RT8205A 데이터 시트보기 (PDF) - Richtek Technology

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RT8205A

High Efficiency, Main Power Supply Controllers for Notebook Computers

Richtek Technology 

RT8205A/B/C

Function Block Diagram

TONSEL SKIPSEL

BOOT1

UGATE1

PHASE1

LGATE1

PGND

VOUT1

FB1

ENTRIP1

EN

VREG5

SMPS1

PWM Buck

Controller

Power-On

Sequence

Clear Fault Latch

SW Threshold

VREG5

VIN

Thermal

Shutdown

VREG5

SMPS2

PWM Buck

Controller

VREG5

SW Threshold

BOOT2

UGATE2

PHASE2

LGATE2

VOUT2

FB2

ENTRIP2

PGOOD

GND

REF

VREG3

VREG3

REF

Function Block Diagram

TONSEL VIN

VOUT

REF

FB

PGOOD

On-Time

Compute

+

-

+-

Q

TON

R

1-Shot

TRIG

- Comp

+

TOFF

TRIG 1-Shot

Q

1.1 x VREF

0.7 x VREF

0.9 x VREF

Over-Voltage

+

Fault

-

Latch

-

Blanking

+

Time

Under-Voltage

-

+

SS

Time

Current

+ Limit

-

-

+

25kHz

+

Detector Zero -

Detector

UGATE

VREG5

LGATE

+

ENTRIP

-

PHASE

SKIPSEL

PWM Controller (One Side)

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

www.richtek.com

6

is a registered trademark of Richtek Technology Corporation.

DS8205A/B/C-06 July 2012

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