LT3420EMS#PBF Linear Technology, LT3420EMS#PBF Datasheet - Page 17

• Manufacturer Part Number: LT3420EMS#PBF
• Description: IC PHOTOFLASH CAP CHARGER 10MSOP
• Manufacturer: Linear Technology

Specifications of LT3420EMS#PBF

• Applications: Photoflash Capacitor Charger
• Current - Supply: 90µA
• Voltage - Supply: 2.2 V ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL APPLICATIO S
2.5V TO 10V
DANGER HIGH VOLTAGE
OPERATION BY HIGH VOLTAGE
TRAINED PERSONEL ONLY
C1: 4.7µF, X5R or X7R, 6.3V
C2: 4.7µF, X5R or X7R, 10V
C4: RUBYCON 220µF PHOTOFLASH CAPACITOR
D1: VISHAY GSD2004S SOT-23
T1: KIJIMA MUSEN SBL-6.4
* MAXIMUM AMBIENT TEMPERATURE OF 60°C DICTATED BY TRANSFORMER
LT3420 Photoflash Charging Circuit Uses Small Transformer
1.8V TO 5V
U
CHARGE
DUAL DIODE. DIODES CONNECTED IN SERIES
DONE
V
V
BAT
CC
90
80
70
60
50
40
50
V
C2
4.7µF
CC
C1
4.7µF
= V
100
9
8
4
BAT
V
V
CHARGE
DONE
C
BAT
CC
= V
T
150
10
2
Efficiency
IN
V
C3
0.1µF
LT3420
IN
R
V
FB
= 3.3V
OUT
3
R1
47.5k
200
(V)
2
1
R
GND
SEC
SW
REF
250
1:12
V
T1*
6
5
IN
= 5V
1
7
5
3
300
PHOTOFLASH
R2
2k
CAPACITOR
3420 TA03
D1
350
220µF
330V
C4
+
3420 TA02
300V
LT3420/LT3420-1
17
3420fb