IR3310(S)

6

WWW.IRF.COM

90%

10 %

Td off

Tf

Vcc-Vout

Vcc-Vin

DV/dt(off)

Figure 3 - Switching time definitions (turn-off)

Figure 4 - Active clamp waveforms

Figure 5 - Current sense precision:

Accurate measurement only when the power Mosfet is fully ON

Ids

Vout

Vin

T clamp

Vds clamp

( see Design tip to evaluate power dissipation )

Vcc

Vcc

Vcc-Vclamp

Iout

12V

0 V

Vcc-Vin

T minpulse

T minpulse

0 V

Wait

Figure 6 - Minimum pulse & WAIT

function

I Load

Ifb

Vin

clamp

40 us (typ.)

Precise measurement