Datasheet

LTC3766
55
3766fa
For more information www.linear.com/LTC3766
Typical applicaTions
36V-60V to 32V at 10A 320W Isolated P/A Power Supply
SGND PGND
GND PGND
LTC3766
SW SG
I
S
–
I
S
+
RUN
10nF
220pF
100pF
1µF
D1
+V
IN
–V
IN
33nF
27.4k
100Ω
8.25k
66.5k
2.43k
56µF 50V: SUNCON 50HV56M
D1-D2: ZHCS506
D3-D6: BAS21
L1: VISHAY IHLP6060DZER1R8M11
L2: COILCRAFT SER2814H-103
L3: COOPER SD25-681
Q1-Q6: BSC190N15NS3
T1: PULSE PA0905NL
T2: PULSE PA0510NL
T3: ICE CT102-100 (1:100)
SSFLT
15.0k
60.4k
8.66k
1.54M
604Ω
205k
33.2k
47k
27.4k
3.09k
3766 TA05a
31.6k1k
RCORE FS/UV
13k
10k
IRF6217
Q1
Q2
0.22µF
250V
2.2µF
100V
×3
2.2µF
100V
0.56Ω
1/8W
4.22Ω
DELAY IN
–
V
CC
PT
+
FB
REGSD MODE
SS I
S
–
PT
–
FGD
SGD
FS/SYNC
I
PK
ITH V
SEC
PHASE
V
S
–
V
S
+
RUN
IN
+
NDRV
FDC2512
AG
PG
100Ω
ES1PD
100Ω
100Ω
4mΩ
1W
165Ω
1/8W
33nF
200V
T1T3
D6
I
S
+
+V
IN
36V TO 60V
330Ω
1/8W
L1
1.8µH
6T
2T
D4
D3
D5
Q3
Q4
Q5
Q6
+V
OUT
32V
10A
–V
OUT
+V
OUT
+V
OUT
4T
ISMAG
+V
IN
2.2nF
250VAC
2.2nF
0.1µF
T2
2.5:2
1nF
D2
1µF
0.1µF
3.3nF
I
S
+
I
S
+
V
CC
V
AUX
NDRV
FG V
IN
1µF
3.9V
4.7µF
L3
680µH
33nF NPO
1.5nF
LTC3765
0.1µF
200k
1nF
•
•
•
•
•
••
L2
10µH
4.7µF
50V
×4
0.1µF
50V
56µF
50V
×2
8.66k
1/8W
2.94k
+
FCX491A
330pF
Efficiency vs Load Current
LOAD CURRENT (A)
2
EFFICIENCY (%)
93
94
10
3766 TA05b
92
91
4
6
8
96
V
IN
= 48V
95