FP7208

This datasheet contains new product information.

Feeling Technology reserves the rights to modify the product specification without notice.

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Rev. 0.64

10/13

Input Current Limit Setting

The SS voltage is adjusted using a resistive voltage divider connected from input voltage to D3

cathode, D3 Anode connects to SS pin. The input occur inrush current to cause input voltage drop off

then SS voltage also drop less than 1.5V, PWM duty of EXT pin can be limited, which reduces inrush

current to protect switching MOSFET. The level of internal oscillator is from 0.5V to 1.5V. D3 is

unconnected the SS voltage is 3.6V. The circuit and detailed figure are shown as below.

D3

1N4148

SS

R9

R8

OSC

0.5V

OSC

1.5V

SS

3.6V

SS

SS Voltage Drop

EXT Duty Limit

Voltage

Time

Time

Voltage

EXT