U4793B_05 ATMEL | Alldatasheet
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- 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 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, 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 = 22V. An unused comparator input must be connected to pin 7. 2. Block Diagram Figure 2-1. Schematic and Application Circuit 2 7 R1 150 Ω VS VBatt Rsh Rsh Load 0.6 VS OUT1 OUT2 Z 5 Z 3 Current Monitor IC U4793B Rev. 4557B–AUTO–09/05
4557B–AUTO–09/05 U4793B 3. Pin Configuration Figure 3-1. Pinning DIP8/SO8 GND VS OUT2 IN1 Input switch VRef IN2 OUT1 Table 3-1. Pin Description Pin Symbol Function
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
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 V S 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 I 3,5 20 mA Input voltage reference point pin 7, pins 4 and 6 –V 4,6 6V 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 T amb –40 to +125 °C Storage temperature range T stg –55 to +125 °C Junction temperature T j 150 °C 5. Thermal Resistance Parameters Symbol Value Unit Junction ambient DIP8 SO8 R thJA RthJA 110 160 K/W K/W 6. Electrical Characteristics VS = 9V to 15V, Tamb = –40°C to +125°C, unless otherwise specified (see Figure 2-1 on page 1) No. Parameters Test Conditions Pi n 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 = 12V measured Tamb = –40°C 1I 1 3.5 4.8 6.0 mA C
1.4 VS = 12V measured
Tamb = 25°C 1I 1 2.8 3.4 6.0 mA A
1.5 VS = 12V measured
Tamb = 125°C 1I 1 2.0 2.6 3.2 mA C *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
4557B–AUTO–09/05 U4793B
2 Output
2.1 Output saturation
VS = 9V, I3,5 = 10 mA Tamb = 25°C 3, 5 V sat 0.5 V A
2.2 Output Z-diodes Z 3, Z5 3, 5 V Z 21 V A
3 Control Signal
3.1 Control signal threshold I3,5 = 1 mA, Figure 6-1 Tamb = –40°C 4, 6 –V T 42 44 46 mV C
3.2 I3,5 = 1 mA, Figure 6-1
Tamb = 25°C 4, 6 –V T 43 44.5 46 mV A
3.3 I3,5 = 1 mA, Figure 6-1
Tamb = 125°C 4, 6 –V T 44.5 46 47.5 mV C 3.4 Temperature coefficient of control signal threshold TC 15 µV/K C
3.5 Input currents
Tamb = –40°C 4, 6 II 100 190 nA C
3.6 T amb = 25°C I I 60 100 150 nA A
3.7 T amb = 125°C I I 30 110 nA C
3.8 Input currents
Tamb = –40°C II 5.5 7.0 µA C 3.9 T amb = 25°C I I 4.0 5.0 5.5 µA A 3.10 T amb = 125°C I I 3.0 4.5 µA C
4 Threshold
4.1 Threshold voltage Switch identification Tamb = –40°C 0.47 × VS 0.69 × VS VC
4.2 Switch identification
Tamb = 25°C V8 0.47 × VS 0.6 VS 0.69 × VS VA
4.3 Switch identification
Tamb = 125°C V8 0.47 × VS 0.69 × VS VC 5S w i t c h D e l a y ( RL = 10 kΩ connected from Pin 3 or Pin 5 to VBatt)
5.1 Delay time
Tamb = –40°C 3, 5 td(on) 346 µ s C
5.2 T amb = 25°C t d(on) 468 µ s C
5.3 T amb = 125°C t d(on) 579 µ s C
5.4 Delay time
Tamb = –40°C t d(off) 16 24 32 µs C
5.5 T amb = 25°C t d(off) 18 30 50 µs A
5.6 T amb = 125°C t d(off) 30 50 70 µs C
- Electrical Characteristics (Continued) VS = 9V to 15V, Tamb = –40°C to +125°C, unless otherwise specified (see Figure 2-1 on page 1) No. Parameters Test Conditions Pi n Symbol Min. Typ. Max. Unit Type* *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
4557B–AUTO–09/05 U4793B 8. Package Information 7. Ordering Information Extended Type Number Package Remarks U4793B-MY DIP8 Tube, Pb-free U4793B-MFPY SO8 Tube, Pb-free U4793B-MFPG3Y SO8 Taped and reeled, Pb-free 9.8 9.5 Dimensions i n 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
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
Printed on recycled paper. 4557B–AUTO–09/05 © Atmel Corporation 2005 . All rights reserved. Atmel ®, logo and combinations thereof, Everywhere Y ou Are ® and others, are registered trade- marks or trademarks of Atmel Corporation or its subsidiari es. Other terms and product names may be trademarks of others. Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL ’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL ’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTOR Y WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICU LAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR I NCIDEN- TAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF AT MEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the ri ght to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained her ein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not int ended, authorized, or warranted for use as components in applications intended to support or sustain life. Atmel Corporation Atmel Operations
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