NCP1051C
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NCP1051C 數據表
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詳細說明
The NCP1050 through NCP1055 are monolithic high voltage regulators that enable end product equipment to be compliant with low standby power requirements. This device series combines the required converter functions allowing a simple and economical power system solution for office automation, consumer, and industrial products. These devices are designed to operate directly from a rectified AC line source. In flyback converter applications they are capable of providing an output power that ranges from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V, and 3.0 W to 20 W with a variable AC input that ranges from 85 V to 265 V.These devices are available in economical 8−pin dual−in−line and 4−pin SOT−223 packages.Features• Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding• Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications• Converter Output Overload and Open Loop Protection• Auto Restart Fault Protection• IC Thermal Fault Protection• Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response• Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI• Low Power Consumption Allowing European Blue Angel Compliance• On−Chip 700 V Power Switch Circuit and Active Startup Circuit• Rectified AC Line Source Operation from 85 V to 265 V• Input Undervoltage Lockout with Hysteresis• Oscillator Frequency Options of 44 kHz, 100 kHz, 136 kHz• Pb−Free Packages are AvailableTypical Applications• AC−DC Converters• Wall Adapters• Portable Electronic Chargers• Low Power Standby and Keep−Alive Supplies
主要特徵
- Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding
- Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications
- Converter Output Overload and Open Loop Protection
- Auto Restart Fault Protection
- IC Thermal Fault Protection
- Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response
- Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI
- Low Power Consumption Allowing European Blue Angel Compliance
- On−Chip 700 V Power Switch Circuit and Active Startup Circuit
- Rectified AC Line Source Operation from 85 V to 265 V
- Input Undervoltage Lockout with Hysteresis
- Oscillator Frequency Options of 44 kHz, 100 kHz, 136 kHz
- Pb−Free Packages are Available
規格
以下是所選零件的基本參數,涉及零件的特性及其所屬類別。
Manufacturer | ON Semiconductor | Product Category ! | IC Chips |
常見問題解答
What is NCP1051C?
The NCP1051C is a switch-mode power supply (SMPS) controller designed by ON Semiconductor. It is specifically designed for Power Factor Correction (PFC) applications in power supplies. The NCP1051C helps improve power factor and efficiency in AC/DC power supply designs.
How Does NCP1051C Work?
The NCP1051C operates as a critical conduction mode boost PFC controller. It controls the power factor correction circuit to ensure that the input current waveform follows the input voltage waveform, resulting in a high power factor. The controller adjusts the switching frequency and duty cycle to achieve efficient power conversion.
How Many Pins does NCP1051C have and What are the Functions of the Pinout Configuration?
The NCP1051C is housed in an 8-pin PDIP (Plastic Dual In-Line Package) package. The pinout configuration includes:
- VCC: Power supply pin for the controller.
- VREF: Reference voltage output pin.
- COMP: Compensation pin for loop control.
- VF: Feedback voltage input pin for PFC regulation.
- IPK: Peak current sense input pin.
- GND: Ground pin.
- CS: Current sense input pin.
- RT: Timing resistor pin for setting the oscillator frequency.
What are the Pros and Cons of NCP1051C?
Pros:
- Power Factor Correction: Improves power factor and efficiency in power supply designs.
- Compact Package: Housed in an 8-pin PDIP package for space-saving designs.
- Efficient Operation: Critical conduction mode boost controller for high efficiency.
- Loop Control: Built-in compensation functionality for stable operation.
- Cost-Effective: Provides cost-effective PFC solutions for power supplies.
Cons:
- Application Specific: Primarily designed for PFC applications, may not be suitable for other SMPS designs.
- External Components: Requires external components for complete PFC implementation.
- Complexity: PFC design considerations may require specialized knowledge for optimal performance.
Are There Any Equivalents/Alternatives to NCP1051C for Recommendation?
- Alternatives to the NCP1051C include the UCC28070 from Texas Instruments and the FAN7529 from Fairchild Semiconductor.
- Comparable parts to the NCP1051C are the L6561 from STMicroelectronics and the PFC02 from Microchip Technology.
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