Photoflash Flyback Transformer
E L E C T R O N I C S I N C .
EPC3205G-X & EPC3205G-X-LF
• Used as Flyback Transformer in High Voltage Photoflash Capacitor Charger
• Designed for use with Linear Technology Chip
• Add “-LF” after part number for Lead Free
• Operating Temperature : -40°C to +85°C
• UL 94V-0 Recognized Components
• UL 1446 Class B Insulation System
• Isolation : 500 Vrms
Electrical Parameters @ 25° C
Voltage
Chipset
Primary OCL
@ 0Adc
(µH ± 15%)
DCR
(WMax.)
Primary Peak
Current
Turns
Ratio
Package/
Schematic
PCA
Part
Number
Leakage
Inductance
(µH Typ.)
(Vdc)
(A Max.)
@ 100 KHz,
0.1 Vrms
Pri.
Sec.
V in
V out
Pri:Sec
@ 100 KHz,
0.1 Vrms
25
21
21
25
33
33
18
18
18
LT3468-1
LT3468
0.7
1.4
1.0
1.4
1.0
0.7
1.4
1.4
1.0
.300
.230
.230
.250
.300
.300
.160
.160
.230
A/1
B/1
B/1
F/2
F/2
F/2
C/1
E/3
D/1
EPC3205G-1(-LF)
EPC3205G-2(-LF)
2.5-5.0
2.5-5.0
2.5-5.0
2.5-4.0
2.5-5.0
2.5-5.0
1.8-5.0
1.8-6.0
1.8-5.0
320
320
320
320
320
320
320
320
320
1:10.2
1:10.2
1:10.2
1:10.2
1:10.2
1:10.2
1:12
20.0
12.3
12.3
10.0
10.0
15.0
25.0
24.0
15.0
.200
.130
.130
.200
.300
.300
.130
.080
.100
LT3468-2
LT3468
EPC3205G-3(-LF)
EPC3205G-4(-LF)
EPC3205G-5(-LF)
EPC3205G-6(-LF)
EPC3205G-7(-LF)
EPC3205G-8(-LF)
LT3468-2
LT3468-1
LT3420
LT3420
LT3420-1
1:12
1:10.2
Schematic 1
LT3420 320V Photoflash Capacitor Charging Circuit
T1
T1
1
2
4
3
1:12
V
BAT
1.8V-10V
C1
4.7µF
320V
Pri.
Pri.
Sec.
Sec.
D1
5.6
3.4
8
1
Flying
Lead
T2
Schematic 2
T1
1
2
6
4
2
3
6
C4
+
4
V
R
SW
V
BAT FB
CC
2.5V-10V
C2
4.7µF
220µF
330V
7
1
SEC
LT3420
Photoflash
Capacitor
Schematic 3
T1
5,6
3,4
8
9
8
Flash
Pri.
Sec.
Charge
Done
R
REF
1
CT
10
GND
5
C3
0.1µF
Bold Lines Indicate
High Current Paths
Notes :
EPC3205G-X
EPC3205G-X-LF
1. Assembly Process (Solder Composition)
SnPb
Pb-Free
2. Peak Solder Rating
225°C
1
260°C
1
(per IPC/JEDEC-J-STD-020C)
3. Moisture Sensitive Levels (MSL)
(per IPC/JEDEC-J-STD-020C)
(Unlimited, £30°C/60%RH) (Unlimited, £30°C/60%RH)
4. Weight
TBD grams
TBD grams
5. Packaging Information
Package Drawings Next Page
(Tube)
TBD pcs / tube
TBD pcs / tube
Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25
Product performance is limited to specified parameters. Data is subject to change without prior notice.
CSC3205G-X & -LFa Rev. 4 10/12/05 FT
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com