SLVSHO3 April   2024 DRV8235

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Operating Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 External Components
      2. 7.3.2 Summary of Features
      3. 7.3.3 Bridge Control
      4. 7.3.4 Current Sense and Regulation (IPROPI)
        1. 7.3.4.1 Current Sensing
        2. 7.3.4.2 Current Regulation
          1. 7.3.4.2.1 Fixed Off-Time Current Regulation
          2. 7.3.4.2.2 Cycle-By-Cycle Current Regulation
      5. 7.3.5 Stall Detection
      6. 7.3.6 Motor Voltage and Speed Regulation
        1. 7.3.6.1 Internal Bridge Control
        2. 7.3.6.2 Setting Speed/Voltage Regulation Parameters
          1. 7.3.6.2.1 Speed and Voltage Set
          2. 7.3.6.2.2 Speed Scaling Factor
            1. 7.3.6.2.2.1 Target Speed Setting Example
          3. 7.3.6.2.3 Motor Resistance Inverse
          4. 7.3.6.2.4 Motor Resistance Inverse Scale
          5. 7.3.6.2.5 KMC Scaling Factor
          6. 7.3.6.2.6 KMC
          7. 7.3.6.2.7 VSNS_SEL
        3. 7.3.6.3 Soft-Start and Soft-Stop
          1. 7.3.6.3.1 TINRUSH
      7. 7.3.7 Protection Circuits
        1. 7.3.7.1 Overcurrent Protection (OCP)
        2. 7.3.7.2 Thermal Shutdown (TSD)
        3. 7.3.7.3 VM Undervoltage Lockout (VM UVLO)
        4. 7.3.7.4 Overvoltage Protection (OVP)
        5. 7.3.7.5 nFAULT Output
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Low-Power Sleep Mode
      3. 7.4.3 Fault Mode
    5. 7.5 Programming
      1. 7.5.1 I2C Communication
        1. 7.5.1.1 I2C Write
        2. 7.5.1.2 I2C Read
  9. 8 Register Map
    1. 8.1 DRV8235_STATUS Registers
    2. 8.2 DRV8235_CONFIG Registers
    3. 8.3 DRV8235_CTRL Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application: Brushed DC Motor
      1. 9.2.1 Design Requirements
      2. 9.2.2 Stall Detection
        1. 9.2.2.1 Application Description
          1. 9.2.2.1.1 Stall Detection Timing
          2. 9.2.2.1.2 Hardware Stall Threshold Selection
      3. 9.2.3 Motor Speed and Voltage Regulation Application
        1. 9.2.3.1 Tuning Parameters
          1. 9.2.3.1.1 Resistance Parameters
          2. 9.2.3.1.2 KMC and KMC_SCALE
            1. 9.2.3.1.2.1 Case I
            2. 9.2.3.1.2.2 Case II
              1. 9.2.3.1.2.2.1 Method 1: Tuning from Scratch
                1. 9.2.3.1.2.2.1.1 Tuning KMC_SCALE
                2. 9.2.3.1.2.2.1.2 Tuning KMC
              2. 9.2.3.1.2.2.2 Method 2: Using the Proportionality factor
                1. 9.2.3.1.2.2.2.1 Working Example
      4. 9.2.4 Motor Voltage
      5. 9.2.5 Motor Current
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Bulk Capacitance
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.5 Electrical Characteristics

