Rainbow Electronics MAX5953D - Manual (Page 13)

MAX5953A/MAX5953B/MAX5953C/MAX5953D
IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
______________________________________________________________________________________ 13
PGOOD
V+ UVLO
R1* OPEN
R3
(R
DISC
)
25.5k
Ω
C2
22
µ
F
63V
R5
200k
Ω
C3
220pF
C4
4.7
µ
F
C5
6800pF
R6
24.9k
Ω
R7
1.78k
Ω
*R1 AND R2 ARE OPTIONAL AND WHEN USED, THEY MUST TOT
AL 25.5k
Ω
AND REPLACE R3, 25.5k
Ω
.
C1
68nF
D1
60V
-48V
RT
N
-48V
R2* OPEN
R4
(R
RCLASS
)
255
Ω
4 6 8
RCLASS
18
DCUVLO 37
R16
316k
Ω
R17
14.7k
Ω
HVIN 39
DRNH
PPWM
BST
C11 0.1
µ
F
D2
D3
C12A 47
µ
F
33, 34
21
36
XFRMRH
31, 32
XFRMRL
28, 29
INBIAS
40
R13 15
Ω
D6
V EE
10
RCFF
44
RAMP
45
DRVIN
30
GA
TE
9
OUT
16
REGOUT
FL
TINT
43
42
24
RT
C
T
CSS
22
GND
25
OPTO
41
C6
0.1
µ
F
C7 100pF
R9 1M
Ω
C8 0.1
µ F
23
PGND
PGND
E
U2
FOD2712
C
LED
FB
GND
COMP
20
CS
26, 27
SRC
C9
220pF
R10
100
Ω
R11 0.1
Ω
R8 OPEN
C10
0.33
µ F
R12
604
Ω
R16 562
Ω
C16
0.15
µ
F
C17
0.047
µ F
R15 16.2k
Ω
R14 143k
Ω
D4
22T
25T 11T
C15 1µ
F
C12B 47
µ F
C13 0.1
µ
F
OUT SGND
C14 0.0047
µ F
MAX5953A
Figure 3. Typical Application Circuit