IR3621MPBF datasheet(19/29 Pages) IRF

Part #	IR3621MPBF

Description	2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP

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Manufacturer	IRF [International Rectifier]

Direct Link	http://www.irf.com

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19 / 29 page

IR3621&(PbF)

19

www.irf.com

TYPICAL APPLICATION

Figure 20 - 2-phase operation with inductor current sensing using type 2 compensation.

12V to 1.8V @ 30A output

12V

PGood

Q5

L4

Q4

C5

U1

1.8V @ 30A

R8

C16

L3

C17

R9

R7

C10

R4

C9

R3

C8

C3

C4

C13

C11

PGnd1

VCL

VOUT3

LDrv1

HDrv1

Fb1

VP2

Fb2

LDrv2

HDrv2

VcH1

VcH2

Vcc

Gnd

Comp2

Comp1

SS1 / SD

PGood

VREF

IR3621

Q3

Q2

C14

Sync

Rt

Hiccup

SS2 / SD

PGnd2

OCSet2

OCSet1

VSEN1

VSEN2

R2

R1

R6

D1

C12

C18

R5

C15

R8

R7

VSEN1

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IR3621MPBF Datasheet(PDF) 19 Page - International Rectifier

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