tfa9810t-n1 NXP Semiconductors, tfa9810t-n1 Datasheet - Page 5

• Manufacturer Part Number: tfa9810t-n1
• Description: Tfa9810 Stereo Full-bridge Audio Amplifier 2 X 12 W
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
TFA9810_2
Preliminary data sheet
8.1 General
8.2 Interfacing
Table 3.
The TFA9810 is a dual-switching power comparator. It is the main building block for a
stereo high-efficiency Class D audio power amplifier system. It contains two full-bridge
BTL power stages, drive logic, protection-control logic and full differential input
comparators and references (see
closed-loop self-oscillating digital amplifier system or open-loop system can be built. A
second-order low-pass filter converts the Pulse Width Modulation (PWM) output signal
into an analog audio signal across the speaker.
The pins ENABLE and SO/OL control the operating mode of the TFA9810. Both the
ENABLE and the SO/OL pins refer to V
When the SO/OL pin is connected to V
the SO/OL pin is floating the TFA9810 is in open-loop mode.
The TEST pin needs to be connected to ground in both situations.
Table 4.
The device has two modes: SLEEP and OPERATING.
Symbol
IN2N
IN2P
STAB2
V
BOOT2N
OUT2N
BOOT2P
OUT2P
V
V
OUT1P
BOOT1P
OUT1N
BOOT1N
V
STAB1
Interfacing
SO/OL connected to
V
Open
SSP2
DDP2
DDP1
SSP1
SSD(HW)
Pin description
SO/OL connections
Pin
14
15
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Rev. 02 — 30 August 2007
…continued
Description
Negative input comparator channel 2
Positive input comparator channel 2
Decoupling of internal 11 V regulator for channel 2 drivers
Negative power-supply voltage channel 2
Bootstrap high-side driver negative output channel 2
Negative output channel 2
Bootstrap high-side driver positive output channel 2
Positive output channel 2
Positive supply voltage power channel 2
Positive power supply voltage channel 1
Positive output channel 1
Bootstrap high-side driver positive output channel 1
Negative output channel 1
Bootstrap high-side driver negative output channel 1
Negative supply voltage power channel 1
Decoupling of internal 11 V regulator for channel 1 drivers
Figure
SSA
SSD(HW)
1). By using this power comparator a compact
the TFA9810 is in self-oscillating mode: when
CONFIGURATION
Self-oscillating
Open-loop
.
Audio amplifier 2 x 12 W
© NXP B.V. 2007. All rights reserved.
TFA9810
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