RT9451 datasheet(35/37 Pages) RICHTEK

No. de pieza	RT9451

Descripción Electrónicos	Switch-Mode Single Cell Li-ion Battery Charger with USB OTG

PDF	37 Pages

Scroll/Zoom	100%

Fabricante Electrónico	RICHTEK [Richtek Technology Corporation]

Página de inicio	http://www.richtek.com

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35 / 37 page

RT9451

DS9451-00

September 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Figure 9. Operation Flow Chart

Any State

OTG_EN = 1?

OTG Pin from High to Low

@ OTG_PL = 0? or

OTG Pin from Low to High

@ OTG_PL = 1?

OTG Mode

OTG Pin=High @ OTG_PL = 0? or

OTG Pin=Low @ OTG_PL = 1?

VIN > VPOR_IN?

Power On

Load I

C with Default

Settings

VBATS > VSHORT?

Charge with ISHORT

Fast-Charge with Low-

CHRG

ICHRG < IEOC?

Termination is

Enabled?

Keep in CV Mode

Charge Done

------------------------

INT of Charge

Termination

Re-Charge is

Enabled?

VBATS < VRECH?

INT of Re-Charge

32 Min Timer

Expired?

32 Min Timer

Expired?

INT of TFault

Fault in Buck Mode

(1) OVP

(2) CHRVPI

(3) TFault

(4) CVOVP

OTG Mode

CH_EN[1:0] = [0,1]?

Fault?

---------------------------------

VINOVP, VOCP, VBATUVP,

VBATOVP, T32s Fault

Set to Hi-Z Mode

--------------------------

CH_EN[1:0] = [0,0]

Yes

RT9451 Datasheet(PDF) 35 Page - Richtek Technology Corporation

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