30
PRS-500
IC203 SN74LVC138APWR-12
G2B
G2A
G1
C
B
A
Y7
GND
Y6
Y5
Y4
Y3
Y2
Y1
Y0
VCC
1
2
3
4
5
6
7
8
15
16
14
13
12
11
10
9
Vref with
Soft Start,
CE
PWM/PFM
Selector
Ramp Wave
Generator
OSC
CE/MODE
Control
Logic
Phase
Compesation
Synch.
Buffer
Drive
Current Feedback
Current Limit
Logic
Logic
Lx(SW)
5
CE/MODE(EN) 3
VIN
1
VSS
2
-
+
-
+
-
+
R2
R1
R4
R3
Vout(CE)
4
IC402 XC9226A296MR, IC403 XC9226A1M6MR
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