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UC1852J883B bảng dữ liệu(PDF) 2 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  High Power-Factor Preregulator
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UC1852J883B bảng dữ liệu(HTML) 2 Page - Texas Instruments

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SOIC–8 (TOP VIEW)
D Package
Unless otherwise stated, VCC=24V, ISET=50k
Ω to GND, RAMP=1nF to GND, ISNS=
–0.1V, VFB connected to COMP, no load on OUT, –55
°C<Ta<+125°C for the UC1852,
–40
°C<Ta<+85°C for the UC2852, and 0°C<Ta<+70°C for the UC3852, and Ta=Tj.
UC1852
UC2852
UC3852
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (Low-impedance Source)..........................30.0V
Supply Current (High-impedance Source) ......................30.0mA
OUT Current, Peak .............................................................
±1.0A
OUT Energy, Capacitive Load............................................ 5.0
µJ
Input Voltage, ISNS ............................................................
±5.0V
Input Voltage, VFB............................................. –0.3V to +10.0V
COMP Current ...............................................................
±10.0mA
ISET Current..................................................................–10.0mA
Power Dissipation at Ta
≤25°C (Note 3) ..............................1.0W
Storage Temperature ....................................... –65
°C to +150°C
Lead Temperature (Soldering, 10 Seconds) ................... +300
°C
Note 1: All voltages with respect to GND (Pin 1).
Note 2: All currents are positive into the specified terminal.
Note 3: Refers to DIL-8 Package. Consult Packaging Section of
Unitrode Integrated Circuits databook for thermal limitations and
considerations of package.
DIL–8 (TOP VIEW)
J or N Package
CONNECTION DIAGRAM
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNITS
Timer Section
ISET Voltage
4.5
5.0
5.5
V
RAMP Charge Current
RAMP=2.5V
88
98
108
µA
RAMP Discharge Current
ISNS= –1.0V, RAMP=1.0V
12
28
50
mA
RAMP Saturation Voltage
ISNS= –1.0V, IRAMP=100
µA
0.006
0.200
V
RAMP Threshold - Maximum Frequency
VFB=10V, COMP open
0.92
1.02
1.12
V
RAMP Threshold - PWM Comparator
3.9
4.3
4.8
V
Current Sense Comparator
ISNS Restart Threshold
–18
–10
–4
mV
ISNS Fault Threshold
–550
–450
–350
mV
ISNS Input Current
–100
–30
100
µA
Error Amplifier Section
VFB Input Voltage
4.6
5.0
5.3
V
VFB Input Bias Current
–5.00
–0.03
5.00
µA
COMP Sink Current
COMP=7.5V
10
mA
COMP Source Current
COMP=2.5V
–300
–175
–100
µA
COMP Clamp Voltage
VFB=0.0V, COMP open
9.2
10.0
10.6
V
OUT Output
OUT Saturation Voltage High
VCC=13V, IOUT= –200mA, RAMP=2V
0.5
1.7
2.5
V
OUT Saturation Voltage Low
IOUT=200mA, ISNS= –1.0V
0.5
1.6
2.2
V
OUT Saturation Voltage Low @ 10mA
IOUT=10mA, ISNS= –1.0V
0.05
0.40
V
OUT Clamp Voltage
IOUT= –200mA, RAMP=2V
10.0
12.0
14.5
V
OUT Voltage during UVLO
IOUT=100mA, VCC=0V
0.5
1.0
2.2
V
Overall Section
Inactive Supply Current
VCC=10V
0.2
0.4
1.0
mA
Active Supply Current
3.0
6.0
10.0
mA
VCC Clamp Voltage
ICC=25mA
30
33
36
V
VCC Turn-On Threshold
14.5
16.3
17.5
V
VCC Turn-Off Threshold
10.5
11.5
13.0
V
VCC Threshold Hysteresis
3
5
7
V
UDG-92002
2


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