AT1386
Preliminary Product Information
6-Channel DC-DC Converter for DSC
＊Soft start setting (CH1~6)
Consider the input voltage and load current to design the capacitor connected to
the SS pin.
It can calculate the CH1~6 soft start time Ts(s)(valid threshold 0.3~0.8V interval).
∆V
∆t
C ×
= I
Ts(s) = 0.5× C(µF)
Note : It could be disabled soft start function by floating SS pin.
Determine the triangular Oscillator Frequency
The triangular oscillator frequency is determined by the timing capacitor (CT). It is
difficult to incorporate these non-linear characteristics into the equation. This
difference is caused by characteristics, such as changes in the maximum voltage
amplitude of the sawtooth waveform with the CT value and the circuit delay causing
the maximum amplitude to become large in the case of a high oscillating frequency
even for the same capacitor. In practical use, therefore, the user should read the CT
values from the characteristic curve or should determine an approximate target value
by using the equation.
41000
CT (pF)
f
OSC (KHz) =
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 ]
