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TDA8552TS/N1

2 × 1.4 W BTL audio amplifiers with digital volume control and headphone sensing

Philips Electronics 

Philips Semiconductors

2 × 1.4 W BTL audio amplifiers with digital

volume control and headphone sensing

Preliminary specification

TDA8552T; TDA8552TS

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX. UNIT

Volume control

tW

pulse width

50

trep

pulse repetition time

100

Vth(up)

UP/DOWN pin UP threshold

4.1

level

Vfloat(max)

UP/DOWN pin floating high

−

level

Vfloat(min)

UP/DOWN pin floating low

1.0

level

Vth(down)

UP/DOWN pin DOWN

0

threshold level

II(up/down)

twait

trep

input current UP/DOWN pin 0 < VUP/DOWN < VDD

−

auto repeat wait time

−

repeat time

key pressed

−

Volume attenuator

Gv(l)

low gain; maximum volume

19

(including power amplifier)

low gain; minimum volume

tbf

(including power amplifier)

Gv(h)

high gain; maximum volume

29

(including power amplifier)

high gain; minimum volume

tbf

(including power amplifier)

Nstep

number of gain steps

−

∆Gv

variation of gain per step

−

Zi

input impedance

14

Vi(max)(rms)

maximum input voltage

−

(RMS value)

−

−

ns

−

−

ns

−

VDD

V

−

3.4

V

−

−

V

−

0.6

V

−

200

µA

500

−

ms

130

−

ms

20

21

dB

−60

tbf

dB

30

31

dB

−50

tbf

dB

64

−

1.25

−

dB

20

−

kΩ

−

1.75

V

Notes

1. With a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal

to

2

×





D-----C------o---u----t-p----u---t---Ro----f-Lf--s---e---t----v---o---l-t--a---g----e--





2. The DC output voltage with respect to ground is approximately 0.5VDD.

3. Output voltage in mute position is measured with an input of 1 V (RMS) in a bandwidth of 20 kHz, so including noise,

gain select pin is LOW (0 V).

1998 Jun 02

10

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