TFA9812HN PHILIPS [NXP Semiconductors], TFA9812HN Datasheet - Page 49

• Manufacturer Part Number: TFA9812HN
• Description: BTL stereo Class-D audio amplifier with I2S input
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
Table 57.
V
unless otherwise specified.
[1]
[2]
[3]
14. Application information
TFA9812_2
Preliminary data sheet
Symbol
t
t
t
t
t
C
SU;STO
BUF
SU;DAT
HD;DAT
SP
DDD(3V3)
b
C
After this period, the first clock pulse is generated.
To be suppressed by the input filter.
b
is the total capacitance of one bus line in pF. The maximum capacitive load for each bus line is 400 pF.
= V
Characteristics I
DDA(3V3)
Parameter
set-up time for STOP condition
bus free time between a STOP and
START condition
data set-up time
data hold time
pulse width of spikes that must be
suppressed by the input filter
capacitive load for each bus line
14.1 Output power estimation
= 2.7 V to 3.6 V; V
The output power just before clipping can be estimated using
Where:
V
R
R
R
P
Fig 10. Timing
P
O
L
DSon
S
(0.5%)
= supply voltage (V) (V
= load impedance ( ).
= Series resistance output inductor ( ).
2
SDA
SCL
C bus interface; see
= ‘On’ resistance power switch ( ).
=
P
--------------------------------------------------------------------------------------------- -
DDA
t
BUF
----------------------------------------------------
R
L
= V
S
+
2
DDP
Rev. 02 — 22 January 2009
Conditions
t
t
LOW
HD;STA
R
R
= 8 V to 20 V;T
Figure 10
DSon
L
DDP
2 R
-V
+
t
HD;DAT
t
r
R
SSP
L
S
…continued
).
BTL stereo Class-D audio amplifier with I
amb
t
max
HIGH
= 20 C to +85 C; all voltages referenced to ground;
V
t
f
P
t
SU;DAT
[3]
2
Min
0.6
1.3
100
0
0
-
t
SU;STA
Sr
Equation
t
HD;STA
Typ
-
-
-
-
-
-
t
© NXP B.V. 2009. All rights reserved.
TFA9812
SU;STO
10:
t
SP
Max
-
-
-
-
50
400
010aaa225
P
2
S input
49 of 66
Unit
ns
ns
pF
s
s
s
(10)