PT7716C

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DC-DC converters are power conversion components used to convert direct current from one voltage to another.The PT7716C is a digital off-line switcher that uses a current-mode PWM controller. It produces regulated outputs, protect against overloads and shorts, and provide continuous short-circuit protection.Applications include LED lighting, security system, and general industrial use.

PT7716C Overview

The PT7716C is developed by Power Trends, Inc. It is a constant switching frequency digital off-line switcher with high efficiency, low standby power consumption, and low external component count. The PT7716C switches between two fixed output currents, which can be used for lighting applications such as LED lighting or for powering other electrical devices. The current mode control circuit ensures better load regulation and fast transient response, while the over-current protection (OCP) circuit prevents damage to the components due to overloads and shorts.

PT7716C Working Principle

The PT7716C works as follows: First, the input voltage is sensed by an opto-coupler and compared to a reference voltage. If the voltage is higher than the reference voltage, the opto-coupler will turn on the power switch. Then the power switch releases current into the primary side of the transformer to generate the required output voltage. The current mode control loop ensures that the output current is always stabilised and the constant switching frequency generates a sinusoidal waveform. The OCP circuit monitors the output and if it detects an overload or short, the power switch will be disabled to prevent damage to the components.

PT7716C Application Field

The PT7716C can be used in a wide range of applications including LED lighting, security systems, and general industrial use. In LED lighting, the PT7716C can provide high efficiency and low standby power consumption, while in security systems, the OCP circuit can protect the system from overloads or shorts. The transformer isolation reduces electromagnetic interference (EMI) and the wide input voltage range ensures flexible installation.

Conclusion

The PT7716C is a digital off-line switcher that provides reliable and efficient power conversion for LED lighting, security system and other general industrial use. Its current-mode PWM controller ensures better load regulation and fast transient response, while the OCP circuit provides continuous short-circuit protection. In addition, the wide input voltage range and transformer isolation make it suitable for a variety of applications.

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