UBA1707 Просмотр технического описания (PDF) - Philips Electronics

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UBA1707

Cordless telephone, answering machine line interface

Philips Electronics 

Philips Semiconductors

Cordless telephone, answering machine

line interface

Product specification

UBA1707

150

handbook, full pagewidth

ILN

(mA)

130

110

no power delivered to the loudspeaker

MGK714

(4)

(3)

(2)

(1)

90

70

with power delivered to the loudspeaker

50

∆ Vref

30

2

3

4

5

6

7

8

9

10

11

12

VLN − VSLPE (V)

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

Iline = I--L---N-----×-----(---R-----S---E---T----+-----R---R-S---L-S--P-E--E-T--)----+-----V-----L--N-----–----V----S---L---P---E-- where RSET is the resistive part of ZSET.

LINE

(1)

(2)

(3)

(4)

Tamb (°C)

45

55

65

75

Ptot (mW)

1 000

875

750

625

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

∆Vref = -2----×-----π----2-V---×-C---R-C---2-L----×-----I--L--N-- with maximum power dissipated by the loudspeaker amplifier (dotted line given for VCC = 5.5 V, RL = 16 Ω).

Fig.14 Safe operating area (UBA1707T).

1999 Feb 17

19

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