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LP8866S-Q1 Datasheet(PDF) 38 Page - Texas Instruments |
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LP8866S-Q1 Datasheet(HTML) 38 Page - Texas Instruments |
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38 / 82 page  Table 7-9. Fault and Protection Schemes (continued) FAULT NAME STATUS BIT CONDITION TRIGGER FAULT INTERRUPT ENTER FAULT RECOVERY ACTION ISET resistor fault ISET_STATUS ISET pin voltage is pulled down to below 1V due to ISET pin resistor shorted to GND Yes No LED_CURRENT[11:0] is written to 0x3FF. Total LED current limited to 70 mA. Thermal shutdown TSD_STATUS Junction temperature rises above TSD threshold. Yes Yes Device goes to standby and then attempts to restart once die temperature falls below threshold. Open LED string LED_STATUS OPEN_LED Headroom voltage on one or more channels is below minimum level and boost has adapted to maximum level. Yes No Faulted LED string is disabled and removed from adaptive boost control loop. String is re-enabled next power cycle. LED internal short LED_STATUS_SHORT_L ED Headroom voltage on one or more channels is above the SHORTED_LED_THRESHOLD for > 5 ms while the headroom of at least one channel is still below this threshold. Yes No Faulted LED string is disabled and removed from adaptive boost control loop. String is re-enabled next power cycle. LED short to GND LED_STATUS_GND_LE D During PL FET SOFT START, voltage of one or more used LED output is below VHEADROOM when small test current is injected. In BOOST_SU and Normal Stage, voltage of one or more used LED output is below VSHORTGND.and keeps still when the corresponding channel is off and small test current is injected. Yes Yes Device goes to Fault Recovery and then attempts to restart 100 ms after fault occurs. Invalid LED string detected INVSTRING_STATUS Configured unused LED output is detected not short to GND. Yes No Device functions normally, if possible. I2C timeout I2C_ERROR_STATUS Device receives I2C command without STOP signal for 500 ms. Yes No Device functions normally and waits for the next I2C command. LP8866S-Q1 SNVSBD1A – AUGUST 2020 – REVISED FEBRUARY 2021 www.ti.com 38 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: LP8866S-Q1 |
Similar Part No. - LP8866S-Q1_V01 |
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Similar Description - LP8866S-Q1_V01 |
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