20
MX-D1
MX-D1
IC118, 119: YDA134-E (MAIN P.C.B)
Digital Audio Power Amplifier Driver
8 CDO
24 PVDD
23 OUTH
10 CDI
15 DVDD
17 DVSS
13 CKOUT
Off time
generating circuit
Power supply
voltage detection
circuit
Over current
detection control
circuit
Over current detection part
VREF
Generating circuit
Pre Buffer part
5
VREF
1
AVDD
2
AVSS
6
INN
3
INP
Comparator for
differential input
Comparator for over
current detection
Comparator for over
current release
+
–
18
OCREF
19
OCDET
11
OCPN
+
–
12
CKIN
21 OUTL
20 PVSS
14 CAPRST
–
+
AVSS
AVDD
AVSS
AVDD
AVDD
AVSS
6V
No.
Name
I/O
Function
1
AVDD
Positive Power Supply for Analog Circuits
2
AVSS
Connecting Reference Potential for Analog Circuits
3
INP
AI
Analog Signal Input (Positive Logic)
4
NC
–
(Unconnected)
5
VREF
AO
Constant Voltage VREF Output
6
INN
AI
Analog Signal Input (Negative Logic)
7
NC
–
(Unconnected)
8
CDO
O
Output Off Time Trigger Output
9
NC
–
(Unconnected)
10
CDI
I
Output Off Time Trigger Input
11
OCPN
O
Over Current Detection Signal Output
12
CKIN
I
D-d synch. Signal Input
13
CKOUT
O
D-d synch. Signal Output
14
CAPRST
AIO
Connecting OCP Cancel Time Setting Capacitor
15
DVDD
Positive Power Supply for Digital Circuits
16
NC
–
(Unconnected)
17
DVSS
Connecting Reference Potential for Digital Circuits
18
OCREF
AI
Connecting Reference Potential for Over Current Protection
19
OCDET
AI
Over Current Detection Input
20
PVSS
Connecting Reference Potential for Power MOSFET Drive Output
21
OUTL
O
Power MOSFET Drive Pull-down Output
22
NC
–
(Unconnected)
23
OUTH
O
Power MOSFET Drive Pull-up Output
24
PVDD
Positive Power Supply for Power MOSFET Drive Output
Note)
AO : Analog Output
AI
: Analog Input
AIO : Analog Input/Output
PVDD, AVDD and DVDD are shortcircuited on the board.
PVSS, AVSS and DVSS are shortcircuited on the board.