Contents
How to improve bridge line rectification for SMPS?
Design of active bridge line rectification for SMPS Efficiency improvement with active bridge line rectification Figure 1 Standards and customized efficiency requirements for a redundant power supply 1.2fficiency improvement by reducing power loss on the bridge rectifier
What are the results of active bridge line rectification?
active bridge line rectification MOSFETs from being damaged by overvoltage and over-current in a lightning surge test to IEC-61000-4-5, and under abnormal test, like AC cycle drop-out. Efficiency test results and a reference schematic are provided to demonstrate active bridge line rectification performance.
When do you use the H bridge arrangement?
The H-bridge arrangement is generally used to reverse the polarity/direction of the motor, but can also be used to ‘brake’ the motor, where the motor comes to a sudden stop, as the motor’s terminals are shorted, or to let the motor ‘free run’ to a stop, as the motor is effectively disconnected from the circuit.
What kind of relay do you need for a H bridge?
One way to build an H-bridge is to use an array of relays from a relay board. A ” double pole double throw ” (DPDT) relay can generally achieve the same electrical functionality as an H-bridge (considering the usual function of the device).
What causes voltage spikes in a SMPS circuit?
The parasitic capacitance also contributes to voltage/current spikes in the SMPS circuit, but this does not dominate until you are working at kV levels. This particular voltage spike, due to parasitic inductance, occupies circuit loops in your SMPS layout, which can stress components to the point of failure.
What causes a PWM to fail in a SMPS?
A fast rising edge in the PWM signal with an ON current of a few amps can induce a spike of several volts. Over time, this stresses components and leads to failure of the SMPS.
What happens when you use a faster edge rate in SMPS?
If you use a faster edge rate, you will induce a larger transient current in your SMPS circuit. Even a relatively short trace (a few mm) on standard-thickness FR4 will have ~10 nH of parasitic inductance. A fast rising edge in the PWM signal with an ON current of a few amps can induce a spike of several volts.