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.

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
ParameterTypical rangeNotes & selection driver
Slew Rate1-10 V/μs
Quiescent Current0.5-5 mA
Input Offset Voltage< 1 mV
Supply Voltage Range3V to 36V
Gain Bandwidth Product1-10 MHz
Common Mode Rejection Ratio> 80 dB

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 16750-2, IEC 60747, AEC-Q100

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Error Amplifier

Manufacturer profiles associated with Error Amplifier.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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