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LT1166: Power Output Stage Automatic Bias System Data Sheet6/21/2017PDF531K
Overview
Features and Benefits
- Set Class AB Bias Currents
- Eliminates Adjustments
- Eliminates Thermal Runaway of IQ
- Corrects for Device Mismatch
- Simplifies Heat Sinking
- Programmable Current Limit
- May Be Paralleled for Higher Current
- Small SO-8 or PDIP Package paralleled to obtain higher output current.
Product Details
The LT1166 is a bias generating system for controlling class AB output current in high powered amplifiers. When connected with external transistors, the circuit becomes a unity-gain voltage follower. The LT1166 is ideally suited for driving power MOSFET devices because it eliminates all quiescent current adjustments and critical transistor matching. Multiple output stages using the LT1166 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. The LT1166 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.
Applications
- Biasing Power MOSFETs
- High Voltage Amplifiers
- Shaker Table Amplifiers
- Audio Power Amplifiers
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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R412 Reliability Data3/26/2018PDF20 K
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LT1166 - Power Output Stage Automatic Bias System Specification Notice11/10/2004PDF103K
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DN126 - The LT1166: Power Output Stage Automatic Bias System Control IC8/21/2007PDF152K
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Versatile Ring Tone Generator Finds Uses in Motor Drivers and Amplifiers9/1/1999 LT Journal
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The LT1684 Solves the Global Ringing Problem6/1/1999
Tools & Simulations
LTspice
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Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
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LT1166CN8#PBF | Material Declaration | Reliability Data | 8-Lead PDIP (Narrow 0.3 Inch) | |
LT1166CS8#PBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
LT1166CS8#TRPBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
Wafer Fabrication Data | R412 Reliability Data |
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