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| 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 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 = 22 V. An unused comparator input must be connected to Pin 7. Current Monitor IC U4793B Block Diagram Figure 1. Schematic and Application Circuit VS 2 R sh Z 2 + 0.6 VS + 8 3 & Z3 1 Load R1 & Z5 7 V Batt 5 OUT1 4 R sh + 6 OUT2 150 W Rev. 4557A-AUTO-11/02 1 Pin Configuration Figure 2. Pinning DIP8/SO8 GND VS OUT2 IN1 1 2 3 4 8 7 6 5 Input switch VRef IN2 OUT1 Pin Description Pin 1 2 3 4 5 6 7 8 Symbol GND VS OUT2 IN1 OUT1 IN2 VRef Input switch Function Reference point, ground Supply voltage Output 2 Input 1 Output 1 Input 2 Reference voltage Input switch Absolute Maximum Ratings Parameters Supply voltage Pin 2, 7 Current consumption t = 2 ms, measured at Pin 1 (GND) Pin 1 Output current Pin 3, 5 Input voltage reference point Pin 7 Pin 4, 6 Power dissipation Tamb = 125C,DIP8 SO8 Tamb = 95C, DIP8 SO8 Tamb = 60C, DIP8 SO8 Ambient temperature range Storage temperature range Junction temperature Symbol VS Value 16.5 Unit V I1 I3,5 1.5 20 A mA -V4,6 Ptot Ptot Ptot Tamb Tstg Tj 6 220 150 420 360 690 560 -40 to +125 -55 to +125 150 V mW mW mW mW mW mW C C C Thermal Resistance Parameters Junction ambient DIP8 SO8 Symbol RthJA RthJA Value 110 160 Unit K/W K/W 2 U4793B 4557A-AUTO-11/02 U4793B Electrical Characteristics VS = 9 V to 15 V, Tamb = -40C to +125C, unless otherwise specified (see Figure 1) No. 1 1.1 1.2 1.3 1.4 1.5 2 2.1 2.2 3 3.1 3.2 3.3 3.4 Temperature coefficient of control signal threshold Input currents Pins connected to 12 V Input currents Pins connected to 12 V Threshold Switch identification Tamb = -40C Threshold voltage Switch identification Tamb = 25C Switch identification Tamb = 125C 8 V8 V8 V8 0.47 VS 0.47 VS 0.47 VS 0.6 VS 0.69 VS 0.69 VS 0.69 VS V V V C A C Tamb = -40C Tamb = 25C Tamb = 125C Tamb = -40C Tamb = 25C Tamb = 125C 8 4, 6 Control signal threshold Output Output saturation voltage Output Z-diodes Z3, Z5 Control Signal I3,5 = 1 mA, figure 3 Tamb = -40C I3,5 = 1 mA, figure 3 Tamb = 25C I3,5 = 1 mA, figure 3 Tamb = 125C 4, 6 4, 6 4, 6 VS = 9 V, I3,5 = 10 mA Tamb = 25C 3, 5 3, 5 Parameters Supply Supply voltage Internal Z-diode Z2 VS = 12 V measured Tamb = -40C Current consumption VS = 12 V measured Tamb = 25C VS = 12 V measured Tamb = 125C 2, 7 2 1 1 1 VS VZ I1 I1 I1 9 20 3.5 2.8 2.0 4.8 3.4 2.6 6.0 6.0 3.2 15 V V mA mA mA A A C A C Test Conditions Pin Symbol Min. Typ. Max. Unit Type* Vsat VZ 21 0.5 V A V A -VT -VT -VT TC II II II II II II 42 43 44.5 44 44.5 46 46 46 47.5 mV mV mV C A C 15 100 60 30 5.5 4.0 3.0 5.0 100 190 150 110 7.0 5.5 4.5 V/K nA nA nA A A A C C A C C A C 3.5 3.6 3.7 3.8 3.9 3.10 4 4.1 4.2 4.3 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 3 4557A-AUTO-11/02 Electrical Characteristics (Continued) VS = 9 V to 15 V, Tamb = -40C to +125C, unless otherwise specified (see Figure 1) No. 5 5.1 5.2 5.3 5.4 5.5 5.6 Parameters Test Conditions Tamb = -40C Tamb = 25C Tamb = 125C Tamb = -40C Tamb = 25C Tamb = 125C 3, 5 Pin Symbol Min. 3 4 5 16 18 30 Typ. Max. 6 8 9 32 50 70 Unit Type* C C C C A C Switch Delay (RL = 10 kW connected from Pin 3 or Pin 5 to VBatt) Delay time Switch-on High to low Delay time Switch-off Low to high td(on) td(on) td(on) td(off) td(off) td(off) 4 6 7 24 30 50 s s s s s s *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Figure 3. Timing Diagram V 4,6 (V) 12.00 11.90 V0 (V) 12 6 0 10 20 t d(off) t d(on) 30 40 50 60 t (ms) Figure 4. Threshold Voltage = f (VBatt and Temperature) 48 47 46 45 Tamb = 125C 95C 25C -40C -V T ( mV ) 44 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 ) 4 U4793B 4557A-AUTO-11/02 U4793B Ordering Information Extended Type Number U4793B U4793B-FP Package DIP8 SO8 Remarks - - Package Information Package DIP8 Dimensions in mm 9.8 9.5 1.64 1.44 7.77 7.47 4.8 max 6.4 max 0.5 min 3.3 0.58 0.48 7.62 8 5 2.54 0.36 max 9.8 8.2 technical drawings according to DIN specifications 1 4 Package SO8 Dimensions in mm 5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 5.2 4.8 3.7 0.2 3.8 6.15 5.85 technical drawings according to DIN specifications 1 4 5 4557A-AUTO-11/02 Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131 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 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1(719) 576-3300 FAX 1(719) 540-1759 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 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 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France TEL (33) 4-76-58-30-00 FAX (33) 4-76-58-34-80 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4-42-53-60-00 FAX (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1(719) 576-3300 FAX 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland TEL (44) 1355-803-000 FAX (44) 1355-242-743 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 literature@atmel.com Web Site http://www.atmel.com (c) Atmel Corporation 2002. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems. Atmel (R) is the registered trademark of Atmel. Other terms and product names may be the trademarks of others. Printed on recycled paper. 4557A-AUTO-11/02 xM |
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