INDUSTRY COMPONENT

Feedback Resistor Network

A precision resistor network used in power supply feedback loops to regulate output voltage.

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Component Specifications

Definition
A feedback resistor network is a critical electronic component in power supply regulation circuits, typically consisting of multiple precision resistors arranged in a specific configuration (often voltage divider topology) to sample the output voltage and provide a proportional feedback signal to the control IC. This network establishes the closed-loop control that maintains stable output voltage despite load variations, input fluctuations, and temperature changes.
Working Principle
The feedback resistor network operates by creating a voltage divider that samples a fraction of the power supply's output voltage. This sampled voltage (Vfb) is compared against a precise internal reference voltage (Vref) within the regulation IC. Any deviation between Vfb and Vref generates an error signal that adjusts the power stage's duty cycle or conduction time, thereby correcting the output voltage to maintain the setpoint defined by the resistor ratio: Vout = Vref × (1 + R1/R2).
Materials
Thick-film or thin-film resistive material (ruthenium oxide, nickel-chromium) on ceramic substrate (alumina), with epoxy coating for protection. Termination materials: tin-plated copper alloy or solder-coated leads.
Technical Parameters
  • Package Type SOT-23, SOIC, MSOP, DFN
  • Power Rating 0.125W to 0.25W per resistor
  • Voltage Rating 50V to 200V
  • Resistance Tolerance ±0.1% to ±1%
  • Operating Temperature -55°C to +155°C
  • Temperature Coefficient ±25 ppm/°C to ±100 ppm/°C
Standards
IEC 60115, MIL-PRF-55342

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Feedback Resistor Network.

feedback resistor network voltage divider power supply regulation precision resistors voltage feedback closed-loop control voltage regulation circuit Feedback Resistor Network in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Power Supply Regulation

A circuit component within a signal conditioning system that stabilizes and regulates the power supply to ensure consistent voltage/current for sensitive electronic components.

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Analog Output Stage

The final stage in a Digital-to-Analog Converter (DAC) that converts processed electrical signals into continuous analog output signals suitable for driving external loads.

View Product Details

Output Buffer/Amplifier

An electronic component that provides signal conditioning, isolation, and power amplification for output signals from a conversion system.

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Engineering Analysis

Risks & Mitigation
  • Resistance drift over temperature
  • Thermal runaway in high-power applications
  • Moisture absorption affecting stability
  • Electromigration in thin-film resistors
FMEA Triads
Trigger: Overvoltage stress
Failure: Resistor breakdown/short circuit
Mitigation: Implement input surge protection, use resistors with higher voltage rating
Trigger: Thermal cycling
Failure: Resistance drift or open circuit
Mitigation: Select resistors with low TCR, ensure proper thermal management
Trigger: Contamination during manufacturing
Failure: Corrosion leading to parameter shift
Mitigation: Apply conformal coating, use hermetically sealed packages

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1% typical for precision applications, ±1% for commercial applications
Test Method
Four-wire Kelvin measurement at 25°C, temperature cycling test per MIL-STD-202

Buyer Feedback

★★★★☆ 4.7 / 5.0 (32 reviews)

"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Feedback Resistor Network so far."

"Testing the Feedback Resistor Network now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

What happens if the feedback resistor network fails?

Failure typically causes loss of voltage regulation - output may become unstable (oscillate), overvoltage (damaging loads), or undervoltage (system malfunction). Common failures include resistor drift, open circuit, or short circuit.

How do I select the right feedback resistor values?

Calculate based on desired output voltage and regulator IC reference voltage using Vout = Vref × (1 + R1/R2). Choose precision resistors with low temperature coefficient and adequate power rating for your application.

Can I use single resistors instead of a network?

While possible, integrated networks provide better matching, tracking, and space efficiency. Discrete resistors may have mismatched temperature coefficients causing voltage drift.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Feedback Network Ferrite Core/Plate