Monolithic Power Systems, Inc. · NASDAQ:MPWR
Monolithic Power Systems — Technical Presentation (April 2020)
21 slides from Monolithic Power Systems's technical presentation, Apr 29, 2020
Slide 1: Solutions for Ultra-Low Power Angle Sensing
Starts at 11:00 CEST/MESZ 9:00 UTC Solutions for Ultra-Low Power Angle Sensing Presenter: Marko Hepp April 29, 2020
Slide 2: Solutions for Ultra-Low Power Angle Sensing
Solutions for Ultra-Low Power Angle Sensing Presenter: Marko Hepp April 29, 2020
Slide 3: MPS Business Development Manager Sensors EMEA
MPS Business Development Manager Sensors EMEA Marko Hepp • > 13 Years IC Product Management, Marketing, Support and Sales • > 10 Year Industrial Automation Software & Systems • > 27 Years in and for Semiconductor Industry • Founding Manager of the BiSS interface consortium for the encoder industry •
Slide 4: Today's Agenda
Today’s Agenda The Motivation Hall Based Position Sensing Systems Solutions for Ultra-Low Power Angle Sensing How to Accomplish Saving Power in Systems Effective Method WOC Wake-On-Change to Save Power Systematic Impact Open Q&A MPS Webinar: Solutions for Ultra Low Power Angle Sensing
Slide 5: The Motivation
The Motivation Picture Source: https://de.cleanpng.com/ MPS Webinar: Solutions for Ultra Low Power Angle Sensing
Slide 6: Angular Sensing with MagAlpha Family
Angular Sensing with MagAlpha Family Output Options 8-14 bit digital Non SPI angle Volatile Memory 1-1024 pulse ABZ Encoder Digital 8-14 bit PWM Filter PWM angle SpinAxis Sensor Commutation UVW signals Field Strength MAG Detect signals MPS Webinar: Solutions for Ultra Low Power Angle Sensing
Slide 7: MagAlpha Spinaxis Advantages
MagAlpha Spinaxis™ Advantages • Resolution: From 8 to 14 bit (+/-3 Sigma) • Wide Speed Range: Supports speeds from 0 to 100k rpm or more • Flexible Magnet Topologies: End and Side of Shaft supported • Fast angle sensing: 1µs Sampling, 3µs to 10µs latency at any constant speed • Wide Magnetic Field R
Slide 8: Low Power Sensors: MA780 + MA782
Low Power Sensors: MA780 + MA782 • Resolution: From 8 to 12 bit • Wide Speed Range: Supports speeds from 0 to 100k rpm • Fast angle sensing: 1 µs Sampling, on demand, • Low Latency: 4 µs at any constant speed • Wide Magnetic Field Range: 15mT to greater than 100mT supported • Small Footprint: QFN16-
Slide 9: MA780 + 782 Low Power Angle Sensor
MA780 + 782 Low Power Angle Sensor Always on < 1 µA Only on when sensor active 10 mA MPS Webinar: Solutions for Ultra Low Power Angle Sensing
Slide 10: MA780/782 Low Power Angle Sensor
MA780/782 Low Power Angle Sensor Wake and sleep provides very low average power in battery applications active stby • Power cycling: 10 mA • User Controlled 0 mA • Automatic Mode (self pulsed) • WOC (Wake-On-Change) 1/sample rate • 10 mA when Active sample average current (µA) • < 1 µA in Idle rate
Slide 11: MA780/782 Low Power Angle Sensor
MA780/782 Low Power Angle Sensor MA780 1. User Control Mode EN µC Sensor activity fully user controlled DV Dig In EN pin to control active / low power DV = angle data valid SPI SPI master MA780 µC 2. Automatic Sample Cycle (ASC) DV Dig In Independent low power sensor. Tactive/Tstby time programmable
Slide 12: User Control Mode: External Sensor Control
User Control Mode: External Sensor Control MA780 EN µC • µC controls Sensor Power/Timing DV Dig In SPI SPI master • Sensor converts Position in Active phase • Sensor indicates DV (Data Valid) to µC • Access via SPI • Position Data Access in Active and Idle
Slide 13: Automatic Sample Cycle (ASC): Sensor Based Timing
Automatic Sample Cycle (ASC): Sensor Based Timing Simplest usage Reading the New Data (ND) output MA780 MA780 µC µC Dig In DV Dig In SPI SPI master SPI SPI master zero threshold: Non zero threshold:
Slide 14: Wake-On-Change (WOC): Sensor Based Motion Detection
Wake-On-Change (WOC): Sensor Based Motion Detection • Fixed Reference MA780 µC ND Dig In SPI SPI master • Auto Updated Reference*
Slide 15: Comparing Modes
Comparing Modes Typical HMI Conditions: • Sensor Cycle: 5 Hz = 200 ms • Sensor MA782: Active = 10 mA @ 36 µs; Idle = 1 µA • µC ESP32: Active = 35 mA @ UCM 70 µs, ASC 25 µs, WOC 25 µs ; Sleep = 10 µA Mode Time of Interaction Power Demand UCM 200 ms 100,000 % ASC 200 ms 73,716 % WOC 200 ms 73,716 % WO
Slide 16: Mixing Modes
Mixing Modes ASC - Active ASC - Idle MA EN master MA APC master DV ND SPI SPI
Slide 17: MA780/782 Ultra-Low Power Applications
MA780/782 Ultra-Low Power Applications Battery powered devices like dials, smart thermostats, smart locks, ... Wake and check for movement every few milliseconds
Slide 18: Resolution and Adjustable Filter Window
Resolution and Adjustable Filter Window Window Time Filter size constant 𝝉 settling time FW(0:3) [µs] [µs] 0 1 1 1 2 3 2 4 7 3 8 15 4 16 31 5 32 63 6 64 127 7 128 255 8 256 511 9 512 1023 10 1024 2047 11 2048 4095 12 4096 8191 13 8192 16383 14 16384 32767 15 32768 65535
Slide 19: Sensor Application Range
Sensor Application Range MA102 MA302 MA310 MA330 12-bit resolution 12-bit resolution 12-bit resolution 14-bit resolution motor SPI 8 bit ABZ 1..256ppr ABZ, UVW ABZ, UVW applications UVW 1..8 PP UVW 1..8 PP Weak B-field Configurable BW • Wide Application Range • Up to 12 bit Resolution MA780 MA730 MA
Slide 20: Enabling Ultra-Low Power System Architecture
Enabling Ultra-Low Power System Architecture • Ultra-Low Power capable Sensor • Wide Configuration Range • Wide Operation Range • Wide Performance Range • System Structure Flexibility • Roles of Master and Slave • Time + Event based Operation World's Smallest Absolute ICEncoder®
Slide 21: Summary
Summary Growing Low Power Applications Hall Based Position Sensing Systems Available Solutions for Ultra-Low Power Angle Sensing Effective Saving Power Combining multiple modes for User Interaction and Motion Control System Structure and Design Open Q&A MPS Webinar: Solutions for Ultra Low Power Ang
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