LT1166CN8#PBF

LT1166 is a bias generating system for controlling class AB output current in high powered amplifier. When connected with external transistors, the circuit becomes a unity-gain voltage follower. It is ideally suited for driving power MOSFET devices because it eliminates all quiescent current adjustments and critical transistor matching. Multiple output stages using the device can be paralleled to obtain higher output current. Thermal runaway of the quiescent point is eliminated because the bias system senses the current in each power transistor by using a small external sense resistor. A high speed regulator loop controls the amount of drive applied to each power device. It can be biased from a pair of resistors or current sources and because it operates on the drive voltage to the output transistors, it operates on any supply voltage. It is used in application such as biasing power MOSFETs, high voltage amplifiers, shaker table amplifiers, audio power amplifiers etc.

• Eliminates adjustments
• Eliminates thermal runaway of IQ
• Corrects for device mismatch
• Simplifies heat sinking
• Programmable current limit
• May be paralleled for higher current
• Input bias current is 2µA typical at (operating current 15mA to 50mA)
• Output offset voltage is 50mV typical at (operating current 15mA to 50mA)
• Operating specified temperature is 0°C to 70°C
• Package style is 8-lead PDIP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party