What is the difference between isolated and non isolated dc/dc converters?
Isolation describes the electrical separation between the input and output of a dc-dc converter. An isolated dc-dc converter uses a transformer to eliminate the dc path between its input and output. In contrast, a non-isolated dc-dc converter has a dc path between its input and output.
What is the duty cycle of a converter?
The duty cycle is the ratio of the turn-on time (TON) to the complete cycle length, the turn-off time (TOFF) plus on time, and defines a simple relationship between the input voltage and an output voltage. For a step-up (boost) converter, the duty cycle D = 1 – (input voltage/output voltage). Figure 1.
What do you need to know about isolated DC / DC converters?
Regulated isolated DC/DC converters provide a tight regulation over line, load, and temperature ranges, but require either an optocoupler or a digital isolator IC. Semi-regulated isolated DC/DC converters make a trade-off between the output voltage regulation and circuit complexity.
How much voltage regulation can be achieved in a DC to DC converter?
By proper design, roughly a ±5 to ±10 percent output voltage regulation could be achieved, depending on the load current range. A flyback converter can easily generate multiple outputs without any additional output filter inductor which is usually required by other DC/DC converter topologies.
What kind of isolation is used in RECOM DC converters?
Production processes ensure that the quality and thickness of epoxy and lid meet the minimum agency requirements for basic insulation at the stated system voltage. RECOM’s RP-xxxx series uses this type of construction to offer 5.2kV DC isolation test voltage rating in a compact SIP7 package (19.6 x 10.2 x 7mm).
How is a LDO regulator used in a DC converter?
A low-dropout (LDO) regulator is often used as the post regulator to provide low noise and low ripple power supply. Input voltage, load current, and ambient temperature all have an impact on the output voltage accuracy in an unregulated isolated DC/DC converter.