1. Voltage conversion: Alternating current (AC) of different voltage levels, such as 220V or 110V AC for common household use, can be converted into one or more low-voltage direct current (DC) required by electronic devices, such as 5V, 12V, 24V DC, etc.
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2. Safe Isolation: Through the use of isolation transformers, AC-DC power modules can provide safe isolation to ensure that users do not suffer from electric shocks when touching the device, and to reduce interference and noise between electrical devices.
3. Power Factor Correction (PFC): High-end AC-DC power modules include power factor correction to optimize the waveform of the input current, reduce THD, improve energy efficiency, and comply with international energy efficiency standards.
4. Filtering: AC-DC power modules typically contain filtering circuits to remove stray voltage or current generated during the rectification process, providing a smooth DC power output.
5. Voltage regulator: These modules also contain a voltage regulator circuit to ensure that the output DC voltage is stable and not affected by input voltage fluctuations or load variations.
6. Protection: Including over-voltage protection, over-current protection, overheat protection, and short-circuit protection, AC-DC power modules protect electronic devices from power-related problems.
AC-DC power modules are widely used in a variety of devices and systems, such as computers, telecommunication equipment, home appliances, industrial control systems, and medical equipment, due to their high efficiency, convenience, and integration.