uc3842td STMicroelectronics, uc3842td Datasheet - Page 8

• Manufacturer Part Number: uc3842td
• Description: High Performance Current Mode Pwm Controller
• Manufacturer: STMicroelectronics

Figure 16 : Under Voltage Lockout.
UC3842T - UC3843T - UC3844T - UC3845T
Figure 17 : Current Sense Circuit .
Peak current (i
A small RC filter may be required to suppress switch transients.
8/15
Figure 15 : Error Amp Configuration.
I
S max
V
i
1.0 V
R
s
S
R
) is determined by the formula
S
7
I
S
R
C
V
V
OFF
D95IN347
ON
Z
i
ON/OFF COMMAND
TO REST OF IC
CURRENT
UC3842T
UC3844T
SENSE
COMP
16V
10V
GND
Z
f
1
3
5
COMP
UC3843T
UC3845T
8.4V
7.6V
V
FB
ERROR
AMPL.
2
1
2.5V
<0.5mA
<17mA
D99IN1058
+
-
I
CC
2R
R
V
OFF
1V
During UVLO, the Output is low
D95IN345
1mA
V
ON
COMPARATOR
CURRENT
SENSE
V
CC