The Pulse Electronics division of YAGEO has introduced the PGG6457NL series of space-saving isolation transformers for low-voltage power conversion circuits. The new family also includes the PMG6457NL transformers for automotive applications, which have ITAF approval.
The surface-mount transformer’s compact dimensions, just 15.6 mm x 16.5 mm x 7.2 mm, are attributable to the Pulse innovative sidecar packaging design. Despite its small size, this transformer provides 13 mm of creepage between pins. The isolation rating between the windings is 4.2 kVrms, and it also provides reinforced safety insulation.
The PGG6457NL and PMG6457NL are intended for operation in a fixed duty-cycle push-pull topology, as part of a low-cost solution for supplying up to 2.5 W from a low-voltage source. A typical application is an isolated RS-485 driver circuit. The transformer is compatible with a very wide range of power controllers, giving the designer flexibility in component selection.
For a fixed 50% duty cycle mode of operation, the output voltage is simply determined by the input voltage and turns ratio. The transformers are available with various turns ratios to support a variety of output voltages.
