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胎壓監測系統(TPMS)

胎壓監測系統(TPMS)是用於監測汽車輪胎內氣壓的電子系統。它包括多個無線電發射器,安裝於輪胎空腔內的感測器模組,以及安裝於底盤的無線電接收器。TPMS已被授權在美國、歐洲和韓國使用。同時,日本和中國正在審查TPMS規範以獲得所有汽車應用的授權。因此,TPMS市場有望在不久的將來不斷擴大。

近來,TPMS接收器功能正集成於汽車中較為普遍的遙控鑰匙(RKE)接收器。所以,TPMS接收器必須安裝於車輛底盤的限制空間內,這樣不論車輛型號和尺寸,都可以從任何方向穩定地接收無線電信號。由於現在的汽車越來越多地採用電子控制系統(比如用於電動汽車),所以會有許多電子噪音源。因此,具有卓越抗干擾性能的射頻IC顯得非常有用。

This figure provides an outline of a tire pressure monitoring system (TPMS) and a remote keyless entry (RKE) system.

TPMS 系統方塊圖

This is the block diagram of a TPMS system.

建議產品

RF-Devices
Part Number Functions Availability Frequency(Hz) FSK ASK Package Operating Voltage
TX RX Local RF IF
TC32306FTG VCO
+PLL
315 M to 915 M 230 k/280 k
(built in)
QFN36 2.0 to 5.5 V

Note: This transceiver IC can also be used as a receive-only IC.

車用微控制器
Part Number ROM RAM Remarks Package Operating Voltage
TMP89FM82TDUG 32 KB 2 KB
  • TLCS-870/C1 core 8-Bit
  • Clock gearing: 1/4, 1/2, 1/1
  • Programmable Motor Driver (PMD2): 1 ch
LQFP 48 4.5 to 5.5 V
(@8MHz)
TMPM358FDTFG 512 KB 80 KB
  • Arm® Cortex®-M3 CPU core 32-Bit
  • Maximum operating frequency: 40 MHz
  • SLEEP Mode
  • Include 16 KB RAM for backup
LQFP100 4.5 to 5.5 V

Note: Microcontrollers can be used as a receive-only.

System Power Supply ICs
Part Number Functions Output Voltage Output Current Package Operating Voltage
TB9005FNG CPU voltage regulator
(with WDT)
5 V 8 mA SSOP20 6 to 18 V
TB9021FNG CPU voltage regulator
(with WDT)
5 V 200 mA TSSOP16 6 to 18 V
TB9042FTG**

CPU voltage regulator
DC/DC + LDO
(with WDT, SPI)

1.5/1.2 V
5 V
5 V
5/3.3 V(Backup)
1000 mA
400 mA
100 mA
10 mA
HQFN52 7 to 20 V
TB9044AFNG** CPU voltage regulator
DC/DC + LDO
(with WDT)
5 V
5 V
5 V
5 V
400 mA
100 mA
100 mA
100 mA
HTSSOP48 2.7 to 18 V

**: Under development

*ARM、Cortex和Thumb是ARM有限公司在歐洲和其它國家的註冊商標。

*本文提及到的系統和產品名稱可能是各自公司或組織的商標或註冊商標。

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