The A6266 is a boost convertercontrollerA programmable constant-current output is available to drive high-power LEDs connected in series. LEDs that drive in series ensure the same current and uniform brightness. For automotive applications, it can drive up to 15 LEDs at up to 1 A for optimized performance.
The A6266 provides a cost-effective solution using external logic horizontal MOSFETs and a minimal number of additional external components. The maximum LED current is programmable with a single external sense resistor and can be modified using a current reference input. Direct PWM control can be achieved by enabling the input, and there is also a slave mode.
Integrated diagnostics and dual fault outputs indicate undervoltage, die overtemperature, output open, LED short, and LED undercurrent, and LED short-to-ground protection can be configured to protect LED connections. Has a unique feature to detect one or more short-circuited LEDs.
The unit is available in a 16-pin TSSOP package (suffix LP) with an exposed heat sink. It is packaged as a lead (PB) free product and features 100% matte tin leadframe plating.
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- Automotive high-power LED lighting systems
- Fog lights, reversing lights, daytime running lights
- Car headlights
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- AEC Q100 Class 0 for cars
- Constant current LED driver
- 5 to 50 V supply voltage
- Boost mode
- Drive up to 15 LEDs in series
- The programmable switching frequency is 100 to 700 kHz
- LED overvoltage open-circuit indication and protection
- Single and multiple LED short-circuit indications
- LED short-to-ground and power supply protection
- PWM dimming control