lt3750 Linear Technology Corporation, lt3750 Datasheet - Page 13

• Manufacturer Part Number: lt3750
• Description: Capacitor Charger Controller
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIO S
100
60
50
90
80
70
0
50
6A Charging Efficiency
100
V
V
V
TRANS
TRANS
TRANS
V
OUT
150
= 12V
= 18V
(V)
= 6V
200
V
TRANS
12V
V
250
CC
3750 TA03b
U
300
C1
10µF
OFF ON
C1: 25V X5R OR X7R CERAMIC CAPACITOR
C2: 25V X5R OR X7R CERAMIC CAPACITOR
C3: 25V SANYO OS-CON 25SVP56M
C4: 330V RUBYCON PHOTOFLASH CAPACITOR
D1: DIODES INC. MURS160
M1: PHILIPS PHT6NQ10T
T1: TDK DCT20EFD-U32S003 FLYBACK TRANSFORMER
300
250
200
150
100
50
0
100k
0
V
TRANS
300V, 6A Capacitor Charger
V
DONE
CHARGE
CC
C2
10µF
GND
0.1
= 18V
V
LT3750
TRANS
6A Charge Time
TIME (SECONDS)
SOURCE
0.2
RBG
RV
RDCM
GATE
V
OUT
2.49k
TRANS
0.3
V
TRANS
= 12V
C3
56µF
×2
60.4k
43k
100pF
= 6V
0.4
7, 8, 9, 10
3, 4, 5, 6
3750 TA03c
3750 TA03a
0.5
•
1:10
T1
M1
12mΩ
NMOS DRAIN
NMOS DRAIN
•
1
12
D1
CURRENT
VOLTAGE
20V/DIV
2A/DIV
+
C4
100µF
V
300V
OUT
Typical Switching Waveforms
5µs/DIV
LT3750
13
3750 TA03d
3750fa