JAJSCC6A June   2016  – July 2016 DRV2511-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
  6. 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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Input and Configurable Pre-amplifier
      2. 7.3.2 Pulse-Width Modulator (PWM)
      3. 7.3.3 Designed for low EMI
      4. 7.3.4 Device Protection Systems
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation in Shutdown Mode
      2. 7.4.2 Operation in Standby Mode
      3. 7.4.3 Operation in Active Mode
    5. 7.5 Programming
      1. 7.5.1 Gain
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Single-Ended Source
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Optional Components
          2. 8.2.1.2.2 Capacitor Selection
          3. 8.2.1.2.3 Solenoid Selection
          4. 8.2.1.2.4 Output Filter Considerations
        3. 8.2.1.3 Application Curves
        4. 8.2.1.4 Differential Input Diagram
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
      1. 11.1.1 デベロッパー・ネットワークの製品に関する免責事項
    2. 11.2 商標
    3. 11.3 静電気放電に関する注意事項
    4. 11.4 Glossary
  12. 12メカニカル、パッケージ、および注文情報

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

7 Detailed Description

7.1 Overview

The DRV2511-Q1 device is a high current haptic driver specifically designed for inductive loads, such as solenoids and voice coils.

The output stage consists of a full H-bridge capable of delivering 8 A of peak current.

The design uses an ultra-efficient switching output technology developed by Texas Instruments, but with features added for the automotive industry. The DRV2511-Q1 device provides protection functions such as undervoltage lockout, over-current protection and over-temperature protection. This technology allows for reduced power consumption, reduced heat, and reduced peak currents in the electrical system.

The DRV2511-Q1 device is automotive qualified.

7.2 Functional Block Diagram

DRV2511-Q1 detailed_schematic_slos916.gif

7.3 Feature Description

7.3.1 Analog Input and Configurable Pre-amplifier

The DRV2511-Q1 device features a differential input stage that cancels common-mode noise that appears on the inputs. The DRV2511-Q1 device also features four gain settings that are configurable via external resistors.

Table 1. Gain Configuration Table

GAIN R1 R2 INPUT IMPEDANCE
20 dB 5.6 kΩ open 60 kΩ
26 dB 20 kΩ 100 kΩ 30 kΩ
32 dB 39 kΩ 100 kΩ 15 kΩ
36 dB 47 kΩ 75 kΩ 9 kΩ
DRV2511-Q1 gain_confit_sch_slos916.gif Figure 3. Gain Configuration

7.3.2 Pulse-Width Modulator (PWM)

The DRV2511-Q1 device features BD modulation scheme with high bandwidth, low noise, low distortion, and excellent stability.

The BD modulation scheme allows for smaller ripple currents through the load. Each output switches from 0 V to the supply voltage. With no input, the OUT+ and OUT- pins are in phase with each other so that there is little or no current in the load. For positive differential inputs, the duty cycle of OUT+ is greater than 50% and the duty cycle of OUT- is lower than 50% for a positive differential output voltage. The opposite is true for negative differential inputs. The voltage accross the load sits at 0 V throughout most of the switching period, reducing the switching current, which reduces the I2R losses in the load.

DRV2511-Q1 bd_mod_slos919.gif Figure 4. BD Mode Modulation

7.3.3 Designed for low EMI

The DRV2511-Q1 device design has minimal parasitic inductances due to the short leads on the package. This dramatically reduces EMI that results from current passing from the die to the system PCB. The design incorporates circuitry that optimizes output transitions that causes EMI. Follow the recommended design requirements in the Design Requirements section.

7.3.4 Device Protection Systems

The DRV2511-Q1 device features a complete set of protection circuits carefully designed to protect the device against permanent failures due to shorts, over-temperature, over-voltage, and under-voltage scenarios. The INTZ pin signals if an error is detected.

Table 2. Fault Reporting Table

FAULT TRIGGERING CONDITION INTZ ACTION LATCH?
Over-current Output short or short to PVDD or GND pulled low output in high impedance Latched
Over-temperature Tj > 150 ºC pulled low output in high impedance Latched
Under-voltage PVDD < 4.5 V - output in high impedance Self-clearing
Over-voltage PVDD > 27 V - output in high impedance Self-clearing

When the "Latched" conditions happen, the device must be reset with the EN signal in order to clear the fault. If automatic recovery from these conditions is desired, connect the INTZ pin directly to the EN pin. This allows the INTZ pin function to automatically drive the EN pin low which clears the latched condition.

7.4 Device Functional Modes

The DRV2511-Q1 device has multiple power states to optimize power consumption.

7.4.1 Operation in Shutdown Mode

The NRST pin of the DRV2511-Q1 device puts the device in a shutdown mode. When NRST is asserted (logic low), all internal blocks of the device are off to achieve ultra low power.

7.4.2 Operation in Standby Mode

The STDBY pin of the DRV2511-Q1 device puts the device in a standby mode. When STDBY is asserted (logic high), some internal blocks of the device are off to achieve low power while preserving the ability to wake up quickly to achieve low latency waveform playback.

7.4.3 Operation in Active Mode

The DRV2511-Q1 device is in active mode when it has a valid supply, and it is not in either shutdown or standby modes. In this mode the DRV2511-Q1 device is fully on and reproducing at the output the input times the gain.

7.5 Programming

7.5.1 Gain

The DRV2511-Q1 device has a configurable gain that is controlled through external resistors. Please see the Analog Input and Configurable Pre-amplifier section for more details.