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TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 3 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
4. Quick reference data
[1] I
P
is the current through the analog supply voltage (V
DDA
) pin added to the current through the power supply
voltage (V
DDP
) pin.
Table 1. Quick reference table
Unless specified otherwise, V
DDA
=V
DDP
=12V,V
SSP1
=V
SSP2
=0V,V
DDA(3V3)
=V
DDD(3V3)
= 3.3 V,
V
SS1
=V
SS2
= REFD = REFA = 0 V, T
amb
=25
°
C, R
L
=8
Ω
,f
i
= 1 kHz, f
s
= 44.1 kHz, f
sw
= 400 kHz,
24-bit I
2
S input data, MCLK clock mode, typical application diagram (Figure 13).
Symbol Parameter Conditions Min Typ Max Unit
General
V
DDA
analog supply
voltage
81220V
V
DDP
power supply
voltage
81220V
V
DDA(3V3)
analog supply
voltage (3.3 V)
3.0 3.3 3.6 V
V
DDD(3V3)
digital supply
voltage (3.3 V)
3.0 3.3 3.6 V
I
P
supply current soft mute mode, with load,
filter and snubbers
connected
[1]
-3845mA
sleep mode
[1]
- 160 270 µA
I
DDA(3V3)
analog supply
current (3.3 V)
operating mode
I
2
S slave mode - 2 4 mA
I
2
S master mode - 4 6 mA
sleep mode
V
DDA
=V
DDP
= 12 V - 120 - µA
V
DDA
=V
DDP
= 1 V - 40 70 µA
I
DDD(3V3)
digital supply
current (3.3 V)
operating mode
I
2
S slave mode - 15 25 mA
I
2
S master mode - 25 40 mA
sleep mode;
DATA = WS = BCK =
MCLK = 0 V
-430µA
P
o(RMS)
RMS output power Continuous time output power per channel; THD = 10 %;
R
L
=8Ω
V
DDA
= V
DDP
= 12 V - 8.3 - W
V
DDA
= V
DDP
= 13.5 V - 10 - W
V
DDA
= V
DDP
= 15 V - 12 - W
Short time (≤ 10 s) output power per channel; THD = 10 %;
R
L
=8Ω
V
DDA
= V
DDP
= 17 V - 15 - W
η
po
output power
efficiency
R
L
=8Ω; P
o(RMS)
= 8.3 W - 88 - %