Rainbow Electronics MAX5051 - Manual (Page 18)

MAX5051
Parallelable, Clamped Two-Switch
Power-Supply Controller IC
18 ______________________________________________________________________________________
REG5
R21
24.9k
Ω
1%
C1
100pF
1
RCOSC
+V
IN
TP1
R25
100k
Ω
C2
390pF
3
RCFF
5
CSS
4
COM
6
COMP
7
FB
8
REG5
2
SYNCOUT
C5 4700pF
D8
21
R15 31.6k
Ω
1%
R16
10.5k
Ω
1%
C4
4.7
µ F
REG5
REG5
9
REG9
C3
4.7
µ F
REG9
10
PVIN
C6
0.1
µ F
PVIN
11
STT
12
LXVDD
13
LXH
C18 100pF
R27 10
Ω
C19 1µ
F
LXH
TP3
14
LXL
R3 2.2k
Ω
R11 360
Ω
C17 0.33
µ F
C24 1000pF
4 3
1 2
U2
R20 0Ω R19 475
Ω
R12
100k
Ω
1%
C27
0.15
µ F
C36
0.22
µ F
C28
0.047
µ F
R1
11.5k
Ω
1%
R2 2.55k
Ω
1%
V OUT
R23 10
Ω
TRIM
SENSE (+)
SENSE (-)
R24 10
Ω
3 52
1 4
OUT
IN
PGND
GND
FB
U3
REG9
C26 0.1
µ F
C22
2200pF
2kV
SYNCIN
28
GND
24
AV
IN
23
BST
22
DRVH
21
XFRMRH
20
UVLO
25
FL
TINT
27
ST
AR
TUP
ON/OFF
26
R4
1M
Ω
1%
R6 1M
Ω
1%
C7
0.22
µ
F
+V
IN
+VIN
REG9
+V
IN
R5
38.3k
Ω
1%
D1
R7 0Ω
R8
8.2
Ω
2
C8
4.7
µ F
XFRMRH
DRVB
19
DRVDD
18
PGND
17
DRVL
16
CS
15
IC_P
ADDLE
DRVB
REG9
C9 1µ
F R14 150
Ω R9
8.2
Ω
C20
220pF
D3
12
6
5
4
1
2
3
7
8
N2
R17
0.027
Ω
1%
C21
4.7
µ F
80V
R18 4.7
Ω
PVIN
+V
IN
R22 15k
Ω
1 2
1 6
D5
4T
R13 47
Ω
C34 330pF
2 5 8T
D7
1 2
3 2
1
4
5 6
6
7
8
N3 D4
1 2
3 2
1
4
5
7
8
N4
R10 20
Ω
C23 1000pF
8 10 2T
T1
L1
2.4
µ
H
5V 5V
5V
C29 0.1
µ F
3 2 1
1 2 3
4 5 6
6 5 4
N_OUT P_OUT V+
GND
IN- IN+
U4
U5
V+ P_OUT M_OUT
IN+ IN-
GND
U7
C30 0.1
µ F
5V
C31 0.1
µ F
5 4 3
1 2
VCC OUT GND
U1: MAX5051 U2: PS2913-1-M U3: MAX8515 U4, U7: MAX5048A U5: MAX5023M U6: PS9715 N1, N2: SI4486 N3, N4: SI4864 N5: BSS123
AN CA
U6
LXH
R26 560
Ω R28 2k
Ω
C13 270
µ
F
4V
C14 270
µ F
4V
C15 270
µ F
4V
C33 1µ
F
10V
V OUT
VOUT SGND
5V
+V
IN
C16 3.3
µ F
21
D6
C35 1µ
F
C32 1µ
F
1 2 3 4
8 7 6 5
IN
OUT WDI N.C.
EN GND RESET
HOLD
21
D2
N1
3
2 1
8
7 6
5
4
XFRMRH
XFRMRH
C10 0.47
µ F
100V
C11 0.47
µ F
100V
C12 1µ
F
100V
C25 0.07
µ F
100V
-V
IN
+V
IN
N5
3 2
1
R29 1Ω
XFRMRH
DRVB
MAX5051
U1
REG5
V
OUT
V OUT
Figure 8. Schematic of a 48V Input 3.3V at 15A Output Synchronously Rectified, Isolated Power Supply