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UC2854N Fiches technique(PDF) 2 Page - Texas Instruments

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No de pièce UC2854N
Description  High Power Factor Preregulator
Download  12 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC2854N Fiches technique(HTML) 2 Page - Texas Instruments

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Supply Voltage VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
GT Drv Current, Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A
GT Drv Current, 50% Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . 1.5A
Input Voltage, VSENSE, VRMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11V
Input Voltage, ISENSE, Mult Out . . . . . . . . . . . . . . . . . . . . . . . . . . . 11V
Input Voltage, PKLMT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Input Current, RSET, IAC, PKLMT, ENA . . . . . . . . . . . . . . . . . . . 10mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
Storage Temperature . . . . . . . . . . . . . . . . . . . .
–65
oC to +150oC
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . . . . . +300
oC
ABSOLUTE MAXIMUM RATINGS
PACKAGE PIN FUNCTION
FUNCTION
PIN
N/C
1
Gnd
2
PKLMT
3
CA Out
4
ISENSE
5
N/C
6
Mult Out
7
IAC
8
VA Out
9
VRMS
10
N/C
11
VREF
12
ENA
13
VSENSE
14
RSET
15
N/C
16
SS
17
CT
18
VCC
19
GT Drv
20
PLCC-20 & LCC-20
(Top View)
Q & L Packages
CONNECTION DIAGRAMS
DIL–16 & SOIC-16
(Top View)
J, N & DW Packages
Unless otherwise stated, VCC=18V, RSET=15k to ground, CT=1.5nF to ground, PKLMT=1V, ENA=7.5V,
VRMS=1.5V, IAC=100
µA, ISENSE=0V, CA Out=3.5V, VA Out=5V, VSENSE=7.5V, no load on SS, CA Out,
VA Out, REF, GT Drv, –55
oC<TA<125oC for the UC1854, –40oC<TA<85oC for the UC2854, and
0
oC<TA<70oC for the UC3854, and TA=TJ.
ELECTRICAL
CHARACTERISTICS
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
OVERALL
Supply Current, Off
ENA=0V
1.5
2.0
mA
Supply Current, On
10
16
mA
VCC Turn-On Threshold
14.5
16
17.5
V
VCC Turn-Off Threshold
9
10
11
V
ENA Threshold, Rising
2.4
2.55
2.7
V
ENA Threshold Hysteresis
0.2
0.25
0.3
V
ENA Input Current
ENA=0V
–5.0
–0.2
5.0
µA
VRMS Input Current
VRMS=5V
–1.0
–.01
1.0
µA
VOLTAGE AMPLIFIER
Voltage Amp Offset Voltage
VA Out=5V
–8
8
mV
VSENSE Bias Current
–500
–25
500
nA
Voltage Amp Gain
70
100
dB
Voltage Amp Output Swing
0.5 to 5.8
V
Voltage Amp Short Circuit Current
VA Out=0V
–36
–20
–5
mA
SS Current
SS=2.5V
–20
–14
–6
µA
UC1854
UC2854
UC3854
Note 1: All voltages with respect to Gnd (Pin 1).
Note 2: All currents are positive into the specified termi-
nal.
Note 3: ENA input is internally clamped to approximately
14V.
Note 4: Consult Unitrode Integrated Circuits databook for
information regarding thermal specifications and limita-
2


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