A6266KLPTR-T Allegro Micro Systems, Inc., A6266KLPTR-T Datasheet

A6266KLPTR-T

Manufacturer Part Number

A6266KLPTR-T

Description

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A6266KLPTR-T.pdf (17 pages)

Specifications of A6266KLPTR-T

Pack_quantity

4000

Comm_code

85423990

Lead_time

175

Current page: 1 of 17
Download datasheet (333Kb)

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

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)

A6266-DS, Rev. 1

D = 85%

BAT

Not to scale

BAT

of each LED = 3.5 V,

(V)

measured at VIN pin

(min)

Boost Mode

Automotive, Boost, High Current LED Controller

Quantity of

Maximum

LEDs

12 V or 24 V (50 V max)

Power net

Typical Application Diagram

Fault

Flags

Enable

VREG

FF1

FF2

IREF

CKOUT

OSC

A6266

GND

VIN

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.

A6266

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