ZHCSP56 September 2023 TPS1HTC30-Q1
PRODUCTION DATA
To keep maximum voltage on the SNS pin at an acceptable range for the system, use the following equation to calculate the RSNS. To achieve better current sense accuracy. A 1% accuracy or better resistor is preferred.
|
Parameter |
Value |
|---|---|
|
VDIAG_EN |
5 V |
|
ILOAD,max |
6 A |
|
ILOAD,min |
20 mA |
|
VADC,min |
5 mV |
|
VHR |
1 V |
In other applications, more emphasis can be put on the lower end measurable values which increases RSNS. Likewise, if the higher currents are of more interest the RSNS can be decreased.
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.
To set the programmable current limit value at 5 A, use the following equation to calculate the RLIM.
TI recommends RPROT = 10 kΩ to ensure the current going into the digital pins (EN, DIAG_EN, LATCH) is limited.
TI recommends a 1-kΩ resistor and 600-V, 0.2-A diode for the GND network.