NCL2801CDADR2G - High-Efficiency CrM Boost PFC Controller
料号： NCL2801CDADR2G ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.0312 | $1.03 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
NCL2801CDADR2G 概述
A power-factor controller is an integrated circuit that shapes input current drawn from an AC mains line so that current tracks voltage and the upstream system approaches unity power factor. In the broader hierarchy, the NCL2801 belongs to AC-DC power conversion, power management integrated circuits, and boost PFC controllers. Correct operation reduces reactive current, line-current distortion, and stress in upstream magnetic and capacitor components.
The NCL2801 uses THD Enhancer technology to improve line-current total harmonic distortion across an extended operating range. It operates classically in Critical Conduction Mode at high loads. When load decreases, Valley Count Frequency Fold-back forces discontinuous conduction by introducing dead time corresponding to a fixed number of valleys, improving standby behavior while maintaining regulation. The 8-SOIC package supports compact offline-lighting designs.
The controller is intended to drive PFC boost stages rather than directly switching the mains-connected power stage. A typical implementation combines the NCL2801 with a boost inductor, switching MOSFET, current-sense resistor, bridge rectifier, bulk capacitor, safety-rated components, and LED-driver downstream circuitry. The controller supplies control and protection functions, while the external power components determine available output power and conversion ratio.
Typical applications include LED lamps and luminaires, electronic ballasts, compact offline LED power supplies, and cost-effective high-efficiency AC-DC front ends. The device is especially useful where low line-current THD, low standby power, and tolerance of high ripple on the bulk capacitor are important. Its lighting-focused feature set helps designers meet EMI and input-current-shape requirements without relying on a more complex digital controller.
Design the feedback network and compensation for the actual boost converter, not as a generic voltage-regulator stage. Keep the current-sense loop short, isolate high-voltage switching nodes from sensitive control traces, and follow the manufacturer's application guidance for layout and component values. Review the datasheet limits before selecting the MOSFET, inductor, capacitor, and safety components.
This page combines the verified manufacturer description, package and distributor information, application guidance, and engineering-oriented replacement limitations. It does not infer unprovided electrical limits or claim a pin-compatible replacement when the available cross-reference results do not establish one.
直接替换替代料： NCL2801CDADR2G ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
NCL2801CDADR2G
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联系询价
查看数据手册 →NCL2801CDADR2G 最大额定值与电气特性
| Product Type | Power Factor Controller |
| Control Topology | Current-mode Critical Conduction Mode (CrM) Boost PFC |
| Low-Load Conduction | Discontinuous Conduction Mode (DCM) |
| Line-Current THD Technique | THD Enhancer |
| Frequency Fold-back | Valley Count Frequency Fold-back (VCFF) |
| VCC Start Voltage | 12.5 V |
| Standby Power Behavior | Enhanced by VCFF method |
| Application Category | LED Lighting |
| Input Power Stage | AC mains boost PFC front end |
| 封装 | 8-SOIC |
| Package Width | 0.154 in (3.90 mm) |
| 安装类型 | Surface Mount |
| Manufacturer | onsemi |
| Lifecycle Evidence | Manufacturer product page is available |
| Reference Inventory | 7,552 pieces |
| Reference Unit Price | $1.0312 per unit |
NCL2801CDADR2G 0.154 in (3.90 mm) 引脚配置指南
NCL2801CDADR2G（0.154 in (3.90 mm) 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： NCL2801CDADR2G.
请参阅 数据手册 以查看完整引脚配置。
典型应用
NCL2801CDADR2G 适用于 6 应用s: LED Luminaire Power Supplies, Electronic Ballast Power Conversion, High-Efficiency Offline AC-DC Power Supplies, Compact LED Driver Power Front Ends, Mains-Connected Lighting Power Supplies, Renewable-Energy and Smart-Lighting Power Front Ends.
LED Luminaire Power Supplies
NCL2801CDADR2G fits the boost PFC front end of an offline LED luminaire where the bulk capacitor can experience substantial ripple. Its current-mode CrM control is intended to support high-efficiency operation at higher loads, while THD Enhancer technology addresses line-current distortion across a wider operating range. The controller is used with external MOSFET, inductor, rectifier, current-sense, feedback, and protection components. The 8-SOIC package also keeps the control section compact, but final transformer, capacitor, inductor, safety, and thermal sizing depends on the required output power and mains range.
推荐
Electronic Ballast Power Conversion
NCL2801CDADR2G can be used in electronic ballast front ends that require a boost PFC stage ahead of a downstream lighting converter. Its verified manufacturer positioning emphasizes LED lighting, high bulk-capacitor ripple tolerance, low line-current THD, and improved standby behavior through VCFF. The device does not directly replace the ballast's switching MOSFET or inductor; those external components must be selected from the actual converter design. Confirm line regulation, protection requirements, and operating limits against the official datasheet before releasing a ballast design.
