LNK3604D-TL

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The LNK3604D-TL is an offline switcher that typically functions as an AC/DC converter. It is oriented towards applications such as active 3-state transitional switching, providing cost-efficiency and energy savings. This device makes use of a zero-voltage and zero-current turn-on switch, thus eliminating surge currents that are associated with regular hard switching. Primary function of this device is to provide isolated converters, and thus find use in industries such as automotive, healthcare, and consumer electronics.

The typical application field of the LNK3604D-TL can range from low-power isolated converters (transformer isolated switching) for powering circuits that require high level of insulation, to a wide range of industrial AC/DC systems such as monitors, game systems, and printers. Additionally, this device may be used for mobile applications such as cameras, portable medical devices, car stereos and other home entertainment products. Due to its low power, the LNK3604D-TL is also utilized in power adapters, which usually employ an orphan switch topology.

The LNK3604D-TL functions by allowing the main switch to be turned on and off, thus enabling the control and regulation of an AC/DC converter in order to provide an output voltage that is independent of the input voltage. This device essentially works in a similar fashion as other offline switchers, andis essentially an improved version of traditional hard-switching switchers that often have high surge levels during start-up. The primary component within the LNK3604D-TL is the primary switch, typically an electrical power pass from the rectified and regulated AC voltage. Additionally, the device features a 300V primary MOSFET switch, which provides a low voltage drop, zero current turning-on switching and minimal power dissipation.

The device works by utilizing two different Secondary-Side (SS) controllers, which are either a 5-1•² off-time or 7-1•² off-time controller combined with a PWM dimming control. The SS controllers feature a phase-shift dimming system that reduces the EMI filter size and the secondary-side components. Additionally, the SS controllers feature a high resolution, fast transient offset compensation loop that maintains precise output voltage regulation and provides good line and load performance.

The LNK3604D-TL also contains a control integrated circuit (IC) along with an under-voltage lockout (UVLO) and primary-side dead time compensation that allows the device to operate with tight duty cycle control while reducing electromagnetic interference (EMI). The device also features a start-up circuit that contains an oscillator, current limit and on/off switch. The device also has a PWM-controlled latch for independent current limiting that is adjustable with the PWM duty cycle.

In summary, the LNK3604D-TL is an offline switcher typically used as an AC/DC converter to provide cost-efficiency and energy savings. This device features a 300V primary MOSFET switch and a high resolution, fast transient offset compensation loop that helps maintain precise output voltage regulation and provides good line and load performance. This device is applicable in industries such as automotive, healthcare, and consumer electronics for providing isolated converters, and can also be used for a variety of mobile applications.

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