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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 : -40C to +85C * 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 (H 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 (H Typ.) @ 100 KHz, 0.1 Vrms .200 .130 .130 .200 .300 .300 .130 .080 .100 DCR ( 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 4.7F T1 1:12 5.6 8 D1 320V
3.4
1
Schematic 2
1 Pri. 2 4
VCC 2.5V-10V C2 4.7F T1
Flying Lead T2
6 Sec.
2 3 6 4 VBAT RFB SW SEC LT3420 7 C4 + 220F 330V Photoflash Capacitor
Schematic 3
5,6 Pri. 3,4 1
T1
8 Sec.
Charge Done
9 8 CT 10 C3 0.1F
RREF GND 5
1
Flash
Notes : 1. Assembly Process (Solder Composition) 2. Peak Solder Rating
(per IPC/JEDEC-J-STD-020C)
EPC3205G-X SnPb 225C 1 (Unlimited, 30C/60%RH) TBD grams (Tube) TBD pcs / tube
EPC3205G-X-LF Pb-Free 260C 1 (Unlimited, 30C/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
Photoflash Flyback Transformer
ELECTRONICS INC. Package A
.350 (8.90)
1 4
EPC3205G-X & EPC3205G-X-LF
Package B
.311 (7.90)
1 4
Recommended Layout .350 (8.90)
3
Recommended Layout .311 (7.90)
3
Pin 1 I.D. Marking : PCA 2 EPC3205G-1(-LF) D.C. .098 Max. (2.50)
.422 (10.72) .277 (7.04)
Pin 1 I.D. Marking : PCA 2 EPC3205G-2(-LF) D.C.
.3.83 (9.72) .238 (6.04)
.138 Max. (3.50)
Package C
.350 (8.90)
1
Package D
.311 (7.90)
1
Recommended Layout
4
Recommended Layout
4
Pin 1 I.D. Marking : PCA 2 EPC3205G-6(-LF) D.C.
.350 (8.90)
3
.422 (10.72) .277 (7.04)
Pin 1 I.D. Marking : PCA 2 EPC3205G-8(-LF) D.C.
.311 (7.90)
3
.383 (9.72) .238 (6.04)
.205 Max. (5.20)
.193 Max. (4.90)
Package E
Pin 1 I.D.
1
Package F
.024 .209 (5.30) 6 (.600) .209 (5.30)
3 4
.319 Typ. (8.10)
8
1
.236 (6.00)
4
.401 Typ. (10.20) .490 .020 (10.90) 5 (.500)
.146 (3.70) .073 (1.85)
Pin 1 I.D.
.079 (2.00) Side Marking : .012 PCA EPC3205G-7(-LF) (.300) D.C. 0-8 .193 (4.90)
Side Marking : PCA EPC3205G-X(-LF) D.C. .010 .187 0-8 (.250) (4.75) .303 (7.70) .342 (8.70) Pad Layout .006 (.150)
.026 (.650) .453 (11.50) Pad Layout .079 (2.00) .067 (1.70) .358 (9.10)
.008 (.203) .047 (1.20)
.059 (1.50)
.063 (1.60)
.073 (1.85)
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 & -LFb Rev. 4 10/12/05 FT
TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com

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