This document is an engineering prototype report describing a universal input dual output Flyback converter providing an isolated and non-isolated output voltage for a motor application employing the LNK304P.
The document contains the power supply specification, schematic, bill-of-materials, transformer documentation, printed circuit layout, and performance data.
LinkSwitch-TN is specifically designed to replace all linear and capacitor-fed (cap dropper) non-isolated power supplies in the under 360 mA output current range at equal system cost while offering much higher performance and energy efficiency.
LinkSwitch-TN devices integrate a 700 V power MOSFET, oscillator, simple On/Off control scheme, a high-voltage switched current source, frequency jittering, cycle-by-cycle current limit and thermal shutdown circuitry onto a monolithic IC. The start-up and operating power are derived directly from the voltage on the DRAIN pin, eliminating the need for a bias supply and associated circuitry in buck or flyback converters. The fully integrated auto-restart circuit in the LNK304-306 safely limits output power during fault conditions such as short-circuit or open loop, reducing component count and system-level load protection cost.
A local supply provided by the IC allows use of a non-safety graded optocoupler acting as a level shifter to further enhance line and load regulation performance in buck and buck-boost converters, if required.
| Manufacturer | Power Integrations |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | AC/DC SMPS - Multi Output |
| Eval Board |
Board not Stocked
|
| AC Voltage |
115 V
230 V Universal (115 / 230V) |
| Outputs and Type |
1 Isolated + 1 Non
|
| Voltage Out: Highest Current First |
12V, 15V
|
| Current Out |
100mA, 25mA
|
| Output Power |
1.6 W
|
| Efficiency @ Conditions |
>70%, 105 ~ 265 VACin
|
| No-load Input Power @ Voltage |
100 mW @ 230 VAC
|
| Features |
Current Limit (Adj. or Fixed)
Open Circuit Protection Short Circuit Protection Thermal Protection |
| Switching Frequency |
66 kHz
|
| Internal Switch |
Yes
|
| Component Count + Extras |
19 + 0
|
| Voltage In |
85 ~ 265 VAC
|
| Application / Target Market |
Motor Control
|
| Design Author |
Power Integrations
|
| Main I.C. Base Part |
LNK304
|
| Date Created By Author | 2005-04 |
| Date Added To Library | 2014-06 |
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