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ezLINX™ iCoupler® Isolated Interface Development Platform Homepage

ezLINX™ Power Supply Implementation

Power Input

An AC/DC desktop power supply is used to supply 7.5V input to the barrel connector J1 on the ezLINX hardware. This supply connects through a protection circuit as shown in Figure 1 below to the UNREG_IN node of the circuit.

Figure 1.

3.3V Power Supply

The ADP1864 Constant Frequency Current-Mode Step-Down DC-to-DC Controller is used with an external P-Channel Mosfet to generate the regulated 3.3V Power Supply for the ezLINX hardware. The circuit implementation of the 3.3V power supply is shown in below in Figure 2.

Figure 2.

1.2V, 2.5V and 5V Power Supplies

A P-Channel mosfet is used to regulate the 3.3V input to 1.2V, See Figure 3 below.

Figure 3.

The ADP1706 Linear regulator is used to regulate the 3.3V input to 2.5V, See Figure 4 below.

Figure 4.

The ADP3335 low dropout regulator is used to regulate the UNREG_IN input to 5V, See Figure 5 below.

Figure 5.

resources/eval/ezlinx/power.1337091823.txt.gz · Last modified: 15 May 2012 16:23 by Andy Rose

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