ZHCSGK4E September 2017 – November 2019 TLV7011 , TLV7012 , TLV7021 , TLV7022
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings (Single)
- 6.2 Absolute Maximum Ratings (Dual)
- 6.3 ESD Ratings
- 6.4 Recommended Operating Conditions (Single)
- 6.5 Recommended Operating Conditions (Dual)
- 6.6 Thermal Information (Single)
- 6.7 Thermal Information (Dual)
- 6.8 Electrical Characteristics (Single)
- 6.9 Switching Characteristics (Single)
- 6.10 Electrical Characteristics (Dual)
- 6.11 Switching Characteristics (Dual)
- 6.12 Timing Diagrams
- 6.13 Typical Characteristics
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
- DSG|8
訂購信息
8.2.3.2 Detailed Design Procedure
The oscillation frequency is determined by the resistor and capacitor values. The following calculation provides details of the steps.
Figure 45. Square-Wave Oscillator Timing Thresholds First consider the output of Figure Figure 44 is high which indicates the inverted input VC is lower than the noninverting input (VA). This causes the C1 to be charged through R4, and the voltage VC increases until it is equal to the noninverting input. The value of VA at the point is calculated by Equation 7.
if R1 = R2= R3, then VA1 = 2 VCC/ 3
At this time the comparator output trips pulling down the output to the negative rail. The value of VAat this point is calculated by Equation 8.
if R1 = R2 = R3, then VA2 = VCC/3
The C1 now discharges though the R4, and the voltage VCC decreases until it reaches VA2. At this point, the output switches back to the starting state. The oscillation period equals to the time duration from for C1 from 2VCC/3 to VCC / 3 then back to 2VCC/3, which is given by R4C1 × ln 2 fro each trip. Therefore, the total time duration is calculated as 2 R4C1 × ln 2. The oscillation frequency can be obtained by Equation 9:
