RT8223A 查看數據表（PDF） - Richtek Technology

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RT8223A

High Efficiency, Main Power Supply Controller for Notebook Computers

Richtek Technology 

Function Block Diagram

TONSEL SKIPSEL

BOOT1

UGATE1

PHASE1

LGATE1

PGND

VOUT1

FB1

ENTRIP1

EN

ENC

VREG5

SMPS1

PWM Buck

Controller

Power-On

Sequence

Clear Fault Latch

SW Threshold

SMPS2

PWM Buck

Controller

VREG5

SW Threshold

VREG5

VIN

Thermal

Shutdown

VREG5

REF

VREG3

TONSEL VIN

REF

Function Block Diagram

RT8223A/B

BOOT2

UGATE2

PHASE2

LGATE2

VOUT2

FB2

ENTRIP2

PGOOD

GND

VREG3

VOUT

REF

FB

PGOOD

On-Time

Compute

+

-

+-

Q

TON

R

1-Shot

TRIG

- Comp

+

TOFF

TRIG 1-Shot

Q

1.1 x VREF

0.6 x VREF

0.9 x VREF

Over-Voltage

+

Fault

-

Latch

-

Blanking

+

Time

Under-Voltage

-

+

SS

Time

Current

Limit

+

S

-

-

+

25kHz

+

Detector Zero -

Detector

UGATE

VREG5

LGATE

+

ENTRIP

-

PHASE

DS8223A/B-04 April 2011

SKIPSEL

PWM Controller (One Side)

www.richtek.com

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