Philips Semiconductors Linear Products
Product specification
Current-mode PWM controller
UC3842
DC AND AC ELECTRICAL CHARACTERISTICS
0≤T
J
≤70°C
for UC3842; V
CC
=15V; R
T
=10kW; C
T
=3.3nF, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
UC3842
Min
Typ
Max
UNIT
Reference section
V
OUT
Output voltage
Line regulation
Load regulation
Temp. stability
1
Total output variation
1
V
NOISE
Output noise voltage
1
Long-term stability
1
Output short-circuit
Output short-circuit
Line, load, temp.
10Hz≤f≤10kHz, T
J
=25°C
T
J
=125°C, 1000 Hrs.
T
J
=25
-55<T
J
≤0°C
T
J
=25°C
12≤V
CC
≤25V
T
MIN
≤T
J
≤T
MAX
V
PIN 4
peak-to-peak
V Pin 1=2.5V
2≤V
O
≤4V
Unity gain bandwidth
1
Unity gain bandwidth
PSRR
I
SINK
I
SOURCE
Power supply rejection ratio
Output sink current
Output source current
V
OUT
High
V
OUT
Low
T
J
=25°C
T
MIN
<T
J
<T
MAX
12≤V
CC
≤25V
V
PIN 2
=2.7V, V
PIN 1
=1.1V
V
PIN 2
=2.3V, V
PIN 1
=5V
V
PIN 2
=2.3V, R
L
=15k to ground
V
PIN 2
=2.7V, R
L
=15k to Pin 8
2.85
V
PIN 1
=5V
12≤V
CC
≤25V
0.9
2.42
-30
-30
4.82
50
5
-100
-100
25
-130
-180
T
J
=25°C, I
O
=1mA
12≤V
IN
≤25V
1≤I
O
≤20mA
4.90
5.00
6
6
0.2
5.10
20
25
0.4
5.18
V
mV
mV
mV/°C
V
µV
mV
mA
mA
Oscillator section
Initial accuracy
Voltage stability
Temp. stability
1
Amplitude
47
52
0.2
5
1.7
57
1
kHz
%
%
V
Error amp section
Input voltage
I
BIAS
A
VOL
Input bias current
65
0.7
0.5
60
2
-0.5
5
70
6
-0.8
6
0.7
1.1
2.50
-0.3
90
1
2.58
-2
V
µA
dB
MHz
MHz
dB
mA
mA
V
V
Current sense section
Gain
2, 3
Maximum input signal
2
PSRR
I
BIAS
Power supply rejection ratio
2
Input bias current
Delay to output
1
3
1
70
-2
150
-10
300
3.15
1.1
V/V
V
dB
µA
ns
August 31, 1994
1102
PHILIPS [ NXP SEMICONDUCTORS ]
