TDF8599A NXP Semiconductors, TDF8599A Datasheet - Page 33

• Manufacturer Part Number: TDF8599A
• Description: The TDF8599A is a dual Bridge-Tied Load (BTL) car audio amplifier comprising anNDMOST-NDMOST output stage based on SOI BCDMOS technology
• Manufacturer: NXP Semiconductors

NXP Semiconductors
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14. Application information
TDF8599A_2
Product data sheet
Total harmonic distortion is measured at the bandwidth of 22 Hz to 20 kHz, AES brick wall. The maximum limit is guaranteed but may
not be 100 % tested.
V
B = 22 Hz to 20 kHz, AES brick wall, R
B = 22 Hz to 20 kHz, AES brick wall, independent of R
V
ripple
i
= V
i(max)
= V
ripple(max)
= 0.5 V RMS.
14.1 Output power estimation (Stereo mode)
= 2 V (p-p); R
The output power, just before clipping, can be estimated using
Where,
The output power at 10 % THD can be estimated by:
P
Figure 26
THD = 10 % as a function of supply voltage for different load impedances in stereo mode.
P
•
•
•
•
•
•
o(1)
o
=
V
R
R
R
t
f
w(min)
osc
= 0.5 % and P
P
L
DSon
s
--------------------------------------------------------------------------------------------------------------------------------------- - W
= series resistance of the output inductor ( )
= load impedance ( )
= supply voltage (V)
s
= oscillator frequency in Hz (typically 320 kHz)
----------------------------------------------------- -
R
= 0 .
L
and
= minimum pulse width(s) depending on output current (s)
= drain source on-state resistance ( )
+
s
2
= 0 .
Figure 27
R
R
L
DSon
o(2)
= 10 %.
Rev. 02 — 30 June 2009
+
show the estimated output power at THD = 0.5 % and
s
.
R
s
2
I
2
C-bus controlled dual channel class-D power amplifier
R
1 t
L
–
w min
--------- -
f
osc
2
V
P
P
o 2
2
=
1.25 P
Equation
TDF8599A
o 1
© NXP B.V. 2009. All rights reserved.
5:
where
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