STA333BW datasheet(14/64 Pages) STMICROELECTRONICS

14 / 64 page

Electrical specifications

STA333BW

14/64

IVCC

Supply current from Vcc in power

down

PWRDN = 0

0.1

Supply current from Vcc in

operation

PCM input signal = -60 dBFS,

Switching frequency = 384 kHz

No LC filters

IVDD

Supply current DDX processing

(reference only)

Internal clock = 49.152 MHz

Ilim

Overcurrent limit

(2)

2.2

3.0

4.0

Isc

Short circuit protection

Hi-Z output

2.7

3.6

UVL

Under-voltage protection

3.5

4.3

tmin

Output minimum pulse width

No load

Dynamic range

100

SNR

Signal to noise ratio, ternary

mode

A-Weighted

100

Signal to noise ratio binary mode

PSSR

Power supply rejection ratio

DDX stereo mode, <5 kHz

VRIPPLE = 1 V RMS

Audio input = dither only

THD+N

Total harmonic distortion + noise

DDX stereo mode, Po=1 W

f = 1 kHz

0.2

XTALK

Crosstalk

DDX stereo mode, <5 kHz

One channel driven @ 1 W

Other channel measured

Peak efficiency, DDX mode

Po = 2 x 20 W, 8

Ω

Peak efficiency,binary modes

Po = 2 x 9 W @ 4

Ω, 1 x 20 W

@ 8

Ω

Refer to Figure 4: Test circuit 1.

Limit current if the register (OCRB par 6.1.3.3) overcurrent warning detect adjustment bypass is enabled. When disabled

refer to the Isc.

Table 6.

Electrical characteristics power section (continued)

VCC= 18 V, f = 1 kHz, fsw = 384 kHz, Tamb = 25 °C, RL = 8 Ω unless otherwise specified

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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