MC33368D - High-Voltage Critical Conduction PFC | onsemi
料号： MC33368D ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC33368D 概述
A power-factor controller is a power-management IC that shapes input current to improve the real-power factor of AC-to-DC equipment. In the broader hierarchy, the MC33368D belongs to the PFC controller class, then power-management ICs, and ultimately semiconductor devices used in offline power conversion. CRM operation reduces the switching loss associated with continuously conducting current and is commonly considered for compact power supplies where component count and thermal performance are important.
The MC33368D family is intended for boost preconverter front ends used ahead of downstream DC-DC converters. Its narrow-body SOIC package helps reduce board area, while the CRM control approach supports low-power, high-density power-supply implementations. The available evidence confirms the 16-SOIC package, critical-conduction operation, boost PFC function, high-voltage application class, and the manufacturer’s GreenLine positioning. Exact input-voltage, switching-frequency, current-limit, timing, and electrical-limit values were not included in the supplied verified excerpts and are therefore not inferred here.
Typical applications are off-line power supplies, compact AC-to-DC adapters, industrial power-conversion equipment, and consumer electronics with an upstream PFC stage. In these systems, the controller drives the boost switching element while external circuitry handles current sensing, voltage feedback, rectification, filtering, and protection. The MC33368D can help reduce conducted emissions and improve input-current quality when the complete PFC loop is designed and compensated correctly.
The main design consideration is that PFC performance depends on the surrounding converter, not only on the controller IC. Inductor selection, current-sense network, switch and diode ratings, safety spacing, feedback compensation, EMI filtering, and thermal design must be validated together. The narrow SOIC-16 footprint helps layout density, but high-voltage offline designs still require careful creepage, clearance, isolation, and safety-capacitor placement.
This product page synthesizes verified manufacturer and distributor information, package identity, application context, engineering design notes, and honest sourcing limitations for MC33368D. Because the supplied data does not include a confirmed drop-in substitute, no replacement MPN is presented as drop-in compatible.
MC33368D 最大额定值与电气特性
| Product Type | High-voltage GreenLine power factor controller |
| Control Topology | Critical-conduction mode (CRM) |
| Converter Role | Boost preconverter |
| Application Class | Off-line power supplies |
| 封装 | 16-pin narrow-body SOIC |
| Package Family | SOIC, surface-mount package |
| 安装类型 | Surface mount |
| 引脚数量 | 16 pins |
| Design Objective | Low power, high-density power supply |
| Board-Space Objective | Minimum board area |
| Component-Count Objective | Reduced component count |
| Power-Dissipation Objective | Low power dissipation |
| Input Power-Factor Function | Active power factor correction |
| Switching Mode | Critical-conduction boost operation |
| Manufacturer | onsemi |
MC33368D soic, surface-mount package 引脚配置指南
MC33368D（soic, surface-mount package 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： MC33368D.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC33368D 适用于 6 应用s: Compact Off-Line AC-to-DC Power Supply, Industrial Power Conversion, Consumer Electronics Power Adapter, High-Density Power-Supply Module, LED Power-Supply Front End, Renewable-Energy and Storage Interface.
Compact Off-Line AC-to-DC Power Supply
The MC33368D fits an upstream boost PFC stage in a compact off-line power supply because the verified onsemi description identifies it as a critical-conduction-mode controller for boost preconverter applications. Place it after the input rectifier and ahead of the downstream DC-to-DC stage, with external MOSFET, diode, inductor, sensing, feedback, and filtering networks. The CRM approach is intended to help reduce board area, component count, and power dissipation, but actual efficiency and power factor depend on the complete converter and compensation design.
推荐
Industrial Power Conversion
MC33368D can be used where an industrial power converter requires active input-current shaping before its main DC bus. Its verified boost-PFC role supports a front end that corrects current from a rectified industrial input while a downstream converter establishes the regulated output. Designers must select the external inductor and semiconductor ratings for the input range, validate current-sense limits, and maintain high-voltage clearances. The supplied evidence does not provide industrial qualification, so the final product must be assessed for its actual environmental requirements.
