Hello,
Please teach me about TPS61199's protection.
Data Sheet P10. and P11.
> 1. Switch current limit protection using the ISNS pin
> The TPS61199 monitors the inductor current through the voltage across a sense resistor (R1 in Figure 1) in
> order to provide current limit protection. During the switch FET on period, when the voltage at ISNS pin rises
> above 160 mV (VISNS in the Electrical Characterization table), the IC turns off the FET immediately and
> does not turn it back on until the next switch cycle. The switch current limit is equal to 160mV / R1.
> 6. Output short to ground protection
> When the inductor peak current reaches twice the switch current limit in each switch cycle, the IC
> immediately disables the boost controller until the fault is cleared. This protects the IC and external
> components from damage if the output is shorted to ground.
[Question]
1) What is the difference between "turns off the FET" and "disable the boost controller" ?
2) What dose that mean "twice" ? x2 or 2-cycle ?
Best Regards,
H.Fujikawa
