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Description
The LNK305PN is a LinkSwitch-TN lowest component count, energy-efficient off-line Switcher, specifically designed to replace all linear and capacitor-fed (cap dropper) non-isolated power supplies in the under 360mA output current range at equal system cost while offering much higher performance and energy efficiency. LinkSwitch-TN devices integrate a 700V 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.
Title
AC-DC Off-Line Switcher, Integrated Power MOSFET, 85-265 VAC input, 66 KHz, 120 mA output, DIP-8
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LNK305PN description
The LNK305PN is a LinkSwitch-TN lowest component count, energy-efficient off-line Switcher. It is fabricated particularly as a substitute to every linear and capacitor-fed non-isolated power supplies in the under 360mA output current span at equal system cost while at the same time delivering great performance and energy efficacy. LNK305PN has an oscillator, a simple on and off control scheme, a 700V power MOSFET, a high-voltage switched current source, thermal shutdown circuitry onto a monolithic IC frequency jittering, and cycle-by-cycle current limit.
There is no need for a bias supply and connected circuits in flyback and buck converters since start-up and operating power are obtained from the voltage on the Drain. The completely incorporated auto-restart circuit in the IC inhibit output power through fault situations. Faulty situations maybe from short-circuit and open loop. To improve line and load regulation functioning, the LNK305PN offer a local supply to make it possible to use a unsafe graded optocoupler acting as a level shifter.
Pin configuration and their functions
D (Drain): Drain connection and it delivers internal operating current for start-up and also for steady-state process.
BP (Bypass): An external bypass capacitor of 0.1mF is connected at this point to the 5.8 Volts generated internally
FB (Feedback): This pin regulates the switching of the IC. During normal operation, however, when a current greater than 49 microamperes is supplied, the MOSFET switching is halted.
S (Source): Source connection for IC. The Bypass and Feedback ground is at this point.
LNK305PN specifications and features
v Completely incorporated auto-restart for short-circuit and open loop fault protection salvages component costs
v 66 kHz operation with accurate current limit, enables low cost off-the-shelf 1mH inductor
v It has stringent tolerances and slight temperature disparity
v It can endure high breakdown voltage of up to 700 Volts.
v Lowest Component Count Buck Converter Solution
v Frequency Jittering Dramatically Reduces EMI (~10dB)
v The minimum thermal shutdown temperature is a minimum of +135°C hence have high thermal shutdown temperature
v Remarkable great performance
v It can sustain buck, buck-boost and fly back schemes
v It consists of the following protection schemes; short circuit, heat overload, and open control loop
v It has brilliant line and load control
v It has a quick turn on without overshoot from its high bandwidth
v The current limit functionality discards line ripple
v The IC has 85 – 265 VAC universal input voltage
v It consists of current limit and hysteretic thermal protection in its makeup
v It is of high efficacy
v It has a high power factor
v Completely manufacturable in surface-mount device
v It is Eco smart meaning that it is exceptionally energy efficient
v normally utilizes 50/80mW in self-powered buck scheme at 115/230VAC input without load
Working principles of LNK305PN
LNK305PN combines a high-voltage power MOSFET switch with a power supply controller in one device. LNK305PN involves the application of a ON/OFF regulator to control the output voltage in contrast to regular pulse width modulator controllers. The LNK305PN controller comprises of an oscillator, feedback circuit, 5.8 Volts controller, bypass, under voltage circuit, over-temperature protection, current limit circuit, and leading edge blanking. The LNK305PN incorporates extra circuits for auto-restart.
Application of LNK305PN
LNK305PN finds applications in appliances, timers, LED drivers and industrial controls. This is achieved through a Universal Input Buck Converter that incorporates the LNK305PN: It is used to implement a circuit used as a non-isolated power supply which finds applications in appliance controls for instance rice cookers, and dishwashers. The circuit is also used in light-emitting diode drivers of night lights, and residential heating regulators.
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10000 buyer reviews from United States
Jessica Ross
Length of registration:7 years
The testing result for the Intergrated Circuits LNK305PN ordered from Utsource website was satisfactory. The device was tested for functionality, and all the parameters were within the specified range. The device was also tested for power consumption, and it was found to be within the specified range. The device was also tested for temperature, and it was found to be within the specified range. Ov
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03/17/2023
FRANCOIS
Length of registration:2 years
very happy with service, great product and fast delivery, thanks
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09/16/2022
franck HORDE
Length of registration:12 years
article conforme a l'annonce .
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04/16/2020
Angel Rodriguez
Length of registration:5 years
satisfaction
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12/08/2018
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LNK305PN
LNK305PN has several brands around the world that may have alternate names for LNK305PN due to regional differences or acquisition. LNK305PN may also be known as the following names:
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