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UZXCT1030X8TA

型号：

UZXCT1030X8TA

品牌：

ZETEX[ ZETEX SEMICONDUCTORS ]

页数：

10 页

PDF大小：

226 K

下载PDF手册
ZXCT1030  
High-side current monitor with comparator  
Description  
The ZXCT1030 is a high side current sense The wide input voltage range of 20V down to as  
monitor containing an internal reference and low as 2.2V make it suitable for a range of  
comparator with a non-latching output. Using applications. Dynamics and supply current are  
this device eliminates the need to disrupt the optimized for the processing of fast pulses,  
ground plane when sensing a load current.  
associated with switch mode applications.  
Features  
Applications  
•
•
•
•
•
•
•
Low cost, accurate high-side current sensing  
Output voltage scaling  
Up to 18V output  
•
•
•
•
•
•
Battery chargers  
Electronic fuse  
DC motor control  
Over current monitor  
Power management  
Inrush current limiting  
2.2V - 20V supply range  
Voltage reference on chip  
Comparator on chip  
SO8 package  
Typical application circuit  
Ordering information  
Device  
Status  
Package  
Device  
Reel size Tape width Quantity  
marking  
ZXCT1030  
ZXCT1030  
(inches)  
(mm)  
per reel  
ZXCT1030X8TA Last time buy  
MSOP8  
SO8  
7
7
12  
1000  
ZXCT1030N8TA  
Active  
12  
500  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
1
www.zetex.com  
ZXCT1030  
Absolute maximum ratings  
Voltage on any pin  
-0.6V and V +0.6V  
CC  
Operating temperature  
Storage temperature  
-40 to 85°C  
-55 to 125°C  
Package power dissipation  
(T  
= 25°C)  
amb  
MSOP8  
500mW  
Recommended operating conditions  
Parameter  
Min.  
Max.  
Unit  
V
2.2  
2.2  
10  
20  
V
CC  
V
V
V
SENSE+  
CC  
(a)  
500  
mV  
V
V
V
SENSE  
OUT  
0
V
-1V  
V
V
SENSE  
0.005  
-40  
10  
comp-in  
T
85  
°C  
amb  
Pin-out connections  
Pin name  
Function  
V
V
V
Supply voltage  
Negative sense input  
Positive sense input  
Ground  
CC  
V
V
V
CC  
comp_out  
OUT  
SENSE-  
SENSE+  
V
V
SENSE-  
Vref_out  
V
SENSE+  
GND  
GND  
comp_in  
V
Comparator input, usually a ratio of the  
reference or other control signal  
comp_in  
Vref_out  
Reference output  
V
V
Current monitor output voltage  
OUT  
Open collector comparator output  
comp_out  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
2
www.zetex.com  
ZXCT1030  
Electrical characteristics (ZXCT1030X8) - Test conditions T  
= 25°C, V = V = 15V,  
amb  
IN  
CC  
R
= 10kV, V  
= 5V unless otherwise stated.  
comp  
comp_supply  
Symbol  
Parameter  
Conditions  
Limits  
Typ.  
Unit  
Min.  
2.2  
2.2  
0
Max.  
20  
V
CC  
V
V
V
V
range  
V
CC  
CC  
Sense+ range  
Output voltage  
SENSE+  
OUT  
V
V
V
V
V
V
= 0V  
2
10  
mV  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE-  
= 10mV  
= 30mV  
= 50mV  
= 100mV  
= 500mV  
88  
100  
300  
500  
1000  
5000  
1.5  
112 mV  
316 mV  
520 mV  
1030 mV  
5500 mV  
284  
480  
970  
4500  
1.2  
R
V
T
Output resistance  
V
= 15V, V  
= 1V  
1.8  
k⍀  
ppm/°C  
OUT  
OUT  
C
OUT  
V
30  
OUT  
temperature coefficient  
Supply current  
I
I
I
V
V
= 15V  
170  
25  
25  
270  
48  
70  
350 µA  
90 µA  
220 nA  
V
CC  
SENSE-  
V
V
input current  
input current  
SENSE+  
SENSE-  
SENSE+  
= 14.9V  
SENSE-  
SENSE-  
(b)  
Minimum active common V =15V  
mode voltage  
2.8  
V
CC  
CM(min)  
V
V
V
V
V
V
= 5V  
comp_supply  
= V  
comp_in  
REF  
= 10mV  
=100mV  
= 100mV  
=10mVp-p  
= 100mVp-p  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE  
A
Accuracy  
-3  
9.7  
3
10.3  
%
CC  
Gain  
BW  
V
/V  
10.0  
3
6
OUT  
SENSE  
Bandwidth  
MHz  
MHz  
V
Comparator  
V
V
Input voltage  
Hysteresis  
Input bias  
Propagation delay  
Output voltage low  
Output voltage high  
0.005  
5
10  
V
mV  
comp_in  
H
15  
80  
100  
150  
I
150 nA  
ns  
200 mV  
B
T
D
V
V
30  
OL  
V
V
OH  
comp_  
supply  
I
I
Output sink current  
