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Application NoteNxp

AN14554: KW47 Bluetooth Low Energy Power Consumption Analysis

Power consumption analysis for NXP Kinetis KW47 automotive wireless MCUs, featuring low-power optimization steps and measurement procedures for Bluetooth LE v6.x applications.

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Overview

This application note provides a comprehensive power consumption analysis of the Kinetis KW47 automotive wireless MCU using the KW47-EVK board and KW47-001-M10 module. It details the hardware architecture, which utilizes dual Arm Cortex-M33 cores—one for the main power domain and one for the radio narrowband unit (NBU). The document describes various operational modes including deep-sleep, power-down, and deep power-down, alongside specific configuration steps to achieve optimal low-power profiles for Bluetooth LE v6.x. It includes technical breakdowns of advertising and connection events, current measurement setups, and timing sequences for RX/TX operations to help developers extend battery life in wireless designs.

Use Cases

  • Automotive digital key and smart FOB systems
  • Battery-operated IoT sensor nodes
  • Industrial wireless communication
  • Smartphone-to-embedded bridging
  • Ultra-low power wireless firmware updates

Topics

NXP
KW47
Kinetis
Bluetooth Low Energy
BLE 6.x
Power Consumption
Automotive MCU
Cortex-M33
KW47-EVK
Low-power optimization
Current measurement
Wireless MCU

Referenced Parts

KW47-001-M10

NXP Semiconductors

This section describes the steps to perform current-measurements on the KW47-EVK board, which includes the KW47-001-M10 module.

KW47

NXP Semiconductors

The Kinetis KW47 is a radio wireless MCU that supports the Bluetooth LE v6.x protocol.