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