u4090b-p ATMEL Corporation, u4090b-p Datasheet - Page 7

• Manufacturer Part Number: u4090b-p
• Description: U4090b-p Monolithic Integrated Feature Phone Circuit Emi Improved
• Manufacturer: ATMEL Corporation

Figure 3-1.
Figure 3-2.
4741C–CORD–11/05
V
L
DC Line Interface with Electronic Inductance and Generation of a Regulated and an Unregulated Supply
Supply Capacitors CMPS and CB Are Charged with Priority on CMPS
10 SENSE
R
10 µF
R
C
SENSE
DC
IND
IND
VMPS < 6.3V
Charge CMPS
=
(IMPSOPT)
< 5 mA
I
BOPT
R
30 k
+
-
30
Y
V
OFFS
Y
N
VSENSE - VMPS > 200 mV
VSENSE - VB > 200 mV
VB < 6.3V
Charge CB
(IBOPT)
N
Y
Y
+
-
+
-
I
< 5 mA
MPSOPT
N
N
3.3V
=
(IMPSOPT = 0)
IMPSOPT = 0
Reduce IBOPT
7.0V
IBOPT = 0
6.3V
3.3V/
2 mA
V
V
MP
B
V
MPS
470 µF
47 µF
220 µF
U4090B-P
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