VN1160C-E

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Power conversion is one of the essential components in any modern embedded system, and the VN1160C-E IC is a prime example of this. This integrated circuit (IC) is a fixed frequency, current-mode, primary-side regulated off-line switcher from Vincotech. The VN1160C-E is a member of the VN1160C series, ideal for use in low to medium power applications such as in lighting systems, environmental control systems, solar energy converters and general industrial applications.

VN1160C-E Features

• Low Stand-By Power
• Wide Output Voltage Range
• Flexible Switching Frequency Range
• Ultra-Low Start-Up Current
• Low Required Average On-Time
• Fixed Switching Frequency over Temperature
• OVP, OTP and UVLO Protection
• Equipped with a 5V Linear Regulator

VN1160C-E Application Fields

The VN1160C-E is ideal for use in low to medium power applications, thanks to its low stand-by power, wide output voltage range, and flexible switching frequency range. It is perfect for use in lighting systems, environmental control systems, solar energy converters and general industrial applications. It can provide reliable, cost-effective and high efficiency solutions for these applications.

VN1160C-E Working Principle

The VN1160C-E is a fixed frequency, current-mode, primary-side regulated offline switcher from Vincotech. It is powered by a full-bridge rectifier, which supplies the primary-side ICs with current. The internal power MOSFET switches the primary side current in an on/off pattern according to the required output voltage. The output voltage is set using an external resistor (with a proper value of resistance) which is connected between the COMP pin and ground in order to create an inner-loop control system. The output-voltage regulation and feedback is achieved by monitoring the feedback voltage at the FB pin and then adjusts the duty-cycle of the internal switch accordingly, using a current sensing comparator.

This inner-loop control system works by creating a voltage drop across a particular, externally connected, resistor (with a proper value of resistance). When the output voltage drops, the voltage drop across the resistor increases which causes an increase in the input current and then the duty cycle of the internal power MOSFET. This increases the amount of time where the power MOSFET is present in the off-state, which then reduces the output voltage. Conversely, when the output voltage rises, the input current decreases and the duty cycle of the internal switch decreases and the output voltage rises again. By constantly monitoring the output voltage and modifying the duty cycle of the internal switch, the VN1160C-E is able to maintain a precise output voltage.

Conclusion

The VN1160C-E is a fixed frequency, current-mode, primary-side regulated off-line switcher from Vincotech. This integrated circuit is perfect for use in low to medium power applications, thanks to its low stand-by power, wide output voltage range, flexible switching frequency range, and low required average on-time. It is equipped with a 5V linear regulator and offers several protection features such as OVP, OTP and UVLO. This enables it to provide reliable, cost-effective and high efficiency solutions for various applications.

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