UC3842T STMICROELECTRONICS [STMicroelectronics], UC3842T Datasheet - Page 3

• Manufacturer Part Number: UC3842T
• Description: HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

THERMAL DATA
ELECTRICAL CHARACTERISTICS ( [note 1] Unless otherwise stated, these specifications apply for
0 < T
REFERENCE SECTION
OSCILLATOR SECTION
ERROR AMP SECTION
CURRENT SENSE SECTION
Symbol
R
Symbol
V
f
PSRR
f
th j-amb
I
OSC
OSC
V
SVR
f
REF
dischg
BW
V
V
I
OSC
G
e
V
V
OSC
SC
I
I
I
I
amb
REF
REF
b
o
o
b
N
2
V
3
/ V
/ T
/ T Temperature Stability
< 105°C; V
Thermal Resistance Junction-ambient.
Line Regulation
Load Regulation
Total Output Variation
Output Noise Voltage
Long Term Stability
Output Short Circuit
Frequency
Frequency Change with Volt.
Frequency Change with Temp.
Oscillator Voltage Swing
Discharge Current (V
Input Voltage
Input Bias Current
A
Unity Gain Bandwidth
Power Supply Rejec. Ratio
Output Sink Current
Output Source Current
V
V
Gain
Maximum Input Signal
Supply Voltage Rejection
Input Bias Current
Delay to Output
VOL
OUT
OUT
High
Low
i
Parameter
= 15V (note 5); R
OSC
=2V)
Description
T
= 10K; C
12V
1
(Note 2)
Line, Load, Temperature
10Hz
(note 2)
T
T
T
T
V
T
(peak to peak)
T
V
V
2V
T
12V
V
V
V
R
V
R
(note 3 & 4)
V
12
J
amb
j
A
A
A
J
CC
PIN1
FB
PIN2
PIN2
PIN2
PIN2
PIN1
L
L
= 25 C
= 25°C (R
= 25°C
= T
= T
= T
= 15K
= 15K
I
= 5V
o
= 12V to 25V
= 125 C, 1000Hrs (note 2)
V
V
= 2.3V V
= 2.5V
= 2.7V V
= 2.3V;
= 2.7V;
= 5V (note 3)
low
low
low
V
V
i
T
o
Test Conditions
f
i
20mA
i
= 3.3nF)
to T
to T
to T
25V (note 3)
4V
25V
10KHz T
25V
T
to Ground
to Pin 8
= 6.2k, C
high
high
high
U3842T - UC3843T - UC3844T - UC3845T
PIN1
PIN1
= 5V
j
= 1.1V
T
= 25 C
= 1nF)
max.
Minidip
100
Min.
4.85
2.42
2.85
225
-0.5
-30
7.3
0.7
0.9
49
48
65
60
–
–
2
5
–
Value
Typ.
-100
2.50
250
-0.1
100
SO8
0.2
0.2
1.6
6.2
0.8
50
52
90
70
12
70
150
-1
-2
3
1
2
3
5
–
1
–
1
Max.
5.15
-180
2.58
3.15
275
300
-10
8.8
1.1
1.1
20
25
25
55
56
-2
1
–
–
Unit
C/W
mV/ C
Unit
MHz
KHz
KHz
KHz
V/V
mV
mV
mV
mA
mA
mA
mA
dB
dB
dB
ns
%
%
V
V
V
V
V
V
3/15
V
A
A