LED backlight driver IC for medium and large displays
The device integrates a boost controller to drive an external MOSFET and six internal current sink channels capable of up to 80 mA each, and channels can be combined together to achieve even higher currents. The boost converter operates in constant-frequency (programmable) current-mode control. The LED sink current is set by an external resistor (R_ISET), and PWM dimming allows LED currents to be controlled. The A8516 incorporates protection against overvoltage, open or short-circuited LED string, and over-temperature conditions. A dual level cycle-by-cycle current limit function provides soft start and protects against overloads. The A8516 is offered in a 24-pin TSSOP package (LP) or a 24-pin SOICW package (LB), with internally fused pins for enhanced thermal dissipation, both with an exposed thermal pad for enhanced thermal dissipation. Both packages are lead (Pb) free, with 100% matt tin leadframe plating.
Get the data sheet at https://www.allegromicro.com/en/Products/Part_Numbers/8516/8516.pdf
Visit Allegro MicroSystems at www.allegromicro.com
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