SLLSFP7A
december 2022 – april 2023
MCT8315A
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Characteristics of the SDA and SCL bus for Standard and Fast mode
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Output Stage
7.3.2
Device Interface
7.3.2.1
Interface - Control and Monitoring
7.3.2.2
I2C Interface
7.3.3
Step-Down Mixed-Mode Buck Regulator
7.3.3.1
Buck in Inductor Mode
7.3.3.2
Buck in Resistor mode
7.3.3.3
Buck Regulator with External LDO
7.3.3.4
AVDD Power Sequencing from Buck Regulator
7.3.3.5
Mixed Mode Buck Operation and Control
7.3.3.6
Buck Under Voltage Protection
7.3.3.7
Buck Over Current Protection
7.3.4
AVDD Linear Voltage Regulator
7.3.5
Charge Pump
7.3.6
Slew Rate Control
7.3.7
Cross Conduction (Dead Time)
7.3.8
Speed Control
7.3.8.1
Analog Mode Speed Control
7.3.8.2
PWM Mode Speed Control
7.3.8.3
I2C based Speed Control
7.3.8.4
Frequency Mode Speed Control
7.3.9
Starting the Motor Under Different Initial Conditions
7.3.9.1
Case 1 – Motor is Stationary
7.3.9.2
Case 2 – Motor is Spinning in the Forward Direction
7.3.9.3
Case 3 – Motor is Spinning in the Reverse Direction
7.3.10
Motor Start Sequence (MSS)
7.3.10.1
Initial Speed Detect (ISD)
7.3.10.2
Motor Resynchronization
7.3.10.3
Reverse Drive
7.3.10.4
Motor Start-up
7.3.10.4.1
Align
7.3.10.4.2
Double Align
7.3.10.4.3
Initial Position Detection (IPD)
7.3.10.4.3.1
IPD Operation
7.3.10.4.3.2
IPD Release Mode
7.3.10.4.3.3
IPD Advance Angle
7.3.10.4.4
Slow First Cycle Startup
7.3.10.4.5
Open loop
7.3.10.4.6
Transition from Open to Closed Loop
7.3.11
Closed Loop Operation
7.3.11.1
120o Commutation
7.3.11.1.1
High-Side Modulation
7.3.11.1.2
Low-Side Modulation
7.3.11.1.3
Mixed Modulation
7.3.11.2
Variable Commutation
7.3.11.3
Lead Angle Control
7.3.11.4
Closed loop accelerate
7.3.12
Speed Loop
7.3.13
Input Power Regulation
7.3.14
Anti-Voltage Surge (AVS)
7.3.15
Output PWM Switching Frequency
7.3.16
Fast Start-up (< 50 ms)
7.3.16.1
BEMF Threshold
7.3.16.2
Dynamic Degauss
7.3.17
Fast Deceleration
7.3.18
Active Demagnetization
7.3.18.1
Active Demagnetization in action
7.3.19
Motor Stop Options
7.3.19.1
Coast (Hi-Z) Mode
7.3.19.2
Recirculation Mode
7.3.19.3
Low-Side Braking
7.3.19.4
High-Side Braking
7.3.19.5
Active Spin-Down
7.3.20
FG Configuration
7.3.20.1
FG Output Frequency
7.3.20.2
FG Open-Loop and Lock Behavior
7.3.21
Protections
7.3.21.1
VM Supply Undervoltage Lockout
7.3.21.2
AVDD Undervoltage Lockout (AVDD_UV)
7.3.21.3
BUCK Undervoltage Lockout (BUCK_UV)
7.3.21.4
VCP Charge Pump Undervoltage Lockout (CPUV)
7.3.21.5
Overvoltage Protection (OVP)
7.3.21.6
Overcurrent Protection (OCP)
7.3.21.6.1
OCP Latched Shutdown (OCP_MODE = 00b)
7.3.21.6.2
OCP Automatic Retry (OCP_MODE = 01b)
7.3.21.6.3
OCP Report Only (OCP_MODE = 10b)
7.3.21.6.4
OCP Disabled (OCP_MODE = 11b)
7.3.21.7
Buck Overcurrent Protection
7.3.21.8
Cycle-by-Cycle (CBC) Current Limit (CBC_ILIMIT)
7.3.21.8.1
CBC_ILIMIT Automatic Recovery next PWM Cycle (CBC_ILIMIT_MODE = 000xb)
7.3.21.8.2
CBC_ILIMIT Automatic Recovery Threshold Based (CBC_ILIMIT_MODE = 001xb)
7.3.21.8.3
CBC_ILIMIT Automatic Recovery after 'n' PWM Cycles (CBC_ILIMIT_MODE = 010xb)
7.3.21.8.4
CBC_ILIMIT Report Only (CBC_ILIMIT_MODE = 0110b)
7.3.21.8.5
CBC_ILIMIT Disabled (CBC_ILIMIT_MODE = 0111b or 1xxxb)
7.3.21.9
Lock Detection Current Limit (LOCK_ILIMIT)
7.3.21.9.1
LOCK_ILIMIT Latched Shutdown (LOCK_ILIMIT_MODE = 00xxb)
7.3.21.9.2
LOCK_ILIMIT Automatic Recovery (LOCK_ILIMIT_MODE = 01xxb)
7.3.21.9.3
LOCK_ILIMIT Report Only (LOCK_ILIMIT_MODE = 1000b)
7.3.21.9.4
LOCK_ILIMIT Disabled (LOCK_ILIMIT_MODE = 1xx1b)
7.3.21.10
Thermal Warning (OTW)
7.3.21.11
Thermal Shutdown (TSD)
7.3.21.12
Motor Lock (MTR_LCK)
7.3.21.12.1
MTR_LCK Latched Shutdown (MTR_LCK_MODE = 00xxb)
7.3.21.12.2
MTR_LCK Automatic Recovery (MTR_LCK_MODE= 01xxb)
7.3.21.12.3
MTR_LCK Report Only (MTR_LCK_MODE = 1000b)
7.3.21.12.4
MTR_LCK Disabled (MTR_LCK_MODE = 1xx1b)
7.3.21.13
Motor Lock Detection
7.3.21.13.1
Lock 1: Abnormal Speed (ABN_SPEED)
7.3.21.13.2
Lock 2: Loss of Sync (LOSS_OF_SYNC)
7.3.21.13.3
Lock3: No-Motor Fault (NO_MTR)
7.3.21.14
SW VM Undervoltage Protection
7.3.21.15
SW VM Overvoltage Protection
7.3.21.16
IPD Faults
7.4
Device Functional Modes
7.4.1
Functional Modes
7.4.1.1
Sleep Mode
7.4.1.2
Standby Mode
7.4.1.3
Fault Reset (CLR_FLT)
7.5
External Interface
7.5.1
DRVOFF Functionality
7.5.2
DAC outputs
7.5.3
Current Sense Output
7.5.4
Oscillator Source
7.5.4.1
External Clock Source
7.5.5
External Watchdog
7.6
EEPROM access and I2C interface
7.6.1
EEPROM Access
7.6.1.1
EEPROM Write
7.6.1.2
EEPROM Read
7.6.2
I2C Serial Interface
7.6.2.1
I2C Data Word
7.6.2.2
I2C Write Transaction
7.6.2.3
I2C Read Transaction
7.6.2.4
I2C Communication Protocol Packet Examples
7.6.2.5
I2C Clock Stretching
7.6.2.6
CRC Byte Calculation
7.7
EEPROM (Non-Volatile) Register Map
7.7.1
Algorithm_Configuration Registers
7.7.2
Fault_Configuration Registers
7.7.3
Hardware_Configuration Registers
7.7.4
Gate_Driver_Configuration Registers
7.8
RAM (Volatile) Register Map
7.8.1
Fault_Status Registers
7.8.2
System_Status Registers
7.8.3
Algo_Control Registers
7.8.4
Device_Control Registers
7.8.5
Algorithm_Variables Registers
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Application curves
8.2.1.1
Motor startup
8.2.1.2
120o and variable commutation
8.2.1.3
Faster startup time
8.2.1.4
Setting the BEMF threshold
8.2.1.5
Maximum speed
8.2.1.6
Faster deceleration
9
Power Supply Recommendations
9.1
Bulk Capacitance
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Thermal Considerations
10.3.1
Power Dissipation
11
Device and Documentation Support
11.1
Support Resources
11.2
Trademarks
11.3
Electrostatic Discharge Caution
11.4
Glossary
12
Mechanical, Packaging, and Orderable Information
12.1
Tape and Reel Information
Package Options
Mechanical Data (Package|Pins)
RGF|40
MPQF173F
Thermal pad, mechanical data (Package|Pins)
RGF|40
QFND672
Orderable Information
sllsfp7a_oa
sllsfp7a_pm
7.7
EEPROM (Non-Volatile) Register Map