IL9961DT

IL9961 is essentially a LED driver microcircuit, ensuring trimming by average current and functioning in the mode with the fixed duration of the off-state. Opposite to the microcircuits with the peak current control the given microcircuit does not have errors, caused by the difference «peak current – average current». This substantially enhances accuracy and efficiency of trimming the LED current during alteration of the supply voltage or load without necessity to apply the compensation circuits. Supply of driver IL9961 may be provided from the DC voltage mains of 8~450 V or the AC mains rectifier of 85~265 V. Average value of output current may be programmed by selecting the various value of the current metering resistor by the internal (stabilized with the accuracy of ±3 %) reference voltage, equal to (272±8) mV. It is possible to adjust the mean value of output current, presetting at the light power linear trimming input the voltage within the range of 0~1.5 V. The LED dimming adjustment is ensured by alteration of the off-duty signal at the input of the PWM-regulator.

Applications

• DC/DC or AC/DC LED drivers
• LED backlight for LCDs
• Universal DC source
• LED panels and screens
• Architecture and decorative LED lighting

Key features

• Input voltage range V₁ₙ from 8 to plus 450 V
• Control by average current
• Programmed fixed duration of the current off state in the induction coil
• Linear light Dimming
• Option of LED brightness Dimming by low frequency PWM signal
• Output short circuit protection
• IL9910 IC pin-to-pin compatibility
• Operating junction temperature - - 40~+ 125 °C