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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
- AC−DC Adapters for Notebooks, LCD, and Printers
- Consumer Electronic Power Supplies
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-CMB NiZn Common Mode Power Line Choke, 3 A, 30 µH | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB NiZn Common Mode Power Line Choke | Rated Current3 A | Inductance30 µH | DC Resistance26 mΩ | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialNiZn | Length16 mm | Width7.5 mm | Height17.5 mm | MountTHT | ||||
| WE-CMB NiZn Common Mode Power Line Choke, 4 A, 14 µH | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB NiZn Common Mode Power Line Choke | Rated Current4 A | Inductance14 µH | DC Resistance15 mΩ | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialNiZn | Length16 mm | Width7.5 mm | Height17.5 mm | MountTHT |