JAJSKF6C November 2020 – December 2021 TPS2661
PRODUCTION DATA
TPS26612 can be used for protection of power supply powering a two wire field transmitter as shown in Figure 9-11. Connect an external signal diode (D1) from IN to +Vs pin of TPS26612 in case of external field supply to protect the system from miswiring. In case the supply is internal to the module and miswiring is not a possibility, the signal diode (D1) is not needed. TPS26612 device includes higher threshold for overvoltage protection on OUT to accommodate the voltage drop of diode (D1) between IN and +Vs.
TPS26612 has over-load expiry time (tOL_expiry) disabled for the first overload fault after power-up up to a duration of tAR_dis (5 sec). With overload expiry time disabled, TPS26612 is able to power up 2-wire transmitters requiring higher start-up for longer durations (up to 5 sec.). The current limit threshold (IOL or 2 x IOL) for startup can be selected by MODE pin.
VIN = 24 V, COUT = 1 mF |
VIN = 24 V, COUT = 1 mF |
During the first overload fault, if the junction temperature reaches TSD, the device turns off the internal FETs and turns on as the junction temperature goes below [TTSD – TTSDHyst].