Philips HTS5120/98, Руководство по обслуживанию

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IC6: TDA8920 IC Specification
Block Diagram
OUT1
VSSP1
VDDP2
DRIVER
HIGH
MBL461
OUT2
BOOT2
TDA8920TH
BOOT1
DRIVER
LOW
RELEASE1
SWITCH1
ENABLE1
CONTROL
AND
HANDSHAKE
PWM
MODULATOR
MANAGER OSCILLATOR
TEMPERATURE SENSOR
CURRENT PROTECTION
STABI
MODE
INPUT
STAGE
mute
9
8
IN1 −
IN1+
22
21
20 17
16
15
VSSP2 VSSP1
DRIVER
HIGH
DRIVER
LOW
RELEASE2
SWITCH2
ENABLE2
CONTROL
AND
HANDSHAKE
PWM
MODULATOR
11
SGND1
7
OSC
2
SGND2
6
MODE
INPUT
STAGE
mute
5
4
IN2 −
IN2+
19 24
VSSD
HW
1
VSSA2
12
VSSA1
3
VDDA2
10
VDDA1
23 13 4 1 8 1
VDDP2
PROT STABI
VDDP1
SYMBOL PIN DESCRIPTION
V
SSA2
1 negative analog supply voltage for
channel 2
SGND2 2 signal ground channel 2
V
DDA2
3 positive analog supply voltage for
channel 2
IN2 − 4 negative audio input for channel 2
IN2+ 5 positive audio input for channel 2
MODE 6 mode select input
(standby/mute/operating)
OSC 7 oscillator frequency adjustment or
tracking input
IN1+ 8 positive audio input for channel 1
IN1 − 9 negative audio input for channel 1
V
DDA1
10 positive analog supply voltage for
channel 1
SGND1 11 signal ground for channel 1
V
SSA1
12 negative analog supply voltage for
channel 1
PROT 13 time constant capacitor for
protection delay
V
DDP1
14 positive power supply for
channel 1
BOOT1 15 bootstrap capacitor for channel 1
OUT1 16 PWM output from channel 1
V
SSP1
17 negative power supply voltage for
channel 1
STABI 18 decoupling internal stabilizer for
logic supply
HW 19 handle wafer; must be connected
to pin 24
V
SSP2
20 negative power supply voltage for
channel 2
OUT2 21 PWM output from channel 2
BOOT2 22 bootstrap capacitor for channel 2
V
DDP2
23 positive power supply voltage for
channel 2
V
SSD
24 negative digital supply voltage
MBL462
HW
PROT
BOOT1
VDDP1
VSSP1
OUT1
BOOT2
VSSP2
OUT2
VSSD
VDDP2
STABI
MODE
VSSA1
VDDA1
SGND1
IN1+
IN1 −
VDDA2
IN2+
IN2 −
VSSA2
SGND2
OSC
TDA8920TH
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Fig.2 Pin configuration.
(1) Pin 19 should be connected to pin 24 in the application.
Pining