Datasheet.kr   

UCC3926 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 UCC3926
기능 +-20A Integrated Current Sensor
제조업체 Unitrode
로고 Unitrode 로고 



전체 9 페이지

		

No Preview Available !

UCC3926 데이터시트, 핀배열, 회로
± 20A Integrated Current Sensor
application
INFO
available
UCC1926
UCC2926
UCC3926
FEATURES
Integral Non-inductive Current Sense
Element with Internal Kelvin
Connections
20A Current Rating
Bi-directional, High Side or Low Side
Sensing
Internal Temperature Nulling Circuitry
for Current Sense Element and
Amplifier
Logic Compatible Current Direction
Status Output
Low Offset, Chopper Stabilized
Current Sense Amplifier
Uncommitted Amplifier with User
Programmable Gain
Overcurrent Indication with User
Programmable Threshold
DESCRIPTION
The UCC3926 Current Sensor IC contains a wideband, transimpedance
amplifier for converting the current through an internal, non-inductive
1.3mshunt resistor into a proportional voltage. The sense element oper-
ates in both high-side (VDD referenced) and low-side (GND referenced) ap-
plications.
The UCC3926 can measure currents up to ±20A. This transimpedance am-
plifier gain is precisely trimmed to 33.3mto convert a 15A input into a
500mV output signal. It has a very low input offset voltage from chop-
per-stabilization. A cross-switching block rectifies the input signal by forcing
the differential output, AOP positive with respect to the other differential
output, AON. SIGN indicates the polarity of the current.
The UCC3926 programmable amplifier provides three functions. It converts
the differential transimpedance output signal into a single-ended signal. It
has a user-controlled gain stage that sets the maximum current level to the
desired voltage and it level shifts the zero current point to the desired level
as well. A comparator then compares the output of the instrumentation am-
plifier to a user-set reference voltage on OCREF, which provides an
overcurrent status bit OC.
The UCC3926 is available in the 16 pin SOIC package.
BLOCK DIAGRAM
SLUS266A - OCTOBER 1999
UDG-97139-1




UCC3926 pdf, 반도체, 판매, 대치품
PIN DESCRIPTIONS (cont.)
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.
UCC1926
UCC2926
UCC3926
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.
TYPICAL CHARACTERISTICS CURVES
700
600
500
400
300
200
100
0
LIMIT OF RESOLUTION
(SIGN LIMIT
THRESHOLD BAND)
-20 -15 -10
-5
0
5 10 15
INPUT CURRENT [A]
20
Figure 2. Differential output voltage (AOP-AON) vs.
input current (IIN).
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE [°C]
Figure 3. Quiescent AOP, AON output voltage vs.
temperature.
620
600
VDD = 14V
580
IIN = 15A
560
540
VDD = 12V
520
VDD = 10V
500
VDD = 4.8V
480
-75 -50 -25
0 25 50
TEMPERATURE [°C]
75
100 125
1.800
1.700
1.600
1.500
1.400
1.300
1.200
1.100
1.000
0.900
0.800
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE [°C]
Figure 4. Differential output voltage (AOP - AON) vs.
VDD and temperature.
Figure 5. Typical shunt resistance vs. temperature.
4

4페이지










UCC3926 전자부품, 판매, 대치품

7페이지



구       성총 9 페이지
다운로드[ UCC3926.PDF 데이터시트 ]
구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

전력 반도체 판매 ( IGBT, TR 모듈, SCR, 다이오드 모듈 )

휴대전화 : 010-3582-2743


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877, [ 홈페이지 ]



링크공유

링크 :

관련 데이터시트

부품번호상세설명 및 기능제조사
UCC3920

-3V to -15V Hot Swap Power Manager

Texas Instruments
Texas Instruments
UCC3921

Latchable Negative Floating Hot Swap Power Manager

Texas Instruments
Texas Instruments

DataSheet.kr    |   2019   |  연락처   |  링크모음   |   검색  |   사이트맵