ZHCSIG2A July 2018 – August 2018 TLC6C5716-Q1
PRODUCTION DATA.
To protect the device from reference resistor short and open faults, the device integrates IREF short and open protection. In an IREF short or open fault condition, the device reports the fault and sets the output current to a default value to help improve the system safety.
By default, the ISF and IOF flags are 0. When the IREF current exceeds the fault detection threshold, the ERR pin is pulled down, the ISF or IOF flag is set to 1, and the error flag and ERR pin status stay unchanged until the fault is removed and there is an ERROR clear command.
Once there is an ISF or IOF failure, the output current is set to a default value, and I(OUT)max is 10 mA; see Table 11. Once the ISF or IOF failure is removed, the output current returns back to the set IREF value immediately.
IIREF | ISF | IOF | OUTPUT |
---|---|---|---|
IIREF ≤ 10 µA | 0 | 1 | I(OUT)max= 10 mA |
10 µA < IIREF ≤ 3 mA | 0 | 0 | I(OUT)max = VIREF × 40 / RIREF |
IIREF > 3 mA | 1 | 0 | I(OUT)max = 10 mA |