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TDA1557

2 x 22 W BTL stereo car radio power amplifier with speaker protection

Philips Electronics 

Philips Semiconductors

2 x 22 W BTL stereo car radio power

amplifier with speaker protection

Product specification

TDA1557Q

AC CHARACTERISTICS

VP = 14.4 V; RL = 4 Ω; f = 1 kHz; Tamb = 25 °C; unless otherwise specified. See note 1.

SYMBOL

PARAMETER

PO

output power

THD

B

total harmonic distortion

power bandwidth

flow

fhigh

Gv

SVRR

low frequency roll-off

high frequency roll-off

closed loop voltage gain

supply voltage ripple rejection

ZI

input impedance

Vno

noise output voltage

α

∆Gv

channel separation

channel unbalance

CONDITIONS

MIN. TYP. MAX. UNIT

THD = 0.5%

15

17

−

W

THD = 10%

20

22

−

W

VP = 13.2 V; THD = 0.5% −

12

−

W

VP = 13.2 V; THD = 10% −

17

−

W

PO = 1 W

−

0.1

−

%

THD = 0.5%; PO = −1 dB −

20 to −

Hz

with respect to 15 W

15 000

−1 dB; note 5

−

25

−

Hz

−1 dB

20

−

−

kHz

45

46

47

dB

ON; note 6

ON; note 7

ON; note 8

MUTE; notes 6 and 7

stand-by; notes 6 and 7

34

−

38

−

45

−

45

−

80

−

25

30

−

dB

−

dB

−

dB

−

dB

−

dB

36

kΩ

ON; RS = 0; note 9

RS = 10 kΩ; note 9

MUTE; notes 9 & 10

−

325

500 µV

−

350

−

µV

−

180

−

µV

40

−

−

dB

−

−

1

dB

Notes to the characteristics

1. All characteristics are measured using the circuit shown in Fig.4

2. The circuit is DC adjusted at VP = 6 to 18 V and AC operating at VP = 8.5 to 18 V

3. At 18 V < VP < 30 V, the DC output voltage ≤ VP/2

4. Conditions: V11 = 0; short-circuit output to GND; switch V11 to MUTE or ON condition (rise time V11 > 10 µs).

5. Frequency response externally fixed.

6. Ripple rejection measured at the output with a source-impedance of 0 Ω (max. ripple amplitude of 2 V) and a

frequency of 100 Hz.

7. Ripple rejection measured at the output with a source-impedance of 0 Ω (max. ripple amplitude of 2 V) and a

frequency between 1 and 10 kHz.

8. Ripple rejection measured at the output with a source-impedance of 0 Ω (max. ripple amplitude of 2 V) and a

frequency between 100 Hz and 10 kHz. Pin 12 is decoupled with two diodes to ground.

9. Noise voltage measured in a bandwidth of 20 Hz to 20 kHz.

10. Noise output voltage independent of RS (Vin = 0).

May 1992

7

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