This report describes a universal input, 5 V/1000 mA and 18 V/670 mA isolated flyback converter employing LNK6774V from the LinkSwitch-HP family of ICs. It contains the complete specification of the power supply, a detailed circuit diagram, the entire bill of materials required to build the supply, extensive documentation of the power transformer, along with test data and waveform plots of the most important electrical waveforms.
The LNK6774V device (U1) integrates an oscillator, an error amplifier and multi-mode control circuit, startup and protection circuitry and a high-voltage power MOSFET all on one monolithic IC.
| Manufacturer | Power Integrations |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | AC/DC SMPS - Multi Output |
| Eval Board Part Number | RDK-321-ND |
| Eval Board Supplier | Power Integrations |
| Eval Board |
Board not Stocked
|
| AC Voltage |
115 V
230 V Universal (115 / 230V) |
| Outputs and Type |
2 Non-Isolated
|
| Voltage Out: Highest Current First |
5V, 18V
|
| Current Out |
1A, 670mA
|
| Output Power |
17.1 W
|
| Efficiency @ Conditions |
>85%, 120 ~ 255 VAC, 5/18V @ 1000/670 mA
|
| No-load Input Power @ Voltage |
100 mW @ 230 V
|
| Features |
Current Limit (Adj. or Fixed)
Over Voltage Protection Thermal Protection Under Voltage Protection, Brown-Out |
| Switching Frequency |
132 kHz
|
| Internal Switch |
Yes
|
| Component Count + Extras |
40 + 3
|
| Voltage In |
90 ~ 265 VAC
|
| Application / Target Market |
LCD TV / Monitor
|
| Design Author |
Power Integrations
|
| Main I.C. Base Part |
LNK6774V
|
| Date Created By Author | 2012-09 |
| Date Added To Library | 2015-08 |
Austria
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