TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
Product performance is limited to specified parameters. Data is subject to change without prior notice.
Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25
CSC3205G-X & -LF Rev. 9 06/10/14
E L E C T R O N I C S I N C .
Photoflash Flyback Transformer
EPC3205G-X & EPC3205G-X-LF
Electrical Parameters @ 25° C
Voltage
(Vdc)
Primary OCL
@ 0Adc
(µH ± 15%)
20.0
12.3
12.3
10.0
10.0
15.0
25.0
24.0
15.0
25.0
4.7
@ 100 KHz,
0.1 Vrms
LT3468
LT3468
LT3468-2
LT3468
LT3468-2
LT3468-1
LT3420
LT3420
LT3420-1
LT3420
LT3750
Chipset
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
V in
320
320
320
320
320
320
320
320
320
320
400
V out
DCR
(Ω Max.)
PCA
Part Number
EPC3205G-1A(-LF)
EPC3205G-2(-LF)
EPC3205G-3(-LF)
EPC3205G-4(-LF)
EPC3205G-5(-LF)
EPC3205G-6(-LF)
EPC3205G-7(-LF)
EPC3205G-8(-LF)
EPC3205G-9(-LF)
EPC3205G-10(-LF)
0.300
0.230
0.230
0.250
0.300
0.300
0.160
0.160
0.160
0.160
0.090
Pri.
25
21
21
25
37
37
18
18
18
18
13
Sec.
• 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
Leakage
Inductance
(µH Typ.)
0.200
0.130
0.130
0.200
0.300
0.300
0.130
0.080
0.100
0.130
0.150
@ 100 KHz,
0.1 Vrms
1.4
1.4
1.0
1.4
1.0
0.7
1.4
1.4
1.0
1.4
3.6
Primary Peak
Current
(A Max.)
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
1:10.4
Pri:Sec
Turns
Ratio
B/1
A/1
A/1
E/2
E/2
E/2
B/1
D/3
C/1
B/4
E/5
Package/
Schematic
Package Drawings Next Page
Notes :
1. Assembly Process (Solder Composition)
2. Peak Solder Rating
(per IPC/JEDEC-J-STD-020C)
4. Weight
5. Packaging Information
(Tube)
EPC3205G-X
SnPb
225°C
TBD grams
TBD pcs / tube
3. Moisture Sensitive Levels (MSL)
(per IPC/JEDEC-J-STD-020C)
1
(Unlimited, ≤30°C/60%RH)
EPC3205G-X-LF
Pb-Free
260°C
TBD grams
TBD pcs / tube
1
(Unlimited, ≤30°C/60%RH)
{
LT3420 320V Photoflash Capacitor Charging Circuit
Flash
Trigger
Transformer
320V
D1
C1
4.7µF
C4
220µF
330V
C2
4.7µF
V
CC
2.5V-10V
Charge
Done
C3
0.1µF
CT GND
V
BAT
1.8V-10V
R
REF
R2
51.1k
V
BAT
R
FB
SW
Flyback
Transformer
T1
10
8
9
4
2 3 6
7
1
5
Photoflash
Capacitor
+
Sec.
Pri.
LT3420
SEC
Bold Lines Indicate
High Current Paths
T2
Sec.
Pri.
Schematic 1
2 3
41
Pri. Sec.
T1
Schematic 2
2 4
61
Pri. Sec.
T1
Schematic 4
3
1
4
2
Pri. Sec.
T1
Schematic 3
3,4 1
85,6
Pri. Sec.
T1
Schematic 5
3
4
6
1
Pri. Sec.
T1