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STMicroelectronics LED7708 16-Channel LED Driver

STMicroelectronics LED7708 16-Channel LED Driver 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. 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. 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.

Features

  • Boost controller section
    • 3.6V to 36V input voltage range (LDO)
    • Adaptive output voltage for high efficiency
    • Internal +5V LDO for gate driver supply
    • Internal +3.3V LDO for device supply
    • High performance external MOSFET driver
    • 250kHz to 1MHz switching frequency
    • Programmable OV and OC protection
    • Fixed frequency peak current-mode control
    • External synchronization for multi-device application
    • Overtemperature alert and thermal shutdown
  • LED array driver section
    • 16 channels with 85mA/ch current capability
    • ±2% channel current accuracy
    • ±2% channel-to-channel current matching
    • LED short-circuit and open channel fault detection and management
    • 4-wire, 30MHz serial interface
    • 16x16-bit, 1x256-bit or 1x192-bit serial data formats
  • LED array driver section (Cont.)
    • Grouped or independent channel PWM control
    • Selectable 12/16-bit grayscale brightness control for local dimming
    • Programmable internal dimming oscillator
    • Programmable grayscale latency
    • Master/slave chain configuration supported

Applications

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

Demonstration Board

STMicroelectronics STEVAL-ILL035V1 Demonstrationsboard

Bietet ein Applikationsbeispiel eines kompakten Hintergrundbeleuchtungs-LED-Treibers unter Verwendung des LED7708-Bauteils.

Learn Moreüber STMicroelectronics STEVAL-ILL035V1 Demonstrationsboard View Productsverwandt mit STMicroelectronics STEVAL-ILL035V1 Demonstrationsboard
Veröffentlichungsdatum: 2012-07-16 | Aktualisiert: 2022-03-11