E-UC3844BD1 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
E-UC3844BD1 Datasheet PDF : 15 Pages
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UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
Figure 15 : Error Amp Configuration.
2.5V
+
Zi
VFB 2
-
COMP 1
Zf
1mA
D95IN345
Figure 16 : Under Voltage Lockout.
7
ON/OFF COMMAND
Vi
TO REST OF IC
ICC
VON
VOFF
UC3842B UC3843B
UC3844B UC3845B
16V
8.4V
10V
7.6V
<17mA
<0.5mA
D95IN346
VOFF VON
VCC
During UVLO, the Output is low
Figure 17 : Current Sense Circuit .
ERROR
AMPL.
2R
IS
1
COMP
R
R
3
CURRENT
RS
C
SENSE
5
GND
D95IN347
Peak current (is) is determined by the formula
IS
max
≈
1.0 V
RS
A small RC filter may be required to suppress switch transients.
8/15
1V
CURRENT
SENSE
COMPARATOR
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