行业组件数据 · 2026

反馈网络(电阻器)

A feedback network using resistors to regulate and stabilize voltage or current in power conversion circuits.

技术定义与适配语境
典型 反馈网络(电阻器) 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

A feedback network composed of resistors is a critical component in power conversion circuits, such as DC-DC converters or voltage regulators. It forms part of the control loop that monitors the output voltage or current and provides a feedback signal to the control IC. This network adjusts the duty cycle or switching frequency to maintain stable output under varying load conditions, ensuring precise regulation, improved efficiency, and protection against overvoltage or overcurrent.

组件规格

定义
A feedback network composed of resistors is a critical component in power conversion circuits, such as DC-DC converters or voltage regulators. It forms part of the control loop that monitors the output voltage or current and provides a feedback signal to the control IC. This network adjusts the duty cycle or switching frequency to maintain stable output under varying load conditions, ensuring precise regulation, improved efficiency, and protection against overvoltage or overcurrent.
工作原理
The feedback network operates by creating a voltage divider using resistors to sample the output voltage. This sampled voltage is compared to a reference voltage within the control IC. Any deviation generates an error signal, which adjusts the switching elements (e.g., MOSFETs) to correct the output. In current-mode control, it may also sense current through a shunt resistor. The network's resistor values determine the gain, bandwidth, and stability of the feedback loop, influencing transient response and noise immunity.
材料
Resistors: Typically made of thick-film or thin-film ceramic (e.g.ruthenium oxide) on alumina substrateswith nickel barrier layers and tin-lead or lead-free solder plating. Substrates: FR4 fiberglass epoxy for PCBs. Connectors: Copper alloy with gold or tin plating. Encapsulation: Epoxy resin or silicone for protection.
Power Rating
0.125W to 1W
Voltage Rating
Up to 200V
Resistance Tolerance
±1% to ±5%
Operating Temperature
-55°C to +155°C
Temperature Coefficient
±100 ppm/°C
标准
ISO 9001IEC 60115IPC-A-610

行业分类与别名

反馈网络(电阻器) 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Overheating from high current or poor ventilation->Resistor degradation or open circuit->Use resistors with adequate power rating, implement thermal management, and design with derating guidelines.
Manufacturing defects or contamination->Short circuit or unstable resistance->Apply quality control per IEC 60115, use automated optical inspection (AOI), and conduct burn-in testing.
Environmental factors like humidity or vibration->Corrosion or mechanical damage->Apply conformal coating, use ruggedized components, and design for shock/vibration resistance.

工业生态与工程逻辑

0
Thermal runaway due to excessive power dissipation
1
Noise interference affecting regulation accuracy
2
Component aging leading to drift in resistance values

合规与检测

tolerance
Resistance tolerance typically ±1% to ±5%, with tighter tolerances for precision applications
test method
Testing per IEC 60115 for resistance, power rating, and temperature coefficient; in-circuit testing for functionality; environmental testing for reliability.

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采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the purpose of a feedback network in a power conversion circuit?

It provides a feedback signal to the control IC to regulate output voltage or current, ensuring stability and efficiency under varying loads.

How do resistor values affect the feedback network?

Resistor values set the gain and bandwidth of the control loop, impacting stability, transient response, and noise rejection.

Can feedback networks be used in AC-DC converters?

Yes, they are commonly used in both AC-DC and DC-DC converters to maintain regulated output.

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URN:CNFX:ME:UNIT:FEEDBACK_NETWORK_RESISTORS_