TOP245YN

Duty Cycle:	66.5%
Mounting Type:	Through Hole
Supplier Device Package:	TO-220-7C
Package / Case:	TO-220-7 (Formed Leads), 6 Leads
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Frequency Control
Fault Protection:	Current Limiting, Over Temperature, Over Voltage
Power (Watts):	85W
Frequency - Switching:	66kHz ~ 132kHz
Series:	TOPSwitch®-GX
Voltage - Supply (Vcc/Vdd):	--
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tube

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TOP245YN Application Field and Working PrinciplePower management integrated circuits (PMICs) are integrated circuits that are specifically designed to efficiently manage the power of an electronic system. PMICs are capable of powering an entire system or providing just up to the voltage level necessary to power a component component. PMICs come in many forms, with all sorts of features that can be tailored to a specific application.AC-DC converters are examples of PMICs that convert AC power, such as the power from your wall outlet, into DC power, which nearly all electronic circuits need. The TOP245YN is one such AC-DC converter, operating from 4.5 V to 40 V and capable of providing up to 15 W of power. It is designed for use in automotive, industrial and other harsh environments, featuring integrated thermal shutdown and short-circuit protection so it can safely and reliably operate in volatile power supplies. Due to its small, compact size, it is helpful for space-constrained applications.The TOP245YN works on the principle of a buck converter, which works by switching the power output on and off in a very fast manner. This is done by controlling an internal switch, and then “chopping” the incoming AC power into a different form that can now be regulated. A buck converter works by taking the AC voltage and chopping it into a DC voltage output. This voltage is then regulated or “throttled” so that it stays at the desired value, usually somewhere around 12 V.The TOP245YN is a non-synchronous buck converter, meaning that it is not synchronized to the incoming AC input. This makes it more efficient, since it does not require knowledge of the AC waveform in order to switch the internal switch accurately. The TOP245YN utilizes an internal high-side MOSFET transistor to control the switch, which helps to provide a higher level of efficiency in comparison to other PMICs.The TOP245YN also uses an integrated Faraday-Shielded opto-isolator, which helps to protect the device from damaging surges in power or voltage. This also helps to provide a longer lifespan to the integrated circuit. The device contains an internal voltage feedback control system, as well as thermal shut-down to protect it from overheating.Overall, the TOP245YN is a reliable, efficient, and cost-effective solution for many power management needs. With its high level of protection, it is well-suited for a variety of applications, including automotive, industrial, medical, and consumer electronics. Its ability to provide a constant DC output in spite of variable AC input makes it a desirable solution for many different applications.

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