AQY221N2VW

Series:	PhotoMOS™ AQY
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC, DC (RF)
Voltage - Input:	1.14VDC
Voltage - Load:	0V ~ 40V
Load Current:	120mA
On-State Resistance (Max):	12.5 Ohms
Termination Style:	SMD (SMT) Tab
Package / Case:	4-SMD (0.175", 4.45mm)
Supplier Device Package:	4-SSOP

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AQY221N2VW Application Field and Working PrincipleThe AQY221N2VW is a common type of solid state relay. This type of relay is an electronic switch used to control the operation of a controlled voltage using power from an external control source. In other words, a solid state relay (SSR) is a device that utilizes an integrated circuit (IC) to switch electrical signals, or power, from one element of a circuit to another.The AQY221N2VW has a number of potential applications. Generally speaking, this type of relay is well-suited for applications that require a relatively low load current (<100mA) and that need a high input impedance (in excess of 100 kilohms). In addition, the AQY221N2VW can be used to provide high-speed switching, allowing it to be used in more rapidly changing systems or for pulse-width modulation control.The AQY221N2VW is particularly well suited for general purpose switching applications in the industrial, commercial, medical, home appliance and automotive industries. As an example, the relay could be used in various industrial process control systems, manufacturing automation systems, home appliances, and automation equipment controls. In automotive applications, the relay could be used for various electronic control systems, from motor speed control to fuel injection systems.In terms of its working principle, the AQY221N2VW works by using a TRIAC (Triode for Alternating Current) switching element. This TRIAC is an electronic device that has two switch states: off and on. When the input is switched on, the TRIAC is activated and allows the output current to flow. When the input is switched off, the TRIAC turns off and the output current stops flowing. The AQY221N2VW has a zero-crossing detector built into its architecture, which is used to detect the point where the input current crosses zero, allowing the TRIAC to fire at the exact point where current is zero for a more precise switching action.In summary, the AQY221N2VW is a solid state relay that can be used for a variety of switching applications in the industrial, commercial, medical, home appliance and automotive industries. Its operation is based on the TRIAC switching element combined with a zero-crossing detector, allowing for precise high-speed switching action.

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