tea1097h NXP Semiconductors, tea1097h Datasheet - Page 9

• Manufacturer Part Number: tea1097h
• Description: Speech And Loudspeaker Amplifier Ic With Auxiliary Inputs/outputs And Analog Multiplexer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
E
The TEA1097 can be supplied by the line as well as by
external power sources (voltage or current sources) that
must be connected to pin ESI.
The IC will choose which supply to use according to the
voltage it can provide. A voltage supply on ESI is efficient
only if its value is greater than the working voltage of the
internal V
to be line powered. The current consumed on this source
is at least equal to the internal consumption. It depends on
the voltage difference between the value forced on ESI
and the working voltage of the internal stabilizer.
The current required increases with the voltage difference
to manage. The excess current compared to the internal
consumption becomes then available for other purposes
such as supplying a loudspeaker amplifier. The voltage
source should not exceed 6 V. If the value of the external
voltage source can be lower than the working voltage of
the internal stabilizer, an external diode is required to avoid
reverse current flowing into the external power supply.
In case of current source, the voltage on V
depends on the current available. It is internally limited to
6.6 V. The current source should not exceed 140 mA.
1999 Apr 08
XTERNAL SUPPLY
Speech and loudspeaker amplifier IC with
auxiliary inputs/outputs and analog multiplexer
handbook, full pagewidth
voltages
(V)
BB
8
6
4
2
0
0
voltage stabilizer. Otherwise the IC continues
(
PINS
ESI
0.01
AND
V
Fig.5 Main DC voltages as a function of line current.
BB
)
0.02
BB
and ESI
0.03
9
V
The voltage on V
with a difference equal to 250 mV (typ.) and is internally
limited to 3.35 V. This voltage is temperature
compensated. This supply point can provide a current up
to 3 mA (typ.). Its internal consumption stays low (a few
10 nA) as long as V
An external voltage can be connected on V
extra consumption on V
source should not be lower than 3.5 V and higher than 6 V.
V
currents provided either from the line or from pin ESI,
taking into account the internal current consumption.
DD
BB
and V
SUPPLY FOR MICROCONTROLLERS
0.04
DD
can supply external circuits in the limits of
DD
supply point follows the voltage on V
DD
0.05
does not exceed 1.5 V (see Fig.6).
DD
(typically 100 A). This voltage
0.06
Product specification
(
PIN
I line (A)
TEA1097
V
DD
DD
SLPE
V DD
MICS
V BB
)
FCA049
with limited
LN
0.07
BB