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UC1526L883B Scheda tecnica(PDF) 3 Page - Texas Instruments

Il numero della parte UC1526L883B
Spiegazioni elettronici  Regulating Pulse Width Modulator
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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UC1526L883B Scheda tecnica(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS:
PARAMETER
TEST CONDITIONS
UC1526 / UC2526
UC3526
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Oscillator Section (Note 5)
Initial Accuracy
TJ = + 25°C
±3
±8
±3
±8%
Voltage Stability
+VIN = 8 to 35V
0.5
1
0.5
1
%
Temperature Stability
Over Operating TJ
710
3
5
%
Minimum Frequency
RT = 150k
Ω, CT = 20µµF1
1
Hz
Maximum Frequency
RT = 2k
Ω, CT = 1.0nF
400
400
kHz
Sawtooth Peak Voltage
+VIN = 35V
3.0
3.5
3.0
3.5
V
Sawtooth Valley Voltage
+VIN = 8V
0.5
1.0
0.5
1.0
V
Error Amplifier Section (Note 6)
Input Offset Voltage
RS
≤≤ 2kΩ
25
2
10
mV
Input Bias Current
-350
-1000
-350
-2000
nA
Input Offset Current
35
100
35
200
nA
DC Open Loop Gain
RL
≥ 10MΩ
64
72
60
72
dB
HIGH Output Voltage
VPIN1-VPIN2
≥≥ 150mV, ISOURCE =
100
µµA
3.6
4.2
3.6
4.2
V
LOW Output Voltage
VPIN2-VPIN1
≥≥ 150mV, ISINK = 100µµA
0.2
0.4
0.2
0.4
V
Common Mode Rejection
Rs
≤ 12kΩ
70
94
70
94
dB
Supply Voltage Rejection
+VIN = 12 to 18V
66
80
66
80
dB
PWM Comparator (Note 5)
Minimum Duty Cycle
VCOMPENSATION = +0.4V
0
0
%
Maximum Duty Cycle
VCOMPENSATION = +3.6V
45
49
45
49
%
Digital Ports (SYNC, SHUTDOWN, and RESET)
HIGH Output Voltage
ISOURCE =40
µµA
2.4
4.0
2.4
4.0
V
LOW Output Voltage
ISINK = 3.6mA
0.2
0.4
0.2
0.4
V
HIGH Input Current
VIH = +2.4V
-125
-200
-125
-200
µA
LOW Input Current
VIL = +0.4V
-225
-360
-225
-360
µA
Current LImit Comparator (Note 7)
Sense Voltage
RS
≤≤ 50Ω
90
100
110
80
100
120
mV
Input Bias Current
-3
-10
-3
-10
µA
Soft-Start Section
Error Clamp Voltage
RESET = +0.4V
0.1
0.4
0.1
0.4
V
Cs Charging Current
RESET =+2.4V
50
100
150
50
100
150
µA
Output Drivers (Each Output) (Note 8)
HIGH Output Voltage
ISOURCE = 20mA
12.5
13.5
12.5
13.5
V
ISOURCE = 100mA
12
13
12
13
V
LOW Output Voltage
ISINK = 20mA
0.2
0.3
0.2
0.3
V
ISINK = 100mA
1.2
2.0
1.2
2.0
V
Collector Leakage
VC = 40V
50
150
50
150
µA
Rise Time
CL = 1000pF
0.3
0.6
0.3
0.6
µs
Fall Time
CL = 1000pF
0.1
0.2
0.1
0.2
µs
Power Consumption (Note 9)
Standby Current
SHUTDOWN
____________
=
+0.4V
18
30
18
30
mA
+VIN = 15V, and over operating ambient temperature, unless otherwise
specified, TA = TJ.
UC1526
UC2526
UC3526
Note 4: IL = 0mA.
Note 5: FOSC = 40kHz (RT = 4.12k
Ω ± 1%, CT = 0.1µF ± 1%,
RD = 0
Ω)
Note 6: VCM = 0 to +5.2V
Note 8: VC = +15V
Note 9: +VIN = +35V, RT = 4.12k
3


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