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UC2843AN View Datasheet(PDF) - ON Semiconductor

Part Name
Description
Manufacturer
UC2843AN Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UC3842A, UC3843A, UC2842A, UC2843A
ELECTRICAL CHARACTERISTICS (VCC = 15 V, [Note 2], RT = 10 k, CT = 3.3 nF, TA = Tlow to Thigh [Note 3],
unless otherwise noted.)
UC284XA
UC384XA
Characteristics
Symbol Min
Typ
Max Min
Typ
Max
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = 25°C)
Line Regulation (VCC = 12 V to 25 V)
Load Regulation (IO = 1.0 mA to 20 mA)
Temperature Stability
Total Output Variation over Line, Load, Temperature
Output Noise Voltage (f = 10 Hz to 10 kHz,
TJ = 25°C)
Long Term Stability (TA = 125°C for 1000 Hours)
Output Short Circuit Current
OSCILLATOR SECTION
Frequency
TJ = 25°C
TA = Tlow to Thigh
Frequency Change with Voltage (VCC = 12 V to 25 V)
Frequency Change with Temperature
TA = Tlow to Thigh
Vref
Regline
Regload
TS
Vref
Vn
S
ISC
fosc
Dfosc/DV
Dfosc/DT
4.95
4.9
− 30
47
46
5.0
5.05
4.9
2.0
20
3.0
25
0.2
5.1
4.82
50
5.0
− 85 − 180 − 30
52
57
47
60
46
0.2
1.0
5.0
5.0
5.1
2.0
20
3.0
25
0.2
5.18
50
5.0
− 85 − 180
52
57
60
0.2
1.0
5.0
Oscillator Voltage Swing (Peak−to−Peak)
Discharge Current (Vosc = 2.0 V)
TJ = 25°C
TA = Tlow to Thigh
Vosc
1.6
1.6
Idischg
7.5
8.4
9.3
7.5
8.4
9.3
7.2
9.5
7.2
9.5
ERROR AMPLIFIER SECTION
Voltage Feedback Input (VO = 2.5 V)
VFB
2.45
2.5
2.55 2.42
2.5
2.58
Input Bias Current (VFB = 2.7 V)
IIB
−0.1 −1.0
−0.1 −2.0
Open Loop Voltage Gain (VO = 2.0 V to 4.0 V)
AVOL
65
90
65
90
Unity Gain Bandwidth (TJ = 25°C)
BW
0.7
1.0
0.7
1.0
Power Supply Rejection Ratio (VCC = 12 V to 25 V) PSRR
60
70
60
70
Output Current
Sink (VO = 1.1 V, VFB = 2.7 V)
Source (VO = 5.0 V, VFB = 2.3 V)
ISink
2.0
12
2.0
12
ISource
−0.5 −1.0
−0.5 −1.0
Output Voltage Swing
High State (RL = 15 k to ground, VFB = 2.3 V)
Low State (RL = 15 k to Vref, VFB = 2.7 V)
VOH
5.0
6.2
5.0
6.2
VOL
0.8
1.1
0.8
1.1
2. Adjust VCC above the Startup threshold before setting to 15 V.
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for UC3842A, UC3843A
−25°C for UC2842A, UC2843A
Thigh = +70°C for UC3842A, UC3843A
+85°C for UC2842A, UC2843A
Unit
V
mV
mV
mV/°C
V
mV
mV
mA
kHz
%
%
V
mA
V
mA
dB
MHz
dB
mA
V
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