LTC3722-1 LINER [Linear Technology], LTC3722-1 Datasheet - Page 28

• Manufacturer Part Number: LTC3722-1
• Description: Synchronous Dual Mode Phase Modulated Full Bridge Controllers
• Manufacturer: LINER [Linear Technology]

36V TO
RELATED PARTS
V
PART NUMBER
LT1681/LT3781
LTC1696
LT1910
LTC1922-1
LTC3722-1/LTC3722-2
TYPICAL APPLICATIO
28
IN
A
72V
V
1 F
IN
V
180k
–V
IN
+V
15k
15k
IN
IN
785 H
1:1
T2
30k
15.4k
15.4k
10V
0.01 F
1k
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
0.82 F
100V
D6
39
1/4W
1 F
1.3 H
100pF
L5
SBUS
SBUS
A_LEG
10
18
12
13.3k
13.3k
1k
0.1 F
SBUS
V
UVLO
5V
IN
75
1k
1 F
3 0.82 F
100V
REF
DESCRIPTION
Synchronous Forward Controller
Overvoltage Protection Controller
Protected High Side MOSFET Driver
Synchronous Phase Shift Controller
ADLY
ADLY
V
REF
B
V
11
14
IN
FAX: [phone] www.linear.com
27k
ADLY
1.5pF
100V
OUTA
DPRG
10V
10V
P_LEG
A
Q2
Q5
Q7
Q10
2
21
D3
13.3k
13.3k
1k
OUTC
NC
C
Q3
Q8
19
8
0.04
1.5W
U
PDLY
PDLY
SYNC
PDLY
1.5pF
100V
9
1
5.1k
C
680
1 F
OUTB
CT
240W, 36-72 V
ISNS
B
24
20
785 H
150pF
680
1:1
T3
P_LEG
LTC3722-1
OUTD
SPRG
D
0.01 F
17
13
10k
D7
0.04
1.5W
OUTF
R
LEB
15
252nH
5
68 F
33k
10V
20V
L2
1k
0.1 F
IN
75
+
OUTE
GND PGND SS
to 12V/20A Isolated Supply
23
0.068 F
16
COMMENTS
High Efficiency 2-Switch Forward Control
ThinSOT Package, Gate Drive for SCR Crowbar or External N-Channel MOSFET
8V-48V, Protected from –15V to 60V Transients, Auto Restart
Adaptive ZVS, Primary Side Control
22
D
1mH
L4
22
0.1 F
10V
10V
1mH 1:0.5:0.5
7
Q1
Q6
Q9
Q16
A_LEG
4
D4
1
8
D14
FB
T5
6
COMP
Q11
Q4
3
6
4
5
CS
3
ISNS 5V
330pF
D21
4.7k
1nF
MOC207
D12
D22
REF
750
7
6
5
D17
D15
4
2.2nF
7T(75 H): 6T: 6T
5
1
250V
6
2
D3, D4, D12, D14 BAS21
D6, D7, D15, D17 BAT54
D8, D9 ON-SEMI MMBD914LT1
D16, D20 MMBZ5239B
D21, D22 MURS120T3
D22 MMBZ5251B
L1,L3 PULSE PA0295
L2 PULSE PA0573
3
8
T4
100
1/4W
ALL CAPS 25V, ALL RESISTORS 0603 (1/16W) OR 0805 (1/8W)
1
2
220pF
100k
470
12
11
10
9
8
7
PRELIMINARY SCHEMATIC, UNLESS NOTED:
V HIGH
–V
3
1
4
0.1 F
OUT
LINEAR TECHNOLOGY CORPORATION 2003
OUT2
IN2
IN1
GND2
V LOW
Q12,
Q13
LTC1693-1
Q17
5
6.7 H
L3
D20
10V
GND1
OUT1
V
V
LT/TP 0203 1.5K • PRINTED IN USA
0.1 F
D8
CC2
CC1
1
7
GNDF GNDS R
L4 COILCRAFT DO1608C-105
L5 SUMIDA CDEP105-1R3MC-50
Q1, Q2, Q7,Q9 ZETEX FMMT619
Q3, Q4, Q8, Q11-Q15 Si7456 DP
Q5, Q6, Q10, Q16-Q18 ZETEX FMMT718
T2, T3 PULSE PE-68386
T4 PULSE PB2001
T5 PULSE PA0297
COLL
V
6
8
2
+
3
6
6.7 H
LT1431
COMP R
L1
200
1/4W
5
2
1k
220 F
Q14,
Q15
0.1 F
16V
Q18
REF
TOP
MID
4
7
+
D9
1/4W
51
D16
9.1V
9.53k
0.022 F
2.49k
+V
–V
372212i
OUT
OUT
12V
20A
1 F
+V
+V
–V
+V
–V
–V
OUT
OUT
OUT
OUT
10k
OUT
OUT