A8510: Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver

The A8510 is a multi-output white LED driver for LCD backlighting. It integrates a current-mode boost converter with internal power switch and 8 current sinks. The boost converter can drive up to 96 LEDs with 12 LEDs at 40 mA per string. The LED sinks can also be paralleled together to achieve even higher LED currents, up to 320 mA. The A8510 can operate from a single power supply, from 5 to 40 V.

If required, the A8510 can drive an external P-FET to disconnect the input supply from the system in the event of a fault. The A8510 provides protection against output short and overvoltage, open or shorted diode, open or shorted LED pin, and overtemperature. A dual level cycle-by-cycle current limit function provides soft start and protects the internal current switch against high current overloads.

The A8510 has a synchronization pin that allows PWM switching frequencies to be synchronized in the range of 600 kHz to 2.25 MHz.

The device package is a 26-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

DATASHEETS

A8510 Datasheet

SAMPLE & BUY

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
700 Veterans Memorial Hwy
Suite 310
Hauppauge, NY 11788
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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Integrated 2 MHz capable boost converter with 60 V DMOS switch with OVP protection
Sync function to synchronize boost converter switching frequencies up to 2.25 MHz
LED current up to 40 mA per LED channel into 8 channels
Drives up to 12 series LEDs in 8 parallel strings (Vf = 3.5 V, If = 40 mA), VIN = 8 V, switching frequency of 1 MHz
Single EN/PWM pin interface for PWM dimming and enable functions
APWM pin for fine-tuning color adjustment and/or maximizing contrast ratio
Integrated driver for optional external PMOS input disconnect switch
Typical LED accuracy of 0.7% and 0.8% for LED-to-LED matching
Internal bias supply for single-supply operation from 5 to 40 V
Extensive protection features

The device package is a 26-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation (suffix EC). It is lead (Pb) free, with 100% matte tin leadframe plating.

EC QFN/MLP with exposed pad 26 lead

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Part Number Specifications and Availability
Part Number	Package Type	Temperature	RoHS Compliant	Part Composition / RoHS Data	Comments	Samples	Check Distributor Stock
A8510GECTR-T	26-lead QFN/MLP	-40°C to 105°C	Yes	View Data		Contact your local sales rep	Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

A8510: Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver

Part Number Specifications and Availability

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.