UBA1707 NXP Semiconductors, UBA1707 Datasheet - Page 20

• Manufacturer Part Number: UBA1707
• Description: Cordless Telephone, Answering Machine Line Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1999 Feb 17
handbook, full pagewidth
Cordless telephone, answering machine
line interface
The line current value can be calculated from I
When power is delivered to a loudspeaker with R
I
line
(mA)
V
I LN
ref
140
120
100
=
80
60
40
20
=
I
--------------------------------------------------------------------------------------------- -
LN
2
------------------------------------------
2
R
2
V
SET
CC
R
2
with power delivered to the loudspeaker
L
+
R
3
I
R
SLPE
LN
SET
with maximum power dissipated by the loudspeaker amplifier (dotted line given for V
+
V
LN
4
–
V
SLPE
(4)
where R
Fig.15 Safe operating area (UBA1707TS).
LN
5
L
value as follows:
V ref
impedance, the curves must be shifted to the left by:
SET
(3)
is the resistive part of Z
6
(2)
20
7
(1)
SET
no power delivered to the loudspeaker
.
8
LINE
(1)
(2)
(3)
(4)
9
CC
= 5.5 V, R
T
10
amb
45
55
65
75
V LN
( C)
L
= 16 ).
Product specification
V SLPE (V)
11
UBA1707
P
tot
MGK715
666
583
500
416
(mW)
12