ISL6443 Ver la hoja de datos (PDF) - Renesas Electronics

Número de pieza

componentes Descripción

Fabricante

ISL6443

300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

Renesas Electronics 

Block Diagram

BOOT1

UGATE1

PHASE1

VCC_5V

LGATE1

PGND

ADAPTIVE DEAD-TIME

DIODE EMULATION

V/I SAMPLE TIMING

PGOOD SD1

GATE3

FB3

gm*VE

0.8V REFERENCE

+

VE

+

-

UV

PGOOD

VIN SGND

SD2

VCC

POR

ENABLE

BIAS SUPPLIES

REFERENCE

FAULT LATCH

SOFT-START

UV

PGOOD

1400k

18.5pF

FB1

180k

-

16k

+ 0.8V

REF

+

ERROR AMP 1

SS1

ISEN1

CURRENT

SAMPLE

OCSET1

-

+

CURRENT

SAMPLE

+ 0.8V REFERENCE

-

PWM1

+

OC1

OC2

PWM2

-

+

DUTY CYCLE RAMP GENERATOR

PWM CHANNEL PHASE CONTROL

-

OC1

OC2

-

+

+

VIN SYNC VCC

SAME STATE FOR

2 CLOCK CYCLES

REQUIRED TO LATCH

OVERCURRENT FAULT

SAME STATE FOR

2 CLOCK CYCLES

REQUIRED TO LATCH

OVERCURRENT FAULT

ADAPTIVE DEAD-TIME

DIODE EMULATION

V/I SAMPLE TIMING

PGND

BOOT2

UGATE2

PHASE2

VCC

LGATE2

18.5pF

16k

ERROR AMP 2

1400k

-

+

180k

VSEN2

SOFT2

-

CURRENT

+

SAMPLE

0.8V REFERENCE +

+ 0.8V

REF

ISEN2

CURRENT

SAMPLE

OCSET2

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