推荐
Consumer Electronics Power Adapter
For a consumer-electronics adapter, the MC33368D is suited to the PFC front end when the product requires improved input-current quality and reduced conducted emissions. The controller can drive a boost preconverter after rectification, allowing the main converter to receive a more favorable input waveform. A successful design must account for standby behavior, inrush, overvoltage, overcurrent, short-circuit protection, and the enclosure’s thermal conditions. The manufacturer’s narrow 16-SOIC package helps minimize footprint, but safety certification remains a system requirement.
推荐
High-Density Power-Supply Module
The MC33368D is appropriate for a high-density power module where minimizing board area and component count is central to the mechanical design. Its critical-conduction boost PFC architecture can reduce conduction duration compared with designs that maintain continuous current, while the narrow SOIC-16 package preserves routing space around the power stage. The tradeoff is that CRM design requires careful inductor sizing, frequency behavior, control-loop compensation, and EMI validation. Thermal performance must be evaluated from the complete converter rather than from the controller package alone.
推荐
LED Power-Supply Front End
The MC33368D can serve as the PFC controller in an LED power-supply front end when the LED driver is fed from a boosted DC bus. The active PFC function helps shape current before the downstream LED driver regulates output current or voltage. The external boost stage must be sized for the LED driver’s maximum power and transient response, while current-sense and voltage-feedback networks must remain noise-resistant. The supplied data does not identify an LED-specific reference circuit, so this application requires validation against the complete onsemi datasheet and target driver requirements.
推荐
Renewable-Energy and Storage Interface
MC33368D may be considered for the AC-facing PFC stage of an energy-storage or renewable-power interface when the system requires a corrected input current before conversion. Its boost preconverter role is compatible in principle with systems that use a downstream isolated or non-isolated DC converter. The controller is not a battery charger or storage controller by itself. Designers must define the input range, power rating, isolation boundary, protection strategy, and applicable safety requirements before integrating it into storage equipment.
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推荐产品汇总
工程参考数据： MC33368D ——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 |
|---|---|
| Product Type | High-voltage critical-conduction PFC controller |
| Control Mode | Critical-conduction mode (CRM) |
| Power-Stage Role | Boost preconverter |
| Input Class | Off-line rectified AC application |
| Package | 16-pin narrow-body SOIC |
| Brand | onsemi |
| Board-Space Objective | Minimum board area |
| Component-Count Objective | Reduced component count |
| Power-Dissipation Objective | Low power dissipation |
| Pin Count | 16 pins |
关键差异点
- CRM boost PFC positioning （对比 No confirmed substitute in the supplied cross-reference data)
- High-density package objective （对比 No confirmed substitute in the supplied cross-reference data)
- Low component-count orientation （对比 No confirmed substitute in the supplied cross-reference data)
设计说明
Place the MC33368D, current-sense components, and feedback components so that high dv/dt switching-node energy is not coupled into the control signals. Keep the boost-switch current loop compact and route the high-current power paths away from sensitive analog traces. Use the manufacturer’s recommended layout and verify creepage, clearance, and isolation requirements for the actual off-line voltage and applicable safety standard.
The MC33368D controls a boost PFC stage rather than supplying output power itself. Select the external MOSFET, boost diode, inductor, capacitors, and current-sense network for the input range, target power, switching behavior, and fault conditions. Do not infer a power rating from the controller MPN alone; calculate the stage from the complete datasheet limits and validate thermal margin with the assembled enclosure.
CRM operation can reduce some conduction losses, but conducted and radiated emissions still depend on switching-node dv/dt, common-mode paths, input-filter design, loop area, and shield or enclosure construction. Use an input EMI filter and snubber strategy only after measurements or validated reference design guidance. Incorrect compensation or overly aggressive filtering can increase controller stress or destabilize the PFC loop.
Avoid treating a functionally similar PFC IC as a drop-in substitute. Verify every pin, current-sense polarity, high-voltage rating, startup behavior, fault response, compensation range, and package footprint against the original design. The supplied cross-reference search did not identify a confirmed MC33368D replacement, so any substitution requires a deliberate engineering review and board-level qualification.
合规信息
The supplied verified data does not state MC33368D compliance status. Do not infer RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance from the manufacturer name or distributor listings.
