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3. DC/DC Converter : XC6365D103M (TX-RX Unit IC402)
3-1. Block Diagram
Phase
compensation
Error amp
+
5
FB
–
Vref with
PWM/PFM
CE
3
soft start,
controller
CE
4. VCO : L78-0500-05 (TX-RX Unit L702)
4-1. Schematic Diagram
C19
C1
D2
L1
R1
MOD1
1
R2
MOD2
2
C21
3
GND
C9
D4
L6
CV
4
SEMICONDUCTOR DATA
2
VDD
PWM
comparator
+
Buffer
1
EXT/
–
driver
Ramp wave
generator,
3
GND
OSC
L4
R4
C5
C7
L3
Q1
L9
R6
C13
C15
L8
Q2
3-2. Pin Assignment
Pin No.
Pin Name
1
EXT/
External transistor connection
2
VDD
Power supply
3
GND
Ground
4
CE
Chip enable
5
FB
Output voltage set-up external
Q5
Q4
L12
8
R8
7
6
C17
5
Q3
TK-5400
Function
OUT
GND
4C
TA
15
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