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TDA8922C датащи(PDF) 5 Page - NXP Semiconductors |
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TDA8922C датащи(HTML) 5 Page - NXP Semiconductors |
5 / 40 page TDA8922C_1 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 01 — 7 September 2009 5 of 40 NXP Semiconductors TDA8922C 2 × 75 W class-D power amplifier 7.2 Pin description 8. Functional description 8.1 General The TDA8922C is a two-channel audio power amplifier that uses Class D technology. For each channel, the audio input signal is converted into a digital Pulse Width Modulation (PWM) signal using an analog input stage and a PWM modulator; see Figure 1. To drive the output power 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 second order low-pass filter converts the PWM signal to an analog audio signal that can be used to drive a loudspeaker. Table 3. Pin description Symbol Pin Description TDA8922CTH TDA8922CJ VSSA 1 18 negative analog supply voltage SGND 2 19 signal ground VDDA 3 20 positive analog supply voltage IN2M 4 21 channel 2 negative audio input IN2P 5 22 channel 2 positive audio input MODE 6 23 mode selection input: Standby, Mute or Operating mode OSC 7 1 oscillator frequency adjustment or tracking input IN1P 8 2 channel 1 positive audio input IN1M 9 3 channel 1 negative audio input n.c. 10 4 not connected n.c. 11 5 not connected n.c. 12 6 not connected PROT 13 7 decoupling capacitor for protection (OCP) VDDP1 14 8 channel 1 positive power supply voltage BOOT1 15 9 channel 1 bootstrap capacitor OUT1 16 10 channel 1 PWM output VSSP1 17 11 channel 1 negative power supply voltage STABI 18 12 decoupling of internal stabilizer for logic supply n.c. 19 - not connected VSSP2 20 13 channel 2 negative power supply voltage OUT2 21 14 channel 2 PWM output BOOT2 22 15 channel 2 bootstrap capacitor VDDP2 23 16 channel 2 positive power supply voltage VSSD 24 17 negative digital supply voltage |
Аналогичный номер детали - TDA8922C |
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Аналогичное описание - TDA8922C |
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