View lt1166 datasheet:

LT1166 Power Output Stage Automatic Bias System FEATURES DESCRIPTION Set Class AB Bias Currents The LT®1166 is a bias generating system for controlling Eliminates Adjustments class AB output current in high powered amplifiers. When Eliminates Thermal Runaway of IQ connected with external transistors, the circuit becomes a Corrects for Device Mismatch unity-gain voltage follower. The LT1166 is ideally suited Simplifies Heat Sinking for driving power MOSFET devices because it eliminates Programmable Current Limit all quiescent current adjustments and critical transistor May Be Paralleled for Higher Current matching. Multiple output stages using the LT1166 can be Small SO-8 or PDIP Package paralleled to obtain higher output current. Thermal runaway of the quiescent point is elimin