MKM34
NXP
Freescale introduced the MKM34 series of microcontrollers for the single-phase and three-phase metering markets.
Application NoteNxp
EMI EMC Considerations for Energy Meters
Guidelines for designing robust energy meters using NXP MKM34 MCUs, focusing on EMI/EMC compliance and immunity to electrostatic discharge and tampering.
Overview
This application note provides design considerations for developing energy meters that comply with international IEC metering standards for electromagnetic compatibility (EMC). It highlights the NXP MKM34 series of microcontrollers, optimized for single-phase and three-phase metering with high immunity to electrostatic discharge (ESD) and high-frequency noise. The document covers specific type-tests such as impulse/surge voltage (IEC 61000-4-5), fast transient bursts (IEC 61000-4-4), and ESD immunity up to 35 kV to prevent tampering. It also details common causes of system failure—including mutual inductance, mutual capacitance, and antenna effects—and offers system-level design techniques such as enclosure sealing and wiring harness shielding to ensure robust operation in noisy environments.
Use Cases
- Single-phase and three-phase energy meter design
- EMC/EMI compliance for utility metering applications
- Hardening electronic systems against high-voltage ESD tampering
- Implementing IEC 61000-4 series standards in power measurement devices
Topics
NXP MKM34
energy meter
EMI
EMC
IEC 61000-4-2
IEC 61000-4-4
IEC 61000-4-5
ESD immunity
tampering
metering system design
Referenced Parts
| MKM34 | NXP | Freescale introduced the MKM34 series of microcontrollers for the single-phase and three-phase metering markets. |