TFA9810 NXP Semiconductors, TFA9810 Datasheet - Page 19

• Manufacturer Part Number: TFA9810
• Description: The TFA9810 is a two-channel power comparator for high-efficiency class D audioamplifier systems
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TFA9810_3
Product data sheet
14.2 Output current limiting
The peak output current is internally limited above a level of 3 A minimum. During normal
operation the output current should not exceed this threshold level of 3 A, otherwise the
output signal will be distorted. The peak output current in BTL can be estimated using
Equation
Where:
I
O
Fig 26. BTL output power as function of supply voltage: THD = 0.5 %. 3 A
Fig 27. BTL output power as function of supply voltage: THD = 10 %. 3 A
•
max
V
P
(W)
P
(W)
= supply voltage (V
P
o
o
----------------------------------------------------- -
R
25
20
15
10
(1) R
(2) R
(3) R
30
20
10
(1) R
(2) R
(3) R
3:
5
0
0
L
8
8
+
L
L
L
L
L
L
2
= 8
= 4
= 6
= 4
= 6
= 8
V
R
P
DSon
Rev. 03 — 20 February 2008
+
R
DDPx
s
3 A
12
12
V
(1)
(1)
SSPx
) [V].
(2)
16
16
(2)
Audio amplifier 2 x 12 W
V
V
P
P
(V)
(V)
010aaa019
010aaa020
© NXP B.V. 2008. All rights reserved.
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