OM13005,598 NXP Semiconductors, OM13005,598 Datasheet - Page 193

• Manufacturer Part Number: OM13005,598
• Description: BOARD EVAL EM773 METER US PLUG
• Manufacturer: NXP Semiconductors
• Type: Other Power Managementr

Specifications of OM13005,598

• Design Resources: Plug Meter Schematics, Gerber Files USB Dongle Schematics, Gerber Files
• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: EM773FHN33,551
• Interface Type: USB
• Maximum Operating Temperature: + 150 C
• Operating Supply Voltage: 1.8 V to 3.6 V
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: EM773, OL2381
• Other names: 568-6680

NXP Semiconductors
UM10415
User manual
16.6.1.3 Current measurement input range I2pp
16.6.1.4 Phase error correction angle DeltaPhi1
16.6.1.5 Phase error correction angle DeltaPhi2
The parameter I2pp for the I_LOWGAIN input depends on the transfer of the analog input
circuit in front of the Metrology Engine and it sets the peak-to-peak range for the second
current channel (in Ampere). The input circuit for this channel should be designed in such
a way that this range is approximately 16 * I1pp for an optimized accuracy curve.
Example: For a two current-channel 16 A meter this range will cover the range from 1A to
16 A and the corresponding value for I1pp will be at least 2√2 * 16 = 45.3 A In practice this
value needs to be larger, because margins for component tolerances need to be
accounted for in the input circuit design.
The transfer of the analog input circuit in front of the Metrology Engine must guarantee
that the signal at the I_LOWGAIN input of the Energy Measurement IC is between V
and V
Remark: If there is no second current measurement channel present, this value must be
set to zero.
Due to component differences, a phase error can occur between the VOLTAGE and
I_HIGHGAIN channels. This error needs to be corrected for accurate measurements.
The parameter DeltaPhi1 contains the correction angle (in radian) to compensate a phase
error between the VOLTAGE channel and the I_HIGHGAIN current channel.
Due to component differences, a phase error can occur between the VOLTAGE and
I_LOWGAIN channels (if this channel is used). This error needs to be corrected for
accurate measurements.
The parameter DeltaPhi2 contains the correction angle (in radian) to compensate a phase
error between the VOLTAGE channel and the I_LOWGAIN current channel.
If there is no second current measurement channel present, this value can be set to zero.
DD
.
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 10 September 2010
Chapter 16: EM773 Metrology engine
UM10415
© NXP B.V. 2010. All rights reserved.
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