4.5 V ≤ VVM ≤ 38 V, –40°C ≤ TJ ≤ 150°C (unless otherwise noted). Typical values are at TJ = 27°C, VVM = 24 V.
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
POWER SUPPLIES (VM)
IVMQVM sleep mode currentnSLEEP = 0 V, VVM = 24 V, TJ = 27°C0.11µA
IVMVM active mode currentnSLEEP = 3.3 V, IN1 = 3.3 V, IN2 = 0 V, VVM = 24 V3.54mA
tWAKETurnon timenSLEEP = 1 to I2C ready410μs
LOGIC-LEVEL INPUTS (IN1, IN2, SDA, SCL, nSLEEP)
VILInput logic low voltage00.5V
VIHInput logic high voltage1.55.5V
VHYSInput hysteresis160mV
VHYSInput hysterisisnSLEEP pin60
IILInput logic low currentVI = 0 V-11µA
IIHInput logic high currentVI = 5 V33100µA
RPDInput pulldown resistance, INxTo GND100kΩ
tDEGLITCHInput logic deglitch, INx50ns
TRI-LEVEL INPUTS (A1, A0)
VTILTri-level input logic low voltage00.6V
VTIHZTri-level input Hi-Z voltage1.822.2V
VTIHTri-level input logic high voltage2.75.5V
RTPDTri-level pulldown resistanceto GND200kΩ
ITPUTri-level pullup currentto 3.3 V10µA
OPEN-DRAIN OUTPUTS (nFAULT, SDA)
VOLOutput logic low voltageIOD = 5 mA0.3V
IOZOutput logic high currentVOD = 3.3 V-11µA
tPW_nFAULTnFAULT low pulse widthRC Count overflow, RC_REP = 11b305070µs
CBSDA capacitive load for each bus line400pF
DRIVER OUTPUTS (OUTx)
RDS(ON)_HSHigh-side MOSFET on resistanceIOUTx = 1 A; TJ = 25 °C300360mΩ
RDS(ON)_HSHigh-side MOSFET on resistanceIOUTx = 1 A; TJ = 125 °C450540mΩ
RDS(ON)_HSHigh-side MOSFET on resistanceIOUTx = 1 A; TJ = 150 °C500600mΩ
RDS(ON)_LSLow-side MOSFET on resistanceIOUTx = -1 A; TJ = 25 °C300360mΩ
RDS(ON)_LSLow-side MOSFET on resistanceIOUTx = -1 A; TJ = 125 °C450540mΩ
RDS(ON)_LSLow-side MOSFET on resistanceIOUTx = -1 A; TJ = 150 °C500600mΩ
VSDBody diode forward voltageIOUTx = -1 A0.8V
tRISEOutput rise timeVOUTx rising from 10% to 90% of VVM200ns
tFALLOutput fall timeVOUTx falling from 90% to 10% of VVM140ns
tPDInput to output propagation delayInput to OUTx650ns
tDEADOutput dead time200ns
CURRENT SENSE AND REGULATION (IPROPI, VREF)
VREF_INTInternal reference voltageINT_VREF = 1b2.8833.12V
AIPROPICurrent scaling factor1500µA/A
AERRCurrent mirror total errorIOUT = 0.1 A, VVM ≥ 5.5 V-1010%
AERRCurrent mirror total error0.15 A ≤ IOUT < 0.5 A, VVM ≥ 5.5 V-77%
AERRCurrent mirror total errorIOUT ≥ 0.5 A, VVM ≥ 5.5 V-55%
tOFFCurrent regulation off time20µs
tBLANKCurrent sense blanking timeTBLANK = 0b1.8µs
tBLANKCurrent sense blanking timeTBLANK = 1b1µs
tDEGCurrent regulation and stall detection deglitch timeTDEG = 0b2µs
tDEGCurrent regulation and stall detection deglitch timeTDEG = 1b1µs
tINRUSHInrush time blanking for stall detection56716ms
Voltage regulation
ΔVLINELine regulation5.5 V ≤ VVM ≤ 38 V, VOUT = 5 V, IOUT = 2 A±2%
ΔVLOADLoad regulationVVM = 24 V, VOUT = 5 V, IOUT = 100 mA to 2 A±1%
PROTECTION CIRCUITS
VUVLO_VMVM supply undervoltage lockout (UVLO)Supply rising4.154.34.45V
Supply falling4.054.24.35V
VUVLO_HYSSupply UVLO hysteresisRising to falling threshold100mV
tUVLOSupply undervoltage deglitch timeVVM falling to OUTx disabled10µs
VRSTVM UVLO resetVM falling, device reset, no I2C communications3.9V
VOVP_THOvervoltage protection thresholdVOUT - VVM200mV
tOVP_ONOvervoltage protection turn-on time10µs
tOVP_OFFOvervoltage protection turn-off time250µs
IOCPOvercurrent protection trip point3.7A
tOCPOvercurrent protection deglitch time2µs
tRETRYRetry time1.7ms
TTSDThermal shutdown temperature150175°C
THYSThermal shutdown hysteresis40°C