UC3842A Ver la hoja de datos (PDF) - Contek Microelectronics
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UC3842A Datasheet PDF : 6 Pages
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UC3842A /3843A LINEARINTEGRATED CIRCUIT
(continued)
PARAMETRER
Storage Temperature
Note 1: Ta>25 C, PD derated with 8mW/ C.
SYMBOL
Tstg
VALUE
-65 ~ +150
UNIT
C
ELECTRICAL CHARACTERISTICS(0 C <=Ta<=70 C,VCC=15V,RT=10kW,CT=3.3nF,unless otherwise
specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Reference Section
Output Voltage
VREF
Tj=25 C,Io=1mA
4.9
5
5.1
V
Line Regulation
DVREF
12<=VIN<=25V
6
20 mV
Load Regulation
Temperature Stability
DVREF
1<=Io=20mA
(Note 2)
6
25 mV
0.2 0.4 mV/ C
Total Output Variation
Line, Load, Temp(note 2)
4.82
5.18 V
Output Noise Voltage
Vosc 10Hz<=f<=10kHz,Tj=25 C (note 2)
50
uV
Long Term Stability
Ta=25 C,1000Hrs(note 2)
5
25 mV
Output Short Circuit
ISC
-30 -100 -180 mA
Oscillator Section
Initial Accuracy
f
Tj=25 C
47
52
57 kHz
Voltage Stability
Df/DVcc
12<=Vcc<=25V
0.2
1
%
Temperature Stability
Amplitude
Vosc
Tmin<=TA<=Tmax(note 2)
Vpin 4 peak to peak
5
%
1.7
V
Error Amplifier Section
Input Voltage
Input Bias Current
VI(EA)
IBIAS
Vpin 1=2.5V
2.42 2.50 2.58 V
-0.3 -2
mA
AVOL
Unity Gain Bandwidth
2 <=Vo<=4V
Tj=25 C (note 2)
60
90
0.7
1
dB
MHz
PSRR
I2<=Vcc<=25V
60
70
dB
Output Sink Current
Isink
Vpin 2=2.7V,Vpin 1=1.1V
2
6
mA
Output Source Current
Isource
Vpin 2=2.3V,Vpin 1=5V
-0.5 -0.8
mA
Vout High
VOH
Vpin 2=2.3V, RL=15kW to GND
5
6
V
Vout Low
VOL
Vpin 2=2.7V,Vpin 1=1.1V
0.7 1.1
V
Current Sense section
Gain
Maximum Input signal
GV
VI(MAX)
(note 3,4)
Vpin 1=5V( note 3)
2.85
3
3.15 V/V
0.9
1
1.1
V
PSRR
12<=Vcc<=25V
70
dB
Input Bias Current
IBIAS
-2
-10
mA
Delay to Output
Vpin 3=0 to 2V
150 300 ns
Output Section
Output Low Level
VOL
Isink=20mA
0.1 0.4
V
Isink=200mA
1.5 2.2
V
Output High Level
VOH
Isource=20mA
13 13.5
V
Isource=200mA
12 13.5
V
Rise Time
tR
Tj=25 C,CL=1nF(note 2)
50 150 ns
Fall Time
tF
Tj=25 C,CL=1nF(note 2)
50 150 ns
Under-Voltage Lockout Output Section
Start Threshold
VTH(ST)
Contek 3842A
14.5 16 17.5 V
Contek 3843A
7.8 8.4
9
V
Min. Operating Voltage
VOPR(min)
After Turn On
Contek 3842A
8.5
10 11.5
Contek 3843A
7
7.6 8.2
V
PWM Section
Maximum Duty Cycle
D(MAX)
95
97 100
%
Contek Microelectronics Co.,Ltd.
2
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
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