JAJSGV8B September   2019  – December 2019 DRV8904-Q1 , DRV8906-Q1 , DRV8908-Q1 , DRV8910-Q1 , DRV8912-Q1

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     概略回路図
  4. 4 改訂履歴
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions—DRV8912-Q1
    2.     Pin Functions—DRV8910-Q1
    3.     Pin Functions—DRV8908-Q1
    4.     Pin Functions—DRV8906-Q1
    5.     Pin Functions—DRV8904-Q1
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Half Bridge Drivers
        1. 8.3.1.1 Control Modes
          1. 8.3.1.1.1 Continuous Mode (Without PWM)
          2. 8.3.1.1.2 Chopping Mode (With PWM)
            1. 8.3.1.1.2.1 PWM Configuration
            2. 8.3.1.1.2.2 Free-Wheeling Mode (Synchronous Rectification) Disable / Enable
            3. 8.3.1.1.2.3 PWM Channels Mapping
            4. 8.3.1.1.2.4 PWM Channels Configuration (PWM Frequency and PWM Duty)
            5. 8.3.1.1.2.5 Half-Bridge Enable
          3. 8.3.1.1.3 Parallel Mode (Continuous Operation)
          4. 8.3.1.1.4 Parallel Mode (PWM Operation)
            1. 8.3.1.1.4.1 PWM Configuration
            2. 8.3.1.1.4.2 Free-Wheeling Mode (Synchronous Rectification) Disable / Enable
            3. 8.3.1.1.4.3 PWM Channels Mapping
            4. 8.3.1.1.4.4 PWM Channels Configuration (PWM Frequency and PWM Duty)
            5. 8.3.1.1.4.5 PWM Generators Disable
            6. 8.3.1.1.4.6 Half-Bridge Enable
            7. 8.3.1.1.4.7 PWM Generators Enable
        2. 8.3.1.2 Half-Bridge Drive Architecture
          1. 8.3.1.2.1 Slew Rate
          2. 8.3.1.2.2 Cross Conduction (Dead Time)
          3. 8.3.1.2.3 Propagation Delay
      2. 8.3.2 Pin Diagrams
        1. 8.3.2.1 Logic Level Input Pin (nSLEEP, SCLK and SDI)
        2. 8.3.2.2 Logic Level Input Pin (nSCS)
        3. 8.3.2.3 Open Drain Output Pin (nFAULT)
        4. 8.3.2.4 Push Pull Output Pin (SDO)
      3. 8.3.3 Protection Circuits
        1. 8.3.3.1 VM Supply Undervoltage Lockout (UVLO)
        2. 8.3.3.2 VM Supply Overvoltage Protection (OVP)
        3. 8.3.3.3 Logic Supply Power on Reset (POR)
        4. 8.3.3.4 Overcurrent Protection (OCP)
        5. 8.3.3.5 Open-load detection (OLD)
          1. 8.3.3.5.1 Active OLD
            1. 8.3.3.5.1.1 Negative-current OLD
          2. 8.3.3.5.2 Low-current OLD
          3. 8.3.3.5.3 Passive OLD
        6. 8.3.3.6 Thermal Warning (OTW)
        7. 8.3.3.7 Thermal Shutdown (OTSD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Sleep Mode (nSLEEP = 0)
      2. 8.4.2 Operating Mode (nSLEEP = 1)
      3. 8.4.3 Fault Mode
    5. 8.5 Programming
      1. 8.5.1 SPI
      2. 8.5.2 SPI Format
      3. 8.5.3 SPI Interface for Multiple Slaves
        1. 8.5.3.1 SPI Interface for Multiple Slaves in Daisy Chain
    6. 8.6 Register Map
      1. 8.6.1 DRV8912-Q1 and DRV8910-Q1 Register Maps
        1. 8.6.1.1 Status Registers
          1. 8.6.1.1.1 IC Status (IC_STAT) Register (Address = 0x00) [reset = 0x00]
            1. Table 20. IC Status Register Field Descriptions
          2. 8.6.1.1.2 Overcurrent Protection (OCP) Status 1 (OCP_STAT_1) Register (Address = 0x01) [reset = 0x00]
            1. Table 21. Overcurrent Protection (OCP) Status 1 Register Field Descriptions
          3. 8.6.1.1.3 Overcurrent Protection (OCP) Status 2 (OCP_STAT_2) Register (Address = 0x02) [reset = 0x00]
