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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

The L6565N is a current-mode primary SMPS Controller specifically designed to build offline Quasi-resonant ZVS (zero voltage switching at switch turn-on) flyback converters. Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET"s turn-on Converter"s power capability variations with the mains voltage are compensated by line voltage feedforward. At light load the device features a special function that automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. In addition to very low start-up and quiescent currents, this feature helps keep low the consumption from the mains at light load and be Blue Angel and Energy Star compliant. The IC includes also a disable function, an on-chip filter on current sense, an error amplifier with a precise reference voltage for primary regulation and an effective two-level overcurrent protection.
Frequency foldback for optimum standby efficiency
Quasi-resonant (QR) zero-voltage switching (ZVS) topology
Line feed forward to deliver constant power vs. mains change
Pulse-by-pulse and hiccup-mode OCP
Blue angel, energy star, energy 2000 compliant

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L6565N Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Through Hole
Number of Pins	8 Pin
Case/Package	DIP-8
Supply Voltage (DC)	10.3V (min)
Power Rating	1 W
Number of Outputs	1 Output
Output Current	400 mA
Number of Positions	8 Position
Quiescent Current	3.50 mA
Rise Time	40 ns
Fall Time	40 ns
Operating Temperature (Max)	150 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage (Max)	18 V
Supply Voltage (Min)	10.3 V
Input Voltage	10.3V ~ 18V
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Operating Temperature	-40℃ ~ 150℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17

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