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PDF ZXCT1009Q Data sheet ( Hoja de datos )
| Número de pieza | ZXCT1009Q | |
| Descripción | AUTOMOTIVE GRADE MICROPOWER CURRENT MONITOR | |
| Fabricantes | Diodes | |
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A Product Line of
Diodes Incorporated
ZXCT1009Q
AUTOMOTIVE GRADE MICROPOWER CURRENT MONITOR
Description
The ZXCT1009Q is a micropower high side current sense monitor.
This device eliminates the need to disrupt the ground plane when
sensing a load current.
Pin Assignments
SOT23
Package Suffix - F
It takes a high side voltage developed across a current shunt resistor
and translates it into a proportional output current. A user defined
output resistor scales the output current into a ground-referenced
voltage.
The wide input voltage range of 20V down to as low as 2.5V make it
suitable for a range of applications. A minimum operating current of
just 4µA, combined with a SOT23 package make it a unique solution
for portable battery equipment.
VSENSE- 3
VSENSE+ 2
1 IOUT
(Top View)
The ZXCT1009Q has been qualified to AEC-Q100 Grade 3 and is
Automotive Grade supporting PPAPs.
Features
Low cost, accurate high-side current sensing
Output voltage scaling
Up to 2.5V sense voltage
2.5V to 20V supply range
4μA quiescent current
Applications
Automotive Current Measurement
Automotive DC Motor Stall Detection
Over Current Monitor
1% typical accuracy
SOT23
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Grade
Qualified to AEC-Q100 Standards for High Reliability
PPAP Capable (Note 4)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free,
"Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the
same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.
Typical Application Circuit
ZXCT1009Q
Document number: DS36990 Rev. 1 - 2
1 of 8
www.diodes.com
December 2014
© Diodes Incorporated
1 page  
Typical Characteristics (cont.)
A Product Line of
Diodes Incorporated
ZXCT1009Q
Application Information
Referring to Figure 1, where RLOAD represents any load including DC motors, a charging battery or further circuitry that requires monitoring,
RSENSE can be selected on specific requirements of accuracy, size and power rating.
The following text describes how to scale a load current to an output voltage.
Referring to Figure 1.
VSENSE = VIN - VLOAD
= RSENSE x ILOAD
IOUT = VSENSE x 10mA/V
(1)
(2)
VOUT = IOUT x ROUT
(3)
Combining (2) and (3) VOUT can be determined to be:
VOUT = 0.01 x VSENSE x ROUT
(4)
Example:
A 1A current is to be represented by a 1V output voltage:
1) Choose the value of RSENSE to give 50mV > VSENSE > 500mV at full load.
For example set VSENSE = 100mV at 1.0A.
Rearranging (1) gives:
= I AD
= 0.1/1.0 = 0.1Ω.
Figure 1: ZXCT1009Q typical circuit
2) Choose ROUT to give VOUT = 1V, when VSENSE = 100mV.
Rearranging (4) for ROUT gives:
= 0.001
1
= 0.1 0.01 = 1kΩ
ZXCT1009Q
Document number: DS36990 Rev. 1 - 2
5 of 8
www.diodes.com
December 2014
© Diodes Incorporated
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ZXCT1009Q.PDF ] | |
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