Maker : Allegro MicroSystems
Part No. : A6266

  Datasheet PDF : A6266.pdf
  Cross Reference : A6266 Cross Reference
  Buy Component : A6266 Find Stock and Price

Shortcut : A6260  A6261  A6262  A6264  A6266 

Product Information

www.DataSheet.co.kr A6266 Automotive, Boost, High Current LED Controller Features and Benefits ▪ AEC Q100 Grade 0 Automotive Qualified ▪ Constant current LED drive ▪ 5 to 50 V supply ▪ Boost mode ▪ Drives up to 15 LEDs in series ▪ Programmable switching frequency 100 to 700 kHz ▪ Open LED overvoltage indication and protection ▪ Single and multiple LED short indication ▪ LED short to ground and supply protection ▪ PWM dimming control Description The A6266 is a boost converter controller, providing a programmable constant current output for driving high power LEDs in series. Driving the LEDs in series ensures identical currents and uniform brightness. For automotive applications, optimum performance is achieved when driving up to 15 LEDs at currents up to 1 A. The A6266 provides a cost-effective solution using an external logic-level MOSFET and minimum additional external components. The maximum LED current is set with a single external sense resistor and can be modified using a current reference input. Direct PWM control is possible via the Enable input, which also provides a shutdown mode. Integrated diagnostics and two fault outputs give indication of undervoltage, chip overtemperature, output open circuit, LED short circuit and LED undercurrent, and can be configured to provide short to supply and short to ground protection for the LED connections. A unique feature is the ability to detect one or more shorted LEDs. The device is provided in a 16-pin TSSOP package with exposed thermal pad (suffix LP). It is lead (Pb) free, with 100% matte tin leadframe plating. Applications: ▪ Automotive high power LED lighting systems ▪ Fog lights, reversing lights, daytime running lights ▪ Headlights Package: 16-pin TSSOP with exposed thermal pad (suffix LP) Not to scale Typical Application Diagram 12 V or 24 V (50 V max) Power net VIN Boost Mode VBAT(min) Maximum (V) Quantity of LEDs 6 10 7 12 8 13 9 15 Vf of each LED = 3.5 V, VBAT measured at VIN pin D = 85% VREG Fault Flags FF1 FF2 LN LP A6266 Enable EN IREF CKOUT OSC GND LF SG SP SN LA A6266-DS, Rev. 1 Datasheet pdf - http://www.DataSheet4U.net/ www.DataSheet.co.kr A6266 Automotive, Boost, High Current LED Controller Selection Guide Part Number A6266KLPTR-T Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings With respect to GND at TA = 25°C, unless otherwise specified Characteristic Load Supply Voltage Pins FF1, EN Pins FF2, CKOUT Pin OSC Pin SG Pins LA, LN Pin LF Pin LP Pin SP, SN Pin VREG Pin THTH Pin IREF Junction Temperature Storage Temperature Range Operating Temperature Range TJ(max) Tstg TA Range K With respect to LA With respect to LN Symbol VIN Notes Rating –0.3 to 50 –0.3 to 50 –0.3 to 6.5 –0.3 to 6.5 –0.3 to 6.5 –0.3 to 7 –6 to 6 –6 to 6 –0.3 to 5 –0.3 to 7 –0.3 to 7 –0.3 to 7 150 –55 to 150 –40 to 150 Unit V V V V V V V V V V V V °C °C °C Thermal Characteristics may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance (Junction to Ambient) Package Thermal Resistance (Junction to Exposed Pad) Symbol RθJA RθJP Test Conditions* On 4-layer PCB based on JEDEC standard On 2-layer PCB with 3.8 in.2 of copper area each side Value 34 43 2 Unit ºC/W ºC/W ºC/W *Additional thermal information available on the Allegro website Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 2 Datasheet pdf - http://www.DataSheet4U.net/ www.DataSheet.co.kr A6266 Automotive, Boost, High Current LED Controller Pin-out Diagram EN 1 FF1 2 FF2 3 CKOUT 4 IREF 5 OSC 6 SN 7 SP 8 PAD 16 LF 15 LA 14 LN 13 LP 12 VIN 11 VREG 10 GND 9 SG Terminal List Table Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 – Name EN FF1 FF2 CKOUT IREF OSC SN SP SG GND VREG VIN LP LN LA LF PAD Enable chip Fault flag Fault flag Function Oscillator out...

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