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PDF TDA1551Q Data sheet ( Hoja de datos )
| Número de pieza | TDA1551Q | |
| Descripción | 2 x 22 W BTL car radio power amplifier with diagnostic facility | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TDA1551Q
2 x 22 W BTL car radio power
amplifier with diagnostic facility
Preliminary specification
File under Integrated Circuits, IC01
July 1994
1 page  
Philips Semiconductors
2 x 22 W BTL car radio power amplifier
with diagnostic facility
Preliminary specification
TDA1551Q
FUNCTIONAL DESCRIPTION
The TDA1551Q contains four identical amplifiers with differential input stages (two inverting and two non-inverting) which
can be used in SE or BTL applications. The gain of each amplifier is fixed at 20 dB for SE and 26 dB for BTL. The device
also contains an I2C-bus facility which operates in the read or write mode.
In the write mode the device can be switched to either the sleep condition (low sleep current of 0.6 mA typ.), the MUTE
condition or the ON condition.
In the read mode an 8-bit status word is available. Data bits D0 to D3 contain status information of each of the 4 outputs.
If the device is switched to the ON or MUTE condition and there is a short-circuit at one or more outputs, the power
transistors will be outside their safe operating area consequently one or more bits of D0 to D3 will be HIGH. Bits D0 to
D3 are LOW when in the normal safe operating area. Bit D4 is normally LOW if one or more channels reaches the clipping
level D4 will go HIGH. Bit D5 is normally LOW, if the crystal temperature reaches 150 °C D5 will go HIGH. After a
power-on reset bit 7 will go HIGH and a dip in the power supply will be noticed. Bit 7 will go LOW after the I2C-bus is
read. When pin 9 is LOW the device will switch OFF and the supply current will be reduced to 0.1 mA (max.).
handbookv, hiratulfpaalgjeunction 6
4 K/W
8 10 12
0.8 K/W
0.1 K/W
MLA009
Fig.3 Thermal equivalent resistance network.
July 1994
5
5 Page 
Philips Semiconductors
2 x 22 W BTL car radio power amplifier
with diagnostic facility
Preliminary specification
TDA1551Q
Table 2 READ definition (R/W = HIGH)
D7(1)(2)
D6 D5(3)(4)
D4(5)(6)
Notes
1. LOW after reading I2C-bus.
2. HIGH after power-on reset.
3. LOW if crystal temperature < 150°C.
4. HIGH if crystal temperature reaches 150°C.
5. LOW if not clipping.
6. HIGH if one or more channels are clipping.
7. output status information.
D3(7)
D2(7)
D2(7)
If the device is sinewave driven bit D4 will be HIGH if the THD in one or more channels exceeds 3.5%.
Table 3 Fault conditions
DATA
MSB
D3 D2 D1 D0
FUNCTION
0 0 0 0 all output power transistors in the normal
safe operating condition
− − − 1 fault condition pin 6
− − 1 − fault condition pin 8
− 1 − − fault condition pin 10
1 − − − fault condition pin 12
If more outputs are in a fault condition (e.g. short-circuit) then more bits, D3 to D0, will be HIGH.
D0(7)
July 1994
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TDA1551Q.PDF ] | |
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