TDA8920C NXP Semiconductors, TDA8920C Datasheet - Page 5

• Manufacturer Part Number: TDA8920C
• Description: The TDA8920C is a high-efficiency class-D audio power amplifier
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
TDA8920C_2
Product data sheet
7.2 Pin description
8.1 General
Table 3.
The TDA8920C is a two-channel audio power amplifier that uses class-D technology.
For each channel, the audio input signal is converted into a digital PWM signal using an
analog input stage and a PWM modulator; see
transistors, the digital PWM signal is fed to a control and handshake block and to high-
and low-side driver circuits. This level-shifts the low-power digital PWM signal from a logic
level to a high-power PWM signal switching between the main supply lines.
A 2nd-order low-pass filter converts the PWM signal to an analog audio signal that can be
used to drive a loudspeaker.
Symbol
VSSA
SGND
VDDA
IN2M
IN2P
MODE
OSC
IN1P
IN1M
n.c.
n.c.
n.c.
PROT
VDDP1
BOOT1
OUT1
VSSP1
STABI
n.c.
VSSP2
OUT2
BOOT2
VDDP2
VSSD
Pin
TDA8920CTH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin description
Rev. 02 — 11 June 2009
TDA8920CJ
18
19
20
21
22
23
1
2
3
4
5
6
7
8
9
10
11
12
-
13
14
15
16
17
Description
negative analog supply voltage
signal ground
positive analog supply voltage
channel 2 negative audio input
channel 2 positive audio input
mode selection input: Standby, Mute or Operating
mode
oscillator frequency adjustment or tracking input
channel 1 positive audio input
channel 1 negative audio input
not connected
not connected
not connected
decoupling capacitor for protection (OCP)
channel 1 positive power supply voltage
channel 1 bootstrap capacitor
channel 1 PWM output
channel 1 negative power supply voltage
decoupling of internal stabilizer for logic supply
not connected
channel 2 negative power supply voltage
channel 2 PWM output
channel 2 bootstrap capacitor
channel 2 positive power supply voltage
negative digital supply voltage
Figure
2
1. To drive the output power
110 W class-D power amplifier
TDA8920C
© NXP B.V. 2009. All rights reserved.
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