Kenwood DVR-8100 Service Manual page 13

QQ
3 7 63 1515 0
4-9 Digital Power Amplifier : TA2022 (X09, IC501~503)
Pin No. Pin Name
1,13 VBOOT(2,1)
2 VN10
3 VN10GND
4,12 VPP(1,2)
5 VN10SW
6 NC
7,10 OUT(2,1)
8,9 VNN(2,1)
11 NC
14 VN10FDBK
15,20 AGND
16,21 V5
17 REF
18 VNNSENSE
19 VPPSENSE
22,25 OAOUT(1,2)
23,26 INV(1,2)
24 MUTE
27 BIASCAP
28,29 FBKGND2,FBKOUT2
TE
L 13942296513
30,31 FBKGND1,FBKOUT1
32 HMUTE
www
.
CIRCUIT DESCRIPTION
I/O
- Bootstrap voltages for gate drive of high side MOSFET's.
Floating supply input. Normally connected to the output of onboard VN10
I
buck converter. This voltage must be stable and referenced to VNN.
- Power ground for onboard VN10 generator.
I Positive power supply input pins.
O Switching output voltage for onboard VN10 generator (buck converter).
- Not connected internally.
O Power amplifier outputs.
I Negative power supply input pins.
- Not connected internally.
- Feedback for onboard VN10 generator (nominally 11V above VNN).
- Analog ground.
I 5V power supply input.
- Used to set internal bias current. The pin voltage is typically 1.1V.
Negative supply voltage sense input.
I
This pin is used for both over and under voltage sensing for the VNN supply.
Positive supply voltage sense input.
I
This pin is used for both over and under voltage sensing for the VPP supply.
O Outputs of input stage ope amplifiers.
I Inverting inputs of input stage ope amplifier.
I Logic input. A logic high puts the amplifier in mute mode.
Bandgap reference times two (typically 2.5VDC).
-
Used to set the common mode voltage for the input ope amplifier.
O Output voltage differential feedback for channel 2.
O Output voltage differential feedback for channel 1.
Logic output. A logic high indicates both amplifiers are muted, due to
O the mute pin state, or a fault such as an overcurrent, undervoltage,
or overvoltage condition.
x ao u163
y
i
2 9
8
Pin Description
Q Q
3 6 7 1 3 1 5
co
.
DVR-8100
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
13