推荐
High-Efficiency Offline AC-DC Power Supplies
NCL2801CDADR2G is appropriate for an AC mains input stage that benefits from near-unity power-factor current shaping and reduced line-current THD. The CrM boost architecture is particularly relevant when high ripple appears across the bulk capacitor, while THD Enhancer and VCFF techniques target efficiency and standby behavior across load conditions. The controller remains a front-end building block rather than a complete power supply. Its inductor, MOSFET, rectifier, bulk capacitor, current-sense network, EMI filter, and safety components determine the practical output capability.
推荐
Compact LED Driver Power Front Ends
NCL2801CDADR2G suits compact LED-driver architectures where board area and low-load behavior are important. The 8-SOIC package provides the control IC in a standard surface-mount format, and VCFF can reduce unnecessary switching activity when the load falls. That benefit does not remove the need for careful standby-consumption measurement because the supplied excerpts do not state a numeric standby-current limit. Validate EMI, line-current THD, surge immunity, thermal margin, and safety isolation over the complete input-voltage and output-load range.
推荐
Mains-Connected Lighting Power Supplies
NCL2801CDADR2G can be integrated into mains-connected lighting power supplies that use a boost PFC stage to shape input current. Its lighting-specific feature set addresses the bulk-capacitor ripple commonly encountered in offline converters and aims to improve THD and standby power. Because the controller operates near hazardous mains-derived circuitry, the reference design must include appropriate creepage, clearance, isolation, surge protection, and safety-rated components. The verified data identifies the product and package but does not provide a complete safety certification record.
推荐
Renewable-Energy and Smart-Lighting Power Front Ends
NCL2801CDADR2G may be considered for lighting-oriented power front ends that need controlled input current and improved efficiency as load changes. Its THD Enhancer technique addresses line-current distortion, and VCFF provides a defined transition toward DCM at reduced load. In a product with wireless control, energy metering, or microcontroller supervision, the PFC controller can remain upstream while digital logic handles monitoring and user functions. The interface requirements, protection thresholds, and timing between the controller and any supervisory electronics are not supplied in the verified excerpts and must be checked in the datasheet.
推荐
工程参考数据： NCL2801CDADR2G ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NCL2801CDADR2G |
|---|---|---|
| Product Type | Power Factor Controller | Power Factor Controller |
| Control Topology | Current-mode CrM Boost PFC | Current-mode CrM Boost PFC |
| Low-Load Mode | DCM with VCFF | DCM with VCFF |
| THD Technique | THD Enhancer | THD Enhancer |
| VCC Start Voltage | 12.5 V | 12.5 V |
| Package | 8-SOIC | 8-SOIC |
| Brand | onsemi | onsemi |
| Application Category | LED Lighting | LED Lighting |
| Reference Unit Price | $1.0312 | $1.0312 |
| Verified Package Width | 0.154 in (3.90 mm) | 0.154 in (3.90 mm) |
| Manufacturer Lifecycle Evidence | Official product page available | Official product page available |
| Verified Cross-Reference Status | No distinct drop-in MPN verified | No distinct drop-in MPN verified |
关键差异点
- CrM boost PFC control optimized for lighting systems （对比 Generic 8-pin PFC controllers)
- THD Enhancer and VCFF feature combination （对比 Generic PFC controllers without verified low-load control)
- Documented 8-SOIC implementation target （对比 Unverified substitute MPNs)
设计说明
Treat NCL2801CDADR2G as the PFC control element, not as the complete boost converter. Select the external MOSFET, inductor, rectifier, bulk capacitor, current-sense resistor, and feedback network together so the switch current, duty ratio, ripple current, voltage stress, and thermal dissipation meet the required output power. The supplied verified data confirms a 12.5 V VCC start voltage but does not provide the complete operating window, so use the manufacturer datasheet for final ratings.
Keep the current-sense and control traces short and physically separated from the high-current switching loop. The boost MOSFET drain, inductor, and high-voltage capacitor can produce fast voltage transitions; route those conductors compactly while keeping sensitive feedback and gate-drive paths away from them. Confirm the exposed pin functions and recommended land pattern in the official NCL2801 datasheet before PCB release.
NCL2801 is positioned for low line-current THD and lighting applications, but low controller-generated THD does not by itself guarantee system-level EMI compliance. Evaluate the rectifier, input filter, boost switch node, shield or snubber strategy, Y-capacitor arrangement, and output capacitor impedance over the complete load and line range. Use conducted and radiated measurements on the finished product rather than relying only on the controller specification.
合规信息
The supplied verified results identify onsemi as the manufacturer but do not provide a RoHS, REACH, lead-free, halogen-free, conflict-minerals, or safety-certification statement. Compliance fields therefore remain unknown rather than being inferred.
