AMT49106 datasheet(2/74 Pages) ALLEGRO

2 / 74 page

Automotive Three-Phase MOSFET Driver

AMT49106

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

SELECTION GUIDE

Part Number

Packing

Package

AMT49106KJPTR

1500 pieces per 13-inch reel

48-terminal LQFP with exposed thermal pad

Table of Contents

Features and Benefits...................................................................1

Description....................................................................................1

Package........................................................................................1

Selection Guide.............................................................................2

Absolute Maximum Ratings ..........................................................3

Thermal Characteristics................................................................3

Pinout Diagram and Terminal List .................................................4

Functional Block Diagram.............................................................5

Electrical Characteristics...............................................................6

Sense Amplifier Voltage Definitions ............................................14

Timing Diagrams.........................................................................15

Logic Truth Tables.......................................................................19

Functional Description ................................................................21

Input and Output Terminal Functions ......................................22

Power Supplies .......................................................................23

Low Supply Voltage Operation............................................23

VREG Charge Pump Regulator

..................................... 23

VCP Charge Pump Regulator .............................................23

Gate Drives .............................................................................23

Top-Off Charge Pump .............................................................24

High-Side Gate Drive ..............................................................24

Low-Side Gate Drive ...............................................................24

Bootstrap Supply.....................................................................24

High-Side Gate Drive ..............................................................24

Low-Side Gate Drive ...............................................................24

Gate Drive Passive Pull-Down ................................................24

Dead Time...............................................................................24

Gate Drive Control...................................................................25

Logic Control Inputs ................................................................26

Output Enable / Disable ..........................................................26

Sleep Mode .............................................................................27

Logic Outputs ..........................................................................27

Current Sense Amplifiers.........................................................27

Diagnostic Monitors.................................................................28

DIAG Diagnostic Output..........................................................29

Diagnostic Registers ...............................................................29

Chip-Level Protection..............................................................29

Chip Fault State: Internal Logic Undervoltage (POR) .........30

Chip Fault State: Overtemperature .....................................30

Chip Fault State: Serial Error ..............................................30

Chip Fault State: EEPROM.................................................30

Operational Monitors...............................................................30

Monitor: VREG Undervoltage and Overvoltage ..................31

Monitor: VCP Undervoltage.................................................31

Monitor: Temperature Warning............................................31

Monitor: VBB Supply Overvoltage and Undervoltage .........31

Monitor: VIO Undervoltage and Overvoltage ......................32

Monitor: VOOR Undervoltage and Overvoltage..................32

Monitor: VGS Undervoltage ................................................32

Monitor: LSS Disconnect.....................................................33

Monitor: Logic Terminal Overvoltage...................................33

Monitor: Q&A Watchdog Timeout ........................................34

Monitor: Q&A Watchdog Active Mode .................................34

Power Bridge and Load Faults................................................36

Bridge: Overcurrent Detect..................................................36

Bridge: Open-Load Detect...................................................36

Bridge: Bootstrap Capacitor Undervoltage Fault.................38

Bridge: MOSFET VDS Overvoltage Fault ...........................38

Fault Action..............................................................................39

Fault Masks.............................................................................40

Diagnostic and System Verification.........................................40

On-Line Verification.................................................................40

Bridge: Phase State Monitor ...............................................40

Sense Amplifier Disconnect.................................................41

Off-Line Verification .................................................................41

Bridge: Phase Disconnected...............................................41

Verify: VREG Undervoltage.................................................42

Verify: VREG Overvoltage...................................................42

Verify: Temperature Warning...............................................42

Verify: Overtemperature ......................................................42

Verify: VBB Supply Overvoltage..........................................42

Verify: VBB Supply Undervoltage........................................43

Verify: VGS Undervoltage ...................................................43

Verify: Bootstrap Capacitor Undervoltage Fault ..................43

Verify: MOSFET VDS Overvoltage Fault.............................43

Verify: LSS Disconnect........................................................43

Verify: VIO Input Out of Range............................................44

Verify: VOOR Input Out of Range .......................................44

Verify: VCP Undervoltage....................................................44

Verify: Logic Terminal Overvoltage......................................44

Verify: Overcurrent Detect and Sense Amplifier..................44

Verify: Q&A Watchdog Timeout ...........................................44

Verify: All Gate Drives Off....................................................45

Verify: On-State Open-Load Detection And Sense Amplifier .. 45

Serial Interface............................................................................46

Configuration Registers...........................................................50

Stop-On Fault Registers..........................................................51

Verification Registers...............................................................51

Diagnostic Registers ...............................................................51

Mask Registers........................................................................51

Control Register ......................................................................52

Status Register........................................................................52

Non-Volatile Memory...............................................................53

Serial Register Reference .......................................................54

Applications Information..............................................................71

Bootstrap Capacitor Selection.................................................71

VREG Capacitor Selection......................................................71

Supply Decoupling ..................................................................71

Power Dissipation....................................................................71

Input/Output Structures...............................................................72

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