IR1176S View Datasheet(PDF) - International Rectifier

Part Name

Description

Manufacturer

IR1176S

SYNCHRONOUS RECTIFIER DRIVER

International Rectifier 

IR1176

3 -PLL Naturalfrequency:

ωn =2πfn(KHz)= √ Ichpump(uA) x Kvco_ac(KHz/V) / C(nF)

Choose Cfsuchthat Cf=C/16

4 -PLL Damping factorcalculations:

P = πE-3 x Rf (KOhms) x C(nF) x fn(KHz)

Typical value for P is 0.707. (Critically damped)

5 -Advancetim ing:

Tadv(nsec) = RADV (KOhms)*10 -+160

W hereRADV isresistancefrom RADV1 orRADV2 toground.

Example C:RADV=10Kohms willresultin Tadv=10*10-+160==19006nsnescec..

6-Dead time calculations:

TTdd((nnsseecc)=)0=.069.6*R9d*Ct(KdOt(hpmFs)*)*(CRddtt(p(KF)Ω+)+50.1(F5o)r(FVdodr=V5dVd)=5V)

W hereRdtisresistancebetweenpinsDTIN1andDTOUT1orDTIN2and

DTOUT2.Cdtiscapacitancefrom DTIN1 or DTIN2 toground.

Example D: Rd=2KW and Cdt=100pF will result in Td=148.35nsec.

Fig. 4 PLL loop filter component definitions

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