TDA1551 데이터 시트보기 (PDF) - Philips Electronics

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TDA1551

2 x 22 W BTL car radio power amplifier with diagnostic facility

Philips Electronics 

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

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