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Typical Application Schematic with LinkSwitch-XT2SR IC
LinkSwitch-XT2SR in SO-16B (D Package)
Typical Application Schematic with LinkSwitch-XT2SR IC
LinkSwitch-XT2SR in SO-16B (D Package)
LinkSwitch-XT2SR - Best-in-Class Efficiency in Light Load for Small Power Supplies

LinkSwitch-XT2SR

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

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Product
Data Sheet
Output Power (Max) - Open Frame, Univ
Output Power (Max) - Open Frame, 230V
Voltage - Input (Min)
Voltage - Input (Max)
Breakdown Voltage
Protection Features
Control Features
Voltage - Output (Min)
Voltage - Output (Max)
Internal Switch
Product Type
IC Package
Topology
Auto-Restart & Overvoltage Response
Auto-Restart Threshold
Over-Temperature Response
Temperature - Operating (Min)
Temperature - Operating (Max)
Switching Frequency (max)
Switching Frequency (Avg. 230 VAC)
MSL Rating
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3771D-H003

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Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 6.0 W
Output Power (Max) - Open Frame, 230V 7.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Breakdown Voltage 725 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Voltage - Output (Max) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3771D-H004

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 6.0 W
Output Power (Max) - Open Frame, 230V 7.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Breakdown Voltage 725 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3772D-H003

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 10.0 W
Output Power (Max) - Open Frame, 230V 12.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Breakdown Voltage 725 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Voltage - Output (Max) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3772D-H004

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 10.0 W
Output Power (Max) - Open Frame, 230V 12.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Breakdown Voltage 725 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3773D-H003

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 12.0 W
Output Power (Max) - Open Frame, 230V 15.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Breakdown Voltage 725 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Voltage - Output (Max) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3773D-H004

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 12.0 W
Output Power (Max) - Open Frame, 230V 15.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Breakdown Voltage 725 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3792D-H003

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 10.0 W
Output Power (Max) - Open Frame, 230V 12.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 484 V
Breakdown Voltage 900 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Voltage - Output (Max) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
LinkSwitch-XT2SR in SO-16B (D Package)

LNK3792D-H004

View Details
Data Sheet View PDF
Output Power (Max) - Open Frame, Univ 10.0 W
Output Power (Max) - Open Frame, 230V 12.0 W
Voltage - Input (Min) 85 V
Voltage - Input (Max) 484 V
Breakdown Voltage 900 V
Protection Features Open SR FET Detection, Output Overvoltage, Overtemperature
Control Features Synchronous Rectification, Frequency Jittering, Auto-Restart/Latching Fault Response, On/Off Control
Voltage - Output (Min) 5 V
Internal Switch Yes
Product Type IC
IC Package SO-16B
Topology Flyback
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold OL
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Switching Frequency (max) 66 kHz
Switching Frequency (Avg. 230 VAC) 66 kHz
MSL Rating 3
Showing 1 - 8 of 8 Products
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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.

Key Features

Ideal for Non-Isolated Applications

  • Low component count switcher solution with SR driver and integrated 3.3 V LDO (uVCC)
  • High-efficiency across load range
  • Accurate CV independent of transformer design or external components
  • Default 5 V output with no external feedback components
  • Adjustable VOUT using optional FEEDBACK pin
  • Simple two winding transformer
  • Compact package reduces PCB area

EcoSmart™ – Energy-Efficient

  • Less than 5 mW no-load at 230 VAC
  • • Enables designs that easily meet global energy efficiency regulations
  • • Achieves up to 90% full load efficiency with 5 V output

Advanced Protection / Safety Features

  • Hysteretic thermal shutdown (OTP)
  • Output OV protection with VOUT pin
  • Extended creepage between DRAIN pin and all other pins increases field reliability
  • 725 V MOSFET rating series for excellent surge withstand
  • 900 V switch rating for industrial applications and extra safety margin
  • Extremely low component count enhances reliability
  • Allows use of single-sided PCB and full SMD manufacturability

Green Package

  • Halogen free and RoHS compliant
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LinkSwitch-XT2SR - Best-in-Class Efficiency in Light Load for Small Power Supplies

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