LT3468 Linear Technology, LT3468 Datasheet - Page 12

• Manufacturer Part Number: LT3468
• Description: Photoflash Capacitor Charger in ThinSOT
• Manufacturer: Linear Technology

LT3468/LT3468-1
TYPICAL APPLICATIO S
RELATED PARTS
12
PART NUMBER
LTC3407
LT3420/LT3420-1
LTC3425
LTC3440/LTC3441
2.5V TO 8V
C1: 4.7 F, X5R OR X7R, 10V
T1: TDK PART# LDT565630T-001, L
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ZETEX ZHCS400 OR EQUIVALENT
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
2.5V TO 8V
C1: 4.7 F, X5R OR X7R, 10V
T1: TDK PART# LDT565630T-002, L
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ZETEX ZHCS400 OR EQUIVALENT
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
CHARGE
DONE
CHARGE
V IN
DONE
V IN
100k
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
R1
100k
R1
C1
4.7 F
3
4
C1
4.7 F
3
4
DONE
CHARGE
DESCRIPTION
Dual 600mA (I
Converter
1.4A/1A, Photoflash Capacitor Chargers with
Automatic Top-Off
5A I
Converter
600mA/1A (I
V
DONE
CHARGE
IN
5
V
LT3468
IN
SW
5
LT3468-1
, 8MHz, Multi-Phase Synchronous Step-Up DC/DC
PRI
PRI
= 6 H, N = 10.4
SW
GND
5, 6
7, 8
= 14.5 H, N = 10.2
1
OUT
SW
GND
OUT
1
2
), Synchronous Buck-Boost DC/DC Converter 95% Efficiency, V
1:10.4
5
8
LT3468-1 Photoflash Circuit uses Tiny 3mm Tall Transformer
T1
), 1.5MHz, Synchronous Step-Down DC/DC 96% Efficiency, V
LT3468 Photoflash Circuit uses Tiny 3mm Tall Transformer
2
1:10.2
U
T1
D2
4
1
D2
4
1
www.linear.com
D1
D1
+
+
C OUT
PHOTOFLASH
CAPACITOR
320V
C OUT
PHOTOFLASH
CAPACITOR
320V
3468 TA03
3468 TA04
COMMENTS
Charges 220 F to 320V in 3.7 seconds from 5V,
V
95% Efficiency, V
I
I
I
SD
Q
SD
IN
: 25 A, I
: <1 A, QFN-32
: 2.2V to 16V, I
: <1 A, MS10E
10
9
8
7
6
5
4
3
2
1
0
10
SD
2
Charge Time
9
8
7
6
5
4
3
2
1
0
: <1 A, MS-10, DFN-12
Charge Time
2
C
OUT
C
3
OUT
IN
IN
IN
Q
= 50 F
3
: 2.5V to 5.5V, V
: 0.5V to 4.5V, V
: 2.5V to 5.5V, V
: 90 A, I
= 20 F
4
C
4
OUT
5
V
SD
= 100 F
IN
LINEAR TECHNOLOGY CORPORATION 2003
5
V
: <1 A, MS10
(V)
C
IN
OUT
6
(V)
6
OUT(MIN)
OUT(MIN)
OUT(MIN)
= 50 F
LT/TP 1003 1K • PRINTED IN USA
7
7
: 0.6V, I
: 5.25V, I
: 2.5V to 5.5V,
8
3468 TA05
8
3468 TA06
9
Q
9
: 40 A,
Q
: 12 A,
34681i