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UC3844 数据表(PDF) 3 Page - E-Tech Electronics LTD

部件名 UC3844
功能描述  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
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制造商  ETL [E-Tech Electronics LTD]
网页  http://e-tech.com.hk
标志 ETL - E-Tech Electronics LTD

UC3844 数据表(HTML) 3 Page - E-Tech Electronics LTD

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UC3844/45
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
3 of 6
www.unisonic.com.tw
QW-R103-010.E
ABSOLUTE MAXIMUM RATINGS (TA=25℃)
PARAMETER
SYMBOL
RATINGS
UNIT
Total Power Supply and Zener Current
(ICC+Iz)
30
mA
Output Current, Source or Sink (Note 2)
IOUT
1.0
A
Output Energy (Capacitive Load per cycle)
W
5.0
μJ
Current Sense and Voltage feedback Inputs
VIN
-0.3 ~ +5.5
V
Error Amp Output Sink Current
ISINK
10
mA
Power Dissipation
SOP-8
PD
862
mW
DIP-8
1250
mW
Junction Temperature
TJ
+150
Operation Temperature
TOPR
0 ~ 70
Storage Temperature
TSTG
-65 ~ +150
Note:1.Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2.Maxmum package power dissipation limits must be observed.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
Junction to Ambient
SOP-8
θJA
145
/W
DIP-8
100
/W
ELECTRICAL CHARACTERISTICS
(TA=25℃, VCC=15V, RT=10k, CT=3.3nF, 0℃ TA 70℃, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REFERENCE SECTION
Reference Output Voltage
VREF
IOUT=1.0mA,TJ=25℃
4.9
5.0
5.1
V
Line Regulation
VOUT
VCC=12V ~ 25V
2.0
20
mV
Load Regulation
VOUT
IOUT=1.0mA ~ 20mA
3.0
25
mV
Temperature Stability
tS
0.2
mV/℃
Total Output Variation over Line,
Load, Temperature
VREF
4.82
5.18
V
Output Noise Voltage
eN
f=10Hz ~ kHz, TJ=25℃
50
μV
Long Term Stability
S
TA=125℃ for 1000 Hours
5
mV
Output Short Circuit Current
ISC
-30
-85
-180
mA
OSCILLATOR SECTION
Oscillator Voltage Swing
VOSC
1.6
V
Discharge Current
IDSG
VOSC=2.0V, TJ=25℃
10.8
mA
Frequency
fOSC
TJ=25℃
47
52
57
kHz
0
°C ≤ TA ≤ 70℃
46
60
Frequency Change with Voltage
ΔfOSC/ΔV
VCC=12V ~ 25V
0.2
1.0
%
Frequency Change with Temperature
ΔfOSC/ΔT
0
°C ≤ TA ≤ 70℃
5.0
%
ERROR AMPLIFIER SECTION
Voltage Feedback Input
VFB
VOUT=2.5V
2.42
2.50
2.58
V
Output Voltage Swing
High
VOH
RL=15k to ground, VFB=2.3V
5.0
6.2
V
Low
VOL
RL=15k to VREF, VFB=2.7V
0.8
1.1
Output Current
Sink
ISINK
VOUT=1.1V, VFB=2.7V
2.0
12
mA
Source
ISOURCE
VOUT=5.0V, VFB=2.3V
-0.5
-1.0
Input Bias Current
II(BIAS)
VFB=2.7V
-0.1
-2.0
μA
Open Loop Voltage Gain
GVO
VOUT=2.0V ~ 4.0V
65
90
dB
Power Supply Rejection Ratio
PSRR
VCC=12V ~ 25V
60
70
dB
Unity Gain Bandwidth
GBW
TJ=25℃
0.7
1.0
MHz


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