A6267KLPTR-T Allegro Micro Systems, Inc., A6267KLPTR-T Datasheet

A6267KLPTR-T

Manufacturer Part Number

A6267KLPTR-T

Description

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A6267KLPTR-T.pdf (17 pages)

Specifications of A6267KLPTR-T

Pack_quantity

4000

Comm_code

85423990

Lead_time

175

Current page: 1 of 17
Download datasheet (350Kb)

D(max) = 85%

BAT

of each LED = 3.5 V,

Features and Benefits

▪ AEC Q100 Grade 0 Automotive Qualified

▪ Constant current LED drive

▪ 6.5 to 50 V supply

▪ Boost or buck-boost modes

▪ 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

▪ 10 μA shutdown current including LED leakage

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)

A6267-DS, Rev. 3

(V)

Buck Boost Mode

(min)

Quantity of

Maximum

LEDs

Power net

(Supply-referenced boost)

Fault

Flags

Enable

BAT

Buck-Boost Mode

12 V or 24 V

Not to scale

VREG

FF1

FF2

IREF

CKOUT

OSC

(50 V max)

A6267

GND

VIN

Typical Application Diagrams

Automotive High Current LED Controller

Description

The A6267 is a DC-to-DC 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 A6267 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.

This DC-DC converter can be configured as a ground-referenced

boost converter or as a supply-referenced boost converter

providing buck-boost capability. The buck-boost topology used

ensures that there is no leakage path through the LEDs when

in shutdown and no inrush current at power-up.

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.

D(max) = 85%

BAT

of each LED = 3.5 V,

(V)

(min)

Boost Mode

Quantity of

Maximum

LEDs

Power net

Fault

Flags

Enable

BAT

Boost Mode

12 V or 24 V (50 V max)

VREG

FF1

FF2

IREF

CKOUT

OSC

A6267

GND

VIN

A6267

Related parts for A6267KLPTR-T

Related keywords

A6267KLPTR-T datasheet
A6267KLPTR-T data sheet
A6267KLPTR-T pdf datasheet
A6267KLPTR-T component
A6267KLPTR-T part
A6267KLPTR-T distributor
A6267KLPTR-T RoHS
A6267KLPTR-T datasheet download