The LED7708 has been specifically designed to supply several LEDs starting from a single low-voltage rail. It integrates a boost controller, sixteen current generators and a 4-wire serial interface. The boost controller regulates the output voltage in an adaptive way, according to the LED requirements, resulting in an improved overall efficiency. All the current generators are 40 V-rated, allowing the LED7708 to drive several LEDs in series on each channel. The channels can be put in parallel for higher output current.
The brightness of the LEDs is controlled by using the serial interface. A selectable 12-bit or 16-bit grayscale brightness control allows independent PWM on each channel. A programmable on-chip dimming oscillator is provided for external circuitry simplification. The device has dedicated pins to lock to an external synchronization with other devices (master or slave) for noise reduction in multi-device applications. The LED7708 implements basic protection (OVP, OCP and thermal shutdown) as well as LED array protection. It can detect and manage open-LED and shorted-LED faults and different fault-management options are available in order to cover most application needs.
|DS8850: 16 channels x 85 mA LED driver with boost controller and 4-wire serial interface||1.0||855 KB|
|Brochure Power management guide||09.2017||3 MB|
|LED drivers for backlighting and lighting applications||2.1||1 MB|
|STEVAL-ILL035V1||Multi-channel LED driver with integrated boost controller for medium, large LCD panel backlight based on LED7708 and STM32F103C6T6A|
|STEVAL-ILL035V2||ST||Multi-channel LED driver with integrated boost controller for medium/large LCD panel backlight based on LED7708 and STM32F103C6T6 - daughter board|
|Part Number||Marketing Status||Quantity||Unit Price (US$) *||Package||Packing Type||Operating Temperature (°C) (min)||Operating Temperature (°C) (max)||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|LED7708TR||Active : Product is in volume production||1000||1.591||VFQFPN 48 7x7x1.0||Tape And Reel||-40||150||NEC||EAR99||PHILIPPINES||MORE INFO||DISTRIBUTOR AVAILABILITY|
|LED7708||Active : Product is in volume production||1000||1.591||VFQFPN 48 7x7x1.0||Tray||-40||150||NEC||EAR99||-||MORE INFO||No availability reported, please contact our Sales office|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|LED7708TR||Active||VFQFPN 48 7x7x1.0||Industrial||Ecopack2|
|LED7708||Active||VFQFPN 48 7x7x1.0||Industrial||Ecopack2|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.