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Phone as a key (PaaK)

Products and reference designs
Block diagram

Phone as a key (PaaK)

Block diagram

Overview

Our integrated circuits and reference designs for phone-as-a-key (PaaK) systems help you develop accurate localization techniques using Bluetooth® Low Energy to enable digital key capabilities on a smart phone for passive entry and passive start functionality.

Design requirements

PaaK designs require:

  • Optimized power and range.
  • Secure relay attack prevention using Bluetooth Low Energy.
  • Achievement of accurate localization using Bluetooth Low Energy while minimizing number of nodes.

Block diagram

Find products and reference designs for your system.

PaaK BLE satellite module

PaaK backup keyfob

Paak module

PaaK BLE satellite module

Discrete implementation or system basis chip (SBC) Discrete implementation or system basis chip (SBC) Car battery Car battery RF interface RF interface BLE SoC BLE SoC 1 - 2 2.4GHz antennas 1 - 2 2.4GHz antennas Power supply Power supply LDO LDO Reverse battery protection Reverse battery protection Communication interface Communication interface CAN/LIN CAN/LIN CAN/LIN ESD CAN/LIN ESD BLE satellite modules BLE satellite modules Phone as a key Phone as a key Back-up key Back-up key Outside of the vehicle Outside of the vehicle Paak module Paak module Phone as a key module (may be integrated in the BCM) Phone as a key module(may be integrated in the BCM) Rest of the vehicle Rest of the vehicle CAN/LIN CAN/LIN Body control module (BCM) Body control module (BCM)

Technical documentation

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Type Title Date
White paper Simplify CAN bus implementations with chokeless transceivers 31 Mar 2016
More literature Fundamentals of designing with LDOs in auto battery direct connect applications 28 Feb 2017
Application note Implementing a Pairwise Key Mechanism for the 6LoWPAN Mesh TI Designs 25 Sep 2018
Technical article Smart Wi-Fi® locks will soon open many doors PDF | HTML 21 Aug 2023
Technical article Bluetooth® Low Energy shifts gears for car access PDF | HTML 20 Sep 2023
Technical article How PEPS technology is opening the doors to the evolution of car access systems PDF | HTML 14 Sep 2023
Application note Measuring CC13xx and CC26xx current consumption (Rev. D) PDF | HTML 11 May 2022
Application note 2.4-GHz Inverted F Antenna (Rev. D) 10 May 2022
Application note Bluetooth® Angle of Arrival (AoA) Antenna Design (Rev. A) PDF | HTML 07 Jun 2023
Technical article Exploring connectivity trends for Bluetooth® Low Energy in the car PDF | HTML 05 Sep 2023
Application note Designing High Performance, Low-EMI, Automotive Power Supplies 02 Oct 2017

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