LED Drivers for Backlighting

backlighting, led backlighting, linear led lightingLCD panels have become extremely pervasive, from mobile phones to navigation, portable DVD players, notebooks, monitors, televisions, and even automotive instrument clusters and driver information systems. These panels need a backlighting source, which in the past was CCFL-based but is now dominated by LED light sources.

Allegro offers a variety of LED drivers for backlighting to match varying application requirements for input voltage range, number of LEDs per string, number of strings, and LED current.

These devices are highly integrated, with comprehensive fault protection and excellent performance. As well as devices targeted for consumer applications, AEC-Q100 qualified devices are available with appropriate automotive voltage and temperature ratings.

LED Backlighting Solutions Using Linear LED Driver ICs

LED Drivers - Automotive Backlighting

Part
Number

Topology VIN (V)

Max OVP (V)

IOUT Per
Channel (mA)

Number of Channels IOUT Total 
(mA)
LEDs/
Channel
Total LEDs Freq. Packages
A8501 Boost 6.8 to 40 38 100 4 400 9 36 0.6 to 2.2 MHz eTSSOP-28
A8502 Boost 5 to 40 55 120 2 240 12 24 0.6 to 2.2 MHz eTSSOP-16
A8510 Boost

5 to 40

55 40 8 320 12 96 0.6 to 2.2 MHz 5 × 5 QFN-26
A8511 Boost 6.8 to 40   38 150 4 600 9 36 0.6 to 2.2 MHz eTSSOP-28
A8513 Boost 4.5 to 40 55 150 1 150 14 14 0.25 to 2.2 MHz eMSOP-10
A8514 Boost 5 to 40 55 80 4 320 12 48 0.6 to 2.2 MHz eTSSOP-20
A8517 Boost 4.5 to 40 40 60 10 600 10 100 0.4 to 2.3 MHz eTSSOP-28
A8522 Boost  4.5 to 40  40  60 8 480 11 88 0.4 to 2.3 MHz  eTSSOP-28 
A8518 Boost 4.5 to 40 40 200 2 400 11 22 2.15 MHz eTSSOP-16
A8519 Boost 4.5 to 40 40 100 4 400 11 44 0.2 to 2.3 MHz eTSSOP-20

QFN-28
LED Drivers - General Backlighting

Part
Number

Topology VIN (V)
Max OVP (V) IOUT Per
Channel (mA)
Number of Channels IOUT Total 
(mA)
LEDs/
Channel
Total LEDs Freq. Packages
A8500 Boost 5 to 27  47 25 8 200 12 96 0.2 to 2 MHz 4 × 4 mm TQFN-26
A8503 Boost 5 to 27 47 35 6 210 12 72 0.6 to 2.2 MHz 4 × 4 mm

TQFN-26
A8508 Boost Controller 9 to 40  Scalable 120 8 960 15 120 0.3 to 0.8 MHz eTSSOP-24
A8509 Boost Controller 9 to 40  Scalable 240 4 960 15 60 0.3 to 0.8 MHz eTSSOP-24, SOIC-24
A8510 Boost

5 to 40

55 40 8 320 12 96 0.6 to 2.2 MHz 5 × 5 QFN-26
A8512 Boost Controller 8 to 24  Scalable 120 6 720 32 192 0.3 to 1 MHz SOIC-24
A8515 Boost 5 to 40 55 120 2 240 12 24 0.6 to 2.2 MHz eTSSOP-16
A8516 Boost Controller 8 to 24 Scalable 120 6 720 32 192 0.3 to 1 MHz eTSSOP-24, SOIC-24

 

The following LED drivers have been discontinued:

A8504, A8507A8521

.

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