            1. Table 22. Overcurrent Protection (OCP) Status 2 Register Field Descriptions
          4. 8.6.1.1.4 Overcurrent Protection (OCP) Status 3 (OCP_STAT_3) Register (Address = 0x03) [reset = 0x00]
            1. Table 23. Overcurrent Protection (OCP) Status 3 Register Field Descriptions
          5. 8.6.1.1.5 Open-Load Detect (OLD) Status 1 (OLD_STAT_1) Register (Address = 0x04) [reset = 0x00]
            1. Table 24. Open-Load Detect (OLD) Status 1 Register Field Descriptions
          6. 8.6.1.1.6 Open-Load Detect (OLD) Status 2 (OLD_STAT_2) Register (Address = 0x05) [reset = 0x00]
            1. Table 25. Open-Load Detect (OLD) Status 2 Register Field Descriptions
          7. 8.6.1.1.7 Open-Load Detect (OLD) Status 3 (OLD_STAT_3) Register (Address = 0x06) [reset = 0x00]
            1. Table 26. Open-Load Detect (OLD) Status 3 Register Field Descriptions
        2. 8.6.1.2 Control Registers
          1. 8.6.1.2.1  Configuration (CONFIG_CTRL) Register (Address = 0x07) [reset = 0x00]
            1. Table 28. Configuration Register Field Descriptions
          2. 8.6.1.2.2  Operation Control 1 (OP_CTRL_1) Register (Address = 0x08) [reset = 0x00]
            1. Table 29. Operation Control 1 Register Field Descriptions
          3. 8.6.1.2.3  Operation Control 2 (OP_CTRL_2) Register (Address = 0x09) [reset = 0x00]
            1. Table 30. Operation Control 2 Register Field Descriptions
          4. 8.6.1.2.4  Operation Control 3 (OP_CTRL_3) Register (Address = 0x0A) [reset = 0x00]
            1. Table 31. Operation Control 3 Register Field Descriptions
          5. 8.6.1.2.5  PWM Control 1 (PWM_CTRL_1) Register (Address = 0x0B) [reset = 0x00]
            1. Table 32. PWM Control 1 Register Field Descriptions
          6. 8.6.1.2.6  PWM Control 2 (PWM_CTRL_2) Register (Address = 0x0C) [reset = 0x00]
            1. Table 33. PWM Control 2 Register Field Descriptions
          7. 8.6.1.2.7  Free-Wheeling Control 1 (FW_CTRL_1) Register (Address = 0x0D) [reset = 0x00]
            1. Table 34. Free-Wheeling Control 1 Register Field Descriptions
          8. 8.6.1.2.8  Free-Wheeling Control 2 (FW_CTRL_2) Register (Address = 0x0E) [reset = 0x00]
            1. Table 35. Free-Wheeling Control 2 Register Field Descriptions
          9. 8.6.1.2.9  PWM Map Control 1 (PWM_MAP_CTRL_1) Register (Address = 0x0F) [reset = 0x00]
            1. Table 36. PWM Map Control 1 Register Field Descriptions
          10. 8.6.1.2.10 PWM Map Control 2 (PWM_MAP_CTRL_2) Register (Address = 0x10) [reset = 0x00]
            1. Table 37. PWM Map Control 2 Register Field Descriptions
          11. 8.6.1.2.11 PWM Map Control 3 (PWM_MAP_CTRL_3) Register (Address = 0x11) [reset = 0x00]
            1. Table 38. PWM Map Control 3 Register Field Descriptions
          12. 8.6.1.2.12 PWM Frequency Control (PWM_FREQ_CTRL) Register (Address = 0x12) [reset = 0x00]
            1. Table 39. PWM Frequency Control Register Field Descriptions
          13. 8.6.1.2.13 PWM Duty Control Channel 1 (PWM_DUTY_CH1) Register (Address = 0x13) [reset = 0x00]
            1. Table 40. PWM Duty Control Channel 1 Register Field Descriptions
          14. 8.6.1.2.14 PWM Duty Control Channel 2 (PWM_DUTY_CH2) Register (Address = 0x14) [reset = 0x00]
