lt3485edd-3-trpbf Linear Technology Corporation, lt3485edd-3-trpbf Datasheet - Page 18

• Manufacturer Part Number: lt3485edd-3-trpbf
• Description: Photoflash Capacitor Chargers With Output Voltage Monitor And Integrated Igbt Drive
• Manufacturer: Linear Technology Corporation

LT3485-0/LT3485-1/
LT3485-2/LT3485-3
TYPICAL APPLICATIO S
18
Figure 14. LT3485-1 Photoflash Circuit Uses Tiny 3mm Tall Transformer
Figure 15. LT3485-2 Photoflash Circuit Uses Tiny 3mm Tall Transformer
2.5V TO 8V
2.5V TO 8V
V
V
U
IN
IN
1.8V TO 8V
1.8V TO 8V
C1: 4.7µF, X5R OR X7R, 10V
C2: 0.22µF, X5R or X7R, 10V
T1: TDK LDT565630T-002, L
D1: DIODES INC MMBD3004S DUAL DIODE CONNECTED IN SERIES
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
C1: 4.7µF, X5R OR X7R, 10V
C2: 0.22µF, X5R or X7R, 10V
T1: TDK LDT565630T-003, L
D1: DIODES INC MMBD3004S DUAL DIODE CONNECTED IN SERIES
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
CHARGE
CHARGE
DONE
DONE
V BAT
V BAT
C2
0.22µF
C2
0.22µF
C1
4.7µF
C1
4.7µF
DONE
CHARGE
DONE
CHARGE
IGBTIN
IGBTIN
V
V
V
V
IN
IN
BAT
BAT
PRI
PRI
LT3485-1
LT3485-2
= 14.5µH, N = 10.2
= 10µH, N = 10.2
IGBTOUT
IGBTOUT
VMONT
VMONT
SW
SW
GND
GND
1:10.2
1:10.2
3485 F14
3485 F15
T1
T1
TO MICRO
TO MICRO
TO GATE OF IGBT
TO GATE OF IGBT
D1
D1
C
PHOTOFLASH
CAPACITOR
C
PHOTOFLASH
CAPACITOR
320V
OUT
320V
OUT
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