And the main difference between series TSR1 and TMA? TSR is a so called POL (point of load, non-isolated) regulator, thus it works as “almost lossless load” (buck converter) regulating output power similarly like classic regulators (7805, 7812), only naturally with a substantially higher efficiency. Similarly excellent is also an output voltage stability at a load variation ( typ. 0,4% / 10-100% load). Series TSRxx has the same max. output current for all output voltages, i.e. for example 5V/1A or 12V/1A. In many applications it can be beneficial that TSR operates with up to 36V input voltage.
On the other hand, series TMA is an isolation DC-DC module with an output transformer operating at high frequency (tens to hundreds of kHz). Advantage of the TMA series is a complete galvanic isolation of an output voltage (so called floating voltage) and that´s why it´s suitable even for power supplying of various measuring probes, AD converters and other devices requiring isolated power supply or elimination of ground loops. Despite a significant advantage in a form of an isolated output this type of DC-DC modules has somewhat worse output voltage stability at a load change (max +-10%/20-100% záťaž). Max. output power is constant for a given series (TMA-1W, TMR-2, TEN3-3W, ...) i.e. versions with a higher output voltage provide a lower current.
The most comprehensive overview of available DC-DC and AC-DC modules will provide you the short-form Traco catalogue and datasheets at particular types.
replacement of classic 78xx regulators in a TO220 package
compact solution including inductor and capacitors (no external components are necessary)
operating temperature range is usually -40°C to +85°C
wide portfolio for various applications
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Date of publishing 07.05.2014. When you issue article on your website, please give its source: https://www.soselectronic.com/articles/tracopower/tracopower-traco-tsr-tma-when-every-watt-is-precious-1523