SLVSBA8G March   2012  – March 2018 DRV110

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      DRV110 Supplied by Power Line Voltage
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 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 Keep Time
      2. 7.3.2 PWM Current Control
      3. 7.3.3 Configuring Peak and Hold Currents
      4. 7.3.4 Configuring the PWM Frequency
      5. 7.3.5 Voltage Supply and Integrated Zener Diode
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Mode
      2. 7.4.2 Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Current Limiting Resistor Selection
        2. 8.2.2.2 Passive Component Selection
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  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 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

8.2.2.1 Current Limiting Resistor Selection

The temperature range, input voltage, and enable state must be considered when selecting the current limiting resistor. These values must be considered because the Zener clamping voltage of the DRV110 device starts dropping from its ideal 15 V at temperatures greater than 45°C when the EN pin is pulled low. Applications that leave the EN pin floating or pulled high at all times only require a current-limiting resistor when the input voltage is greater than 15 V across all temperature.

While using a current-limiting resistor is not required when the supply voltage (VS) is less than the Zener clamping voltage, VZENER, TI recommends populating a small resistor in case of possible input voltage transients during operation. At the very least, TI recommends placing a resistor footprint jumped by a 0-Ω resistor. Table 3 lists recommended resistor values for voltages close to VZENER and common voltages greater than VZENER for different enable states.

Table 3. Recommended Resistor Values
–40°C ≤ TA ≤ 125°C

SUPPLY VOLTAGE RECOMMENDED CURRENT-LIMITING RESISTOR
EN Pulled High or Floating
< 15 V 500 Ω
24 V 9 kΩ
48 V 33 kΩ
110 V to 120 V 100 kΩ
220 V to 240 V 200 kΩ
EN Toggled Between 0 and 1
10 V 510 Ω
11 V 510 Ω
12 V 1 kΩ
13 V 2 kΩ
14 V 3 kΩ
15 V 3.9 kΩ
24 V 13 kΩ
48 V 36 kΩ
110 V to 120 V 100 kΩ
220 V to 240 V 200 kΩ