ZHCSDG6C March 2015 – January 2023 DRV2700
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1
AC-Coupled DAC Input Application
- 8.2.1.1 Design Requirements
- 8.2.1.2
Detailed Design Procedure
- 8.2.1.2.1 Piezo Load Selection
- 8.2.1.2.2 Programming The Boost Voltage
- 8.2.1.2.3 Inductor and Transformer Selection
- 8.2.1.2.4 Programing the Boost and Flyback Current-Limit
- 8.2.1.2.5 Boost Capacitor Selection
- 8.2.1.2.6 Pulldown FET and Resistors
- 8.2.1.2.7 Low-Voltage Operation
- 8.2.1.2.8 Current Consumption Calculation
- 8.2.1.2.9 Input Filter Considerations
- 8.2.1.2.10 Output Limiting Factors
- 8.2.1.2.11 Startup and Shutdown Sequencing
- 8.2.1.3 Application Curves
- 8.2.2 Filtered AC Coupled Single-Ended PWM Input Application
- 8.2.3 DC-Coupled DAC Input Application
- 8.2.4 DC-Coupled Reference Input Application
- 8.2.5 Flyback Circuit
- 8.2.1
AC-Coupled DAC Input Application
- 8.3 System Example
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封装选项
请参考 PDF 数据表获取器件具体的封装图。
机械数据 (封装 | 引脚)
- RGP|20
散热焊盘机械数据 (封装 | 引脚)
- RGP|20
订购信息
8.2.1.2.4 Programing the Boost and Flyback Current-Limit
The peak current drawn from the supply through the inductor is set solely by the R(REXT) resistor. This peak current-limit is independent of the selected inductance value, but the inductor is capable of handling this programmed limit. Use Equation 3 to calculate the relationship between R(REXT) and I(LIM).
Equation 3. 
where
- K = 10 500
- Vref = 1.35 V
- I(LIM) is the desired peak current-limit through the inductor or transformer
- R(INT) = 60 Ω
For this design example, because the saturation current is 1.5 A, select 1 A for the I(LIM) value. Using Equation 3, the value of R(EXT) is approximately 14 kΩ.