AC-DC non-isolation is divided into two types: one is linear power supply , and the other is BUCK circuit. The PN8044/46 non-isolated AC-DC power supply chip buck circuit of Liwei Electronics agent uses a BUCK topology, which is commonly used in small appliances control board power supply and industrial control power supply. Its typical circuit specifications include 5V/0.5A, 12V/0.5A and 24V/0.5A, etc., which meet the requirements of the sixth-level energy efficiency.
PN8044/46 integrated PFM controller and 650V high avalanche capability intelligent power MOSFET are used for extremely streamlined small-power non-isolated switch power supplies with extremely simple peripheral components. The PN8044/PN8046 has a built-in 650V high-voltage start module to realize the system's fast start and ultra-low standby function. The chip provides complete intelligent protection functions, including overload protection , undervoltage protection, and overtemperature protection. In addition, the frequency down-modulation technology of PN8044/46 helps to improve EMI characteristics.
PN8044/46 Product features:
■ Built-in 650V high avalanche capability intelligent power MOSFET
■ Built-in high voltage start-up circuit
■ Optimized for 18V output non-isolated applications
■ PN8044 semi-closed steady-state output power 5.4W @230VAC
■ PN8046 semi-closed steady-state output power 9W @230VAC
■ Improved EMI down-modulation technology
■ Excellent load regulation rate and working efficiency
■ Comprehensive protection function
0■ Improved EMI down-modulation technology
■ Excellent load regulation rate and working efficiency
■ Comprehensive protection function
0■ Improved EMI down-modulation technology
■ Excellent load regulation rate and working efficiency
■ Comprehensive protection function
0 Overload protection (OLP)
Overtemperature protection (OTP)
Undervoltage protection (UVLO)
PN8044/46 Non-isolated AC-DC switching power supply chips have simple circuits, low BOM costs (very few peripheral components: no transformer, inductance , optocoupler), small power supply size, no noise, low heat generation, etc., and can pass reliability test , etc., and can pass 3C, UL, CE and other certifications. Liwei Electronics is widely used in non-isolated home appliances and industrial products.
