LNK364DG

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The LNK364DG Application Field and Working Principle relates to the PMIC - AC DC converters and offline switchers family. The LNK364DG is a Flyback/Buck/Boost voltage regulator with integrated MOSFET drivers. It is a highly integrated power management IC that includes both primary and secondary side controllers for AC/DC single-stage or double-stage offline applications. It is ideal for non-isolated home appliance power supplies, including power conversion, PoE, solar, LED driver, and marine applications. This IC has a low standby power loss of 2mW in both active and standby states, an operating efficiency of up to 90%, and a high primary-side regulation accuracy of ±3%.

The LNK364DG uses its primary-side control scheme, GD+TM technology, to regulate the output voltage in the absence of any secondary-side feedback. The GD+TM technology utilizes optimized device selection, a few external components and software-based closed-loop control, to provide good performance and power efficiency. The device can also be used with optional external-VCC synchronization to control the output voltage during light-load regulation. This IC also has power-saving features, including an Active Burst mode, multiple Protection features, and Power Limitation.

The LNK364DG includes a ramp generator and an adaptive oscillator for fast, efficient and easy system synchronization. The start-up time is improved and EMI is reduced due to the transition from audible noise to low frequency ripple. The LNK364DG also includes separate pins for control, logic and communications protocols, allowing flexibility and reducing external components. The device is also compatible with various interfacing and output current sensing topologies.

In terms of safety, the LNK364DG has Over Voltage Protection (OVP), Over Current Protection (OCP), Over Temperature Protection (OTP), Frequency and Current Limit Protection (FCL), and Lock-Out Protection (LOP). The device also has a UVLO feature to protect the primary- and secondary-side MOSFETs during start-up and shutdown. The LNK364DG is also capable of working in temperatures ranging from -20°C to +105°C.

In summary, the LNK364DG Application Field and Working Principle relates to the PMIC - AC DC converters and offline switchers family, providing an integrated power management IC for non-isolated home appliance power supplies. The device operates with low standby power loss, high operating efficiency and with primary-side regulation accuracy of ±3%. The device includes protection features, as well as power-saving features such as Active Burst mode. The LNK364DG is compatible with various interfacing and output current sensing topologies, and is capable of operation in temperatures ranging from -20°C to +105°C.

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