UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
Figure 10: Output Saturation Voltagevs. Load
Figure 11: Supply Current vs. Supply Voltage.
Current.
V
(V)
D95IN342
I
sat
D95IN341
i
(mA)
Source Saturation
(Load to Ground)
V
i
-1
-2
T =25°C
A
T =-40°C
A
20
15
V
i
=15V
80µs Pulsed Load 120Hz Rate
3
2
1
0
R
C
V
=10K
T
10
5
=3.3nF
T
T =-40°C
A
=0V
FB
I
=0V
Sense
T =25°C
A
T =25°C
A
Sink Saturation
(Load to V)
GND
i
0
0
10
20
30
V (V)
i
0
200
400
600
I (mA)
O
Figure 12: Output Waveform.
Figure 13: Output Cross Conduction
Vi =30V
CL = 15pF
TA = 25°C
Vi =15V
CL = 1.0nF
TA = 25°C
90%
VO
20V/DIV
ICC
10%
100mA/DIV
50ns/DIV
100ns/DIV
Figure 14:
Oscillator and Output Waveforms.
Vi
7
CT
8
5V REG
OUTPUT
PWM
6
RT
OUTPUT
LARGE RT/SMALL CT
CLOCK
4
OSCILLATOR
CT
ID
CT
OUTPUT
5
SMALL RT/LARGE CT
GND
D95IN344
7/15
STMICROELECTRONICS [ ST ]
