★
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★
Components having special characteristics are marked
⚠
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
I
J
K
L
M
N
YMC-700/YMC-500
84
MAIN 1/5
CB1
CB2
IC1
IC3
IC13
W1
(0)
(15.4)
(2.6)
(1.3)
(0)
(0)
(1.3)
(15.4)
(0)
(0)
(1.7)
(2.2)
(4.0)
(1.6)
(0)
(59.5)
(233.2)
(163.4)
(163.4)
(233.2)
(163.3)
(59.8)
(163.7)
4.0
8.1
4.0
0
0
0
0
28.0
18.0
18.0
12.0
5.1
0
-5.0
5.1
-5.0
12.0
18.0
18.0
18.0
18.0
-18.3
-18.3
13.2
0
0
0
13.2
0
13.2
12.9
-0.2
8.7
4.2
0
8.7
0
8.7
9.5
3.3
0
3.3
0
0.8
0.9
4.8
3.3
2.0
0
0
4.2
12.9
2.9
1.8
12.4
3.3
3.3
2.6
2.6
3.3
0
0
0
5.1
6.2
6.2
0
0.8
0.9
13.2
6.2
0
1.9
1.8
8.7
2.6
0
2.6
0
0.7
0.9
13.2
1.9
1.8
28.0
13.2
1.0
0
1.7
1.1
28.0
-18.3
0.7
18.1
11.7
11.7
0
8.1
0
0
0
0
0
0
0
2.5
2.5
0
11.7
11.5
12.9
0
4.0
1.7
0
0
3.3
3.3
3.3
8.1
4.0
18.0
(0)
(15.4)
(2.2)
(4.0)
19.1
18.1
18.0
(0)
AC10.2
Primary side ground
0.8V/0.68V
8.5V/7.9V
5V VCC
ENB
5V REF
3.5V
4V
RT CT
OSC
+0.24V
R
S
QB
Q
ENB
OUT
PUT
16.5V/9V
UVLO
15.5V
15.5V
5.2 A
0.95mA
PWM
0.8V
Dmax
FA5510: 46%
FA5511: 70%
5V Controlled block
FB
(2)
REF
(7)
CS(8)
VCC(6)
OUT
(5)
GND
(4)
IS+(3)
RT(1)
FF
CMOS IC for switching power supply control
IC15
: NJM79M05FA
Voltage regulator
COMMON
OUTPUT
INPUT
IC8
:
NJM78M12FA
Voltage regulator
INPUT
OUTPUT
COMMON
IC14
:
NJM78M05FA
3-terminal positive voltage regulator
IN
OUT
GND
IC12
:
NJM7805FA
3-terminal positive voltage regulator
INPUT
OUTPUT
GND
IC4, 10, 11
: TPS54331
3A, 28V input, STEP DPWN SWIFT
TM
DC/DC converter
with ECO-MODE
TM
ECO-MODE ™
Minimum Clamp
Error
Amplifier
Shutdown
Shutdown
Logic
Shutdown
Voltage
Reference
4
SS
6
COMP
5
VSENSE
3
EN
2
VIN
1 BOOT
8 PH
7 GND
∑
+
+
–
Discharge
Logic
Maximum
Clamp
S
Q
1.25V
Enable
Threshold
Enable
Comparator
Thermal
Shutdown
165C
Boot
UVLO
Boot
Charge
VSENSE
Slope
Compensation
Oscillator
12A/V
Current
Sense
PWM
Latch
PWM
Comparator
Frequency
Shift
gm = 92μA/V
DC gain = 800 V/V
BW = 2.7MHz
Gate
Logic
Drive
R
80m-ohms
2.1V
0.8V
2 μA
1 μA
2 μA
2 k-ohms
CTL
1
2
3
4
5
Vcc
GND
TSD
OCP
Vref
-
+
Driver
VOUT
C
IC5
: BA00JC5WT-V5
Voltage regulator
IC6
: BD9781HFP-TR
Flexible step-down switching regulator
VIN
INV
FB
RT
GND
SW
EN/SYNC
SOFT
START
Vref
SYNC
ON/OFF
OSC
Vref
ERROR AMP
PWM
COMPARATOR
TSD
V
IN
LATCH
RESET
CURENT LIMIT
L:OFF
H:ON
1
6
5
3
7
DRIVER
2
4
IC13
: LMV431AIMF
Low voltage adjustable precision shunt regulator
REF
CATHODE
ANODE
IC7
: NJM431U
Adjustable precision shunt regulator
ANODE
REFERENCE
CATHODE
1
2
3
AC IN
POWER TRANSFORMER
YMC-500
to MAIN 2/5
to MAIN 2/5
to MAIN 2/5
to MAIN 2/5
to MAIN 3/5
YMC-700
w
w
w
.
x
i a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