            1. Table 41. PWM Duty Control Channel 2 Register Field Descriptions
          15. 8.6.1.2.15 PWM Duty Control Channel 3 (PWM_DUTY_CH3) Register (Address = 0x15) [reset = 0x00]
            1. Table 42. PWM Duty Control Channel 3 Register Field Descriptions
          16. 8.6.1.2.16 PWM Duty Control Channel 4 (PWM_DUTY_CH4) Register (Address = 0x16) [reset = 0x00]
            1. Table 43. PWM Duty Control Channel 4 Register Field Descriptions
          17. 8.6.1.2.17 Slew Rate Control 1 (SR_CTRL_1) Register (Address = 0x17) [reset = 0x00]
            1. Table 44. Slew Rate Control 1 Register Field Descriptions
          18. 8.6.1.2.18 Slew Rate Control 2 (SR_CTRL_2) Register (Address = 0x18) [reset = 0x00]
            1. Table 45. Slew Rate Control 2 Register Field Descriptions
          19. 8.6.1.2.19 Open-Load Detect (OLD) Control 1 (OLD_CTRL_1) Register (Address = 0x19) [reset = 0x00]
            1. Table 46. Open-Load Detect (OLD) Control (OLD_CTRL_1) Register Field Descriptions
          20. 8.6.1.2.20 Open-Load Detect (OLD) Control 2 (OLD_CTRL_2) Register (Address = 0x1A) [reset = 0x00]
            1. Table 47. Open-Load Detect (OLD) Control (OLD_CTRL_2) Register Field Descriptions
          21. 8.6.1.2.21 Open-Load Detect (OLD) Control 3 (OLD_CTRL_3) Register (Address = 0x1B) [reset = 0x00]
            1. Table 48. Open-Load Detect (OLD) Control (OLD_CTRL_3) Register Field Descriptions
          22. 8.6.1.2.22 Open-Load Detect (OLD) Control 4 (OLD_CTRL_4) Register (Address = 0x24) [reset = 0x00]
            1. Table 49. Open-Load Detect (OLD) Control (OLD_CTRL_4) Register Field Descriptions
      2. 8.6.2 DRV8908-Q1, DRV8906-Q1 and DRV8904-Q1 Register Maps
        1. 8.6.2.1 Status Registers
          1. 8.6.2.1.1 IC Status (IC_STAT) Register (Address = 0x00) [reset = 0x00]
            1. Table 54. IC Status Register Field Descriptions
          2. 8.6.2.1.2 Overcurrent Protection (OCP) Status 1 (OCP_STAT_1) Register (Address = 0x01) [reset = 0x00]
            1. Table 55. Overcurrent Protection (OCP) Status 1 Register Field Descriptions
          3. 8.6.2.1.3 Overcurrent Protection (OCP) Status 2 (OCP_STAT_2) Register (Address = 0x02) [reset = 0x00]
            1. Table 56. Overcurrent Protection (OCP) Status 2 Register Field Descriptions
          4. 8.6.2.1.4 Overcurrent Protection (OCP) Status 3 (OCP_STAT_3) Register (Address = 0x03) [reset = 0x00]
            1. Table 57. Overcurrent Protection (OCP) Status 3 Register Field Descriptions
          5. 8.6.2.1.5 Open-Load Detect (OLD) Status 1 (OLD_STAT_1) Register (Address = 0x04) [reset = 0x00]
            1. Table 58. Open-Load Detect (OLD) Status 1 Register Field Descriptions
          6. 8.6.2.1.6 Open-Load Detect (OLD) Status 2 (OLD_STAT_2) Register (Address = 0x05) [reset = 0x00]
            1. Table 59. Open-Load Detect (OLD) Status 2 Register Field Descriptions
          7. 8.6.2.1.7 Open-Load Detect (OLD) Status 3 (OLD_STAT_3) Register (Address = 0x06) [reset = 0x00]
            1. Table 60. Open-Load Detect (OLD) Status 3 Register Field Descriptions
        2. 8.6.2.2 Control Registers
          1. 8.6.2.2.1  Configuration (CONFIG_CTRL) Register (Address = 0x07) [reset = 0x00]
