AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
DUTY Setting
The DUTY resistor selection depends on Duty Cycle , choose the component using the following
equation:
DUTY
1.15
V
DUTY (V ) = 0.3 +
15
R
DUTY (KΩ) =
1.1
VDUTY
(
) −1.073
Example:
Set duty cycle is 50%
0.5
1.15
VDUTY = 0.3 +
= 0.734
15
RDUTY
=
≈ 35.2KΩ
1.1
(
) −1.073
0.734
Output Voltage Setting
R1+ R2
VOUT
=
×VFB
VFB =1.1V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
6
AIMTRON [ AIMTRON TECHNOLOGY ]
