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