TDF8599B NXP Semiconductors, TDF8599B Datasheet - Page 35

• Manufacturer Part Number: TDF8599B
• Description: The TDF8599B 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
TDF8599B_1
Product data sheet
Fig 28. P
(W)
P
(1) R
(2) R
(3) R
150
120
o
90
60
30
0
8
THD = 0.5 %.
R
t
THD = 0.5 %
w(min)
DSon
L
L
L
o
= 1 .
= 2 .
= 4 .
as a function of V
= 190 ns and I
= 0.1
14.2 Output power estimation (Parallel mode)
14.3 Output current limiting
12
(at T
Figure 28
THD = 10 % as a function of the supply voltage for different load impedances in parallel
mode.
The peak output current is internally limited to 8 A maximum. During normal operation, the
output current should not exceed this threshold level otherwise the output signal will be
distorted. The peak output current can be estimated using
Example: A 2
is triggered.
Current limiting (clipping) avoids audio holes but can cause distortion similar to voltage
clipping. In Parallel mode, the output current is internally limited above 16 A.
I
o
•
•
•
•
•
j
(1)
(2)
(3)
= 100 C), R
O(ocp)
I
V
R
R
R
16
----------------------------------------------------- -
R
o
P
L
DSon
s
L
= output current (A)
P
= series resistance of output inductor ( )
= supply voltage (V)
= load impedance ( )
+
= 16 A (minimum).
in parallel mode with
2
and
= on-resistance of power switch ( )
s
V
20
R
= 0.025 ,
Figure 29
P
DSon
speaker can be used with a supply voltage of 19 V before current limiting
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V
P
(V)
+
R
24
s
Rev. 01 — 29 July 2009
show the estimated output power at THD = 0.5 % and
8 A
I
2
C-bus controlled dual channel class-D power amplifier
Fig 29. P
(W)
P
(1) R
(2) R
(3) R
o
180
150
120
90
60
30
0
8
THD = 10 %.
R
t
THD = 10 %
w(min)
DSon
L
L
L
o
= 1 .
= 2 .
= 4 .
as a function of V
= 190 ns and I
= 0.1
12
(at T
j
(1)
(2)
(3)
Equation
= 100 C), R
O(ocp)
16
P
= 16 A (minimum).
parallel mode with
TDF8599B
6:
s
20
= 0.025 ,
© NXP B.V. 2009. All rights reserved.
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P
(V)
24
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