U4793B Overload Monitoring with Resistive Load, VT = 44.5 mV Description The IC U4793B in bipolar circuit, is designed to monitor overload or a short circuit in automotive or industrial applications. The threshold is tied to V4,6 = VS – VT whereas VT = 44.5 mV. It is independent of the supply voltage, VS. If the voltage drop across shunt resistor, Rsh, exceeds this value, the output is turned on, otherwise the output is turned off. Without supply voltage or open input Pin 8, the output is turned off. The output breakdown voltage is determined by the Z-diodes Z3 and Z5 with a typical value of VZ = 22 V. A not used comparator input must be connected to Pin 7. Features D D D D D D Interference and damage–protection 10 kV – ESD protection according to VDE 0839 Two comparators with common reference Tight threshold tolerance D EMI protection Constant threshold D Reversal polarity protection NPN output D Load-dump protection Ordering Information Extended Type Number U4793B U4793B–FP Package DIP8 SO8 Remarks Block Diagram VS VBatt 2 Rsh 7 Z2 + – 4 Rsh 5 OUT1 3 OUT2 & Z5 0.6 VS – + 8 + – & 6 Z3 1 Load R1 150 W 95 10608 Figure 1. Schematic and application circuit TELEFUNKEN Semiconductors Rev. A2, 06-Mar-97 1 (5) U4793B Pin Description GND 1 8 Input switch VS 2 7 VRef OUT2 3 6 IN2 IN1 4 5 OUT1 Pin 1 2 3 4 5 6 7 8 Symbol GND VS OUT2 IN1 OUT1 IN2 VRef Input Function Reference point, ground Supply voltage Output 2 Input 1 Output 1 Input 2 Reference voltage Input switch 95 10634 Absolute Maximum Ratings Parameters Supply voltage Current consumption t = 2 ms, measured at Pin 1 (GND) Output current Input voltage reference point Pin 7 Power dissipation DIP 8 Tamb = 95 °C SO 8 Tamb = 60 °C DIP 8 SO 8 Ambient temperature range Storage temperature range Junction temperature Pin 2, 7 Pin 1 Pin 3, 5 Pin 4, 6 Symbol VS Value 16.5 Unit V I1 I3,5 1.5 20 A mA –V4,6 6 V Ptot mW Tamb Tstg Tj 420 360 690 560 –40 to +95 –55 to +125 150 Symbol RthJA RthJA Value 110 160 Unit K/W K/W Ptot mW °C °C °C Thermal Resistance Parameters Junction ambient 2 (5) DIP8 SO8 TELEFUNKEN Semiconductors Rev. A2, 06-Mar-97 U4793B Electrical Characteristics VS = 9 to 15 V, Tamb = –40 to +95 °C, figure 1, unless otherwise specified Parameters Supply voltage Internal Z-diode Z2 Current consumption Test Conditions / Pin Pin 2,7 Pin 2 VS = 12 V Pin 1 measured at Pin 1 (GND) VS = 9 V, I3,5 = 10 mA Pin 3,5 Tamb = 25 °C Pin 3,5 I3,5 = 1 mA, figure 3 Pin 4,6 Tamb = 25°C Output saturation voltage Output Z-diodes Z3, Z5 Control signal threshold Temperature coefficient of control signal threshold Threshold voltage Input currents Switch identification Pin 8 Pin 4,6 Delay time Symbol VS VZ I1 Min 9 20 Vsat VZ 21 –VT 43 Max 15 4.5 6 44.5 Unit V V mA 0.5 V V 46 mV 15 0.6 VS 100 mV/K 5 mA td(on) 6 ms td(off) 30 ms TC V8 II Pin 8 Pin 3,5 Switch-on High to low Switch-off Low to high Typ V4,6 (V) 12.00 48 11.90 46 V nA V0 (V) td(off) td(on) – VT (mV) 47 Tamb = 95 °C 45 25 °C 44 –40 °C 43 12 42 6 41 0 10 20 30 t 40 50 60 40 (ms) 95 10615 6 13308 Figure 2. Timing diagram TELEFUNKEN Semiconductors Rev. A2, 06-Mar-97 7 8 9 10 11 12 13 14 15 16 VBatt (V) Figure 3. Threshold voltage = f (VBatt and temperature) 3 (5) U4793B Package Information Package DIP8 Dimensions in mm 7.77 7.47 9.8 9.5 1.64 1.44 4.8 max 6.4 max 0.5 min 0.58 0.48 3.3 0.36 max 9.8 8.2 2.54 7.62 8 5 technical drawings according to DIN specifications 13021 1 4 Package SO8 Dimensions in mm 5.2 4.8 5.00 4.85 3.7 1.4 0.25 0.10 0.4 1.27 6.15 5.85 3.81 8 0.2 3.8 5 technical drawings according to DIN specifications 13034 8 4 (5) 5 TELEFUNKEN Semiconductors Rev. A2, 06-Mar-97 U4793B Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423 TELEFUNKEN Semiconductors Rev. A2, 06-Mar-97 5 (5)