Datasheet

LTC3766
56
3766fa
For more information www.linear.com/LTC3766
36V-60V to 14V at 25A 350W Isolated Bus Converter
Typical applicaTions
Efficiency vs Load Current
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
11k
66.5k
2.43k
68µF 16V: SANYO 16TQC68M
D1-D2: ZHCS506
D5: BAS21
L1: VISHAY IHLP4040DZER1R8M11
L2: COILCRAFT SER2814L-472KL
Q1-Q3: BSC190N15NS3
Q4-Q7: BSC057N08NS3
T1: PULSE PA0956NL
T2: PULSE PA0510NL
T3: ICE CT102-100 (1:100)
SSFLT
15.0k
60.4k
604Ω
150k
10k
27.4k
3766 TA06a
13.7k
RCORE FS/UV
14k
10k
IRF6217
Q1
Q2
Q3
0.22µF
250V
2.2µF
100V
×3
2.2µF
100V
0.68Ω
1/8W
4.22Ω
432Ω
1/8W
DELAY IN
–
V
CC
PT
+
FB
MODE
SS I
S
–
PT
–
FGD
SGD
FS/SYNC
I
PK
ITH V
SEC
PHASE
V
S
–
REGSD
V
S
+
RUN
IN
+
NDRV
FDC2512
AG
PG
100Ω
ES1PD
100Ω
100Ω
4mΩ
1W
165Ω
1/8W
1.00k
1/8W
33nF
200V
T1
T3
I
S
+
+V
IN
36V TO 60V
L1
1.8µH
3T
Q4
Q5
Q6
Q7
10nF
200V
+V
OUT
14V
25A
–V
OUT
+V
OUT
+V
OUT
5T
ISMAG
+V
IN
2.2nF
250VAC
4.7nF
0.1µF
T2
2.5:2
1nF
D2
1µF
3.3nF
I
S
+
D5
V
CC
NDRV
FG V
IN
4.7µF
33nF NPO
I
S
+
1nF
LTC3767
0.1µF
200k
1nF
68µF
16V
×4
22µF
16V
×4
••
•
•
••
L2
4.7µH
ES1PD
5.1k
1W
+
FCX491A
LOAD CURRENT (A)
0
91
EFFICIENCY (%)
92
93
94
95
96
5
10 15 20
3766 TA06b
25 30
V
IN
= 48V