Datasheet

LT3748
29
3748fb
For more information www.linear.com/LT3748
typical applications
Figure 21. 5V, 8A Isolated Supply with Synchronous Secondary-Side Rectification Using LT8309
EFFICIENCY (%)
I
LOAD
(A)
90
92
76
1 2 3 4 5 6 7 8
84
82
80
78
88
86
90
V
IN
= 36V
V
IN
= 48V
V
IN
= 72V
LT8309 & MOSFET
PDS760
DIODE
Figure 22. Efficiency of the Supply in Figure 21 as well as Performance Using a Conventional PDS760 Schottky Rectifier
INTV
CC
V
CC
V
OUT
+
5V, 8A
V
OUT
–
D5
V
IN
36V TO
72V
GATE
3784 TA21
DRAIN
GND
120pF
100Ω
6.04k
147k
LT8309
•
•
0.22µF
28k
12.1k
15nF
0.012Ω
GATE
SENSE
R
REF
INTV
CC
V
C
SS
TC
EN/UVLO
R
FB
GND
LT3748
5.33:1:2.67
PA1735NL
3Ω
2.15k
4.7µF
M1 M2
4.7µF
910µF
470pF
1.2M
51k
62µF
1µF D6
4.7nF
D1
D2
D4
68Ω
D3
V
IN
D1: SMBJ85A-13-F
D2: CMMRIU-02
D3: BAV20W-7-F
D4: BAV20W-7-F
D5: CMZ5919B
D6: CMHZ5258B
M1: BSC320N20NS3G
M2: BSC028N06NS
•
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.