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UC2855ADW Fiches technique(PDF) 2 Page - Texas Instruments

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No de pièce UC2855ADW
Description  High Performance Power Factor Preregulator
Download  17 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC2855ADW Fiches technique(HTML) 2 Page - Texas Instruments

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2
UC2855A/B
UC3855A/B
ABSOLUTE MAXIMUM RATINGS
Supply Voltage VCC.......................... Internally Limited
VCC Supply Clamp Current ....................... 20mA
PFC Gate Driver Current (continuous) ..............± 0.5A
PFC Gate Driver Current (peak) ...................± 1.5A
ZVT Drive Current (continuous) ...................± 0.25A
ZVT Drive Current (peak)........................± 0.75A
I
nput Current (IAC, RT, RVA) .......................5mA
Analog Inputs (except Peak Limit) ..............
−0.3 to 10V
Peak Limit Input ...........................
−0.3 to 6.5V
Softstart Sinking Current ......................... 1.5mA
Storage Temperature ...................
−65°C to +150°C
Junction Temperature ...................
−55°C to +150°C
Lead Temperature (Soldering, 10 sec.) ............. +300
°C
Currents are positive into, negative out of the specified termi-
nal. Consult Packaging Section of Databook for thermal limita-
tions and considerations of packages. All voltages are
referenced to GND.
CONNECTION DIAGRAMS
PLCC-20 & LCC-20 (Top View)
Q or L Package
DIL–20 (Top View)
J or N Package
SOIC-20 (Top View)
DW Package
ELECTRICAL CHARACTERISTICS:Unless otherwise specified: VCC = 18V, RVS = 23k, CT = 470pF, CI = 150pF, VRMS
= 1.5V, IAC = 100
µA, ISENSE = 0V, CAO = 4V, VAOUT= 3.5V, VSENSE = 3V. –40°C to 85°C (UC2855A/B), 0°Cto70°C
(UC3855A/B).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Overall
Supply Current, OFF
CAO, VAOUT = 0V, VCC = UVLO
−0.3V
150
500
µA
Supply Current, OPERATING
17
25
mA
VCC Turn-On Threshold
UC3855A
15.5
17.5
V
VCCTurn-Off Threshold
UC3855A,B
9
10
V
VCC Turn-On Threshold
UC3855B
10.5
10.8
V
VCC Clamp
I(VCC) = ICC(on) + 5mA
18
20
22
V
Voltage Amplifier
Input Voltage
2.9
3.1
V
VSENSE Bias Current
−500
25
500
nA
Open Loop Gain
VOUT =2to5V
65
80
dB
VOUT High
ILOAD = –300µA
5.75
6
6.25
V
VOUT Low
ILOAD = 300µA
0.3
0.5
V
Output Short Circuit Current
VOUT = 0V
0.6
3
mA


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