uc3842td STMicroelectronics, uc3842td Datasheet - Page 3
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uc3842td
Manufacturer Part Number
uc3842td
Description
High Performance Current Mode Pwm Controller
Manufacturer
STMicroelectronics
Datasheet
1.UC3842TD.pdf
(15 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
UC3842TD
Manufacturer:
ST
Quantity:
20 000
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
Symbol
R
V
f
PSRR
f
th j-amb
OSC
V
I
OSC
SVR
f
dischg
REF
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
25V
10KHz T
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
2
3
5
–
1
–
1
3
1
Max.
-180
5.15
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