Description

The AS3693E is a 16 channels high precision LED controller with built-in PWM generators for driving external FETs in LCD-backlight panels.

The output current can be controlled either by an external PWM signal or by 16 built-in PWM generators with programmable delay, period and duty cycle.

Three free configurable dynamic power feedback circuits make the device usable for white LED as well as RGB backlights. Built-in safety features include thermal shutdown as well as open and short LED detection. All circuit parameters are programmable via I²C or SPI interface.

주요 특징

• 16 Channel LED driver
• Output current only limited by external transistor
• Output voltage 0.4V to 50V
• Absolute current accuracy ±0.5%
• Output slew rate programmable
• Current programmable with external resistor
• Linear current control with 8-bit DAC
• Linear current control with external analog voltage
• Digital current control with external PWM signal
• Digital current control with 16 independent PWM generators
• Free programmable 12-bit resolution ( period, high time and delay )
• Overvoltage detection (short LED)
• Undervoltage detection (open LED)
• Temperature shutdown
• Fault interrupt output
• I²C interface
• SPI interface
• 5-bit device - address (sets device address and interface mode)
• Automatic supply regulation feedback
• Each output can be assigned to red, green or blue feedback
• Package epTQFP64

적용분야

•  LED backlighting for LCD – TV sets and monitors

Block diagram for AS3693E Backlighting IC