Switch-mode power conversion design with linear final regulation

28th November 2019
Alex Lynn

Saelig Company has announced the introduction of the AIM-TTi MX100Q Series Power Supplies, versatile four-output laboratory power sources which use mixed mode regulation to provide up to 210W of power, shared by up to four outputs, in one compact case.

Mixed-mode regulation combines switch-mode architecture with linear final stage regulation to give performance characteristics resembling a totally linear design but at greatly reduced weight. Each output can provide zero to 35V at zero to three amps, with output combination abilities that extend output voltages up to 70V and currents up to six amps.

The MX100Q series provides fine precision output adjustment with a resolution of 1mV and 0.1mA. All relevant information is displayed on a large backlit graphic LCD, with control is via soft keys, a numeric keypad, and a spin wheel.

More than 50 standard range output combinations are available. Advanced features include 50 memorised settings for each output plus 50 further settings for all four outputs together. Multi-On and Multi-Off keys supplement the individual output On/Off keys. Keys can be programmed to turn the outputs on or off in a timed sequence. The front panel can also be locked to prevent accidental changes to settings.

The MX100Q power supply is housed in a ¾ rack width, 3U high case with front input ventilation. An intelligent fan design minimises cooling noise. The MX100QP version also adds USB, RS232, GPIB (optional) and LXI compliant LAN interfaces, plus duplicate rear-mounted power and sense terminals.

Key features:

  • Four independent and full performance outputs.
  • Simultaneous display of meters and settings for all outputs.
  • Instant access to voltage/current setting for any output.
  • Multiple ranges on each output for wider voltage/current choice.
  • Instant individual on/off control plus sequenceable multi on/off.
  • Up to 250 memory settings for individual or multiple outputs.

Typical applications for the MX100Q range include: medium to high power bench-top applications requiring multiple outputs; situations where voltage and current requirements may vary widely between projects; powering rail-sensitive circuits using on/off sequencing; repetitive testing applications requiring memorised multi-output settings memories; high-density system applications requiring multiple outputs with limited rack space; remote power control applications.

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