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Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Output 1 | 19 V / 3.5 A |
Description
The NCP1239 is a fixed-frequency current-mode controllerfeaturing a high-voltage start-up current source to provide a quick andlossless power-on sequence. This controller is pin-to-pin compatiblewith the former NCP1236. Only few components need to be changedin order to plug this new controller generation in an existing board.This application note will compare the performance of a typical 65-Wapplication evaluation board originally equipped with the NCP1236controller and upgraded with a NCP1239.A NCP1236 demonstration board has been selected for this test.The specifications of this board are listed in Table 1.
Typical applications
- Auxiliary/Housekeeping Power Supplies
- Offline Battery Chargers
- Consumer Electronic Power Supplies
- AC−DC Adapters for Notebooks, LCD, and Printers
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | IR (A) | L (µH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744841330 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMB NiZn Common Mode Power Line Choke | 3 | 30 | 26 | 250 | 1500 | NiZn | 16 | 7.5 | 17.5 | THT | ||
| 744841414 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMB NiZn Common Mode Power Line Choke | 4 | 14 | 15 | 250 | 1500 | NiZn | 16 | 7.5 | 17.5 | THT |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | IR (A) | L (µH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples |
|---|