Description

The AS3810 is a 16 channels precision LED driver for use in LCD backlight panels. Dynamic power feedback controls the external power supply to guarantee best efficiency. Built-in safety features include thermal shutdown as well as open and short LED detection. The device is programmable via serial interface.

Key Features

• 16 Channel LED driver
• Output voltage max. 30V

• Output current 177.5mA
• Linear current setting using two range 8-bit IDAC
• No external resistor needed
• Current accuracy ±1%
• Channel to Channel current accuracy ±0.9%
• Output slew rate programmable
• Digital current control with 16 independent PWM generators
• Free programmable 12-bit resolution (period, high time and delay)
• PWM-generator clock
  - Internal RC-oscillator
  - External Clock
• H-Sync, V-Sync inputs to synchronize with TV-set
• Direct PWM mode
• Undervoltage detection (open LED)
• Undervoltage auto-turnoff
• Overvoltage detection (short LED)
• Overvoltage auto-turnoff
• Temperature shutdown
• Register lock / unlock function
• Fault interrupt output
• 2 configurable supply regulation feedback outputs
• Enhanced digital feedback operation
• LDO (3.2V / 20mA) for external MCU supply
• SPI interface
• 8kV ESD at current outputs
• 2kV ESD an all other pins
• Package:
  32-pin QFN 5x5mm, 0.5mm pitch

Applications

The AS3810 is suitable for LED backlighting for LCD such as TV sets and monitors.

Block diagram for 16-channel LED controller AS3810