UBA1707TS datasheet(19/36 Pages) PHILIPS

19 / 36 page

1999 Feb 17

Philips Semiconductors

Product speciﬁcation

Cordless telephone, answering machine

line interface

UBA1707

Fig.14 Safe operating area (UBA1707T).

LINE

Tamb (°C)

Ptot (mW)

(1)

1000

(2)

875

(3)

750

(4)

625

When power is delivered to a loudspeaker with RL impedance, the curves must be shifted to the left by:

with maximum power dissipated by the loudspeaker amplifier (dotted line given for VCC = 5.5 V, RL =16 Ω).

∆V

ref

------------------------------------------

The line current value can be calculated from ILN value as follows:

where RSET is the resistive part of ZSET.

line

SET

SLPE

() V

SLPE

–

SET

----------------------------------------------------------------------------------------------

handbook, full pagewidth

150

23456

MGK714

110

130

VLN − VSLPE (V)

ILN

(mA)

(1)

(2)

(3)

(4)

no power delivered to the loudspeaker

with power delivered to the loudspeaker

∆ Vref

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