The VIPER15LN is a highly integrated off-line converter IC component specifically designed to generate a stable low voltage output from the input voltage. Here is an overview and key features of the VIPER15LN:
1. Overview:
- The VIPER15LN is a fixed-frequency (60 kHz) PWM controller with an integrated power MOSFET.
- It operates in a quasi-resonant mode with valley skipping for improved efficiency.
- This IC component is targeted for medium power off-line applications, including home appliances, lighting systems, and smart meters.
2. Key Features:
a. Integrated Power MOSFET: The VIPER15LN incorporates a high voltage (800 V) power MOSFET, which eliminates the need for an external power switch and simplifies the design. This integration also reduces board space requirements.
b. Constant Power Output: It features a constant power control scheme that enables stable voltage regulation even at low output current levels. This ensures consistent performance across a wide range of load conditions.
c. Quasi-Resonant (QR) Operation: The VIPER15LN utilizes QR operation, which allows the IC to adjust its switching frequency dynamically depending on the load requirements. This reduces power losses and electromagnetic interference (EMI), enhancing overall efficiency.
d. Valley Skipping: With the valley skipping technique, the IC can skip a number of non-useful switching cycles to ensure optimal performance. This contributes to higher efficiency and lowers power dissipation.
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