control ? 3 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
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 pulsewidth 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
VIN (6 to 48 V)
GND C1 EN
R1
Enable/PWM Dimming (100 Hz to 2 kHz)
1 VIN
2 TON 3 EN 4 CS
A6213 SW BOOT
8 7
PAD GND 6 VCC 5
C4
C5
A62131-DS, Rev. 6
January 21, 2013
L1 D1
LED+
...
LED– RSENSE
A6213 and A6213-1
Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver
Selection Guide
Part Number
A6213KLJTR-T A621
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