App Notes

Figure 1: Recommended Connection Setup for PCB-mountable BP Series Power Supply with Mini-IEC Input Connector

Figure 2: Measured conducted emissions for a 10 W, 3.3 V three-pin IEC input power supply  (BP3)

Figure 3: Measured conducted emissions for a two-pin IEC input power supply (BP2)

Mounting and Emissions Considerations (BP Series)

Bear Power Supplies BP Series Power Supplies are available in three configurations:

  • PCB-mountable with mini-IEC input connectors
  • PCB-mountable industry standard packages with 3-pin input
  • Chassis-mountable

Figure 1 shows the recommended connection setup for PCB-mountable BP Series power supplies with mini-IEC input connectors.  Using this connection scheme, the BP Series power supply supply measures well below the maximum limits for conducted emissions.

Figure 2 shows measured conducted emissions for the two-pin IEC input power supply (BP2).

Figure 3 shows measured conducted emissions for the three-pin IEC input power supply (BP3).

Similar results can be achieved with the industry standard package (BP1) and the chassis-mountable units (BP4, BP5 and BP6).  We recommend that the earth ground wire be tied to one of the secondary outputs.

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