NCP1631: Power Factor Controller, 2-Phase, Interleaved
The NCP1631 is a controller for use in 2-phase interleaved power factor correction pre-converters. Interleaving consists of paralleling two small stages in lieu of a single big stage. This approach has several merits like ease of implementation, ability to use smaller components, and better distribution of heating. These attributes make the interleaved PFC topology attractive to slim form factor applications such as flat panel TVs and ultra-slim notebook adapters. Interleaving can also extend the power range of Critical Conduction Mode, which is an efficient and cost-effective (no need for low trr diodes) operating mode. The NCP1631 operates in Frequency Clamped Critical Conduction mode (FcCrM). The circuit utilizes frequency foldback to linearly decay the clamping frequency as a function of power. As a result, the NCP1631 provides optimized efficiency across the load range. In addition, the NCP1631 drivers exhibit a 180 phase shift for a significantly reduced current ripple, which lowers EMI and reduces the rms current in the bulk capacitor. The NCP1631 incorporates all the features necessary for building robust and compact interleaved PFC stages, with a minimum of external components. Available in SOIC-16 package.
特性- 180° out of phase operation
- Frequency foldback at low power
- Integrated overcurrent protection, overvoltage protection, UVLO, and brown-out protection
- Frequency clamped critical conduction mode (FcCrM) operation
| 优势- Low EMI and reduces RMS current in the bulk capacitor
- Improved light load efficiency
- Increased robustness with few external components
- Optimized efficiency over the load range
|
应用- Flat panel TVs
- SMPS
- Offline appliances requiring power factor correction
| 终端产品- LCD TV
- Computer power supplies
- Servers
|
封装
设计和开发工具 (1)
数据表 (1)
封装图纸 (1)
| Document Title | Document ID/Size | Revision |
|---|
| SOIC 16 LEAD | 751B-05 (38.2kB) | K |
培训教材 (1)
| Document Title | Document ID/Size | Revision | Revision Date |
|---|
| PFC1 - 先进的功率因数校正 | TND344CN/D (1078.7kB) | 0 | Oct, 2008 |
应用注释 (3)
评估板文档 (6)
参考手册 (1)
评估板与开发工具
| 产品 | 状况 | Compliance | 简短说明 |
|---|
| NCP1631PFCGEVB | Active | Pb-free | Interleaved PFC Evaluation Board |
产品订购型号
| 产品 | 状况 | Compliance | 封装 | MSL* | 容器 | 预算价格 (1千个数量的单价） |
|---|
| NCP1631DR2G | Active | Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.8 |
订购产品技术参数
| Product | PFC Mode | Frequency Operation | Control Mode | Topology | fSW Typ (kHz) | VCC Max (V) | Drive Cap. (mA) | UVLO (V) | Latch | UVP | Inhibition |
|---|
| NCP1631DR2G | CRM | Variable | Voltage Mode | Step-Up | Up to 500 | 20 | 500 / 500 | 9.5 - 12 | Yes | Yes | YES |
