|
QUAD SERIES- DC/DC, AC/DC Multi-Output Converters General Description
The QUAD series of Power Supplies are configurable "standard" products for severe environmental applications, providing up to 4 isolated user-specified outputs to a maximum power of 180 Watts(160 watts for AC variants). AC and DC input voltage versions are available. Input converters include filtering to reduce EMI and to suppress input transients. Each of the 4 outputs is configured and manufactured to customer requirements. Output voltages from 3 to 120 volts DC can be specified to a maximum of either 48 watts or 5 amps per output. Outputs are isolated and can be connected externally in series or parallel to provide +/- outputs.The units are packaged in a machined aluminium casing with a chromate coating or painted finish - the enclosure optimises thermal conduction and allows for easy mounting, via the base or side mounted "wedgelock" fittings for rack application. Download full Data Sheet in pdf format or Contact Us for more information Design Considerations Where possible COTS / plastic encapsulated components will be utilised to reduce cost, however Military applications which require screened high reliability devices can be defined within the same mechanical package Two different design topologies are used for the QUAD range. Low input voltage units use a conventional 100KHz push-pull forward converter whilst the high input voltage units feature a half bridge converter. Both designs achieve good cross regulation via the transformer-connected feedback circuit from output 1. The current limit of the 4 outputs is individually set to the correct level for the user's specified voltage/current: second order filtering stages are used to minimise ripple/noise at each ouput. An opto-isolated "POWER GOOD" signal is provided to indicate the status of the power supply, this open collector TTL compatible signal is triggered if the main output is driven low by a fault condition occurring on any output. A TTL compatible "INHIBIT" pin is also provided to allow remote operation of the power supply. In the inhibited state the power dissipation is 8 watts.
|
