lt3485edd-3-trpbf Linear Technology Corporation, lt3485edd-3-trpbf Datasheet - Page 17

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

TYPICAL APPLICATIO S
Figure 13. Charge Time with TDK Transformers (Figures 11, 12, 13, 14 and 15)
Figure 12. LT3485-0 Photoflash Circuit Uses Tiny 3mm Tall Transformer
2.5V TO 8V
V
U
IN
1.8V TO 8V
CHARGE
C1: 4.7µF, X5R OR X7R, 10V
C2: 0.22µF, X5R or X7R, 10V
T1: TDK LDT565630T-001, L
D1: DIODES INC MMBD3004S DUAL DIODE CONNECTED IN SERIES
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
DONE
V BAT
C2
0.22µF
6
5
4
3
2
1
0
2
LT3485-0
3
C1
4.7µF
LT3485-1
DONE
CHARGE
IGBTIN
V
V
4
IN
BAT
PRI
LT3485-0
LT3485-2
LT3485-3
V
= 6µH, N = 10.4
IN
5
IGBTOUT
(V)
V
MONT
SW
GND
6
C
OUT
1:10.2
3485 F12
T1
TO MICRO
TO GATE OF IGBT
7
= 50µF
3485 F13
8
D1
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
C
PHOTOFLASH
CAPACITOR
320V
OUT
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