UC3842T STMICROELECTRONICS [STMicroelectronics], UC3842T Datasheet - Page 9

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

Figure 19 : Isolated MOSFET Drive and Current Transformer Sensing.
Figure 18 : Slope Compensation Techniques.
R
I
S
S
5.0V ref
+
+
-
-
R
R
SLOPE
1
COMP/LATCH
S
R
Q
+
-
R
C
I
R
SENSE
T
T
V
V
T
REG
CC
/C
7
T
8
4
3
UC3842T
D95IN349
5
GND
6
3
C
BOUNDARY
ISOLATION
R
U3842T - UC3843T - UC3844T - UC3845T
R
S
R
I
S
S
R
R
SLOPE
1
N
S
Q1
V
in
N
P
R
C
I
R
SENSE
T
T
V
T
REG
+
0
-
/C
I
pk
50% DC
T
=
V
8
4
3
V
(pin 1)
GS
3R
UC3842T
Waveforms
S
-1.4
5
+
0
-
GND
( )
D99IN1059
25% DC
N
N
S
P
9/15