DatasheetsPDF.com

A6267

Allegro
Part Number A6267
Manufacturer Allegro
Description Automotive High Current LED Controller
Published Sep 12, 2013
Detailed Description A6267 Automotive High Current LED Controller Features and Benefits ▪ AEC-Q100 Grade 0 Automotive Qualified ▪ Constant c...
Datasheet PDF File A6267 PDF File

A6267
A6267


Overview
A6267 Automotive High Current LED Controller 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) Not to scale 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...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)