ZHCSLK6B July 2021 – February 2025 TPS1HC100-Q1
PRODUCTION DATA
請(qǐng)參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
To keep maximum voltage on the SNS pin at an acceptable range for the system, calculate the RSNS as in Equation 12. To achieve better current sense accuracy. A 1% accuracy or better resistor is preferred.
|
Parameter |
Value |
|---|---|
|
VDIAG_EN |
5 V |
|
ILOAD,max |
2 A |
|
ILOAD,min |
5 mA |
|
VADC,min |
5 mV |
|
VHR |
1 V |
Having the maximum SNS voltage scale with the DIAG_EN voltage removes the need for a Zener diode on the SNS pin going to the ADC.
The current limit must be set to an acceptable level, so with the KCL tolerances, the current limit of 4A is chosen. To set the programmable current limit value at 4 A , calculate the RLIM as in Equation 12.
For a more accurate current limit estimation with the error tolerances of KCL see the Current Limit Accuracy section and use the graph to estimate the error at each desired current limit value.
TI recommends RPROT = 5 kΩ to ensure the current going into the digital pins (EN, DIAG_EN, LATCH) is limited.
TI recommends a 1-kΩ resistor and 200-V, 0.2-A diode (BAS21 for example) for the GND network.