TDF8599A NXP Semiconductors, TDF8599A Datasheet - Page 9

• 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
TDF8599A_2
Product data sheet
Fig 6.
Fig 7.
OSCIO
max(V)
min(V)
a. Off
SSM
Spread spectrum mode
Spread spectrum operation in Master mode
100 A
8.3.3 Frequency hopping (Master mode)
The capacitor on pin SSM (C
mode is active. The current (I
gives a triangular voltage on pin SSM that sweeps around the voltage set by pin OSCSET
The spread spectrum frequency (f
where the voltage on pin OSCSET = V
I
The frequency swings between 0.95
Frequency hopping is a technique used to change the oscillator frequency for AM tuner
compatibility. In Master mode, the resistor connected between pins OSCSET and AGND
sets the oscillator frequency (f
(1.1
SSM
5 %. The voltage on pin SSM is used to modulate the oscillator frequency.
10 %. Set bit IB1[D4] to logic 1 and bit IB1[D3] to either logic 0 (0.9
OSCSET
SSM
f
SSM
= 5 A.
f
osc
=
R osc
).
----------------------------------------------------- - Hz
2 C
001aai773
SSM
C osc
I
SSM
V
Rev. 02 — 30 June 2009
1
10 %
SSM
SSM
I
osc
2
C-bus controlled dual channel class-D power amplifier
) sets the spreading frequency when Spread spectrum
). In I
) flowing in and out of pin SSM is typically 5 A. This
SSM
) can be calculated using
2
1
f
C-bus mode, this frequency can be varied by
osc
b. On
and is calculated as 100 A
and 1.05
100 A
I SSM
5 A
f
osc
; see
OSCSET
SSM
Figure
Equation
R osc
C SSM
TDF8599A
001aai774
7.
R
© NXP B.V. 2009. All rights reserved.
f
osc
osc
C osc
2:
) or logic 1
(V) with
t (ms)
001aai775
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