NCP1612: Power Factor Controller, Enhanced, High Efficiency
The NCP1612 is active power factor corrected (PFC) controller specifically designed for use as a boost pre-converter in ac-dc adapters, flat TVs, lighting ballasts and other medium powered offline applications. The controller is based on an innovative Current Controlled Frequency Foldback(CCFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1612 linearly reduces the frequency down to about 20 kHz when the current is at a null. CCFF maximizes the efficiency at both nominal and light load. In particular, the standby losses are reduced to a minimum. The controller features a robust suite of protection features to properly handle an array of power supply operating and fault conditions. This device is particularly suited a PFC stage for LLC controllers due to its dedicated PFC_Okay Output.
特性- Critical conduction mode with current controlled frequency foldback
- Dynamic Response Enhancer
- Soft Overvoltage Protection
- -500 mA/+800 mA Drive Capability
- Valley turn on
- Wide Vcc Range of 9.5-35 Vdc
- Two Vcc startup versions: 10.5 V (A) and 17 V (B)
- AC Line Brownout Detection
- Cycle-by-cycle switch current monitoring
- Saturated inductor and shorted boost or bypass diode detection
- PFC Okay Output
- Latch Off Input
- Independent bulk overvoltage and undervoltage monitoring
- Open Ground Pin Fault Monitoring
- Near Unity Power Factor
- Thermal Shutdown
| 优势- Optimizes conversion efficiency across load range
- Improved transient response for line and load steps
- Reduces accoustic noise and stress in the event of an overvoltage fault
- Supports wide range of MOSFETs and power levels
- Improved efficiency amd reduced EMI generation
- Easy to bias even under light load or high line conditions
- B version allows smaller Vcc capacitor and faster startup in self biased applications
- Protects boost stage power components during line fault conditions
- Enhances system robustness
- Enhanced safety monitoring without extra components
- Can enable downstream controller of stable PFC rail
- Simplifies implemented latch protection for power supply
- Increased system reliablity
- Simplifies safety testing
|
应用- Offline Power Supplies
- Lighting Ballasts
- LED Lighting Drivers and Power Supplies
| 终端产品- Flat TV
- All-In-One Computers
- High Powered Adapters
- LED Lighting
|
封装
设计和开发工具 (1)
封装图纸 (1)
| Document Title | Document ID/Size | Revision |
|---|
| SOIC-10 NB | 751BQ (56.7kB) | B |
应用注释 (4)
数据表 (1)
评估板文档 (5)
评估板与开发工具
| 产品 | 状况 | Compliance | 简短说明 |
|---|
| NCP1612GEVB | Active | Pb-free | 160 W Low Profile 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） |
|---|
| NCP1612A1DR2G | Active | Pb-free
Halide free | SOIC-10 NB | 751BQ | 1 | Tape and Reel | 2500 | $0.3 |
| NCP1612A2DR2G | Active | Pb-free
Halide free | SOIC-10 NB | 751BQ | 1 | Tape and Reel | 2500 | $0.3 |
| NCP1612A3DR2G | Active | Pb-free
Halide free | SOIC-10 NB | 751BQ | 1 | Tape and Reel | 2500 | $0.4 |
| NCP1612ADR2G | Active | Pb-free
Halide free | SOIC-10 NB | 751BQ | 1 | Tape and Reel | 2500 | $0.3 |
| NCP1612BDR2G | Active | Pb-free
Halide free | SOIC-10 NB | 751BQ | 1 | Tape and Reel | 2500 | $0.3 |
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 |
|---|
| NCP1612A1DR2G | DCM
CRM | Variable | Current Mode | Step-Up | Variable | 35 | 500 / 800 | 9 | Yes | Yes | Yes |
| NCP1612A2DR2G | DCM | Variable | Current Mode | Step-Up | Variable | 35 | 500 / 800 | 9 | Yes | Yes | Yes |
| NCP1612A3DR2G | CRM
DCM | Fixed | Current Mode | Step-Up | Variable | 35 | 500 / 800 | 9 | Yes | Yes | Yes |
| NCP1612ADR2G | DCM
CRM | Variable | Current Mode | Step-Up | Variable | 35 | 500 / 800 | 9 | Yes | Yes | Yes |
| NCP1612BDR2G | CRM
DCM | Variable | Current Mode | Step-Up | Variable | 35 | 500 / 800 | 9 | Yes | Yes | Yes |
