Photoflash Flyback Transformer
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
E L E C T R O N I C S I N C .
• UL 1446 Class B Insulation System
• Isolation : 500 Vrms
Electrical Parameters @ 25°C
Primary OCL
@ 0Adc
(µH ± 15%)
Leakage
Inductance
(µH Typ.)
Primary Peak
Current
DCR
( Ω Max.)
PCA
Part Number
Voltage
(Vdc)
Turns
Ratio
Package/
Schematic
Chipset
(A Max.)
@ 100 KHz,
0.1 Vrms
20.0
@ 100 KHz,
0.1 Vrms
0.200
Pri.
Sec.
V in
V out
Pri:Sec
0.300
0.230
0.230
0.250
0.300
0.300
0.160
0.160
0.160
0.160
0.090
0.160
25
21
21
25
37
37
18
18
18
18
13
35
EPC3205G-1A(-LF)
EPC3205G-2(-LF)
LT3468
LT3468
LT3468-2
LT3468
LT3468-2
LT3468-1
LT3420
LT3420
LT3420-1
LT3420
LT3750
LT3420
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
1.8-5.0
5.0-7.0
1.8-5.0
320
320
320
320
320
320
320
320
320
320
400
320
1.4
1.4
1.0
1.4
1.0
0.7
1.4
1.4
1.0
1.4
3.6
1.4
1:10.2
1:10.2
1:10.2
1:10.2
1:10.2
1:10.2
1:12
1:12
1:10.2
1:12
B/1
A/1
A/1
E/2
E/2
E/2
B/1
D/3
C/1
B/4
E/5
B/4
12.3
12.3
10.0
10.0
15.0
20.0 (ref.)
24.0
15.0
20.0 (ref.)
4.7
0.130
0.130
0.200
0.300
0.300
0.130
0.080
0.100
{
EPC3205G-3(-LF)
EPC3205G-4(-LF)
EPC3205G-5(-LF)
EPC3205G-6(-LF)
EPC3205G-7(-LF)
EPC3205G-8(-LF)
EPC3205G-9(-LF)
EPC3205G-10(-LF)
EPC3205G-11(-LF)
0.130
0.150
0.230
1:10:4
1:16
24.0
LT3420 320V Photoflash Capacitor Charging Circuit
Schematic 1
Schematic 2
Flyback
T1
T1
V
BAT
1.8V-10V
1
4
3
Transformer
T1
320V
1
6
4
Pri.
Sec.
Pri.
Sec.
D1
Sec.
2
C1
4.7µF
2
Pri.
Trigger
Transformer
T2
R2
Schematic 3
Schematic 4
Pri.
Sec.
51.1k
T1
T1
2
3
4
2
3
6
C4
220µF
330V
5,6
3,4
8
+
V
4
Pri.
Sec.
CC
2.5V-10V
C2
4.7µF
Pri.
Sec.
V
R
SW
BAT FB
1
7
1
1
SEC
Photoflash
Capacitor
LT3420
Schematic 5
9
8
Flash
R
REF
Charge
Done
T1
1
3
6
CT
10
GND
Pri.
Sec.
5
4
C3
0.1µF
Bold Lines
Indicate
High Current
Paths
EPC3205G-X
Notes :
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)
Package Drawings Next Page
4. Weight
TBD
TBD
5. Packaging Information
52 pcs / tube
52 pcs / tube
(Tube)
Documentor/Date
²’d By
Project Engineer/Date
Engineering/Date
Quality Assurance/Date
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.
EPC3205G-X & -LF Rev. 12 11/14/17
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
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