UC3842T Просмотр технического описания (PDF) - STMicroelectronics
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UC3842T Datasheet PDF : 15 Pages
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THERMAL DATA
Symbol
Description
Rth j-amb Thermal Resistance Junction-ambient.
U3842T - UC3843T - UC3844T - UC3845T
Minidip
max. 100
SO8
150
Unit
°C/W
ELECTRICAL CHARACTERISTICS ( [note 1] Unless otherwise stated, these specifications apply for
0 < Tamb < 105°C; Vi = 15V (note 5); RT = 10K; CT = 3.3nF)
Symbol
Parameter
REFERENCE SECTION
∆VREF Line Regulation
∆VREF Load Regulation
∆VREF/∆T Temperature Stability
Total Output Variation
eN
Output Noise Voltage
Long Term Stability
ISC Output Short Circuit
OSCILLATOR SECTION
fOSC Frequency
∆fOSC/∆V Frequency Change with Volt.
∆fOSC/∆T Frequency Change with Temp.
VOSC Oscillator Voltage Swing
Idischg Discharge Current (VOSC =2V)
ERROR AMP SECTION
V2
Input Voltage
Ib
Input Bias Current
AVOL
BW Unity Gain Bandwidth
PSRR Power Supply Rejec. Ratio
Io
Output Sink Current
Io
Output Source Current
VOUT High
VOUT Low
CURRENT SENSE SECTION
GV
Gain
V3
Maximum Input Signal
SVR Supply Voltage Rejection
Ib
Input Bias Current
Delay to Output
Test Conditions
Value
Unit
Min. Typ. Max.
12V ≤ Vi ≤ 25V
1 ≤ Io ≤ 20mA
(Note 2)
Line, Load, Temperature
10Hz ≤ f ≤ 10KHz Tj = 25°C
(note 2)
Tamb = 125°C, 1000Hrs (note 2)
2
20 mV
3
25 mV
0.2
mV/°C
4.85
5.15 V
50
µV
5
25 mV
-30 -100 -180 mA
Tj = 25°C
TA = Tlow to Thigh
TJ = 25°C (RT = 6.2k, CT = 1nF)
VCC = 12V to 25V
TA = Tlow to Thigh
(peak to peak)
TA = Tlow to Thigh
49
52
55 KHz
48
–
56 KHz
225 250 275 KHz
–
0.2
1
%
–
1
–
%
–
1.6
–
V
7.3
–
8.8 mA
VPIN1 = 2.5V
VFB = 5V
2V ≤ Vo ≤ 4V
TJ = 25°C
12V ≤ Vi ≤ 25V
VPIN2 = 2.7V VPIN1 = 1.1V
VPIN2 = 2.3V VPIN1 = 5V
VPIN2 = 2.3V;
RL = 15KΩ to Ground
VPIN2 = 2.7V;
RL = 15KΩ to Pin 8
(note 3 & 4)
VPIN1 = 5V (note 3)
12 ≤ Vi ≤ 25V (note 3)
2.42 2.50 2.58 V
-0.1
-2
µA
65
90
dB
0.7
1
MHz
60
70
dB
2
12
mA
-0.5
-1
mA
5
6.2
V
0.8
1.1
V
2.85
3
3.15 V/V
0.9
1
1.1
V
70
dB
-2
-10 µA
100 300 ns
3/15
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