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UCC2926DS Datasheet(PDF) 4 Page - Texas Instruments

Part # UCC2926DS
Description  짹 20A Integrated Current Sensor
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCC2926DS Datasheet(HTML) 4 Page - Texas Instruments

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4
UCC1926
UCC2926
UCC3926
GND: This pin is the return point for all device currents.
INV: Negative input to the programmable amplifier to
provide differential to single-ended signal conversion.
NI: Positive input to the programmable amplifier to
provide differential to single-ended signal conversion.
OC: Overcurrent comparator output. When OUT is
greater than OCREF, OC switches high. The OC
comparator has a typical hysteresis of 25mV.
OCREF: The reference pin of overcurrent comparator for
setting overcurrent threshold voltage.
OUT: Output of the programmable amplifier intended to
provide differential to single-ended signal conversion of
the transimpedance amplifier's outputs.
Use this opamp to establish overall gain and nominal
zero current reference voltage. This amplifier may be
configured with a gain of one or more. Any non-common
mode “chopping” noise between AOP and AON will show
up at OUT. Some filtering of OUT may improve the appli-
cation’s performance.
SIGN: Sign comparator output. SIGN also controls the
analog switches in the cross-switching block to keep
AOP greater than AON. At currents near zero amps, the
sign comparator may switch from “chopping” noise from
the transimpedance amplifier.
VDD: VDD is the power input connection for this device.
Its input range is from 4.8V to 14V. Bypass to GND using
good quality ceramic capacitors.
PIN DESCRIPTIONS (cont.)
0
100
200
300
400
500
600
700
-20
-15
-10
-5
0
5
10
15
20
INPUT CURRENT [A]
LIMITOFRESOLUTION
(SIGN LIMIT
THRESHOLD BAND)
Figure 2. Differential output voltage (AOP-AON) vs.
input current (IIN).
TYPICAL CHARACTERISTICS CURVES
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
-75
-50
-25
0
25
50
75
100
125
TEMPERATURE [°C]
Figure 3. Quiescent AOP, AON output voltage vs.
temperature.
480
500
520
540
560
580
600
620
-75
-50
-25
0
25
50
75
100
125
TEMPERATURE [°C]
VDD = 14V
VDD = 12V
VDD = 10V
VDD = 4.8V
IIN = 15A
Figure 4. Differential output voltage (AOP - AON) vs.
VDD and temperature.
0.800
0.900
1.000
1.100
1.200
1.300
1.400
1.500
1.600
1.700
1.800
-75
-50
-25
0
25
50
75
100
125
TEMPERATURE [°C]
Figure 5. Typical shunt resistance vs. temperature.


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