            1. Table 62. Configuration Register Field Descriptions
          2. 8.6.2.2.2  Operation Control 1 (OP_CTRL_1) Register (Address = 0x08) [reset = 0x00]
            1. Table 63. Operation Control 1 Register Field Descriptions
          3. 8.6.2.2.3  Operation Control 2 (OP_CTRL_2) Register (Address = 0x09) [reset = 0x00]
            1. Table 64. Operation Control 2 Register Field Descriptions
          4. 8.6.2.2.4  Operation Control 3 (OP_CTRL_3) Register (Address = 0x0A) [reset = 0x00]
            1. Table 65. Operation Control 3 Register Field Descriptions
          5. 8.6.2.2.5  PWM Control 1 (PWM_CTRL_1) Register (Address = 0x0B) [reset = 0x00]
            1. Table 66. PWM Control 1 Register Field Descriptions
          6. 8.6.2.2.6  PWM Control 2 (PWM_CTRL_2) Register (Address = 0x0C) [reset = 0x00]
            1. Table 67. PWM Control 2 Register Field Descriptions
          7. 8.6.2.2.7  Free-Wheeling Control 1 (FW_CTRL_1) Register (Address = 0x0D) [reset = 0x00]
            1. Table 68. Free-Wheeling Control 1 Register Field Descriptions
          8. 8.6.2.2.8  Free-Wheeling Control 2 (FW_CTRL_2) Register (Address = 0x0E) [reset = 0x00]
            1. Table 69. Free-Wheeling Control 2 Register Field Descriptions
          9. 8.6.2.2.9  PWM Map Control 1 (PWM_MAP_CTRL_1) Register (Address = 0x0F) [reset = 0x00]
            1. Table 70. PWM Map Control 1 Register Field Descriptions
          10. 8.6.2.2.10 PWM Map Control 2 (PWM_MAP_CTRL_2) Register (Address = 0x10) [reset = 0x00]
            1. Table 71. PWM Map Control 2 Register Field Descriptions
          11. 8.6.2.2.11 PWM Map Control 3 (PWM_MAP_CTRL_3) Register (Address = 0x11) [reset = 0x00]
            1. Table 72. PWM Map Control 3 Register Field Descriptions
          12. 8.6.2.2.12 PWM Map Control 4 (PWM_MAP_CTRL_4) Register (Address = 0x12) [reset = 0x00]
            1. Table 73. PWM Map Control 4 Register Field Descriptions
          13. 8.6.2.2.13 PWM Frequency Control 1 (PWM_FREQ_CTRL_1) Register (Address = 0x13 [reset = 0x00]
            1. Table 74. PWM Frequency Control 1 Register Field Descriptions
          14. 8.6.2.2.14 PWM Frequency Control 2 (PWM_FREQ_CTRL_2) Register (Address = 0x14 [reset = 0x00]
            1. Table 75. PWM Frequency Control 2 Register Field Descriptions
          15. 8.6.2.2.15 PWM Duty Control Channel 1 (PWM_DUTY_CH1) Register (Address = 0x15) [reset = 0x00]
            1. Table 76. PWM Duty Control Channel 1 Register Field Descriptions
          16. 8.6.2.2.16 PWM Duty Control Channel 2 (PWM_DUTY_CH2) Register (Address = 0x16) [reset = 0x00]
            1. Table 77. PWM Duty Control Channel 2 Register Field Descriptions
          17. 8.6.2.2.17 PWM Duty Control Channel 3 (PWM_DUTY_CH3) Register (Address = 0x17) [reset = 0x00]
            1. Table 78. PWM Duty Control Channel 3 Register Field Descriptions
          18. 8.6.2.2.18 PWM Duty Control Channel 4 (PWM_DUTY_CH4) Register (Address = 0x18) [reset = 0x00]
            1. Table 79. PWM Duty Control Channel 4 Register Field Descriptions
          19. 8.6.2.2.19 PWM Duty Control Channel 5 (PWM_DUTY_CH5) Register (Address = 0x19) [reset = 0x00]
            1. Table 80. PWM Duty Control Channel 5 Register Field Descriptions
