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UC3838A Datasheet(PDF) 3 Page - Texas Instruments

No. de pieza UC3838A
Descripción Electrónicos  Magnetic Amplifier Controller
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Fabricante Electrónico  TI [Texas Instruments]
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UC3838A Datasheet(HTML) 3 Page - Texas Instruments

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UC1838A
UC2838A
UC3838A
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = –55°C to +125°C for the
UC1838A, –20°C to +85°C for the UC2838A, and 0°C to +70°C for the UC3838A, VCC = 20V, VM = 5V, TA =TJ.
PARAMETER
TEST CONDITIONS
UC1838A / UC2838A
UC3838A
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Reference Section
Supply Current
VCC =VM = 40V
4
8
4
8
mA
Reference Output
TA = 25°C
2.47
2.5
2.53
2.45
2.5
2.55
V
Line Regulation
VCC = 5 to 30V
1
5
1
10
mV
Load Regulation
IO = 0 to –2mA
5
20
5
20
mV
Short Circuit Current
VREF = 0V
–30
–60
–30
–60
mA
Temperature Stability*
Over Operating Temp. Range
15
25
10
25
mV
Amplifier Section (Each Amplifier)
Offset Voltage
VCM = 2.5V
5
10
mV
Input Bias Current
VIN = 0V
–1
–1
µA
Input Offset Current
100
100
nA
Minimum Output Swing
0.4
18
0.4
18
V
Output Sink Current
VO = 5V
110
30110
30
mA
Output Source Current
VO = 0V
–1
–10
–20
–1
–10
–20
mA
AVOL
VO = 1 to 11V
100
120
100
120
dB
CMRR
VIN = 1 to 11V
70
80
70
80
dB
PSRR
VCC = 10 to 20V
70
100
70
100
dB
Gain Bandwidth*
0.6
0.8
0.6
0.8
MHz
Reset Drive Section
Input Leakage
VDR = 40V
10
10
µA
Output Leakage
VR = –120V
–100
–100
µA
Input Current
IR = –50mA
–1
–2
–1
–2
mA
Maximum Reset Current
IDR = –3mA
–100
–120
–200
–100
–120
–200
mA
Transconductance
IR = –10 to –50mA
.03
.042
.055
.03
.042
.055
A/V
* These parameters are guaranteed by design but not 100% tested in production.
TYPICAL APPLICATION
+12V, 4A output with switching frequency = 50 kHz.


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