Description
The LED7708 has been specifically designed to supply several LEDs starting from a single lowvoltage 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

Features
■ Boost controller section – 3.6 V to 36 V input voltage range (LDO) – Adaptive output voltage for high efficiency – Internal +5 V LDO for gate driver supply – Internal +3.3 V LDO for device supply – High performance external MOSFET driver – 250 kHz to 1 MHz switching frequency – Programmable OV and OC protection – Fixed frequency peak current-mode control – External synchronization for multi-device

Applications
■ TV and monitor backlight units for LCD panels
■ Medium and large size LCD panel backlights
■ RGB/RGGB backlight solutions