78M6612SP-EVM-1 Maxim Integrated Products, 78M6612SP-EVM-1 Datasheet - Page 25

• Manufacturer Part Number: 78M6612SP-EVM-1
• Description: Power Management Modules & Development Tools 78M6612 Eval Kit Phase EV Board
• Manufacturer: Maxim Integrated Products

Specifications of 78M6612SP-EVM-1

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UM_6612_044
3.12 Calibration
The 78M6612 Split Phase firmware includes built in calibration routines. An external voltage source and
external current source (or load) is required. The firmware assumes an external 120VAC ± 0.5% is
present on each phase and a 1A ±0.5% load current is present on each phase. The calibration routine
adjusts a set of coefficients until the measured voltages and currents are within a 1% tolerance. These
default target values can be changed.
The following figure shows a split phase calibration test setup.
After turning on the relays, the voltage inputs are calibrated first and then the load currents are calibrated.
The voltage calibration and current calibration each take a few seconds to complete. The characters
following the prompt symbol “>” are the CLI command characters. A following carriage return initiates the
response.
Rev. 1.0
Host PC
USB
Figure 7: Split Phase Calibration Test Setup
Controller
USB
Switcher
12VDC
ACDC
78M6612 SP Eval Board
UART
3V3 Reg
10x DIOs
78M6612 Split Phase Evaluation Board User Manual
6612
I2C
Voltage
Voltage
Divider
Divider
Current
Shunt
Precision
Precision
Current
Voltage
Source
Load
Relay
Relay
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