RT8859M 데이터 시트보기 (PDF) - Richtek Technology

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RT8859M

Multi-Phase PWM Controller for CPU Core Power Supply

Richtek Technology 

RT8859M

Function Block Diagram

IMON

RGNDA

FBA

COMPA

Current

Monitor

Current

Offset

Monitor Generator

MUX

VSET

VSETA

From Control Logic

ADC

DAC

Soft-Start & Slew

Rate Control

SVID XCVR

VSETA

+

-

ERROR

AMP

Offset

Cancellation

UVLO

Control &

Protection Logic

PWM

+ CMP

-

TON

Gen

DVIDA

DVID

OFS

RGND

FB

COMP

IBIAS

ISEN4P

ISEN4N

ISEN3P

ISEN3N

ISEN2P

ISEN2N

ISEN1P

ISEN1N

Set VIDA

Fast & Slow

1/20

Set VID

Fast & Slow

1/20

From Control Logic

Offset

Generator

DAC

Soft-Start & Slew

Rate Control

VSET

+

-

+

10

-

+

10

-

+

10

-

+

10

-

To Protection Logic

OVP/UVP/NVP OCP

+

20

-

Offset

Cancellation

PWM

CMP

+

-

QR

+

+ CMP

-

VQR_TRIP

PHASE

Selector

TON

Gen

SUM

To Protection Logic

OVP/UVP/NVP

OCP

Current Balance

OCSET

GND

QRSET

QRSETA

PWMA

TONSETA

ISENAP

ISENAN

OCSETA

TONSET

PWM1

PWM2

PWM3

PWM4

RSET

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is a registered trademark of Richtek Technology Corporation.

DS8859M-05 July 2012

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