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
EPC3205G-X & -LF Rev. 12 11/14/17
E L E C T R O N I C S I N C .
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
• UL 1446 Class B Insulation System
• Isolation : 500 Vrms
Package Drawings Next Page
Schematic 1
2
3
41
Pri. Sec.
T1
Schematic 2
2 4
61
Pri. Sec.
T1
Schematic 3
3,4 1
85,6
Pri. Sec.
T1
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
52
pcs / tube
3
. Moisture Sensitive Levels (MSL)
(per IPC/JEDEC-J-STD-020C)
1
(Unlimited, 30°C/60%RH)
260°C
TBD
52
pcs / tube
1
(Unlimited,30°C/60%RH)
EPC3205G-X-LF
Pb-Free
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
R2
2k
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
• DANGER HIGH
VOLTAGE •
Operation By High Voltage
Trained Personnel Only
Sec.
Pri.
Electrical Parameters @ 25° C
Voltage
(Vdc)
Primary OCL
@ 0Adc
(µH ± 15%)
20.0
12.3
12.3
10.0
10.0
15.0
20.0 (ref.)
24.0
15.0
20.0 (ref.)
4.7
24.0
@ 100 KHz,
0.1 Vrms
LT3468
LT3468
LT3468-2
LT3468
LT3468-2
LT3468-1
LT3420
LT3420
LT3420-1
LT3420
LT3750
LT3420
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
1.8-5.0
V in
320
320
320
320
320
320
320
320
320
320
400
320
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)
EPC3205G-11(-LF)
0.300
0.230
0.230
0.250
0.300
0.300
0.160
0.160
0.160
0.160
0.090
0.160
Pri.
25
21
21
25
37
37
18
18
18
18
13
35
Sec.
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
0.230
@ 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
1.4
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
1:16
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
B/4
Package/
Schematic
{
Schematic 4
3
1
42
Pri. Sec.
T1
Schematic 5
3
4
61
Pri. Sec.
T1
Engineering/Date
Project Engineer/Date
Documentor/Date
Quality Assurance/Date
²’d By
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
EPC3205G-X & -LF Rev. 12 11/14/17
E L E C T R O N I C S I N C .
Photoflash Flyback Transformer
EPC3205G-X & EPC3205G-X-LF
Package A
Pin 1 I.D.
0.138 Max.
(3.50)
Marking :
PCA
EPC3205G-2(-LF)
D.C.
0.140
(3.56)
0.337
(8.55)
0.120
(3.05)
0.383
(9.72)
0.238
(6.04)
Recommended
Layout
0.311
(7.90)
0.311
(7.90)
1
2
3
4
Package E
0.146
(3.70)
0.218
(5.54)
0.218
(5.54)
1
6
3
4
0.073
(1.85)
0.024
(0.60)
Pin 1 I.D.
Side Marking :
3205G-5(-LF)
0.303
(7.70)
0°-8°
0.205
(5.20)
0.006
(0.15)
0.010
(0.25)
Side Marking
D.C.
PCA EPC
Package B
Pin 1 I.D.
0.205 Max.
(5.20)
Marking :
PCA
EPC3205G-6(-LF)
D.C.
0.145
(3.68)
0.392
(9.96)
0.120
(3.05)
0.422
(10.72)
0.277
(7.04)
Recommended
Layout
0.350
(8.90)
0.350
(8.90)
1
2
3
4
Package C
Pin 1 I.D.
0.193 Max.
(4.90)
Marking :
PCA
EPC3205G-8(-LF)
D.C.
0.140
(3.56)
0.337
(8.55)
0.120
(3.05)
0.383
(9.72)
0.238
(6.04)
Recommended
Layout
0.311
(7.90)
0.311
(7.90)
1
2
3
4
0.358
(9.10)
0.067
(1.70)
0.079
(2.00)
0.059
(1.50)
Pad
Layout
Side Marking :
PCA EPC3205G-7(-LF)
D.C.
0.026
(0.65)
0°-8°
0.008
(0.20)
0.220 Max.
(5.59)
0.012
(0.30)
0.453
(11.50)
Package D
0.236
(6.00)
0.360 Max.
(9.14)
Pin 1
I.D.
1
8
4
5
0.079
(2.00)
0.020
(0.50)
0.500
Max.
(12.70)
0.342
(8.70)
0.063
(1.60)
0.047
(1.20)
0.073
(1.85)
Pad
Layout
Engineering/Date
Project Engineer/Date
Documentor/Date
Quality Assurance/Date
²’d By