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UC2847DWTR Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce UC2847DWTR
Description  Current Mode PWM Controller
Download  10 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2847DWTR Fiches technique(HTML) 3 Page - Texas Instruments

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3
UC1846/7
UC2846/7
UC3846/7
UC1846/UC1847
UC3846/UC3847
PARAMETER
TEST CONDITIONS
UC2846/UC2847
MIN.
TYP.
MAX.
MIN.
TYP.
MAX. UNITS
Oscillator Section
Initial Accuracy
TJ=25°C
39
43
47
39
43
47
kHz
Voltage Stability
VIN=8V to 40V
-1
2
-1
2
%
Temperature Stability
Over Operating Range (Note 2)
-1
-1
%
Sync Output High Level
3.9
4.35
3.9
4.35
V
Sync Output Low Level
2.3
2.5
2.3
2.5
V
Sync Input High Level
Pin 8=0V
3.9
3.9
V
Sync Input Low Level
Pin 8=0V
2.5
2.5
V
Sync Input Current
Sync Voltage=3.9V, Pin 8=0V
1.3
1.5
1.3
1.5
mA
Error Amp Section
Input Offset Voltage
0.5
5
0.5
10
mV
Input Bias Current
-0.6
-1
-0.6
-2
µA
Input Offset Current
40
250
40
250
nA
Common Mode Range
VIN=8V to 40V
0
VIN-2V
0
VIN-2V
V
Open Loop Voltage Gain
∆VO=1.2 to 3V, VCM=2V
80
105
80
105
dB
Unity Gain Bandwidth
TJ=25°C (Note 2)
0.7
1.0
0.7
1.0
MHz
CMRR
VCM=0V to 38V, VIN=40V
75
100
75
100
dB
PSRR
VIN=8V to 40V
80
105
80
105
dB
Output Sink Current
VID=-15mV to -5V, VPIN 7=1.2V
2
6
2
6
mA
Output Source Current
VID=15mV to 5V, VPIN 7=2.5V
-0.4
-0.5
-0.4
-0.5
mA
High Level Output Voltage
RL=(Pin 7) 15k
4.3
4.6
4.3
4.6
V
Low Level Output Voltage
0.7
1
0.7
1
V
Current Sense Amplifier Section
Amplifier Gain
VPIN 3=0V, Pin 1 Open (Notes 3 & 4)
2.5
2.75
3.0
2.5
2.75
3.0
V
Maximum Differential Input
Pin 1 Open (Note 3)
Signal (VPIN 4-VPIN 3)RL (Pin 7)=15kW
1.1
1.2
1.1
1.2
V
Input Offset Voltage
VPIN 1=0.5V, Pin 7 Open (Note 3)
5
25
5
25
mV
CMRR
VCM=1V to 12V
60
83
60
83
dB
PSRR
VIN=8V to 40V
60
84
60
84
dB
Input Bias Current
VPIN 1=0.5V, Pin 7 Open (Note 3)
-2.5
-10
-2.5
-10
µA
Input Offset Current
VPIN 1=0.5V, Pin 7 Open (Note 3)
0.08
1
0.08
1
µA
Input Common Mode Range
0
VIN-3
0
VIN-3
V
Delay to Outputs
TJ=25°C, (Note 2)
200
500
200
500
ns
Current Limit Adjust Section
Current Limit Offset
VPIN 3=0V, VPIN 4=0V, Pin 7 Open
(Note 3)
0.45
0.5
0.55
0.45
0.5
0.55
V
Input Bias Current
VPIN 5=VREF,VPIN 6=0V
-10
-30
-10
-30
µA
Shutdown Terminal Section
Threshold Voltage
250
350
400
250
350
400
mV
Input Voltage Range
0
VIN
0VIN
V
Minimum Latching Current
(Note 6)
(IPIN 1)
3.0
1.5
3.0
1.5
mA
ELECTRICAL
CHARACTERISTICS (cont.)
(Unless otherwise stated, these specifications apply for TA=-55°C to +125°C for UC1846/7;
-40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; VIN=15V, RT=10k,
CT=4.7nF, TA=TJ.)


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