U4793B ATMEL | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 6

Technical content

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 V 4,6 = VS - VT where VT = 44.5 mV. It is independent of the supply voltage, V S. If the voltage drop across shunt resistor, R sh, 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 break- down voltage is determined by the Z-diodes Z3 and Z5 with a typical value of VZ =2 2V . An unused comparator input must be connected to Pin 7. Block Diagram Figure 1. Schematic and Application Circuit

2 U4793B

Figure 2. Pinning DIP8/SO8

1 GND Reference point, ground

2 VS Supply voltage

3 OUT2 Output 2

4 IN1 Input 1

5 OUT1 Output 1

6 IN2 Input 2

7 VRef Reference voltage

8 Input switch Input switch

4557A–AUTO–11/02

Electrical Characteristics

VS = 9 V to 15 V, Tamb = -40/g176C to +125/g176C, unless otherwise specified (see Figure 1) No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*

1 Supply

1.1 Supply voltage 2, 7 V S 91 5 V A

1.2 Internal Z-diode Z 2 2V Z 20 V A

1.3 Current consumption VS = 12 V measured Tamb = -40/g176C 1 I1 3.5 4.8 6.0 mA C

1.4 V S = 12 V measured

Tamb = 25/g176C 1 I1 2.8 3.4 6.0 mA A

1.5 V S = 12 V measured

Tamb = 125/g176C 1 I1 2.0 2.6 3.2 mA C

2 Output

2.1 Output saturation

VS = 9 V, I3,5 = 10 mA Tamb = 25/g176C 3, 5 Vsat 0.5 V A

2.2 Output Z-diodes Z 3,

3, 5 VZ 21 V A

3 Control Signal

3.1 Control signal threshold I3,5 = 1 mA, figure 3 Tamb = -40/g176C 4, 6 -VT 42 44 46 mV C

3.2 I 3,5 = 1 mA, figure 3

Tamb = 25/g176C 4, 6 -VT 43 44.5 46 mV A

3.3 I 3,5 = 1 mA, figure 3

Tamb = 125/g176C 4, 6 -VT 44.5 46 47.5 mV C

3.4 Temperature

TC 15 µV/K C

3.5 Input currents

T amb = -40/g176C 4, 6 II 100 190 nA C

3.6 T amb = 25/g176CI I 60 100 150 nA A

3.7 T amb = 125/g176CI I 30 110 nA C

3.8 Input currents

T amb = -40/g176C II 5.5 7.0 µA C 3.9 T amb = 25/g176CI I 4.0 5.0 5.5 µA A 3.10 T amb = 125/g176CI I 3.0 4.5 µA C 4T h r e s h o l d 4.1 Threshold voltage Switch identification Tamb = -40/g176C 0.47 /g180/g32 VS 0.69 /g180/g32 VS VC

4.2 Switch identification

Tamb = 25/g176C V8 0.47 /g180/g32 VS 0.6 VS 0.69 /g180/g32 VS VA

4.3 Switch identification

Tamb = 125/g176C V8 0.47 /g180/g32 VS 0.69 /g180/g32 VS VC *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

4 U4793B

Figure 3. Timing Diagram Figure 4. Threshold Voltage = f (VBatt and Temperature)

5.1 Delay time

5.2 Tamb = 25/g176C td(on) 4 6 8 µs C

5.3 Tamb = 125/g176C td(on) 5 7 9 µs C

5.4 Delay time

5.5 Tamb = 25/g176C td(off) 18 30 50 µs A

5.6 Tamb = 125/g176C td(off) 30 50 70 µs C

4557A–AUTO–11/02

Package Information

Ordering Information

Extended Type Number Package Remarks U4793B DIP8 – U4793B-FP SO8 – 9.8 9.5 Dimensions in mm 1.64 1.44 4.8 max 0.5 min 3.3 0.58 0.48 7.62 2.54 6.4 max 0.36 max 9.8 8.2 7.77 7.47 technical drawings according to DIN specifications technical drawings according to DIN specifications Dimensions in mm 5.00 4.85 0.4 1.27 3.81 1.4 0.25 0.10 5.2 4.8 3.7 3.8 6.15 5.85 0.2

Printed on recycled paper. © 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 de vices or specifications detailed herein at any time without n otice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of At mel are granted by the Company in connection with the sale of Atmel products, ex pressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Atmel Headquarters Atmel Operations Corporate Headquarters

2325 Orchard Parkway

San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 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 Tsimhatsui

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 Memory San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 Microcontrollers San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602

44306 Nantes Cedex 3, France

13106 Rousset Cedex, France

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 RF/Automotive Theresienstrasse 2 Postfach 3535

74025 Heilbronn, Germany

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 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123

38521 Saint-Egreve Cedex, France

literature@atmel.com Web Site http://www.atmel.com 4557A–AUTO–11/02 xM Atmel ® is the registered trademark of Atmel. Other terms and product names may be the trademarks of others.