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UC2854AN Folha de dados(PDF) 4 Page - Texas Instruments

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Nome de Peças UC2854AN
Descrição Electrónicos  ADVANCED HIGH-POWER FACTOR PREREGULATOR
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
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UC2854AN Folha de dados(HTML) 4 Page - Texas Instruments

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UC1854B
UC2854A, UC2854B
UC3854A, UC3854B
SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005
4
www.ti.com
ELECTRICAL CHARACTERISTICS
VCC = 18 V, RT = 8.2 kΩ, CT = 1.5 nF, VPKLMT = 1 V, VVRMS = 1.5 V, IIAC = 100 µA, IISENSE = 0 V, VCAO = 3.5 V, VVAO = 5 V, VVSENSE = 3 V,
−40
°C < TA < 85°C for the UC2854A and UC2854B, and 0°C < TA <70°C for the UC3854A and UC3854B, and TA = TJ (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OVERALL
Supply current, off
CAO = 0 V,
VAO = 0 V,
VCC = VUVLO−0.3 V
250
400
µA
Supply current, on
12
18
mA
VCC turn-on threshold voltage
UCx854A
15.0
16.0
17.5
VCC turn-on threshold voltage
UCx854B
8.0
10.5
11.2
V
VCC turn-off threshold voltage
9
10
12
V
VCC clamp
IVCC = IVCC(on) + 5 mA
18
20
22
VOLTAGE AMPLIFIER
Input voltage
2.9
3.0
3.1
V
VSENSE bias current
−500
−25
500
nA
Open loop gain
2 V
≤ VOUT ≤ 5 V
70
100
dB
VOH
High-level output voltage
ILOAD = −500 µA
6
V
VOL
Low-level output voltage
ILOAD = 500 µA
0.3
0.5
V
ISC
Output short-circuit current
VOUT = 0 V
1.5
3.5
mA
Gain bandwidth product(1)
fIN = 100 kHz,
10 mVP−P
1
MHz
CURRENT AMPLIFIER
Input offset voltage
VCM = 0 V,
TA = 25°C
−4
0
mV
Input offset voltage
VCM = 0 V,
overtemperature
−5.5
0
mV
Input bias current, ISENSE
VCM = 0 V
−500
500
nA
Open loop gain
2 V
≤ VOUT ≤ 6 V
80
110
dB
VOH
High-level output voltage
ILOAD = −500 µA
8
V
VOL
Low-level output voltage
ILOAD = 500 µA
0.3
0.5
V
ISC
Output short-circuit current
VOUT = 0 V
1.5
3.5
mA
CMRR
Common mode rejection range
−0.3
5.0
V
Gain bandwidth product(1)
fIN = 100 kHz,
10 mVP−P
3
5
MHz
REFERENCE
Output voltage
IREF = 0 mA,
TA = 25°C
7.4
7.5
7.6
V
Output voltage
IREF = 0 mA
7.35
7.50
7.65
V
Load regulation
1 mA
≤ IREF ≤ 10 mA
0
8
20
mV
Line regulation
12 V
≤ VCC ≤ 18 V
0
14
25
mV
ISC
Short circuit current
VREF = 0 V
25
35
60
mA
(1) Ensured by design. Not production tested.
(2) Gain constant. (K) +
I
IAC
V
VAO *
1.5 V
V
VRMS
2
I
MOUT


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