Linear Power Supplies 

AC-DC Power Supplies

Powertronix offers AC to DC Linear Power Supplies in both regulated and unregulated configurations.

Unregulated power supplies are cost effective DC power sources in applications where moderate output voltage variations and ripples are acceptable.  Unlike the regulated configuration, unregulated power supplies do not provide constant output voltage to the load.  

When constructing unregulated linear power supplies, different rectifier circuit configurations can be used. The most common rectifier configurations are: 

Full-Wave Bridge – The most cost-effective configuration because the entire transformer secondary is used each half-cycle.

IAC = 1.8 x IDC

Full-Wave, Center-Tapped – This configuration is commonly used in high-current, low-voltage applications because there is only one voltage drop in the circuit. However, since only one secondary winding is used at a time, the transformer’s power rating must be about 30% greater than for a full-wave bridge transformer.

IAC = 1.4 x IDC

Full-Wave Center-Tap with Choke Input - Choke input filters are commonly used in high current applications because they reduce ripple and allowing better utilization of the transformer’s power capacity.

Where ω=2πf
IAC = 0.7 x IDC

Dual Complementary - When a positive and negative DC output of the same voltage is required, a dual complementary rectifier is the best choice. The secondary windings are bifilar-wound for precisely matched resistance, coupling, and capacitance.

IAC = 1.4 x IDC

Regulated power supplies provide a stable output voltage regardless of the amount of current applied to the load.