Atmel U4793B Current Monitor IC DATASHEET Features 10kV - 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 Atmel(R) 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 = 44.5mV. 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. 4557C-AUTO-06/12 1. Block Diagram Figure 1-1. Schematic and Application Circuit VS V Batt 2 Rsh 7 Z2 5 + - 4 OUT1 & Z5 0.6 VS Rsh + 8 3 + - OUT2 & 6 Z3 1 2. 150 R1 Load Pin Configuration Figure 2-1. Pinning SO8 GND VS OUT2 IN1 Table 2-1. 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 Atmel U4793B [DATASHEET] 4557C-AUTO-06/12 2 3. 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 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 = 125C Tamb = 95C Tamb = 60C Ptot Ptot Ptot 150 360 560 mW 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 160 K/W Supply voltage; pins 2 and 7 Input voltage reference point pin 7, pins 4 and 6 Junction temperature 4. Thermal Resistance Parameters Junction ambient 5. Electrical Characteristics VS = 9V to 15V, Tamb = -40C to +125C, unless otherwise specified (see Figure 1-1 on page 2) No. 1 Parameters Supply voltage 1.2 Internal Z-diode Z2 1.3 1.5 Pin Symbol Min. Typ. Max. Unit Type* 2, 7 VS 9 15 V A 2 VZ 20 V A VS = 12V measured Tamb = -40C 1 I1 3.5 4.8 6.0 mA C VS = 12V measured Tamb = 25C 1 I1 2.8 3.4 6.0 mA A VS = 12V measured Tamb = 125C 1 I1 2.0 2.6 3.2 mA C Supply 1.1 1.4 Test Conditions Current consumption *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Atmel U4793B [DATASHEET] 4557C-AUTO-06/12 3 5. Electrical Characteristics (Continued) VS = 9V to 15V, Tamb = -40C to +125C, unless otherwise specified (see Figure 1-1 on page 2) 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 5.1 5.2 5.3 5.4 5.5 5.6 3, 5 Vsat 3, 5 VZ 21 I3,5 = 1mA, Figure 5-1 Tamb = -40C 4, 6 -VT 42 44 I3,5 = 1mA, Figure 5-1 Tamb = 25C 4, 6 -VT 43 I3,5 = 1mA, Figure 5-1 Tamb = 125C 4, 6 -VT 44.5 Min. TC Input currents Pins connected to 12V Tamb = -40C Input currents Pins connected to 12V Tamb = -40C Typ. Max. Unit Type* 0.5 V A V A 46 mV C 44.5 46 mV A 46 47.5 mV C V/K C 190 nA C 150 nA A 110 nA C 7.0 A C 5.5 A A 15 II 100 II 60 II 30 II 5.5 II 4.0 Tamb = 125C II 3.0 4.5 A C Switch identification Tamb = -40C V8 0.47 x VS 0.69 x VS V C V8 0.47 x VS 0.69 x VS V A V8 0.47 x VS 0.69 x VS V C Tamb = -40C td(on) 3 4 6 s C Tamb = 25C td(on) 4 6 8 s C Tamb = 125C td(on) 5 7 9 s C td(off) 16 24 32 s C Tamb = 25C td(off) 18 30 50 s A Tamb = 125C td(off) 30 50 70 s C Tamb = 25C 4, 6 Tamb = 125C Tamb = 25C 8 100 5.0 Threshold Threshold voltage Switch identification Tamb = 25C 8 Switch identification Tamb = 125C 4.3 5 VS = 9V, I3,5 = 10mA Tamb = 25C 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 = 10k connected from Pin 3 or Pin 5 to VBatt) Delay time Switch-on High to low Delay time Switch-off Low to high Tamb = -40C 3, 5 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Atmel U4793B [DATASHEET] 4557C-AUTO-06/12 4 Figure 5-1. 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 (ms) Figure 5-2. Threshold Voltage = f (VBatt and Temperature) -V T (mV) 48 47 Tamb = 125C 46 95C 45 25C 44 -40C 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) Atmel U4793B [DATASHEET] 4557C-AUTO-06/12 5 Ordering Information Extended Type Number Package U4793B-MFPY Remarks Tube, Pb-free Package Information Figure 7-1. SO8 Package: SO 8 Dimensions in mm 50.2 4.90.1 3.70.1 1.4 0.1+0.15 7. SO8 0.2 6. 0.4 1.27 3.80.1 60.2 3.81 8 5 technical drawings according to DIN specifications 1 4 Drawing-No.: 6.541-5031.01-4 Issue: 1; 15.08.06 Atmel U4793B [DATASHEET] 4557C-AUTO-06/12 6 8. 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 * Section 4 "Absolute Maximum Ratings" on page 3 changed 4557C-AUTO-06/12 * Section 5 "Thermal Resistance" on page 3 changed * Section 7 "Ordering Information" on page 6 changed * Section 8 "Package Information" on page 6 changed * Put datasheet in a new template 4557B-AUTO-09/05 * Pb-free logo on page 1 added * Ordering Information on page 6 changed Atmel U4793B [DATASHEET] 4557C-AUTO-06/12 7 Atmel Corporation 2325 Orchard Parkway Atmel Asia Limited Unit 01-5 & 16, 19F Atmel Munich GmbH Business Campus Atmel Japan G.K. 16F Shin-Osaki Kangyo Building San Jose, CA 95131 BEA Tower, Millennium City 5 Parkring 4 1-6-4 Osaki USA 418 Kwun Tong Roa D-85748 Garching b. Munich Shinagawa-ku, Tokyo 141-0032 Tel: (+1) (408) 441-0311 Kwun Tong, Kowloon GERMANY JAPAN Fax: (+1) (408) 487-2600 HONG KONG Tel: (+49) 89-31970-0 Tel: (+81) (3) 6417-0300 www.atmel.com Tel: (+852) 2245-6100 Fax: (+49) 89-3194621 Fax: (+81) (3) 6417-0370 Fax: (+852) 2722-1369 (c) 2012 Atmel Corporation. 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