LNK626DG-TL Integrated Circuits (ICs)

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LNK626DG-TL is an integrated PWM controller from Texas Instruments, designed for offline AC/DC converters and switching power supplies. It features excellent performance with a high efficiency and integrated functions (like Burst mode and current mode PWM). It also integrates many protective functions (IPM/OCP, short circuit protection, over voltage protection and more) to support isolated and non-isolated designs.

LNK626DG-TL is a PMIC (power management integrated circuit) used in AC/DC converters and offline switchers. It is a highly integrated solution with embedded protections, current mode pulse-width modulation (PWM) control and many system cost saving features. The device provides a cost-effective solution for non-isolated AC to DC flyback and buck-boost applications, such as those found in lighting, telecommunications, and consumer electronics applications.

The working principle of the LNK626DG-TL is Pulse-Width Modulation (PWM). It is a process of controlling the average power delivered to a load by modifying the duty cycle of an on/off switch. In practice, a Pulse Width Modulated (PWM) converter switches the output voltage at a high frequency (typically >100 kHz), and its duty cycle is adjusted so that the average output voltage matches the desired level. This type of control has many advantages such as high efficiency, low switching noise, and fast response.

The LNK626DG-TL features an 8-pin compact design. It offers precision control for flyback and buck-boost converters with an adjustable current mode control and an adjustable low-side current limit. The device also incorporates integrated protection features like over-current protection (OCP), over-voltage protection (OVP) and short-circuit protection (SCP). It also has an auto-restart mode with programmable timeout for intermittent overloads, ensuring consistent output current and voltage during extreme conditions.

The integrated features in the LNK626DG-TL make it an ideal solution for cost effective and efficient power control applications. It offers the use the flexibility of programmable parameters, the stability of auto-restart protection and the accuracy of current mode control. It is a versatile and cost-effective PMIC suitable for a range of DC to AC designs including flyback and buck-boost non-isolated converters.

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