Output high leakage  
current  
V
= 0.4V  
OL  
2
mA  
µA  
OL  
OH  
1.0  
Voltage reference  
V
Reference current =  
+300 A to -5  
Isource 5␮A to  
Isink 300␮A  
1.200 1.240 1.280  
10  
V
ref  
␮
␮A  
delta V  
Change in V  
mV  
ref  
ref  
T
PSR  
30  
0.01  
ppm/°C  
%/V  
C
Supply rejection  
NOTES:  
(a) VSENSE = (VSENSE+) - (VSENSE-)  
(b)Level of VSENSE+ where comparator output defaults to 'off'.  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
3
www.zetex.com  
ZXCT1030  
Electrical characteristics (ZXCT1030N8) - Test conditions T  
= 25°C, V = V = 15V,  
amb  
IN  
CC  
R
= 10kV, V  
= 5V unless otherwise stated.  
comp  
comp_supply  
Symbol  
Parameter  
Conditions  
Limits  
Typ.  
Unit  
Min.  
2.2  
2.2  
0
Max.  
20  
V
CC  
V
V
V
V
range  
V
CC  
CC  
Sense+ range  
Output voltage  
SENSE+  
OUT  
V
V
V
V
V
V
= 0V  
2
10  
mV  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE-  
= 10mV  
= 30mV  
= 50mV  
= 100mV  
= 500mV  
88  
100  
300  
500  
1000  
5000  
1.5  
112 mV  
316 mV  
520 mV  
1030 mV  
5500 mV  
284  
480  
970  
4500  
1.2  
R
V
T
Output resistance  
V
= 15V, V  
= 1V  
1.8  
k⍀  
ppm/°C  
OUT  
OUT  
C
OUT  
V
30  
OUT  
temperature coefficient  
Supply current  
I
I
I
V
V
= 15V  
170  
2.8  
270  
48  
70  
350 µA  
90 µA  
220 nA  
V
CC  
SENSE-  
V
V
input current  
input current  
SENSE+  
SENSE-  
SENSE+  
= 14.9V  
SENSE-  
SENSE-  
(b)  
Minimum active common V =15V  
mode voltage  
V
CC  
CM(min)  
V
V
V
V
V
V
= 5V  
comp_supply  
= V  
comp_in  
REF  
= 10mV  
=100mV  
= 100mV  
=10mVp-p  
= 100mVp-p  
SENSE  
SENSE  
SENSE  
SENSE  
SENSE  
A
Accuracy  
-3  
9.7  
3
10.3  
%
CC  
Gain  
BW  
V
/V  
10.0  
3
6
OUT  
SENSE  
Bandwidth  
MHz  
MHz  
V
Comparator  
V
V
Input voltage  
Hysteresis  
Input bias  
Propagation delay  
Output voltage low  
Output voltage high  
0.005  
5
10  
V
mV  
comp_in  
H
15  
80  
100  
150  
I
150 nA  
ns  
200 mV  
B
T
D
V
V
30  
OL  
V
V
OH  
comp_  
supply  
I
I
Output sink current  
Output high leakage  
current  
V
= 0.4V  
OL  
2
mA  
µA  
OL  
OH  
1.0  
Voltage reference  
V
Reference current =  
+300 A to -5  
Isource 5␮A to  
Isink 300␮A  
1.200 1.240 1.280  
10  
V
ref  
␮
␮A  
delta V  
Change in V  
mV  
ref  
ref  
T
PSR  
30  
0.01  
ppm/°C  
%/V  
C
Supply rejection  
NOTES:  
(c) VSENSE = (VSENSE+) - (VSENSE-)  
(d)Level of VSENSE+ where comparator output defaults to 'off'.  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
4
www.zetex.com  
ZXCT1030  
Typical characteristics  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
5
www.zetex.com  
ZXCT1030  
Voltage output current monitor  
Referring to the block diagram, the current monitor takes the small voltage developed across the  
sense resistor (V ) and transfers it from the large common mode supply voltage to a ground-  
SENSE  
referenced signal with a gain of 10. The sense input common mode range is 2.2V to 20V. In this  
range, a linear output voltage is delivered.  
Reference  
The bandgap reference allows the comparator to compare the translated Vsense with threshold  
value chosen by the user which can be any voltage from 0 to 1.24V, configured by two external  
resistors which forms V  
.
comp_in  
The output current which can be drawn from the comparator reference (I source) is limited to  
ref  
5µA, making potentiometers Ն250k⍀ suitable for setting a threshold level. Where a lower  
potentiometer resistor value is used, an additional resistor value should be inserted between V  
ref  
and V to maintain sufficient current for the reference. (as shown in Figure 1).  
CC  
Figure 1: External resistor for reference level  
The voltage reference has a maximum current sink capability. This magnitude of current will be  
influenced by the value of R1 which is inserted between V and V . The value of current flowing  
ref  
CC  
through R1 can be expressed as:  
