Melexis TPMS sensors
MLX91803/MLX91804
Aug 2019
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Content
1) Melexis TPMS MLX91804 architecture and key specs
2) MLX91804 key parameters and Melexis value proposition
3) MLX91804 development tools overview
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Melexis TPMS MLX91804 overview
Low power
Sleep current - 90 nA
Pressure measurement (raw) - 0.11 µAs
MCU run current - 470 µA @ 2 MHz
Integrated RF-TX 315/433 MHz
Itx = 5 mA (@ Pout = 5 dBm)
Up to 150 kbps baud rate
Integrated acceleration sensor Z/X/XZ
Up to 700 g measurement range
Built-in self test
Product status
Automotive qualified
High volume production
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
FLASH program memory 16 kB
Typ. TPMS application + library = 6 kB
Wireless firmware update
Multiple pressure ranges
100 – 500/900/1400 kPa
Robust package
Harsh environment capable
DFN14 wettable flanks
5x4 mm², 0.5 mm pitch
Melexis TPMS MLX91803 – accelero-less
Low power
Sleep current - 90 nA
Pressure measurement (raw) - 0.11 µAs
MCU run current - 470 µA @ 2 MHz
Integrated RF-TX 315/433 MHz
Itx = 5 mA (@ Pout = 5 dBm)
Up to 150 kpbs baud rate
FLASH program memory 16 kB
Typ. TPMS application + library = 6 kB
Wireless firmware update
Robust package
Harsh environment capable
DFN14 wettable flanks
5x4 mm², 0.5 mm pitch
Multiple pressure ranges available
100 – 500 kPa, 100 – 900 kPa, 100 – 1400 kPa
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Key parameters and value proposition (1)
Parameter
Value
Sleep current @ 25°C [nA], typ
(max)
90
(120)
Sleep current @ 70°C [µA]
0.23
Melexis value proposition
(Tier1/OEM/end user value)
Energy saving
RF current @ 5 dBm [mA]
5
MCU run current @ 2 MHz CPU clock [mA]
0.47
Pressure measurement power consumption – raw and
compensated [µAs]
0.11
0.65
RF communication baud rate [kbps]
150
Pressure accuracy [kPa]
±4
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Battery size reduction  module
size/weight reduction
Extra functions with same battery size
Overall system accuracy and timely
warning
Key parameters and value proposition (2)
Parameter
Value
Melexis value proposition
(Tier1/OEM/end user value)
Internal XTAL load caps
YES
Less components on PCB  improved
reliability
Acceleration sensing range [g]
700
High speed operation
Acceleration sensing axis
Z/X/XZ
Coverage of all mechanical designs and
auto-location methods
Acceleration sensor built-in self test
YES
Module test cost reduction
Field return investigation
Package area [mm²]
20
PCB/module size/weight reduction
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Energy saving with MLX91804 – trucks TPMS
Sleep mode current/charge consumption
IC
Total Charge
in 10 years (mAh)
Melexis MLX91804
20
Other IC
120
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Fast Pressure Sampling / Tire Fill Assistant
Strategy:
Use “raw” pressure measurement to detect fill event
(every 3 s in stationary)
Use compensated pressure measurement for reporting
(RF message during filling)
Fill Assistant Comparison
Pressure Measurements Power Consumption
Compensated
Measurement
Charge (uAs)
Raw Measurement
Charge (uAs)
Total Charge
in 10 years (mAh)
Melexis
0.65
0.11
3.2
Other IC
3.25
1.2
35.0
IC
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
MLX91804 development tools
Compiler, Debugger
Hardware emulator/memory programmer - Mini E-Mlx
Firmware platform and low level library
Application software examples
Documentation
Evaluation board EVB91804
Reference design board RDB91804
Samples
EVB91804
Mini E-Mlx
Local support (RF matching, firmware)
Samples
MLX91804
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
RDB91804
DVK91804 – TPMS Software development kit
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
EVK91804 – TPMS evaluation kit
RDB91804
MLX
91804
MLX TPMS MultiTool
Matching
network +
RF antenna
Data
USB
Connection
RF Receiver
433.92 MHz
FPGA
LF Antenna
125 kHz
Request
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
LF Transmitter
125 kHz
Thank You!
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Melexis NV © - No part of this document may be reproduced without the prior written consent of Melexis. (2019)
The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.