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TDF8591TH Datasheet(PDF) 3 Page - NXP Semiconductors

Part # TDF8591TH
Description  2 X 100 W SE (4 OHM) or 1 X 310 W BTL (4 OHM) class-D amplifier
PDF  34 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

TDF8591TH Datasheet(HTML) 3 Page - NXP Semiconductors

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TDF8591TH_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 5 March 2008
3 of 34
NXP Semiconductors
TDF8591TH
2
× 100 W SE (4 Ω) or 1 × 310 W BTL (4 Ω) class-D amplifier
5.2 Pin description
[1]
The heatsink is internally connected to VSSD.
6.
Functional description
6.1 Introduction
The TDF8591TH is a dual channel audio power amplifier using class-D technology. The
audio input signal is converted into a Pulse Width Modulated (PWM) signal via an analog
input stage and PWM modulator. To enable the output power transistors to be driven, this
digital PWM signal is applied to a control and handshake block and driver circuits for both
the high-side and low-side. An external 2nd-order low-pass filter converts the PWM output
signal to an analog audio signal across the loudspeakers.
Table 2.
Pin description
Symbol
Pin
Description
VSSA2
1
negative analog supply voltage for channel 2
SGND2
2
signal ground for channel 2
VDDA2
3
positive analog supply voltage for channel 2
IN2M
4
negative audio input for channel 2
IN2P
5
positive audio input for channel 2
MODE
6
mode selection input: standby, mute or operating
OSC
7
oscillator frequency adjustment or tracking input
IN1P
8
positive audio input for channel 1
IN1M
9
negative audio input for channel 1
VDDA1
10
positive analog supply voltage for channel 1
SGND1
11
signal ground for channel 1
VSSA1
12
negative analog supply voltage for channel 1
DIAG
13
diagnostic for activated current protection
VDDP1
14
positive power supply voltage for channel 1
BOOT1
15
bootstrap capacitor for channel 1
OUT1
16
PWM output from channel 1
VSSP1
17
negative power supply voltage for channel 1
STABI
18
decoupling of internal stabilizer for logic supply
n.c.
19
not connected
VSSP2
20
negative power supply voltage for channel 2
OUT2
21
PWM output from channel 2
BOOT2
22
bootstrap capacitor for channel 2
VDDP2
23
positive power supply voltage for channel 2
VSSD
24
negative digital supply voltage[1]



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