Photoflash Flyback Transformer
ELECTRONICS INC.
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
PCA
Part
Number
Chipset
Voltage
(Vdc)
V in
EPC3205G-1(-LF)
EPC3205G-2(-LF)
EPC3205G-3(-LF)
EPC3205G-4(-LF)
EPC3205G-5(-LF)
EPC3205G-6(-LF)
EPC3205G-7(-LF)
EPC3205G-8(-LF)
LT3468-1
LT3468
LT3468-2
LT3468
LT3468-2
LT3468-1
LT3420
LT3420
LT3420-1
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
V out
320
320
320
320
320
320
320
320
320
0.7
1.4
1.0
1.4
1.0
0.7
1.4
1.4
1.0
Primary Peak
Current
(A Max.)
Turns
Ratio
Pri:Sec
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
Primary OCL
@ 0Adc
(µH ± 15%)
@ 100 KHz,
0.1 Vrms
20.0
12.3
12.3
10.0
10.0
15.0
25.0
24.0
15.0
Leakage
Inductance
(µH Typ.)
@ 100 KHz,
0.1 Vrms
.200
.130
.130
.200
.300
.300
.130
.080
.100
DCR
(Ω Max.)
Pri.
.300
.230
.230
.250
.300
.300
.160
.160
.230
Sec.
25
21
21
25
33
33
18
18
18
A/1
B/1
B/1
F/2
F/2
F/2
C/1
E/3
D/1
Package/
Schematic
Schematic 1
1
Pri.
2
3
T1
LT3420 320V Photoflash Capacitor Charging Circuit
4
Sec.
VBAT
1.8V-10V
C1
4.7µF
T1
1:12
5.6
8
D1
320V
3.4
1
Schematic 2
1
Pri.
2
4
VCC
2.5V-10V
C2
4.7µF
T1
Flying
Lead
T2
6
Sec.
2
3
6
4 VBAT RFB SW
SEC
LT3420
7
C4 +
220µF
330V
Photoflash
Capacitor
Schematic 3
5,6
Pri.
3,4
1
T1
8
Sec.
Charge
Done
9
8
CT
10
C3
0.1µF
RREF
GND
5
1
Flash
Notes :
1. Assembly Process
(Solder Composition)
2. Peak Solder Rating
(per IPC/JEDEC-J-STD-020C)
EPC3205G-X
SnPb
225°C
1
(Unlimited,
≤30°C/60%RH)
TBD grams
(Tube)
TBD pcs / tube
EPC3205G-X-LF
Pb-Free
260°C
1
(Unlimited,
≤30°C/60%RH)
TBD grams
TBD pcs / tube
Bold Lines Indicate
High Current Paths
3. Moisture Sensitive Levels (MSL)
(per IPC/JEDEC-J-STD-020C)
4. Weight
5. Packaging Information
Package Drawings Next Page
Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25
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.
CSC3205G-X & -LFa
Rev. 4 10/12/05 FT
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
PCA [ PCA ELECTRONICS INC. ]
