LNK563PG

Series:	LinkSwitch®-LP
Packaging:	Tube
Part Status:	Active
Output Isolation:	Isolated
Internal Switch(s):	Yes
Voltage - Breakdown:	700V
Topology:	Flyback
Voltage - Supply (Vcc/Vdd):	--
Duty Cycle:	70%
Frequency - Switching:	83kHz
Power (Watts):	2.5W
Fault Protection:	Current Limiting, Open Loop, Over Temperature, Short Circuit
Control Features:	--
Operating Temperature:	-40°C ~ 150°C (TJ)
Package / Case:	8-DIP (0.300", 7.62mm), 7 Leads
Supplier Device Package:	DIP-8B
Mounting Type:	Through Hole

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IntroductionThis article will discuss the application field and working principle of the LNK563PG Offline Switcher, a Pulse-Width Modulator (PMIC) AC / DC converter used in power management design. It is a low-cost, low-power device that can provide high efficiency, low-output ripple conversion from AC to DC. This device features a unique internal power brick design that enables it to guarantee fixed-frequency current-mode operation at up to 100 kHz. Furthermore, the LNK563PG supports power-save modes and current limit protection. It also has a wide input voltage range that allows the switcher to be used in a variety of applications.Application FieldsLNK563PG Offline Switchers have applications in a range of industries, from sophisticated technologies such as industrial robotics to heavily used consumer products.The LNK563PG can be used for powering devices that require voltage conversion in a variety of industrial applications. This includes factory automation and robotics, which use automation to reduce costs and improve efficiency. The switcher is also suitable for automotive and aviation applications, where it is used to power vehicle electronics such as in-vehicle entertainment systems and on-board diagnostics.In the consumer electronics industry, the LNK563PG can be used for a range of home entertainment systems, such as TVs, DVD players, audio amplifiers and gaming systems. This is because it provides the power needed for digital components to run without disruption. The LNK563PG is also suitable for powering digital media players and MP3 players, which make use of the switcher’s low-noise output when switching between digital sections.The LNK563PG is also suitable for powering domestic appliances, such as refrigerators, dishwashers, washing machines and freezers. It is able to provide reliable and energy efficient energy consumption that these products need in order to run more efficiently.Working Principle The LNK563PG works on a fixed-frequency current mode technique. The main components responsible for its operation are the primary-side winding inductor, error-amplifier, driver and power MOSFET.The device begins by sensing the input voltage to determine the desired output voltage. A feedback comparison is then made between the sensed output voltage and the setpoint; the error-amplifier generates a pulse-width modulated (PWM) signal based on the comparison. The PWM signal is then sent to the driver, which turns the power MOSFET ON and OFF, providing current to the winding inductor. This creates a voltage across the inductor, which produces an output voltage that is regulated to the desired setpoint.The switching frequency of the LNK563PG can be adjusted via a resistor, allowing for flexible frequency shifting. A series of protections are built into the device to ensure secure, efficient operation. These include a low line under-voltage protection and an over-current protection.ConclusionThe LNK563PG is an efficient, low-voltage and low-power AC/DC converter. Its unique internal power brick design enables it to guarantee fixed-frequency current-mode operation in a variety of applications. It is suitable for a range of industrial and consumer products, such as factory automation, automotive and aviation electronics, home entertainment systems and domestic appliances. The device works on a fixed-frequency current mode technique, which provides a regulated output voltage based on a comparison between the setpoint and sensed voltage. A series of protections are built in for secure and efficient operation.

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