25
MZ-E909
IC901 XPC18A32AFCR2
56
55
42 41
40
VLON
XWK1
XWK2
XWK3
XWK4
VSTV
7
VRMC
GND
8
VL
VLO
9
10
VL
11
L2
12
PGND2
13
PGND2
VIF
VA
VAFB
VDFB
VIFFB
GND
VC
VCO
VCOUT
L1
VC
NC
PGND1
PGND1
14
15
16
17
18
19
20
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
1
2
3
4
5
6
54
53
52
51
50
49
48
47
46
45
44
43
L1
RF1
INM1
DTC1
DTC2
RF2
INM2
PWM1
PWM2
VG
LG
PGND2
L2
NC
NC
VD
VC2
XRST
CRST
RSTREF
VREF
VB
GND
CLKSEL
VAIFON
FFCLR
SLEEP
CLK
SERIAL PASS
REGULATOR VA
SERIAL PASS
REGULATOR VD
SERIAL PASS
REGULATOR VIF
BANDGAP
REFERENCE
VC
XRST (INT)
VC
VC
VSTB VC
VB
POWER
SWITCH 1
VG
STEP-UP
PRE DRIVEER
VG
STEP-UP
PRE DRIVEER
PWM
VG
VC
VG
VG
VC
STEP-UP
DC/DC
CONVERTOR
START-UP
VC
VB
VB
VG
VG
STEP-UP
PRE DRIVEER
PWER
SWITCH 2
VG
VC VB
VC
VSTB
CONTROL
VC
IC902 XC6368B101MR
Vref WITH
SOFT START,
CE
PHASE
COMPENSATION
PWM
COMPARATOR
ERROR AMP.
PWM/PFM
CONTROLLER
RAMP WAVE
GENERATOR,
OSC
BUFFER,
DRIVER
5
3
2
1
FB
VDD
CE
EXT
+
–
+
–
4 GND
Summary of Contents for Walkman MZ-E909
Page 32: ...32 MZ E909 ...