TDF8599B NXP Semiconductors, TDF8599B Datasheet - Page 6

• 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
8.2 Mode selection
The TDF8599B includes integrated common circuits for all channels such as the oscillator,
all reference sources, mode functionality and a digital timing manager. In addition, the
built-in protection includes thermal foldback, temperature, overcurrent and overvoltage
(load dump).
The TDF8599B operates in either I
DC load detection, frequency hopping and extended configuration functions are provided
together with enhanced diagnostic information.
The mode pins EN, ADS and SEL_MUTE enable mute state, I
mode switching.
Pin SEL_MUTE is used to mute and unmute the device and must be connected to an
external capacitor (C
ensure smooth fade-in and fade-out of the input signal.
The TDF8599B is enabled when pin EN is HIGH. When pin EN is LOW, the TDF8599B is
off and the supply current is at its lowest value (typically 2 A). When off, the TDF8599B is
completely deactivated and will not react to I
I
I
Table
Non-I
the default TDF8599B state is Mute mode. The amplifiers switch idle (50 % duty cycle)
and the audio signal is suppressed at the output. In addition, the capacitor (C
charged to half the supply voltage. To enter Operating mode, pin SEL_MUTE must be
HIGH with S1 open, enabling capacitor (C
Figure
I
Table 5 on page
2
2
2
Fig 3.
C-bus mode is selected by connecting a resistor between pins ADS and AGND. In
C-bus mode with pin EN HIGH, the TDF8599B waits for further commands (see
C-bus mode and non-I
2
3.3 V
4). I
a. Non-I
C-bus mode is selected by connecting pin ADS to pin AGND. In non-I
3). In addition, pin EN must be driven HIGH.
Mode selection
2
C-bus mode is described in
S2
S1
2
SEL_MUTE
C-bus mode
7. Switches S1 and S2 are shown in
C ON
EN
ON
). This capacitor generates a time constant which is used to
Rev. 01 — 29 July 2009
2
TDF8599B
C-bus mode control are described in
AGND
I
2
C-bus controlled dual channel class-D power amplifier
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2
ADS
C-bus mode or non-I
Section 9 on page
ON
2
) charged by an internal pull-up (see
C-bus commands.
3.3 V
b. I
Figure
See
R
S2
2
C ON
C-bus mode
ADS
2
C-bus mode. In I
SEL_MUTE
23.
Table 13
.
3.
2
C-bus mode and Operating
Table 4 on page 7
EN
for detailed information on
TDF8599B
TDF8599B
© NXP B.V. 2009. All rights reserved.
AGND
2
C-bus mode,
2
C-bus mode,
SVRR
ADS
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and
) is
R ADS
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