AN2406 Datasheet, PDF (1/5 Pages) STMicroelectronics – TS4962IQ class D audio amplifier

AN2406
Application note
TS4962IQ class D audio amplifier
Evaluation board user guidelines
Features
■ TS4962IQ low voltage class D differential audio power amplifier with standby mode
■ Operating range from Vcc=2.4V to 5.5V
■ 2.2W output power @ Vcc=5V, THD=1%, F=1kHz, with 4Ω load
■ 1.4W output power @ Vcc=5V, THD=1%, F=1kHz, with 8Ω load
■ Ultra low power consumption in standby mode (10nA)
■ 63dB PSRR @ 217Hz in grounded mode (Av=2V/V)
■ Low pop & click
■ Fast startup time: 5ms
■ Module gain set at 2V/V
Description
This mono class D demoboard is designed for the TS4962IQ class D audio amplifier. The
TS4962IQ device, in a DFN package, is mounted on a two-layer PCB with two power planes
acting as a heatsink.
Figure 1. shows the schematic diagram of the demoboard.
Figure 1. Schematic diagram of the mono class D demoboard
Vcc
Cn4
1
2
3
C3
1uF
Cn2
Cn1
Positive input
1
2
Negative Input
3
Input
C1
100nF
GND
100nF
C2
GND
GND
R1
150k
R2
150k
1 ^Stdby Internal
Bias
150k
4_-
In-
In+ ₊
3
PWM
150k
Oscillator
Cn3
Vcc
Cn6
Gnd
6 U1
Vcc
Out+
5
Output
H
Bridge
8
Out-
Cn5
Positive Output
Negative Output
Speaker
GND
7
GND
TS4962DFN
April 2007
Rev 2
1/5
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