Features • • • • • • 10 kV – ESD Protection Two Comparators with Common Reference Tight Threshold Tolerance Constant Threshold NPN Output Interference and Damage-protection According to VDE 0839 and ISO/CD 7637 EMI Protection • Reversal Polarity Protection • Load-dump Protection Current Monitor IC U4793B 1. Description The bipolar U4793B is designed to monitor overload or a short circuit in automotive or industrial applications. The threshold is tied to V4,6 = VS – VT where 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 = 22V. An unused comparator input must be connected to pin 7. 2. Block Diagram Figure 2-1. Schematic and Application Circuit VS V Batt 2 R sh 7 Z 2 5 + - 4 OUT1 & Z5 0.6 VS R sh + 8 3 + - OUT2 & 6 Z3 1 Load R1 150 Ω Rev. 4557B–AUTO–09/05 3. Pin Configuration Figure 3-1. Pinning DIP8/SO8 GND VS OUT2 IN1 Table 3-1. 2 1 2 3 4 8 7 6 5 Input switch VRef IN2 OUT1 Pin Description Pin Symbol 1 GND 2 VS 3 OUT2 4 IN1 5 OUT1 6 IN2 7 VRef 8 Input switch Function Reference point, ground Supply voltage Output 2 Input 1 Output 1 Input 2 Reference voltage Input switch U4793B 4557B–AUTO–09/05 U4793B 4. Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Symbol Value Unit Supply voltage; pins 2 and 7 VS 16.5 V Current consumption t = 2 ms, measured at pin 1 (GND), pin 1 I1 1.5 A Output current, pins 3 and 5 I3,5 20 mA –V4,6 6 V Power dissipation, Tamb = 125°C DIP8 SO8 Ptot 220 150 mW mW Tamb = 95°C DIP8 SO8 Ptot 420 360 mW mW Tamb = 60°C DIP8 SO8 Ptot 690 560 mW mW Ambient temperature range Tamb –40 to +125 °C Storage temperature range Tstg –55 to +125 °C Tj 150 °C Symbol Value Unit RthJA RthJA 110 160 K/W K/W Input voltage reference point pin 7, pins 4 and 6 Junction temperature 5. Thermal Resistance Parameters Junction ambient DIP8 SO8 6. Electrical Characteristics VS = 9V to 15V, Tamb = –40°C to +125°C, unless otherwise specified (see Figure 2-1 on page 1) No. 1 Parameters Pin Symbol Min. 2, 7 VS 9 Typ. Max. Unit Type* 15 V A V A Supply 1.1 Supply voltage 1.2 Internal Z-diode Z2 1.3 1.4 Test Conditions Current consumption 1.5 2 VZ 20 VS = 12V measured Tamb = –40°C 1 I1 3.5 4.8 6.0 mA C VS = 12V measured Tamb = 25°C 1 I1 2.8 3.4 6.0 mA A VS = 12V measured Tamb = 125°C 1 I1 2.0 2.6 3.2 mA C *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 3 4557B–AUTO–09/05 6. Electrical Characteristics (Continued) VS = 9V to 15V, Tamb = –40°C to +125°C, unless otherwise specified (see Figure 2-1 on page 1) No. 2 Parameters Output saturation voltage 2.2 Output Z-diodes Z3, Z5 Control signal threshold 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 4 Input currents Pins connected to 12V Input currents Pins connected to 12V 5.1 5.2 5.3 5.4 5.5 5.6 Min. Typ. Max. Unit Type* 3, 5 Vsat 0.5 V A 3, 5 VZ 21 V A I3,5 = 1 mA, Figure 6-1 Tamb = –40°C 4, 6 –VT 42 44 46 mV C I3,5 = 1 mA, Figure 6-1 Tamb = 25°C 4, 6 –VT 43 44.5 46 mV A I3,5 = 1 mA, Figure 6-1 Tamb = 125°C 4, 6 –VT 44.5 46 47.5 mV C TC µV/K C Tamb = –40°C 190 nA C Tamb = 25°C 4, 6 150 nA A 15 II 100 II 60 100 Tamb = 125°C II 30 110 nA C Tamb = –40°C II 5.5 7.0 µA C II 4.0 5.5 µA A Tamb = 125°C II 3.0 4.5 µA C Switch identification Tamb = –40°C V8 0.47 × VS 0.69 × VS V C V8 0.47 × VS 0.69 × VS V A V8 0.47 × VS 0.69 × VS V C Tamb = 25°C 8 5.0 Threshold Threshold voltage Switch identification Tamb = 25°C 8 Switch identification Tamb = 125°C 4.3 5 VS = 9V, I3,5 = 10 mA Tamb = 25°C Temperature coefficient of control signal threshold 4.1 4.2 Symbol Control Signal 3.1 3.2 Pin Output 2.1 3 Test Conditions 0.6 VS Switch Delay (RL = 10 kΩ connected from Pin 3 or Pin 5 to VBatt) Delay time Switch-on High to low Delay time Switch-off Low to high Tamb = –40°C td(on) 3 4 6 µs C Tamb = 25°C td(on) 4 6 8 µs C td(on) 5 7 9 µs C td(off) 16 24 32 µs C Tamb = 25°C td(off) 18 30 50 µs A Tamb = 125°C td(off) 30 50 70 µs C Tamb = 125°C Tamb = –40°C 3, 5 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 4 U4793B 4557B–AUTO–09/05 U4793B Figure 6-1. Timing Diagram V4,6 (V) 12.00 11.90 V0 (V) t d(off) t d(on) 12 6 0 10 20 30 40 50 60 t (µs) Figure 6-2. Threshold Voltage = f (VBatt and Temperature) -V T ( mV ) 48 47 Tamb = 125°C 46 95°C 45 25°C 44 -40°C 43 42 41 40 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 V Batt ( V ) 5 4557B–AUTO–09/05 7. Ordering Information Extended Type Number Package U4793B-MY Remarks DIP8 Tube, Pb-free U4793B-MFPY SO8 Tube, Pb-free U4793B-MFPG3Y SO8 Taped and reeled, Pb-free 8. Package Information P a c k a g e D IP 8 D im e n s io n s in m m 9 .8 9 .5 1 .6 4 1 .4 4 7 .7 7 7 .4 7 4 .8 m a x 6 .4 m a x 0 .5 m in 0 .5 8 0 .4 8 3 .3 0 .3 6 m a x 9 .8 8 .2 2 .5 4 7 .6 2 8 5 te c h n ic a l d ra w in g s a c c o rd in g to D IN s p e c ific a tio n s 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 1 6 4 U4793B 4557B–AUTO–09/05 U4793B 9. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History 4557B-AUTO-09/05 • Put datasheet in a new template • Pb-free logo on page 1 added • Ordering Information on page 6 changed 7 4557B–AUTO–09/05 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards 1150 East Cheyenne Mtn. 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