LNK614DG
Compact AC/DC converters with constant voltage and current control
Manufacturer： power-integrations
series introduction
# Introduction to the LNK614DG Product Series
## 1. Overview
The LNK614DG is a remarkable product series that belongs to the family of highly integrated switch - mode power supply (SMPS) controllers. These devices are designed to simplify the design process of power supplies while offering high efficiency, reliability, and cost - effectiveness. They are widely used in a variety of applications, from consumer electronics to industrial equipment, due to their excellent performance characteristics.
## 2. Key Features
### 2.1 High Integration
- The LNK614DG integrates a power MOSFET, a controller, and protection features on a single chip. This high level of integration reduces the number of external components required in a power supply design. For example, compared to traditional discrete designs, it eliminates the need for separate MOSFET drivers, complex control circuits, and multiple protection chips. This not only saves board space but also simplifies the overall layout and reduces the bill of materials (BOM) cost.
- It also includes an oscillator, a feedback control circuit, and a startup circuit, all within the same package. This seamless integration ensures smooth and efficient operation of the power supply.
### 2.2 Energy Efficiency
- These devices are designed with advanced power management techniques to achieve high energy efficiency. They operate in a quasi - resonant (QR) mode, which reduces switching losses. In QR mode, the power MOSFET turns on at the zero - voltage crossing of the drain - source voltage, minimizing the power dissipated during the switching process.
- The LNK614DG also features a frequency - foldback mechanism. As the load decreases, the switching frequency is reduced, which further improves the efficiency at light loads. This makes it an ideal choice for applications where the load can vary significantly, such as battery chargers and standby power supplies.
### 2.3 Comprehensive Protection
- Over - voltage protection (OVP) is built - in to safeguard the power supply and the connected devices from excessive voltage. If the output voltage exceeds a predefined threshold, the LNK614DG will quickly shut down the power MOSFET to prevent damage.
- Over - current protection (OCP) is another important feature. It monitors the current flowing through the power MOSFET and limits it to a safe level. In case of a short - circuit or an over - load condition, the device will automatically reduce the output current to protect itself and the load.
- Thermal shutdown protection is also included. If the temperature of the device exceeds a certain limit, it will shut down to prevent overheating and potential damage. Once the temperature cools down, the device can automatically resume normal operation.
### 2.4 Wide Input Voltage Range
The LNK614DG can operate over a wide input voltage range, typically from 85VAC to 265VAC. This makes it suitable for use in different regions around the world, where the mains voltage can vary. It can also handle fluctuations in the input voltage without significant degradation in performance, ensuring stable power output.
## 3. Applications
### 3.1 Consumer Electronics
- In mobile phone chargers, the LNK614DG's high efficiency and small form factor make it an ideal choice. It can convert the AC mains voltage to the appropriate DC voltage required to charge the phone's battery quickly and safely.
- For LED lighting applications, such as LED bulbs and downlights, the device can provide a stable and efficient power supply. Its dimming capabilities and protection features ensure long - lasting and reliable operation of the LED lights.
### 3.2 Industrial Equipment
- In industrial control systems, the LNK614DG can be used to power various sensors, actuators, and control modules. Its wide input voltage range and robust protection features make it suitable for use in harsh
Images for reference
LNK60xDG
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