参数资料
型号: TFA9812HN
厂商: NXP SEMICONDUCTORS
元件分类: 音频/视频放大
英文描述: 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48
封装: 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT619-8, HVQFN-48
文件页数: 44/66页
文件大小: 386K
代理商: TFA9812HN
TFA9812_2
NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
49 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplier with I2S input
[1]
Cb is the total capacitance of one bus line in pF. The maximum capacitive load for each bus line is 400 pF.
[2]
After this period, the rst clock pulse is generated.
[3]
To be suppressed by the input lter.
14. Application information
14.1 Output power estimation
The output power just before clipping can be estimated using Equation 10:
(10)
Where:
VP = supply voltage (V) (VDDP-VSSP).
RL = load impedance ().
RDSon = ‘On’ resistance power switch ().
RS = Series resistance output inductor ().
tSU;STO
set-up time for STOP condition
0.6
-
s
tBUF
bus free time between a STOP and
START condition
1.3
-
s
tSU;DAT
data set-up time
100
-
ns
tHD;DAT
data hold time
0
-
s
tSP
pulse width of spikes that must be
suppressed by the input lter
-
50
ns
Cb
capacitive load for each bus line
-
400
pF
Table 57.
Characteristics I2C bus interface; see Figure 10 …continued
VDDD(3V3) =VDDA(3V3) = 2.7 V to 3.6 V; VDDA =VDDP = 8 V to 20 V;Tamb = 20 °C to +85 °C; all voltages referenced to ground;
unless otherwise specied.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Fig 10. Timing
tBUF
tLOW
tr
tf
tHD;STA
tSU;STA
tHD;DAT
tHIGH
tSU;DAT
tHD;STA
tSU;STO
tSP
P
S
Sr
P
SDA
SCL
010aaa225
P
O(0.5%)
R
L
R
L
2R
DSon
R
S
+
()
+
----------------------------------------------------
δ
max
V
P
2
2R
L
----------------------------------------------------------------------------------------------
=
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