SBVS404A April 2020 – June 2020 TLV4062 , TLV4082
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 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
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
- DRY|6
訂購信息
8.2.2.2 Detailed Design Procedure
Configure the circuit as shown in Figure 25. Connect V+ to a 3.3 V power rail and connect V- to ground. The resistor network is used to create an early warning detection signal at OUT2, which will give a warning alert as VMON approaches the max limit, changing state from a logic low to a logic high. OUT2 will stay high for a longer period until VMON is no longer in the warning zone. OUT1 will be used when VMON reaches the max limit and transition from a logic low to a logic high. This type of topology can be used for sensitive systems where advanced notice of the power supply over-voltage detection is needed.
Use VMON2, the threshold for a low to high transition at OUT2, IIN_RES, the current flow through the resistor network, to determine the minimum total resistance necessary to achieve the current consumption specification.
where
- VMON2 is the target voltage at which OUT2 goes high when VMON rises
- IIN_RES is the current flowing through the resistor network
After RTOTAL is determined, R3 can be calculated using Equation 6. Select the nearest 1% resistor value for R3. In this case, 845 kΩ is the closest value.
Use the voltage divider equation Equation 7 The voltage divider equation controls the V MON1 voltage at which OUT1 will transition from a logic high to a logic low.
where
- VMON1 is the target voltage at which OUT1 goes low when VMON falls
Rearranging Equation 7 to solve for R2 yields Equation 8Select the nearest 1% resistor value for R2. In this case, 55.6kΩ is the closest value.
Use Equation 9 to calculate R1. Select the nearest 1% resistor value for R1. In this case, 1.87 MΩ is a 1% resistor.
