ZHCSH31B August 2017 – February 2018 DRV10987
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 說明 （續）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1 Motor Parameters
- 8.4.2 Starting the Motor Under Different Initial Conditions
- 8.4.3 Motor Start Sequence
- 8.4.4 Align Current
- 8.4.5 Start-Up Current Setting
- 8.4.6 Closed Loop
- 8.4.7 Current Limits
- 8.4.8 Lock Detect and Fault Handling
- 8.4.9 Anti-Voltage Surge Function
- 8.4.10 PWM Output
- 8.4.11 FG Customized Configuration
- 8.4.12
Diagnostics and Visibility
- 8.4.12.1 Motor-Status Readback
- 8.4.12.2 Motor-Speed Readback
- 8.4.12.3 Motor Electrical-Period Readback
- 8.4.12.4 BEMF Constant Readback
- 8.4.12.5 Motor Estimated Position by IPD
- 8.4.12.6 Supply-Voltage Readback
- 8.4.12.7 Speed-Command Readback
- 8.4.12.8 Speed-Command Buffer Readback
- 8.4.12.9 Fault Diagnostics
- 8.5
Register Maps
- 8.5.1 I2C Serial Interface
- 8.5.2 Register Map
- 8.5.3
Register Descriptions
- 8.5.3.1 FaultReg Register (address = 0x00) [reset = 0x00]
- 8.5.3.2 MotorSpeed Register (address = 0x01) [reset = 0x00]
- 8.5.3.3 MotorPeriod Register (address = 0x02) [reset = 0x00]
- 8.5.3.4 MotorKt Register (address = 0x03) [reset = 0x00]
- 8.5.3.5 MotorCurrent Register (address = 0x04) [reset = 0x00]
- 8.5.3.6 IPDPosition–SupplyVoltage Register (address = 0x05) [reset = 0x00]
- 8.5.3.7 SpeedCmd–spdCmdBuffer Register (address = 0x06) [reset = 0x00]
- 8.5.3.8 AnalogInLvl Register (address = 0x07) [reset = 0x00]
- 8.5.3.9 DeviceID–RevisionID Register (address = 0x08) [reset = 0x00]
- 8.5.3.10 Unused Registers (addresses = 0x011 Through 0x2F)
- 8.5.3.11 SpeedCtrl Register (address = 0x30) [reset = 0x00]
- 8.5.3.12 EEPROM Programming1 Register (address = 0x31) [reset = 0x00]
- 8.5.3.13 EEPROM Programming2 Register (address = 0x32) [reset = 0x00]
- 8.5.3.14 EEPROM Programming3 Register (address = 0x33) [reset = 0x00]
- 8.5.3.15 EEPROM Programming4 Register (address = 0x34) [reset = 0x00]
- 8.5.3.16 EEPROM Programming5 Register (address = 0xYY) [reset = 0x00]
- 8.5.3.17 EEPROM Programming6 Register (address = 0x36) [reset = 0x00]
- 8.5.3.18 Unused Registers (addresses = 0x37 Through 0x5F)
- 8.5.3.19 EECTRL Register (address = 0x60) [reset = 0x00]
- 8.5.3.20 Unused Registers (addresses = 0x61 Through 0x8F)
- 8.5.3.21 CONFIG1 Register (address = 0x90) [reset = 0x00]
- 8.5.3.22 CONFIG2 Register (address = 0x91) [reset = 0x00]
- 8.5.3.23 CONFIG3 Register (address = 0x92) [reset = 0x00]
- 8.5.3.24 CONFIG4 Register (address = 0x93) [reset = 0x00]
- 8.5.3.25 CONFIG5 Register (address = 0x94) [reset = 0x00]
- 8.5.3.26 CONFIG6 Register (address = 0x95) [reset = 0x00]
- 8.5.3.27 CONFIG7 Register (address = 0x96) [reset = 0x00]
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
8.4.8 Lock Detect and Fault Handling
The DRV10987 device provides several options for determining if the motor becomes locked as a result of some external torque. Five lock-detect schemes work together to ensure the lock condition is detected quickly and reliably. Figure 33 shows the logic which integrates the various lock-detect schemes. When a lock condition is detected, the DRV10987 device takes action to prevent continuously driving the motor in order to prevent damage to the system or the motor.
In addition to detecting if there is a locked motor condition, the DRV10987 device also identifies and takes action if there is no motor connected to the system.
Each of the five lock-detect schemes and the no-motor detection can be disabled by their respective register bits, LockEn[5:0].
When a lock condition is detected, the FaultReg register provides an indication of which of the six different conditions was detected on Lock5 to Lock0. These bits are reset when the motor restarts. The bits in the FaultReg register are set even if the lock detect scheme is disabled.
The DRV10987 device reacts to either locked-rotor or no-motor-connected conditions by putting the output drivers into a high-impedance state. To prevent the energy in the motor from pumping the supply voltage, the DRV10987 device incorporates an anti-voltage-surge (AVS) process whenever the output stages transition into the high-impedance state. The AVS function is described in Anti-Voltage Surge Function. After entering the high-impedance state as a result of a fault condition, the system tries to restart after tLOCK_OFF.
Figure 33. Lock Detect and Fault Diagnosis