Техническая Спецификация для STMicroelectronics Evaluation board for A5970AD EVALA5970AD EVALA5970AD

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DocID14661 Rev 5

At start-up the device can quickly increase the current up to the current limit in order to 
charge the output capacitor. If soft ramp-up of the output voltage is required, an external 
soft-start network can be implemented as shown in 

. The capacitor C is charged 

up to an external reference through R and the BJT clamps the COMP pin. 

This clamps the duty cycle, limiting the slew rate of the output voltage.

A5970AD