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UC2853A Fiches technique(PDF) 2 Page - Texas Instruments

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No de pièce UC2853A
Description  High Power Factor Preregulator
Download  10 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2853A Fiches technique(HTML) 2 Page - Texas Instruments

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UC2853A
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) .............................40V
Output Drive Current,
Continuous ................................ 0.125A
Peak ....................................... 0.5A
Output Minimum Voltage ......................... –0.3V
IAC Maximum Input Current ........................1mA
IMO Maximum Output Current ..................... –2mA
IMO Minimum Voltage ........................... –0.3V
FB Maximum Input Voltage ..........................5V
VCOMP Maximum Voltage......................... 6.2V
ICOMP Sourcing Current .................... Self-Limiting
ICOMP Sinking Current .......................... 20mA
ICOMP Maximum Voltage ......................... 7.2V
Storage Temperature ................... –65°C to +150°C
Junction Temperature ................... –55°C to +150°C
Lead Temperature (Soldering, 10 sec.) ............. +300°C
All voltages with respect to GND. Currents are positive into,
negative out of the specified terminal. Consult Packaging Section
of Databook for thermal limitations and considerations of
packages.
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, these parameters apply for TA = –40°C to 105°C for the
UC2853A; VCC = 16V, VFB = 3V, IAC = 100
mA, VVCOMP = 3.75V, VICOMP = 3V, TA
=TJ.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Undervoltage Lockout Section
VCC Turn-on Threshold
VVCOMP,VICOMP Open
11.5
13
V
Hysteresis
1.5
1.8
2.1
V
Supply Current Section
IVCC Startup
VCC = 8V, IAC = 100
mA; VVCOMP,VICOMP Open
250
500
mA
IVCC
IAC = 0
mA, VICOMP =0V
10
15
mA
Voltage Loop Error Amplifier Section
Transconductance
IOUT = ± 20
mA 0-70C
300
450
575
mmho
Temperature
135
640
mmho
Input Voltage
0-70C
2.925
3
3.075
V
Temperature
2.9
3.1
V
AVOL
VVCOMP =1V–4V
50
60
dB
Output Sink Current
VFB = 3.2V, VVCOMP = 3.75V
20
50
mA
Output Source Current
VFB = 2.8V, VVCOMP = 3.75V
–50
–20
mA
Output Voltage High
5.5
6
V
Output Voltage Low
0.6
0.9
V
Current Loop Error Amplifier Section
Offset Voltage
06
mV
Voltage Gain
VICOMP =1V–4V
70
dB
Sink Current
VIMO = 100mV, VICOMP =3V
1
mA
Source Current
VIMO = –0.1V, VICOMP = 3V
–150
–80
mA
Output High
IICOMP = –50mA
6
6.8
V
Output Low
IICOMP =50
mA
0.3
0.8
V
PWM Modulator Gain
VICOMP = 2V – 3V (Note 1)
20
%/V
CONNECTION DIAGRAM
PDIP-8, SOIC-8 (Top View)
P or D Package


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