KA5H0280RYDTU

Duty Cycle:	67%
Base Part Number:	KA5H0280
Mounting Type:	Through Hole
Supplier Device Package:	TO-220F-4L (Forming)
Package / Case:	TO-220-4 Full Pack (Formed Leads)
Operating Temperature:	-25°C ~ 85°C (TA)
Control Features:	Soft Start
Fault Protection:	Current Limiting, Over Load, Over Temperature, Over Voltage
Frequency - Switching:	100kHz
Series:	FPS™
Voltage - Supply (Vcc/Vdd):	8.8 V ~ 30 V
Voltage - Start Up:	15V
Topology:	Flyback, Forward
Voltage - Breakdown:	800V
Internal Switch(s):	Yes
Output Isolation:	--
Part Status:	Obsolete
Packaging:	Tube

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KA5H0280RYDTU – AC DC Converters, Offline Switchers Working Principle

KA5H0280RYDTU, also known as a TO-92 package converter, is a type of power management integrated circuit integrated in PMIC. It is typically utilized to convert alternating current (AC) to a direct current (DC) supply. and is used typically in power supplies and other electronic devices requiring a low voltage, high current DC source. The KA5H0280RYDTU circuit is composed of several components.The primary component of the KA5H0280RYDTU is the synchronous rectifier, which is a device that is related to diode-like rectifier but performs more efficiently. This rectifier is comprised of a metal-oxide-semiconductor field-effect-transistor (MOSFET). The MOSFET\'s source and drainterminals act as two electrodes of the synchronous rectifier. The MOSFET is then connected to the AC supply via a resistor and a capacitor. When the AC supply voltage is lower than the MOSFET’s gate voltage, the gate hinders the flow of current and thus prevents the diode from conducting current.The synchronous rectifier changes the AC current then to DC current by using an integrated transformercoupled switch. This device contains an oxide layer between a pair of transformer windings, in order to maintain electrical separation between both of the windings and an oxide layer between the switches to boost its voltage. The synchronous rectifier then boosts the DC output current by applying a current controlling circuit. This current controlling circuit consists of a transistor, which is connected in series with the transformer-coupled switch to allow the current flow through the transformer-switch. The output of the KA5H0280RYDTU is then regulated by an internal high-side fault comparator. The comparator senses the output voltage and adjusts it accordingly. This helps the KA5H0280RYDTU to operate properly irrespective of load or output values. Finally, the KA5H0280RYDTU contains a special protection circuit that is used to monitor the voltage and current conditions and protect the main electronics from overload. This protection circuit features an overcurrent sensing circuit, an under-voltage sensing circuit, and a thermal sensing circuit.The KA5H0280RYDTU is used by manufacturers to power numerous small electronic devices such as USB chargers, laptop power supplies, and other portable electronics. The circuit is also widely used in UPS systems, motor control, alarm systems and many other applications.In summary, the KA5H0280RYDTU is a type of power management integrated circuit (PMIC) used to convert AC to DC by utilizing a synchronous rectifier, a transformer-coupled switch, a current controlling circuit, an internal voltage regulator and a protection circuit. It is widely used in various electronic devices, including laptop power supplies and USB chargers.

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