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TLC59291 Arkusz danych(PDF) 26 Page - Texas Instruments |
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TLC59291 Arkusz danych(HTML) 26 Page - Texas Instruments |
26 / 45 page TLC59291 SLVSA96 – SEPTEMBER 2015 www.ti.com 8.3.5 Current Reference Terminal – IREF Terminal - Short Flag (ISF) The ISF function indicates that IREF terminal is short to GND with low impedance. When IREF is set, all OLD data bit is set to “1”. Then all outputs (OUTn) are forced off and remain off until the short is removed. Table 3 shows the truth table for ISF. Table 3. TEF/PTW/ISF Truth Table CORRESPONDING DATA BITS TEF PTW ISF IN SID Device temperature is lower than Device temperature is lower than high-side detect temperature pre-thermal warning temperature IREF terminal is not shorted Depends on LOD/LSD/OLD (temperature ≤ TTEF) (temperature ≤ TPTW) Device temperature is higher Device temperature is higher IREF terminal is shorted to GND SID is all 1s for TEF when SIDLD than high-side detect than pre-thermal warning with low impedance and all bit = '01'. SID is all 1s for PTW temperature and all outputs are temperature outputs (OUT0 to OUT15) are when SIDLD = '10'. SID is all 1s forced off (temperature >TTEF) (temperature > TPTW) forced off for ISF when SIDLD = '11'. 8.3.6 Noise Reduction Large surge currents may flow through the IC and the board on which the device is mounted if all 16 outputs turn on simultaneously when BLANK goes low or on-off data changes at LAT rising edge with BLANK low. These large current surges could induce detrimental noise and electromagnetic interference (EMI) into other circuits. The TLC59291 turns the outputs on in 2ns series delay for each output to provide a circuit soft-start feature. 26 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TLC59291 |
Podobny numer części - TLC59291_15 |
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Podobny opis - TLC59291_15 |
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