LNK302DG - Brand New Power Integrations AC DC Converters, Offline Switchers
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Description
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.
Specifications and features
Cost Effective Linear/Cap Dropper Replacement. Lowest cost and component count buck converter solution. Fully integrated auto-restart for short-circuit and open loop fault protection – saves external component costs. LNK302 uses a simplified controller without auto-restart for very low system cost. 66 kHz operation with accurate current limit – allows low cost off-the-shelf 1 mH inductor for up to 120 mA output current. Tight tolerances and negligible temperature variation. High breakdown voltage of 700 V provides excellent input surge withstand. Frequency jittering dramatically reduces EMI (~10 dB) – minimizes EMI filter cost. High thermal shutdown temperature (+135 °C minimum).
Application Scenarios
Appliances and timers. LED drivers and industrial controls.
Comparison
Much Higher Performance over Discrete Buck and Passive Solutions. Supports buck, buck-boost and flyback topologies. System level thermal overload, output short-circuit and open control loop protection. Excellent line and load regulation even with typical configuration. High bandwidth provides fast turn-on with no overshoot. Current limit operation rejects line ripple. Universal input voltage range (85 VAC to 265 VAC). Built-in current limit and hysteretic thermal protection. Higher efficiency than passive solutions. Higher power factor than capacitor-fed solutions. Entirely manufacturable in SMD.
AdvantagesLinkSwitch-TN offers a cost-effective solution for replacing linear and capacitor-fed non-isolated power supplies. It provides higher performance and energy efficiency while maintaining an equal system cost. The integrated features, such as a 700 V power MOSFET, oscillator, and thermal shutdown circuitry, contribute to its superior performance. It also has a high breakdown voltage of 700 V for excellent input surge withstand. The frequency jittering feature reduces EMI and minimizes the cost of EMI filters. Furthermore, it has a high thermal shutdown temperature of +135 °C minimum.
DisadvantagesOne disadvantage of the LNK302DG model is that it does not have a fully integrated auto-restart circuit like the LNK304-306, which limits output power during fault conditions and reduces component count and system-level load protection cost. Additionally, if high line and load regulation performance is required in buck and buck-boost converters, an external non-safety graded optocoupler acting as a level shifter is needed, which may add to the overall cost.
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Similar parts: 1587 , Click to view
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
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Popular parts of the same kind
- Datasheet: Download LNK302DG
- Chipdatas Part: CD90-LNK302DG
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/01 12:18 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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The fee is charged according to the rule of PayPal.
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