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LNK3771D-H003

High-Efficiency Off-line CV Flyback Switcher IC with Integrated 725 V / 900 V Primary MOSFET, Low No-Load, and Synchronous Rectification

Applications

Product Details

The LinkSwitch-XT2SR family dramatically increases the efficiency of auxiliary power supplies used in appliances, consumer products and industrial applications. Ideal for non-isolated designs with a high current, 5 V output, this advanced flyback controller can achieve >90% full load efficiency. High efficiency is maintained over to load range, with >85% efficiency at 100 mW load. No-load consumption is <5 mW.

The default 5 V main output can be adjusted via optional external feedback resistors. Power for start-up and normal operation is supplied from the DRAIN and VOUT pins, eliminating the need for a bias winding and associated

circuitry. The SO-16 package and a low number of external components make the LinkSwitch-XT2SR ICs ideal for compact designs.

Specifications

Specifications
Output Power (Max) - Open Frame, 230V 7.00 W
Output Power (Max) - Open Frame, Univ 6.00 W
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
Breakdown Voltage 725 V
Voltage - Output (Min) 5.00 V
Voltage - Output (Max) 5.00 V
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
IC Package SO-16B
Internal Switch Yes
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Control Features
Synchronous Rectification
Frequency Jittering
Auto-Restart/Latching Fault Response
On/Off Control
Protection Features
Open SR FET Detection
Output Overvoltage
Overtemperature
Topology Flyback
Product Sub-Type PMIC
MSL Rating 3