I = (V -V ) / R1  
CC  
ref  
Comparator  
The open collector output is active low and is asserted when V  
x 10 (V  
) > V  
.
SENSE  
OUT  
comp_in  
It can be connected to any voltage rail up to Vin via a pull-up resistor. Suggest values for the  
resistor are in the range of 10-100k⍀.  
In the case where high load currents or a short circuit occurs, thus reducing the common mode  
signals (V+, V-) typically below 2.2V, the comparator will default to the asserted state. This can  
eliminate a closed loop system 'latch-up' condition, allowing the controller to remove the applied  
power.  
Stability  
To ensure stable operation of the ZXCT1030, it is recommended a decoupling capacitor is placed  
across the V and ground connections. A ceramic 10␮F will be adequate.  
CC  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
6
www.zetex.com  
ZXCT1030  
Intentionally left blank  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
7
www.zetex.com  
ZXCT1030  
Package outline - SO8  
DIM  
Inches  
Min.  
Millimeters  
DIM  
Inches  
Min. Max.  
0.050 BSC  
Millimeters  
Max.  
0.069  
0.010  
0.197  
0.244  
0.157  
0.050  
Min.  
Max.  
1.75  
0.25  
5.00  
6.20  
4.00  
1.27  
Min.  
Max.  
A
A1  
D
0.053  
0.004  
0.189  
0.228  
0.150  
0.016  
1.35  
0.10  
4.80  
5.80  
3.80  
0.40  
e
b
c
1.27 BSC  
0.013  
0.020  
0.010  
8°  
0.33  
0.19  
0°  
0.51  
0.25  
8°  
0.008  
0°  
H
⍜
h
-
E
0.010  
-
0.020  
-
0.25  
-
0.50  
-
L
Note: Controlling dimensions are in inches. Approximate dimensions are provided in millimeters  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
8
www.zetex.com  
ZXCT1030  
Package outline - MSOP8  
c
e
E1  
E
R1  
D
L
R
A
A2  
A1  
b
DIM  
Millimeters  
Inches  
Min.  
-
Max.  
1.10  
0.15  
0.95  
0.40  
0.23  
3.10  
Min.  
-
Max.  
0.0433  
0.006  
0.0374  
0.0157  
0.009  
A
A1  
A2  
b
c
D
0.05  
0.75  
0.25  
0.13  
2.90  
0.002  
0.0295  
0.010  
0.005  
0.114  
0.122  
E
E1  
e
4.90 BSC  
0.65 BSC  
0.193 BSC  
0.025 BSC  
2.90  
3.10  
0.114  
0.122  
L
R
R1  
0.40  
0.07  
0.07  
0.70  
-
-
0.0157  
0.0027  
0.0027  
0.0192  
-
-
Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
9
www.zetex.com  
ZXCT1030  
Definitions  
Product change  
Zetex Semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or  
service. Customers are solely responsible for obtaining the latest relevant information before placing orders.  
Applications disclaimer  
The circuits in this design/application note are offered as design ideas. It is the responsibility of the user to ensure that the circuit is fit for  
the user’s application and meets with the user’s requirements. No representation or warranty is given and no liability whatsoever is  
assumed by Zetex with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights  
arising from such use or otherwise. Zetex does not assume any legal responsibility or will not be held legally liable (whether in contract,  
tort (including negligence), breach of statutory duty, restriction or otherwise) for any damages, loss of profit, business, contract,  
opportunity or consequential loss in the use of these circuit applications, under any circumstances.  
Life support  
Zetex products are specifically not authorized for use as critical components in life support devices or systems without the express written  
approval of the Chief Executive Officer of Zetex Semiconductors plc. As used herein:  
A. Life support devices or systems are devices or systems which:  
1. are intended to implant into the body  
or  
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the  
labelling can be reasonably expected to result in significant injury to the user.  
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to  
cause the failure of the life support device or to affect its safety or effectiveness.  
Reproduction  
