16
LT1684
1684f LT/TP 0300 4K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1999
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
TYPICAL APPLICATIO
U
5V Input Nonisolated 5 REN Ring Generator
IN B
C1
100pF
C2
100pF
PWM
INPUT
+
V
IN
5V
–
R4
10k
LT1684
COMP1
COMP2
LIM
–
V
–
GATE
–
AT
REF
IN A
BG
OUT
AMPIN
GATE
+
V
+
LIM
+
OUT
C3 100pF
C4 20pF
R2
10k
R3
5k
FB1
C8
1µF
C13 0.1µF
R1
2k
C5
4700pF
C7
6.8nF
160V
C6
6.8nF
160V
R6
3k
D1
1N4001
DS2
D1N5817
DS1
MBRS1100
DZ1
60V
MMSZ5264BT1
–100V
100V
R5
300k
R10
100k
M2
IRF9610
R7
100Ω
R9
100k
R8
100Ω
M1
IRF610
C11
0.47µF
160V
C10
0.47µF
160V
T1
COILTRONICS
CTX 14468-X1
12
10
9
7
4, 5
1, 2
+
+
C12
220µF
35V
+
D2
MURS160T3
D3
MURS160T3
V
IN
FB
SW
V
C
LT1271
U1
GND
4
1
5
2
3
V
CC
+IN B
OUT A
V
EE
LT1211
1
4
8
OUT B
–IN A
27
–IN B+IN A
36
5
C9
0.1µF
R11
470Ω
R12
5k
D4
D1N4148
D5
D1N4148
R15
12k
R16
1M
R13
12k
R14
1M
RING TONE
OUT
1684 TA02
•
•
•
FB1: FERRONICS FMB1601 (716) 388-1020
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