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| -Hall-Effect IC; (PSI: Protected-Precision-Siemens-Hall-IC) Highly Accurate, Protected Hall-Effect IC Preliminary Data Features q q q q q q q q q q TLE 4904; TLE 4934; TLE 4944 Bipolar-IC Active Piezo compensation Digital output signal For unipolar and bipolar magnetic fields Large temperature range High temperature stability High switching accuracy Protection against overvoltage and short circuit Protection against reversed polarity Output protection against electrical disturbances Temperature compensated magnetic perfomance P-SSO- 3-4 Type w TLE 4904 w TLE 4934 w TLE 4944 w New type Ordering Code Q67006-A9011 Q67006-A9027 Q67006-A9028 Package P-SSO-3-4 P-SSO-3-4 P-SSO-3-4 TLE 4904 (Unipolar Magnetic Fields - Switch) and the TLE 4934, TLE 4944 (Bipolar Magnetic Fields-Latch/Switch) are integrated circuit Hall sensors designed specifically for high end automotive and industrial electronics. Precise switching points and high temperature stability are achieved by adjustment temperature and active compensation on chip. These Hall effect integrated circuits include protection for overvoltage, reversed polarity and electrical overstress such as load dump, etc., in accordance with ISO-TR 7637 (DIN 40 839) and short circuit of the output. TLE 4904; TLE 4934; TLE 4944 Pin Configuration (top view) Pin Definition and Functions Pin 1 2 3 Symbol Function Supply voltage Ground Output VS GND Q TLE 4904; TLE 4934; TLE 4944 Circuit Description The circuit includes Hall generator, amplifier and comperator with hysteresis on one chip. The internal reference provides the supply voltage for the components. A magnetic field perpendicular to the chip surface induces a voltage at the hall probe. This voltage is amplified and switches a comparator with open-drain output. The switching points are adjusted to achieve high accuracy. The active offset compensation eliminates internal and external offsets (mechanical stress) by switching of the hall element. The built-in temperature compensation fits to regular magnet system. Protection is provided at the input/supply (pin 1) for overvoltage and reverse polarity, against overstress such as load dump, etc., in accordance with ISO-TR 7637 (DIN 40839). The output (pin 3) is protected against voltage peaks and short circuit. Figure 1 Block Diagram TLE 4904; TLE 4934; TLE 4944 Functional Description When a positive magnetic field is applied in the indicated direction (figure 2) and the turn-ON magnetic induction BOP is exceeded, the output of the Hall-effect IC will conduct (Operate Point). When the current is reduced (TLE 4904) or a reverse magnetic field is generated (TLE 4934, TLE 4944), the output of the IC turns OFF (Release Point) (figures 3 and 4). BRP and BOP are the critical parameters in most unipolar and bipolar Hall-switch applications. For this reason the switching points are adjusted. Figure 2 Sensor/Magnetic-Field Configuration TLE 4904; TLE 4934; TLE 4944 Figure 3 Switching Characteristics TLE 4904 Figure 4 Switching Characteristics TLE 4934, TLE 4944 TLE 4904; TLE 4934; TLE 4944 Absolute Maximum Ratings TA = - 40 to 125 C Parameter Supply voltage Output voltage Output short circuit current Output thermal protection Junction temperature Junction temperature Junction temperature Storage temperature Thermal resistance Current through inputprotection device Current through outputprotection device Operating Range Supply voltage Junction temperature Junction temperature Symbol Limit Values min. max. 28 28 150 200 165 150 170 210 150 190 200 200 V V mA C C C C C C K/W mA mA - - - - - 1000 h 40 h - - - 40 - - 170 135 - 40 - - - 40 - - 200 - 200 Unit Remarks VDD VQ IQ Tj OFF Tj ON Tj Tj Tj Tstg Rth JA IDDZ IQZ t < 2 ms; v = 0.1 t < 2 ms; v = 0.1 VS Tj Tj 3.8 - 40 - 40 24 150 170 V C C - - threshold may exceed the limits TLE 4904; TLE 4934; TLE 4944 AC/DC Characteristics 4.5 V VDD 24 V; - 40 C Tj 150 C Parameter Supply current Symbol Limit Values min. typ. 1.5 1.5 0.25 - 31 31 50 max. 3 3 0.6 10 - - 75 mA mA V A V V s B < BRP B > BOP - - - - 28 28 Unit Test Condition Test Circuit 1 1 2 2 IS IS IQL VSZ VQZ Output saturation voltage VQSat Output leakage current Overvoltage protection -at supply voltage -at output Delay time IQ = 40 mA VQ = 24 V IS = 10 mA, 25 C 2 IQ = 10 mA, 25 C 2 - 1 tdHL / tdLH - Magnetic Characteristics 3.8 V VDD 24 V Parameter Symbol -40 C min. TLE 4904 typ. max. min. Limit Values 25 C typ. max. min. 150 C typ. max. Unit TC = - 0.04 %/C BOP BRP BHy TLE 4934 TC = - 0.2 %/C 9.2 5.1 4.1 10.8 6.2 4.6 12.3 7.2 5.1 9 5 4 10.5 6 4.5 12 7 5 8.5 4.7 3.8 10 5.7 4.3 11.4 6.7 4.8 mT mT mT BOP BRP BHy TLE 4944 TC = - 0.2 %/C 11.9 11.9 13.6 9 -13.6 -11.9 -10.2 -12 21.4 23.8 26.2 19 10.5 12 -10.5 -9 21 23 6.7 -9 14.2 7.9 -7.9 15.8 9 -6.7 17.4 mT mT mT BOP BRP BHy 3.9 -6.2 9.2 5.1 -5.1 10.2 6.2 -3.9 11.2 3.5 -5.5 8 4.5 -4.5 9 5.5 -3.5 10 2.6 -4.1 6.1 3.4 -3.4 6.8 4.1 -2.6 7.5 mT mT mT TLE 4904; TLE 4934; TLE 4944 Figure 5 Test Circuit 1 Figure 6 Test Circuit 2 TLE 4904; TLE 4934; TLE 4944 Figure 7 Diagram Figure 8 Application Circuit |
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