SLVAFZ3 December   2024 DRV8161 , DRV8162 , DRV8350 , DRV8350F , DRV8353 , DRV8353F

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2System Power Requirements
  6. 3Motor Current and MOSFET Selection
    1. 3.1 How Does a BLDC Motor Driver System Work?
    2. 3.2 Motor Current and QG Value Relation
    3. 3.3 Role of a Motor Driver
    4. 3.4 Can my MOSFET be Driven or Commutated?
      1. 3.4.1 Example 1 – Medium Power (4.8kW – 48V × 100A)
      2. 3.4.2 Example 2 – High Power (19.2kW – 48V × 400A)
  7. 4Motor Driver Specifications to Consider
    1. 4.1 DRV8353 - Internally Generated Gate Drive Supply
    2. 4.2 DRV8161/DRV8162 – Externally Generated Gate Drive Supply
  8. 5Advantages of TI’s BLDC Drivers With Smart Gate Drive
  9. 6Maximum Source and Sink Current and QGD
  10. 7Older Designs
  11. 8Summary
  12. 9References

4.1 DRV8353 - Internally Generated Gate Drive Supply

DRV8353 uses a charge-pump architecture to generate the high side drive voltage and a linear regulator to generate the low side gate drive voltage.

Using the larger power Example 2, the average gate current of 21.6mA is needed from the gate driver. More specifically 10.8mA from high side supply and 10.8mA from low side supply.

The data sheet states that at 15V VM, the driver can output up to 25mA from VCP (high side supply) and 25mA from VGLS (low side supply). Therefore, the driver is more than capable of driving loads at such high power.