          20. 8.6.2.2.20 PWM Duty Control Channel 6 (PWM_DUTY_CH6) Register (Address = 0x1A) [reset = 0x00]
            1. Table 81. PWM Duty Control Channel 6 Register Field Descriptions
          21. 8.6.2.2.21 PWM Duty Control Channel 7 (PWM_DUTY_CH7) Register (Address = 0x1B) [reset = 0x00]
            1. Table 82. PWM Duty Control Channel 7 Register Field Descriptions
          22. 8.6.2.2.22 PWM Duty Control Channel 8 (PWM_DUTY_CH8) Register (Address = 0x1C) [reset = 0x00]
            1. Table 83. PWM Duty Control Channel 8 Register Field Descriptions
          23. 8.6.2.2.23 Slew Rate Control 1 (SR_CTRL_1) Register (Address = 0x1D [reset = 0x00]
            1. Table 84. Slew Rate Control 1 Register Field Descriptions
          24. 8.6.2.2.24 Slew Rate Control 2 (SR_CTRL_2) Register (Address = 0x1E) [reset = 0x00]
            1. Table 85. Slew Rate Control 2 Register Field Descriptions
          25. 8.6.2.2.25 Open-Load Detect (OLD) Control 1 (OLD_CTRL_1) Register (Address = 0x1F) [reset = 0x00]
            1. Table 86. Open-Load Detect (OLD) Control (OLD_CTRL_1) Register Field Descriptions
          26. 8.6.2.2.26 Open-Load Detect (OLD) Control 2 (OLD_CTRL_2) Register (Address = 0x20) [reset = 0x00]
            1. Table 87. Open-Load Detect (OLD) Control (OLD_CTRL_2) Register Field Descriptions
          27. 8.6.2.2.27 Open-Load Detect (OLD) Control 3 (OLD_CTRL_3) Register (Address = 0x21) [reset = 0x00]
            1. Table 88. Open-Load Detect (OLD) Control (OLD_CTRL_3) Register Field Descriptions
          28. 8.6.2.2.28 Open Load Detect (OLD) Control 4 (OLD_CTRL_4) Register (Address = 0x22) [reset = 0x00]
            1. Table 89. Open Load Detect (OLD) Control (OLD_CTRL_4) Register Field Descriptions
          29. 8.6.2.2.29 Open Load Detect (OLD) Control 5 (OLD_CTRL_5) Register (Address = 0x23) [reset = 0x00]
            1. Table 90. Open Load Detect (OLD) Control (OLD_CTRL_5) Register Field Descriptions
          30. 8.6.2.2.30 Open Load Detect (OLD) Control 6 (OLD_CTRL_6) Register (Address = 0x24) [reset = 0x00]
            1. Table 91. Open Load Detect (OLD) Control (OLD_CTRL_6) Register Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Primary Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Motor Current Rating
          2. 9.2.1.2.2 Power Dissipation
      2. 9.2.2 Alternative Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 H-Bridge Requirements for Parallel Operation
      3. 9.2.3 Application Curves
    3. 9.3 Thermal Application
      1. 9.3.1 Power Dissipation
        1. 9.3.1.1 Power Dissipation Due to Device On-State Resistance (RDS(ON))
        2. 9.3.1.2 Power Dissipation Due to Switching Losses
        3. 9.3.1.3 Power Dissipation Due to Quiescent Current
        4. 9.3.1.4 Total Power Dissipation
      2. 9.3.2 PCB Types
      3. 9.3.3 Thermal Parameters
      4. 9.3.4 Transient Thermal
      5. 9.3.5 Device Junction Temperature Estimation
  10. 10Power Supply Recommendations
    1. 10.1 Bulk Capacitance Sizing
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 関連リンク
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 コミュニティ・リソース
    5. 12.5 商標
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 Glossary
  13. 13メカニカル、パッケージ、および注文情報
    1. 13.1 Package Option Addendum
