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UC2854BQ Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce UC2854BQ
Description  ADVANCED HIGH-POWER FACTOR PREREGULATOR
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC2854BQ Fiches technique(HTML) 5 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS (Continued)
(2)
Gain constant.
( )
(
)
(
)2
1 5
IAC
VAO
VRMS
MOUT
I
V
. V
K
V
I
´
-
=
é
ù
´
ë
û
UC1854A
UC2854A, UC2854B
UC3854A, UC3854B
SLUS329E – MONTH 2003 – REVISED JANUARY 2008
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
OSCILLATOR
Initial accuracy
TA = 25°C
85
100
115
kHz
Voltage stability
12 V
≤ VCC ≤ 18 V
1%
Total variation
Line, temperature
80
120
kHz
Ramp amplitude (peak-to-peak)
4.9
5.9
V
Ramp valley voltage
0.8
1.3
V
ENABLE/SOFT-START/CURRENT LIMIT
Enable threshold voltage
2.35
2.55
2.80
V
Enaable hysteresis
VFAULT = 2.5 V
500
600
mV
Enable input bias current
VENA = 0 V
–2
–5
µA
Propagation delay to disable time(1)
Enable overdrive = 100 mV
300
ns
Soft-start charge current
VSS = 2.5 V
10
14
24
µA
Peak limit offset voltage
–15
15
mV
Peak limit offset current
VPKLMIT = –0.1 V
–200
–100
µA
Peak limit propagation delay time(1)
150
ns
MULTIPLIER
IAC = 100 µA,
VRMS = 1 V,
Output current, IA limited
–220
–200
–170
µA
RSET = 10 kΩ
Output current, zero
IAC = 0 µA,
RSET = 10 kΩ
–2.0
–0.2
2.0
µA
Output current, power limited
VRMS = 1.5 V
Va = 6 V
–230
–200
–170
µA
VRMS = 1.5 V
Va = 2 V
–22
VRMS = 1.5 V
Va = 5 V
–156
Output current
µA
VRMS = 5 V
Va = 2 V
–2
VRMS = 5 V
Va = 5 V
–14
Gain constant(2)
VRMS = 1.5 V
Va = 6 V, TA = 25°C
–1.1
–1.0
–0.9
A/A
GATE DRIVER
VOH
High-level output voltage
IOUT = –200 mA,
VCC = 15 V
12.0
12.8
V
VOL
Low-level output voltage
IOUT = 200 mA
1.0
2.2
V
IOUT = 10 mA
300
500
mV
Low-level UVLO voltage
IOUT = 50 mA,
VCC = 0 V
0.9
1.5
V
Output rise time(1)
CLOAD = 1 nF
35
ns
Output fall time(1)
CLOAD = 1 nF
35
ns
Output peak current(1)
CLOAD = 10 nF
1.0
A
(1)
Ensured by design. Not production tested.
Copyright © 2003–2008, Texas Instruments Incorporated
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5
Product Folder Link(s): UC1854A UC2854A, UC2854B UC3854A, UC3854B


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