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

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

8.1 Application Information

The DRV2511-Q1 device is a high-efficiency driver for inductive loads, such as solenoids and voice-coils. The typical use of the device is on haptic applications where short, strong waveforms are desired to create a haptic event that will be coming from the application processor.

8.2 Typical Applications

8.2.1 Single-Ended Source

To use the DRV2511-Q1 with a single-ended source, apply either a voltage divider to bias INB to 3 V, tie to GND or use a 0.1-μF cap from INB to GND to have the device self bias. Apply the single-ended signal to the INA pin.

DRV2511-Q1 app_sch_SE_slos916.gif Figure 5. Typical Application Schematic

8.2.1.1 Design Requirements

For most applications the following component values found in Table 3 below can be used.

Table 3. Component Requirements Table

COMPONENT DESCRIPTION SPECIFICATION TYPICAL VALUE
C1 Supply capacitor Capacitance 22 µF and 0.1 µF for PVDD & AVDD
C2/C3 Boost capacitor Capacitance 0.22 µF
C4/C5 Output snubber capacitor Capacitance 470 pF
C6 Regulator capacitor Capacitance 1 µF
C9 Input decoupling capacitor Capacitance 0.1 µF
R1/R2 Output snubber resistor Resistance 3.3 Ω
R(PU) Pull-up resistor Resistance 100 kΩ

8.2.1.2 Detailed Design Procedure

8.2.1.2.1 Optional Components

Note that in the diagrams, there are a few optional external components. These optional external components may be needed in the application to meet EMI/EMC standards and specifications by filters necessary frequency spectrums.

8.2.1.2.2 Capacitor Selection

A bulk bypass capacitor should be mounted between VBAT and GND. The capacitance needs to be >22 uF with a X5R or better rating on the power pins to GND. Also include two ceramic capacitors in the ranges of 220 pF to 1 uF and 100 nF to 1 uF. The bootstrap capacitors, BSTA and BSTB, should be 220-nF ceramic capacitors of quality X5R or better rated for at least the maximum rating of the pin.

8.2.1.2.3 Solenoid Selection

The DRV2511-Q1 solenoid driver can accommodate a variety of solenoids. Solenoids should have an equivalent resistance of 1.6 Ω or greater. Solenoids with lower resistances are prone to driving high currents. A maximum peak current of 8-A should not be exceeded. The DRV2511-Q1 will go into a shutdown mode to protect itself from overcurrent.

8.2.1.2.4 Output Filter Considerations

The output filter is optional and is mainly for limiting peak currents. A second-order Butterworth low-pass filter with the cut-off frequency set to a few kilohertz should be sufficient. See Equation 2, Equation 3, and Equation 4 for example filter design.

Equation 1. DRV2511-Q1 Q_deltaT_SLOS808.gif
Equation 2. DRV2511-Q1 Lx_new_SLOS808.gif
Equation 3. DRV2511-Q1 2xc_SLOS808.gif
Equation 4. DRV2511-Q1 wo2pi_new4_SLOS808.gif

8.2.1.3 Application Curves

These application curves were taken using an HA200 solenoid with a 100-g mass, and the acceleration was measured using the DRV-AAC16-EVM accelerometer. The following scales apply to the graphs:

  • Output Differential Voltage scale is shown on the plots at 5-V/div
  • Acceleration scale is 5.85-G/div
  • Current scale is 2-A/div

DRV2511-Q1 Fig1_Square_Click_Input_slos916.gif Figure 6. Voltage and Acceleration vs Time (Input Square Wave)
DRV2511-Q1 Fig1_Ramp_Click_slos916.png Figure 8. Voltage and Acceleration vs Time (Ramp Wave)
DRV2511-Q1 Fig1_Square_Click_slos916.png Figure 7. Voltage and Acceleration vs Time (Square Wave)
DRV2511-Q1 Fig2_Sine_Click_slos916.png Figure 9. Voltage and Acceleration vs Time (1/2 Sine Wave)

8.2.1.4 Differential Input Diagram

To use the DRV2511-Q1 with a differential input source, apply both inputs differentially from a control source (GPIO, DAC, etc...).

DRV2511-Q1 app_sch_slos916.gif Figure 10. Typical Application Schematic