Maxim-integrated 78M6610+PSU Hardware Design Guidelines Bedienungsanleitung PDF herunterladen (Seite 7)

AN_6610_107 78M6610+PSU Hardware Design Guidelines

Rev. 0 7

3 Alternate Configuration

Voltage and current sensors can alternatively be located right at the AC inlet in front of the EMI filters if

using a current transformer (CT). In this configuration, the measurement device is powered using the

same auxiliary winding from the standby channel, but with a high impedance path between

78M6610+PSU circuitry and AC mains.

I Load

I Secondary

AIN

AIP

750

3P3A

750

100n

1000p

RBurden

78M6610+PSU

10K

AVP

AVN

750

100n

1000p

750

INLET

LOAD

1M1M

3P3

Neutral

(or Line)

Line

(or Neutral)

Figure 3: Pseudo-Isolated Configuration Example

It is highly recommended to use high-tolerance resistors in the voltage divider to minimize measurement

error caused by divider ratio mis-matching.

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Maxim-integrated 78M6610+PSU Hardware Design Guidelines Bedienungsanleitung Seite 7