MAXQ3181-RAN+ datasheet(37/84 Pages) MAXIM

37 / 84 page

Low-Power, Active Energy, Polyphase AFE

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Overvoltage Level (OVLVL) (0x046)

This register specifies the fraction of full-scale voltage that is declared to be an overvoltage condition. When X.VRMS

exceeds this level for one DSP cycle, the OVF flag in the X.FLAGS register is set. If the OVM flag is set in the

X.MASK register, setting the OVF flag will cause the interrupt bit OV to be set in the IRQ_FLAG register. If the inter-

rupt is enabled, the interrupt pin is driven active. Full scale is represented by 0x10000. The maximum value for this

Undervoltage Level (UVLVL) (0x048)

This register specifies the fraction of full-scale voltage below which an undervoltage condition is declared. When

X.VRMS falls below this level for one DSP cycle, the UVF flag in the X.FLAGS register is set. If the UVM flag is set in

the X.MASK register, setting the UVF flag will cause the interrupt bit UV to be set in the IRQ_FLAG register. If the

interrupt is enabled, the interrupt pin is driven active. Full scale is represented by 0x10000. The maximum value for

this register is 0xFFFF.

No-Load Level (NOLOAD) (0x04A)

This register specifies the fraction of full-scale current below which a no-load condition is declared. When X.IRMS

falls below this level, the MAXQ3181 no longer accumulates power for phase X. Full scale is represented by

0x10000. The maximum value for this register is 0xFFFF.

Bit:

Name:

Overvoltage Level High Byte

Reset:

0xFF

Bit:

Name:

Overvoltage Level Low Byte

Reset:

0xFF

Bit:

Name:

Undervoltage Level High Byte

Reset:

0x00

Bit:

Name:

Undervoltage Level Low Byte

Reset:

0x00

Bit:

Name:

No-Load Level High Byte

Reset:

0x00

Bit:

Name:

No-Load Level Low Byte

Reset:

0x03

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