Testing the board

AN2864

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Doc ID 15282 Rev 1

Figure 17.

DC power supplies [2], the power supplies are divided into two categories: low voltage

power supplies and standard power supplies according to the nameplate output voltage and

current. In order to be considered a low voltage power supply, an external power supply

must have a nameplate output voltage lower than 6 V and a nameplate output current higher

than or equal to 550 mA.

The tables below report the EPA energy efficiency criteria for AC-DC power supplies in

active mode for standard and low voltage models.

Table 10.

Energy efficiency criteria for standard models

Nameplate output power

Minimum average efficiency in active mode

(expressed as a decimal)

0 to

≤ 1 watt

≥ 0.48*Pno+0.140

> 1 to

≤ 49 watts

> 49 watts

≥ 0.870

Table 11.

Energy efficiency criteria for low voltage models

Nameplate output power

Minimum average efficiency in active mode

(expressed as a decimal)

0 to

≤ 1 W

≥ 0.497 *P

> 1 to

≤ 49 W

≥ [0.075 * In (P

> 49 W

≥ 0.860