SLVSCX5B March   2015  – July 2015 DRV8701


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Bridge Control
      2. 7.3.2  Half-Bridge Operation
      3. 7.3.3  Current Regulation
      4. 7.3.4  Amplifier Output SO
        1. SNSOUT
      5. 7.3.5  PWM Motor Gate Drivers
      6. 7.3.6  IDRIVE Pin
      7. 7.3.7  Dead Time
      8. 7.3.8  Propagation Delay
      9. 7.3.9  Overcurrent VDS Monitor
      10. 7.3.10 Charge Pump
      11. 7.3.11 LDO Voltage Regulators
      12. 7.3.12 Gate Drive Clamp
      13. 7.3.13 Protection Circuits
        1. VM Undervoltage Lockout (UVLO)
        2. VCP Undervoltage Lockout (CPUV)
        3. Overcurrent Protection (OCP)
        4. Pre-Driver Fault (PDF)
        5. Thermal Shutdown (TSD)
      14. 7.3.14 Reverse Supply Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operating DRV8701 and H-Bridge on Separate Supplies
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Brushed-DC Motor Control
        1. Design Requirements
        2. Detailed Design Procedure
          1. External FET Selection
          2. IDRIVE Configuration
          3. Current Chopping Configuration
        3. Application Curves
      2. 8.2.2 Alternate Application
        1. Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. IDRIVE Configuration
        2. VM Boost Voltage
  9. Power Supply Recommendations
    1. 9.1 Bulk Capacitance Sizing
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

RGE Package
24-Pin VQFN
DRV8701E Top View

DRV8701 po_8701E_LVSCX5.gif

RGE Package
24-Pin VQFN
DRV8701P Top View

DRV8701 po_8701P_LVSCX5.gif

DRV8701E (PH/EN)

EN 14 Input Bridge enable input Logic low places the bridge in brake mode; see Table 1
PH 15 Input Bridge phase input Controls the direction of the H-bridge; see Table 1

DRV8701P (PWM)

IN1 15 Input Bridge PWM input Logic controls the state of H-bridge; see Table 2
IN2 14 Input

Common Pins

VM 1 Power Power supply Connect to motor supply voltage; bypass to GND with a 0.1-µF ceramic plus a 10-µF minimum capacitor rated for VM; additional capacitance may be required based on drive current
GND 5 Power Device ground Must be connected to ground
VCP 2 Power Charge pump output Connect a 16-V, 1-µF ceramic capacitor to VM
CPH 3 Power Charge pump switching nodes Connect a 0.1-µF X7R capacitor rated for VM between CPH and CPL
DVDD 8 Power Logic regulator 3.3-V logic supply regulator; bypass to GND with a 6.3-V, 1-µF ceramic capacitor
AVDD 7 Power Analog regulator 4.8-V analog supply regulator; bypass to GND with a 6.3-V, 1-µF ceramic capacitor
nSLEEP 13 Input Device sleep mode Pull logic low to put device into a low-power sleep mode with FETs High-Z; internal pulldown
IDRIVE 12 Input Gate drive current setting pin Resistor value or voltage forced on this pin sets the gate drive current; see applications section for more details
VREF 6 Input Analog reference input Controls the current regulation; apply a voltage between 0.3 V and AVDD
nFAULT 9 Open Drain Fault indication pin Pulled logic low with fault condition; open-drain output requires an external pullup
SNSOUT 10 Open Drain Sense comparator output Pulled logic low when the drive current hits the current chopping threshold; open-drain output requires an external pullup
SO 11 Output Shunt amplifier output Voltage on this pin is equal to the SP voltage times AV plus an offset; place no more than 1 nF of capacitance on this pin
SN 20 Input Shunt amplifier negative input Connect to SP through current sense resistor and to GND
SP 21 Input Shunt amplifier positive input Connect to low-side FET source and to SN through current sense resistor
GH1 17 Output High-side gate Connect to high-side FET gate
GH2 24
GL1 19 Output Low-side gate Connect to low-side FET gate
GL2 22
SH1 18 Input Phase node Connect to high-side FET source and low-side FET drain
SH2 23

External Passive Components

CVM1 VM GND 0.1-µF ceramic capacitor rated for VM
CVM2 VM GND ≥10-µF capacitor rated for VM
CVCP VCP VM 16-V, 1-µF ceramic capacitor
CSW CPH CPL 0.1-µF X7R capacitor rated for VM
CDVDD DVDD GND 6.3-V, 1-µF ceramic capacitor
CAVDD AVDD GND 6.3-V, 1-µF ceramic capacitor
RIDRIVE IDRIVE GND See Typical Applicationsfor resistor sizing
RnFAULT VCC(1) nFAULT ≥10-kΩ pullup
RSNSOUT VCC(1) SNSOUT ≥10-kΩ pullup
RSENSE SP SN/GND Optional low-side sense resistor
(1) VCC is not a pin on the DRV8701, but a VCC supply voltage pullup is required for open-drain outputs nFAULT and SNSOUT. The system controller supply can be used for this pullup voltage, or these pins can be pulled up to either AVDD or DVDD.

External FETs

Component Gate Drain Source Recommended
QHS1 GH1 VM SH1 Supports up to 200-nC FETs at 40-kHz PWM; see Detailed Design Procedure for more details