The product specifications contained in this publication are issued to provide outline information only which (unless agreed by the  
company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a  
representation relating to the products or services concerned.  
Terms and Conditions  
All products are sold subjects to Zetex’ terms and conditions of sale, and this disclaimer (save in the event of a conflict between the two  
when the terms of the contract shall prevail) according to region, supplied at the time of order acknowledgement.  
For the latest information on technology, delivery terms and conditions and prices, please contact your nearest Zetex sales office.  
Quality of product  
Zetex is an ISO 9001 and TS16949 certified semiconductor manufacturer.  
To ensure quality of service and products we strongly advise the purchase of parts directly from Zetex Semiconductors or one of our  
regionally authorized distributors. For a complete listing of authorized distributors please visit: www.zetex.com/salesnetwork  
Zetex Semiconductors does not warrant or accept any liability whatsoever in respect of any parts purchased through unauthorized sales channels.  
ESD (Electrostatic discharge)  
Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices.  
The possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. The extent  
of damage can vary from immediate functional or parametric malfunction to degradation of function or performance in use over time.  
Devices suspected of being affected should be replaced.  
Green compliance  
Zetex Semiconductors is committed to environmental excellence in all aspects of its operations which includes meeting or exceeding  
regulatory requirements with respect to the use of hazardous substances. Numerous successful programs have been implemented to  
reduce the use of hazardous substances and/or emissions.  
All Zetex components are compliant with the RoHS directive, and through this it is supporting its customers in their compliance with  
WEEE and ELV directives.  
Product status key:  
“Preview”  
“Active”  
Future device intended for production at some point. Samples may be available  
Product status recommended for new designs  
“Last time buy (LTB)”  
Device will be discontinued and last time buy period and delivery is in effect  
“Not recommended for new designs” Device is still in production to support existing designs and production  
“Obsolete”  
Production has been discontinued  
Datasheet status key:  
“Draft version”  
This term denotes a very early datasheet version and contains highly provisional information, which  
may change in any manner without notice.  
“Provisional version”  
“Issue”  
This term denotes a pre-release datasheet. It provides a clear indication of anticipated performance.  
However, changes to the test conditions and specifications may occur, at any time and without notice.  
This term denotes an issued datasheet containing finalized specifications. However, changes to  
specifications may occur, at any time and without notice.  
Zetex sales offices  
Europe  
Americas  
Asia Pacific  
Corporate Headquarters  
Zetex GmbH  
Kustermann-park  
Balanstraße 59  
D-81541 München  
Germany  
Zetex Inc  
Zetex (Asia Ltd)  
Zetex Semiconductors plc  
Zetex Technology Park, Chadderton  
Oldham, OL9 9LL  
700 Veterans Memorial Highway  
Hauppauge, NY 11788  
USA  
3701-04 Metroplaza Tower 1  
Hing Fong Road, Kwai Fong  
Hong Kong  
United Kingdom  
Telefon: (49) 89 45 49 49 0  
Fax: (49) 89 45 49 49 49  
europe.sales@zetex.com  
Telephone: (1) 631 360 2222  
Fax: (1) 631 360 8222  
usa.sales@zetex.com  
Telephone: (852) 26100 611  
Fax: (852) 24250 494  
asia.sales@zetex.com  
Telephone: (44) 161 622 4444  
Fax: (44) 161 622 4446  
hq@zetex.com  
© 2007 Published by Zetex Semiconductors plc  
Issue 3 - June 2007  
© Zetex Semiconductors plc 2007  
10  
www.zetex.com  
厂商 型号 描述 页数 下载

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