Retina MacBook 2015 Teardown

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Stap 27

Apple has opted to transition from using a row of LEDs with a light guide panel, to installing individual LEDs beneath each key.
And behind those keys, we find:
An array of four Texas Instruments TLC5951 PWM LED Drivers
A pair of NXP PCAL6416A I/O Expanders
They claim that this new keyboard design provides even lighting across the whole keyboard, while maintaining a higher level of power efficiency than previous designs.
PCB maker Compeq reports increased revenues for March.

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