LT3750 データシートの表示（PDF） - Linear Technology
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LT3750 Datasheet PDF : 16 Pages
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LT3750
TYPICAL APPLICATIO
VTRANS
VCC
12V
300V, 9A, 2.5mF Capacitor Charger
T1 D1
1:10
C2
10µF
C3 4, 5
56µF
×3
1
•+
C1
10µF
VCC
100k
VTRANS
RVOUT
DONE
RDCM
LT3750
OFF ON CHARGE
GATE
•
60.4k 6, 7
10
43k
M1
VOUT
300V
C4
2.5mF
SOURCE
GND
RBG
2.49k
100pF
8mΩ
3750 TA05a
C1, C2: 25V X5R OR X7R CERAMIC CAPACITOR D1: DIODES INC. MURS160
C3: 25V SANYO OS-CON 25SVP56M
M1: PHILIPS PHM21NQ15T
C4: CORNELL DUBILIER 7P252V360N082
T1: MIDCOM 32052 FLYBACK TRANSFORMER
Efficiency
100
95
VTRANS = 18V
90
VTRANS = 12V
85
VTRANS = 6V
80
75
70
0
50 100 150 200 250 300
VOUT (V)
3750 TA05b
Charge Time
300
VTRANS = 18V
250
VTRANS = 12V
200
VTRANS = 6V
150
100
50
0
012345678
TIME (SECONDS)
3750 TA05c
RELATED PARTS
PART NUMBER
LT3420/LT3420-1
LT3468/LT3468-1
LT3468-2
LT3484-0/LT3484-1
LT3484-2
DESCRIPTION
1.4A/1A, Photoflash Capacitor Charger with
Automatic Top-Off
1.4A, 1A, 0.7A, Photoflash Capacitor Charger
1.4A, 0.7A, 1A Photoflash Capacitor Charger
LT3485-0/LT3485-1 1.4A, 0.7A, 1A, 2A Photoflash Capacitor Charger
LT3485-2/LT3485-3 with Output Voltage Monitor and Integrated IGBT
COMMENTS
Charges 220µF to 320V in 3.7 Seconds from 5V, VIN: 2.2V to 16V,
ISD < 1µA, 10-Lead MS Package
VIN: 2.5V to 16V, Charge Time: 4.6 Seconds for LT3468 (0V to 320V, 100µF,
VIN = 3.6V), ISD < 1µA, ThinSOT Package
VIN: 1.8V to 16V, Charge Time: 4.6 Seconds for LT3484-0
(0V to 320V, 100µF, VIN = 3.6V), ISD < 1µA, 2mm × 3mm 6-Lead
DFN Package
VIN: 1.8V to 10V, Charge Time: 3.7 Seconds for LT3485-0
(0V to 320V, 100µF, VIN = 3.6V), ISD < 1µA, 3mm × 3mm 10-Lead DFN
Driver
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
3750fa
LT 0106 REV A • PRINTED IN THE USA
© LINEAR TECHNOLOGY CORPORATION 2005
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