ZHCS389C June 2011 – December 2022 DRV8662
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- RGP|20
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
- RGP|20
訂購信息
8.2.1.2.4 Current Consumption Calculation
It is useful to understand how the voltage driven onto a piezo actuator relates to the current consumption from the power supply. Modeling a piezo element as a pure capacitor is reasonably accurate. The equation for the current through a capacitor for an applied sinusoid is given by Equation 3:
where f is the frequency of the sinusoid in Hz, C is the capacitance of the piezo load in farads, and VP is the peak voltage. At the power supply (usually a battery), the actuator current is multiplied by the boost-supply ratio and divided by the efficiency of the boost converter as shown by Equation 4.
Substituting typical values for the variables of this equation yields a typical peak current seen by the battery with a sine input as in Equation 5.
