INDUSTRY COMPONENT

Error Amplifier

Error amplifier is an electronic component in voltage regulators that compares reference voltage with output voltage to generate error signals for regulation.

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Component Specifications

Definition
An error amplifier is a critical operational amplifier circuit within voltage regulation systems that continuously monitors the difference between a stable reference voltage and the actual output voltage. It amplifies this voltage differential to produce a control signal that drives the regulator's power stage, maintaining precise output voltage despite load variations and input fluctuations. This component ensures voltage stability through negative feedback control loops.
Working Principle
The error amplifier operates on differential amplification principles. It receives two inputs: a fixed reference voltage (typically from a bandgap or zener reference) and a scaled sample of the output voltage via a feedback network. The amplifier computes the difference between these voltages, amplifies it with high gain, and outputs a correction signal. This signal adjusts the duty cycle of switching regulators or the conduction of linear regulators to minimize voltage error, typically achieving millivolt-level accuracy through continuous feedback.
Materials
Semiconductor silicon substrate with integrated bipolar or CMOS transistors, metal interconnects (aluminum or copper), silicon dioxide insulation, and protective packaging (plastic DIP, SOIC, or ceramic). Operating temperature range: -40°C to +125°C for industrial grades.
Technical Parameters
  • Slew Rate 1-10 V/μs
  • Quiescent Current 0.5-5 mA
  • Input Offset Voltage < 1 mV
  • Supply Voltage Range 3V to 36V
  • Gain Bandwidth Product 1-10 MHz
  • Common Mode Rejection Ratio > 80 dB
Standards
ISO 16750-2, IEC 60747, AEC-Q100

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Error Amplifier.

error amplifier voltage regulator component operational amplifier feedback control voltage regulation electronic control power management Error Amplifier in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Voltage Regulator

An electronic component that maintains a constant output voltage level regardless of changes in input voltage or load conditions.

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Voltage Regulator IC

An integrated circuit designed to maintain a constant output voltage level regardless of variations in input voltage or load conditions.

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Power Supply Regulator

Electronic component that maintains stable voltage output to CPU/controller circuits

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Engineering Analysis

Risks & Mitigation
  • Thermal runaway in high-current applications
  • Oscillation due to improper compensation
  • Latch-up from voltage transients
  • Degradation from electrostatic discharge
FMEA Triads
Trigger: Excessive thermal stress
Failure: Parameter drift or catastrophic failure
Mitigation: Implement thermal management, derate operating parameters, use high-temperature grade components
Trigger: Improper feedback network design
Failure: System oscillation or instability
Mitigation: Include phase compensation networks, follow manufacturer layout guidelines, simulate stability margins
Trigger: Voltage transients beyond ratings
Failure: Electrical overstress damage
Mitigation: Add transient voltage suppressors, implement input filtering, use components with higher voltage ratings

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±1% for reference voltage, ±2% for overall regulation under specified conditions
Test Method
IEEE 181-2011 for amplifier testing, load regulation tested per IEC 62301, line regulation tested with ±10% input variation

Buyer Feedback

★★★★☆ 4.6 / 5.0 (10 reviews)

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"The technical documentation for this Error Amplifier is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the primary function of an error amplifier in voltage regulators?

The error amplifier compares the reference voltage with the output voltage and amplifies the difference to generate a control signal that adjusts the regulator's power stage, maintaining stable output voltage.

How does error amplifier accuracy affect voltage regulation?

Higher accuracy (lower input offset voltage and higher CMRR) in error amplifiers results in tighter voltage regulation, reduced output ripple, and better load regulation performance.

Can error amplifiers be used in both linear and switching regulators?

Yes, error amplifiers are fundamental to both linear and switching regulator topologies, though their implementation and surrounding circuitry differ based on regulator type.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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