32
PRS-500
IC408 XC61CC3202NR
VOUT
1
VIN
2
4
VSS
3
N.C.
Vref
-
+
IC803 S882150AMH-M2ZTFG
VIN
1
SW1
SW2
SW3
SW4
SWITCH
CONTROL
SCHEMATICS
SOFT START
SCHEMATICS
ON/OFF
SCHEMATICS
REFWERENCE
VOLTAGE
PFM
CONTROL
OSCILLATION
SCHEMATICS
(1.0MHz)
VOUT
6
GND
5
ON/OFF
4
C+
2
C-
3
-
+
Rs
Rf
1
OE
2
RCV
3
VP
4
VM
5
SUSPND
6
MODE
11
VPO
8
SPEED
16 SOFTCON
7
VCC
14
VOLTAGE
REGULATOR
3.3V
VCC
13
VREG
15 VPU
10
D+
9
17
D-
GND
LEVEL
SIFTER
+
-
12
VMO
IC903 ISP1105W.118
– MAIN Board –
IC802 XC61CN2502NR
VOUT
1
VIN
2
4
VSS
3
N.C.
Vref
-
+