LTC3722-1/LTC3722-2
28
372212fb
For more information www.linear.com/LTC3722
LINEAR TECHNOLOGY CORPORATION 2009
LT 0213 REV B • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3722
PART NUMBER DESCRIPTION COMMENTS
LTC3723-1/LTC3723-2 Synchronous Push-Pull and Full-Bridge Controllers High Efficiency with On-Chip MOSFET Drivers
LTC3721-1 Non-Synchronous Push-Pull and Full-Bridge Controller Minimizes External Components, On-Chip MOSFET Drivers
LTC3765/LTC3766 Isolated Synchronous Forward Controller Chip Set Ideal for 24V or 48V Input Applications
LT1952/LT1952-1 Isolated Synchronous Forward Controllers Ideal for 24V or 48V Input Applications
LTC3901 Secondary-Side Synchronous Driver for Full-Bridge and
Push-Pull Converters
Programmable Timeout, Reverse Inductor Current Sense
LTC4440 High Voltage High Side MOSFET Driver 100V, 2.4A Pull-Up, 1.6Ω Pull-Down, SOT-23 and MSOP-8 Packages
RELATED PARTS
TYPICAL APPLICATION
1k
16
1
ADLY
20k
4.99k
150Ω
PDLY OUTB OUTD
V
REF
DPRG NC SYNC SPRGCT R
LEB
FB GND PGND SS
CS
11
14 1 24 13 5 6 23 22 7
4
3
2 8
9 20
10
18
12
17
OUTF OUTE
15 16
1
8
4
5
150k
5V
REF
SBUS
V
CC
UVLO
0.47µF
20k
1/4W
12V
V
IN
220pF
1µF
220pF
30.1k
182k
COMP
LTC3722-1
B D
Q2
4 2
3
8
1
6
D3
D5
D4
12V
7
Q4
12V
D
–V
OUT
–V
OUT
–V
OUT
I
SNS
1.10k
0.02Ω
1.5W
0.02Ω
1.5W
13k
1/2W
D1
D6
372212 TA02
+V
OUT
Si7852DP
×4
Si7852DP
×2
Q1
Q3
12V
B
Si7852DP
×2
Si7852DP
×2
Si7852DP
×4
+V
OUT
12V
35A
+V
OUT
C1, C2
180µF
16V
×2
0.47µF
100V
12V
100Ω
D9
3.3V
L4
1mH
L2
150nH
L1, 1.3µH
V
IN
36V TO
72V
+V
IN
–V
IN
D7
1
6
T2
5:5(105µH):1:1
T1
5:5(105µH):1:1
7
8
2
4
2
4
10
11
7
8
10
11
22Ω
0.1µF
T3
1(1.5mH):0.5
OUTA
21
A
OUTC
19
C
C3
68µF
20V
0.22µF
D8
1
1
7
6
5
7
8
6 5
2
3 42
750Ω
200k
330Ω
MOC207
5.1k
220pF
10k
33k
8.25k
D11
100k
180pF
2.2nF
330pF
22nF
68nF
C4
2.2nF
250V
I
SNS 5V
REF
0.047µF
220pF
D12
5.1V
V
+
COMP
R
TOP
GNDF GNDS R
MID
COLL
CSE
+
6
CSE
–
5
ME
2
8 4 10 13
330pF
1µF
1µF
7
4.02k
2.15k
ME2
3
SYCN
REF
820pF
200V
15Ω
1.5W
1µF
LT1431
V
CC
GND GND TS
IN
TG
C
BOOST
2.7k
9.53k
10k
2.49k
–V
OUT
470Ω
1/4W
4.64k
1/4W
100Ω
0.47µF, 100V = TDK C3216X7R2A474M
1µF, 100V = TDK C4532X7R2A105M
C1, C2: SANYO 16SP180M
C3: AVX TPSE686M020R0150
C4: MuRata DE2E3KH222MB3B
D1, D4, D5, D6: MURS120T3
D2, D3, D7, D8: BAS21
D9: MMBZ5226B
D10: MMBZ5240B
D11: BAT54
D12: MMBZ5231B
L1: SUMIDA CDEP105-1R3MC-50
L2: PULSE PA0651
L3: PA1294.910
L4: COILCRAFT DO1608C-105
Q1, Q2: ZETEX FMMT619
Q3, Q4: ZETEX FMMT718
T1, T2: PULSE PA0526
T3: PULSE PA0785
•
V
HIGH
L3
0.85µH
•
•
•
•
•
0.47µF
100V
4 2
3
8
1
6
D2
12V
7
Si7852DP
×2
0.22µF
V
CC
GND GND TS
IN
TGA
BOOST
LTC4440EMS8E LTC4440EMS8E
1µF
100V
1µF
100V
×4
•
+
V
HIGH
•
+
51Ω
2W
51Ω, 2W
0.47µF
100V
CSF
+
LTC3901EGN
GND PGND GND2 PGND2 TIMER
PV
CC
11
CSF
–
12
MF
14
4.02k
2.15k
MF2 V
CC
15
4.64k
1/4W
30.1k
100Ω
D10
10V
+V
OUT
MMBT3904
1M
MMBT3904
LTC3722/LTC4440 420W, 36V-72V Input to 12V/35A Isolated Full Bridge Supply
