ZHCSH39B November 2017 – September 2019 ISOW7821
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 修訂歷史記錄
- 5 說(shuō)明 （續(xù)）
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Power Ratings
- 7.6 Insulation Specifications
- 7.7 Safety-Related Certifications
- 7.8 Safety Limiting Values
- 7.9 Electrical Characteristics—5-V Input, 5-V Output
- 7.10 Supply Current Characteristics—5-V Input, 5-V Output
- 7.11 Electrical Characteristics—5-V Input, 3.3-V Output
- 7.12 Supply Current Characteristics—5-V Input, 3.3-V Output
- 7.13 Electrical Characteristics—3.3-V Input, 3.3-V Output
- 7.14 Supply Current Characteristics—3.3-V Input, 3.3-V Output
- 7.15 Switching Characteristics—5-V Input, 5-V Output
- 7.16 Switching Characteristics—5-V Input, 3.3-V Output
- 7.17 Switching Characteristics—3.3-V Input, 3.3-V Output
- 7.18 Insulation Characteristics Curves
- 7.19 Typical Characteristics
- 8 Parameter Measurement Information
- 9 Detailed Description
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13器件和文檔支持
- 14機(jī)械、封裝和可訂購(gòu)信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DWE|16
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購(gòu)信息
10.2.2 Detailed Design Procedure
The ISOW7821 device only requires external bypass capacitors to operate. These low-ESR ceramic bypass capacitors must be placed as close to the chip pads as possible.
Optional 100 µF capacitor can be added between VCC and GND1; refer to Power Supply Recommendations.
Figure 31. Typical Circuit Hook-Up The VCC power-supply input provides power to isolated data channels and to the isolated DC-DC converter. Use Equation 1 to calculate the total power budget on the primary side.
Equation 1. ICC = (VISO × IISO) / (η × VCC) + Iinpx
where
- ICC is the total current required by the primary supply.
- VISO is the isolated supply voltage.
- IISO is the external load on the isolated supply voltage.
- η is the efficiency.
- VCC is the supply voltage.
- Iinpx is the total current drawn for the isolated data channels and power converter when data channels are toggling at a specific data rate. This data is shown in the Electrical Characteristics—5-V Input, 5-V Output table.