Push-pull switching power supply advantages
1. The push-pull switching power supply has a high transient response speed of output current and excellent voltage output characteristics. Push pull switching power supply is the most voltage efficient switching power supply among all switching power supplies.
Due to the alternating operation of the two control switches in the push-pull switching power supply, the output voltage waveform is very symmetrical, and the switching power supply provides power output to the load throughout the entire cycle. Therefore, its output current transient response speed is high and the voltage output characteristics are good. Push pull switching power supply is the most voltage efficient switching power supply among all switching power supplies. It can still maintain a large output power even when the input voltage is very low, so push-pull switching power supplies are widely used in low input voltage DC/AC inverters and active DC/DC converter circuits.
2. Push pull switching power supply is a switching power supply with excellent output voltage characteristics.
After bridge rectification or full wave rectification, the output voltage ripple coefficient and current ripple coefficient of push-pull switching power supply are very small. Therefore, a very small value of energy storage filter capacitor or energy storage filter inductor is required to obtain an output voltage with very small voltage ripple and current ripple. Therefore, push-pull switching power supply is a switching power supply with excellent output voltage characteristics.
3. The leakage inductance and copper resistance loss of push-pull switching power supply transformers are much smaller than those of unipolar magnetized pole transformers, and the working efficiency of switching power supplies is high.
The transformer of push-pull switching power supply belongs to bipolar magnetization pole, and the magnetic induction transformation range is more than twice that of unipolar magnetization pole. Moreover, the transformer core does not require an air gap. Therefore, the magnetic permeability of the transformer core of push-pull switching power supply is many times higher than that of the transformer core of forward or reverse switching power supply with unipolar magnetization pole. As a result, the number of turns of the primary and secondary coils of push-pull switching power supply transformer can be more than twice that of the primary and secondary coils of unipolar magnetization pole transformer. So, the leakage inductance and copper resistance loss of push-pull switching power supply transformers are much smaller than those of unipolar magnetized pole transformers, so the working efficiency of switching power supplies is higher.
4. The driving circuit of push-pull switching power supply is simple.
The two switching devices of a push-pull switching power supply have a common ground terminal, which makes the driving circuit much simpler compared to half bridge or full bridge switching power supplies.
5. Push pull switching power supplies do not have the possibility of two control switches colluding simultaneously like half bridge and full bridge switching power supplies.