      1. 13.1.1 Packaging Information
      2. 13.1.2 Tape and Reel Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.3.3.5.1.1 Negative-current OLD

The DRV89XX-Q1 device also includes a negative-current OLD mode. The negative current can flow either through the body diode of high-side FET or the FET itself depending on whether or not the channel is configured for synchronous rectification. Figure 54 shows the current re-circulation through the body diode of the high-side FET when the synchronous rectification mode is OFF (i.e. HB2_FW = 0). In this case, the active OLD will not falsely report an open-load condition since the OLD circuit only enables when the FET is ON. Negative-current OLD will also work during re-circulation through the low-side FETs.

Figure 55 shows the negative current re-circulation through the high-side FET when synchronous rectification is ON (i.e. HB2_FW = 1). In this scenario, for default operation (OLD_NEG_EN = 0), the device can show a false open-load fault since the FET current is lower than the positive OLD threshold. However, when negative-current OLD mode is enabled, the device will only flag an open-load fault if IOUTX < IOLD_NEG. This mode is enabled by setting the OLD_NEG_EN bit in OLD_CTRL3 register.

Figure 56 shows the waveforms of false open-load detection when the negative-current OLD setting is disabled (OLD_NEG_EN = 0). As shown in this figure, the high-side FET of the OUT1 channel is always switched ON and the low-side and high-side FET of the OUT2 channel are operating in complimentary way (i.e. synchronous rectification mode is enabled). In synchronous rectification, the current flows in negative direction from OUT2 to VM (i.e. FET Source to Drain) during the high-side FET conduction. Initially, for the first PWM cycle, the OLD mode is disabled to show the currents in different FETs during the motor operation. When OLD is enabled in second PWM cycle, then the device registers a false open-load detect during the high-side FET conduction as shown in Figure 56. The nFAULT pin is pulled low and both high-side and low-side FET of OUT2 channels are disabled. The body diode of the high side FET (OUT2) conducts to complete the motor current path.

This false detection of open load is eliminated by enabling the negative-current OLD setting (OLD_NEG_EN = 1). As shown in Figure 57, the negative OLD current setting (IOLD_NEG) is enabled for the high-side FET of OUT2 channel. This setting allows the negative current path (from source to drain) in high-side FET. The nFAULT pin is latched high and OUT2 channel is not disabled when OLD is enabled in second PWM cycle.

DRV8904-Q1 DRV8906-Q1 DRV8908-Q1 DRV8910-Q1 DRV8912-Q1 drv89xx-PWM-mode-SR_off.gifFigure 54. Negative Current Flow in OUT2 by Body Diode of High-Side FET
DRV8904-Q1 DRV8906-Q1 DRV8908-Q1 DRV8910-Q1 DRV8912-Q1 drv89xx-PWM-mode-SR_on.gifFigure 55. Negative Current Flow in High-Side FET of OUT2 Channel
DRV8904-Q1 DRV8906-Q1 DRV8908-Q1 DRV8910-Q1 DRV8912-Q1 drv89xx-OLD-Neg.gifFigure 56. Waveforms Showing False OLD With Negative-Current OLD Disabled
DRV8904-Q1 DRV8906-Q1 DRV8908-Q1 DRV8910-Q1 DRV8912-Q1 drv89xx-OLD-Neg-1.gifFigure 57. Waveforms Showing Operation with Negative-Current OLD Enabled