AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Soft-Start Setting
The soft start operation is determined by the capacitor connected to the SS terminal. It can calculate the
soft start time Ts(s).
VDUTY − 0.3
∆t
∆V
∆t
C ×
= I → C ×
=1µA
Ts(s) = (VDUTY − 0.3) × C(µF)
Example: (Fig C)
R5=47K
Æ
V
DUTY=0.790V
Æ
Ts(s)=(0.790-0.3)*1=0.49(sec)
CH1:VOUT CH2:SS CH3:DUTY CH4:IBAT
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
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AIMTRON [ AIMTRON TECHNOLOGY ]
