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UC1854A датащи(PDF) 3 Page - Texas Instruments

номер детали UC1854A
подробное описание детали  Enhanced High Power Factor Preregulator
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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UC1854A датащи(HTML) 3 Page - Texas Instruments

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ELECTRICAL
CHARACTERISTICS (cont.)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
CURRENT AMPLIFIER
Input Offset Voltage
VCM = 0V
TA = +25
°C
−40
mV
OverTemp
–5.5
0
mV
Input Bias Current(sense)
VCM = 0V
–500
500
nA
Open Loop Gain
VCM = 0V, VOUT = 2 to 6V
80
110
dB
VOUT High
ILOAD = –500
µA8
V
VOUT Low
ILOAD = 500
µA
0.3
0.5
V
Output Short Circuit Current
VOUT = 0V
1.5
3.5
mA
Common Mode Range
–0.3
5
V
Gain Bandwidth Product
Fin = 100kHz, 10mV p-p, (Note 1)
3
5
mHz
REFERENCE
Output Voltage
IREF = 0mA, TA = 25
oC
7.4
7.5
7.6
V
IREF = 0mA
7.35
7.5
7.65
V
Load Regulation
IREF = 1 to 10mA
0
8
20
mV
Line Regulation
VCC = 12 to 18V
0
14
25
mV
Short Circuit Current
VREF = 0V
25
35
60
mA
OSCILLATOR
Initial Accuracy
TA = 25
oC
85
100
115
kHz
Voltage Stability
VCC = 12 to 18V
1
%
Total Variation
Line, Temp
80
120
kHz
Ramp Amplitude (p-p)
4.9
5.9
V
Ramp Valley Voltage
0.8
1.3
V
ENABLE / SOFTSTART / CURRENT LIMIT
Enable Threshold
2.35
2.55
2.8
V
Enable Hysteresis
VFAULT = 2.5V
500
600
mV
Enable Input Bias Current
VENABLE = 0V
–2
–5
µA
Propagation Delay to Disable
Enable Overdrive = –100mV,(Note 1)
300
ns
SS Charge Current
VSOFTSTART = 2.5V
10
14
24
PKLMT Offset Voltage
–15
15
mV
PKLMT Input Current
VPKLMT = –0.1V
–200
–100
µA
PKLMT Propagation Delay
(Note 1)
150
ns
MULTIPLIER
Output Current - IAC Limited
IAC=100
µA, VRMS = 1V, RSET = 10k
–220
–200
–170
µA
Output Current - Zero
IAC=0
µA, RSET = 10k
–2.0
–0.2
2.0
µA
Output Current - Power Limited
VRMS = 1.5V, Va = 6V
–230
–200
–170
µA
Output Current
VRMS = 1.5V, Va = 2V
–22
µA
VRMS = 1.5V, Va = 5V
–156
µA
VRMS = 5V, Va = 2V
–2
µA
VRMS = 5V, Va = 5V
–14
µA
Gain Constant
(Note 2) VRMS = 1.5V, TJ = 25°C, Va = 6V
–1.1
–1.0
–0.9
A/A
UC1854A/B
UC2854A/B
UC3854A/B
Unless otherwise stated, VCC=18V, RT=8.2k, CT=1.5nF, PKLMT=1V, VRMS=1.5V,
IAC=100
µA, ISENSE=0V, CA Out=3.5V, VA Out=5V, VSENSE=3V, –55oC<TA<125oC for the
UC1854A/B, –40
oC<TA<85oC for the UC2854A/B, and 0oC<TA<70oC for the UC3854A/B,
and TA=TJ.
Note 1: Guaranteed by design, not 100% tested in production.
Note 2: Gain constant (K) =
IAC
× (Va − 1.5V)
VRMS
2 × IMO
3


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