lt3485edd-3-trpbf Linear Technology Corporation, lt3485edd-3-trpbf Datasheet - Page 16

• 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
16
TYPICAL APPLICATIO S
Figure 10. LT3485-2 Photoflash Charger Uses High Efficiency 4mm Tall Transformer
Figure 11. LT3485-3 Photoflash Charger Uses High Efficiency 3mm Tall Transformer
2.5V TO 8V
2.5V TO 8V
V
V
IN
U
IN
1.8V TO 8V
1.8V TO 8V
C1: 4.7µF, X5R OR X7R, 10V
C2: 0.22µF, X5R or X7R, 10V
T1: KIJIMA MUSEN PART# SBL-5.6-1, L
D1: DIODES INC MMBD3004S DUAL DIODE CONNECTED IN SERIES
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
CHARGE
CHARGE
C1: 4.7µF, X5R OR X7R, 10V
C2: 0.22µF, X5R or X7R, 10V
T1: TDK LDT565630T-041, L
D1: DIODES INC MMBD3004S DUAL DIODE CONNECTED IN SERIES
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
DONE
DONE
V BAT
V BAT
C2
0.22µF
C2
0.22µF
R1
100k
R1
100k
C1
4.7µF
C1
4.7µF
DONE
CHARGE
V
IGBTIN
DONE
IGBTIN
CHARGE
V
V
IN
V
IN
BAT
BAT
PRI
LT3485-2
LT3485-3
= 4.7µH, N = 10.4
IGBTOUT
IGBTOUT
VMONT
V
MONT
SW
PRI
SW
GND
GND
= 10µH, N = 10.2
1:10.2
3485 F10
3485 F11
1:10.2
T1
T1
TO MICRO
TO GATE OF IGBT
TO MICRO
TO GATE OF IGBT
D1
D1
C
PHOTOFLASH
CAPACITOR
C
PHOTOFLASH
CAPACITOR
320V
OUT
320V
OUT
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