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UC2853ADG4 Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce UC2853ADG4
Description  High Power Factor Preregulator
Download  9 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC2853ADG4 Fiches technique(HTML) 3 Page - Texas Instruments

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UC2853A
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
Multiplier Section
Output Current – IAC Limited
VCC = 11V, VVCOMP = 6V
–230
–200
–170
mA
Output Current – Zero
IAC = 0
mA
–2
–0.2
2
mA
Output Current – Power Limited
VCC = 12V, VVCOMP = 5.5V
–236
–178
–168
mA
Output Current
VCC= 12V, VVCOMP = 2V
–22
mA
VCC= 12V, VVCOMP = 5V
–156
mA
VCC= 40V, VVCOMP =2V
–2
mA
VCC= 40V, VVCOMP = 5V
–14
mA
Multiplier Gain Constant
VCC= 12V, VVCOMP = 5.5V (Note 2)
–1.05
–0.9
–0.75
V
–1
Oscillator Section
Oscillator Initial Frequency
TA = 25°C
56
63
70
kHz
Oscillator Frequency
Line, Load, Temperature
50
63
74
kHz
Synchronization Frequency Range
100
kHz
Synchronization Pulse Amplitude
Pulse slew rate = 100V/
msec (Note 3)
2
V
Output Driver Section
Maximum Output Voltage
0mA load, VCC = 20V
12
15
17.5
V
Output High
0mA load, VCC = 12V, ref. to VCC
–2.7
–1.7
V
–50mA load, VCC = 12V, ref. to VCC
–3
–2.2
V
Output Low (Device Inactive)
Vcc = 0V, 20mA load (Sinking)
0.9
2.0
V
Output Low (Device Active)
50mA load (Sinking)
0.5
1
V
OUT Rise Time
1nF from OUT to GND
55
100
ns
OUT Fall Time
1nF from OUT to GND
35
100
ns
OUT Maximum Duty Cycle
VICOMP =0V
88
93
%
OVP Comparator Section
Threshold Voltage
Volts Above EA Input V
90
150
mV
Hysteresis
80
mV
Note 1:
1
PWM modulator gain
DutyCycle
VICOMP
= D
D
Note 2:
Gainconstant K
IAC
VCOMP
V
IMO VCC
VCC
()
(– .
)
=
·
··
15
64
, VCC = 12V.
Note 3.
Synchronization is accomplished with a falling edge of 2V mag-
nitude and 100V/
msec slew rate.
(continued)
1
1


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