PRELIMINARY

CM9112

Flow Chart

ISET1

VOUT

R

500

2

I

4.75V<VAD<6.5V

Set Precharge Mode

STAT1

=STAT2=ON

Start Timeout 1

Tj > 150

Iin > 1.5A

Shut down LDO, VREF,

Stop charging and Latch ;

Set STAT1=STAT2=OFF

Connect VSYS with Battery

through external Q 2

ENA

=High

Yes

BSEN

>3.3V

Yes

Charge time >

Timeout 1

Stop Charging

Set

STAT1

=STAT2=OFF

Yes

Precharge

Mode

No

No

Set CC mode

STAT1

=ON,

STAT2

=OFF

CC Mode

BSEN

>= 4.200V

No

Set CV Mode

Reset

Timeout 2

CV Mode

No

Yes

BSEN

< 4.200V-100mV

OTP

OCP

Yes

Standby

Mode

No

Timer

Fault

Battery hot ,

cold

or removed

Charge time >

Timeout 2

Stop charging

and Latch. Set

STAT1

=STAT2=OFF

Charge Done or

Battery is not

present

VIN

< BSEN

Shut down LDO1 ,

VREF,

Stop Charging

Connect VSYS with

Battery through

external Q2

Yes

Sleep mode

Shutdown mode

USB

>4.5V

No

No

Yes

Yes

Yes

Yes

No

No

Battery

Temperature

Checking

No

Precharge in progress

Fast charge in progress

Charge done

STAT2

STAT1

ON

ON

OFF

ON

OFF

ON

Timer fault

Sleep mode

OFF

OFF

OFF

OFF

CHARGE STATE

AD

OK=0

AD

OK=1

AD

OK=1

Yes

AD

OK=1

Start Timeout 1;

VSYS

=4.2V/500 mA

ISET2

VOUT

R

500

2

I

AD

OK=1

ISET2

VOUT

R

500

2

I

Start Timeout 2

Yes

ISET1

VOUT <=

R

120

I

No

No

Yes

ISET2

VOUT<=

R

120

I

ISET1

VOUT

R

500

2

I

No

Yes

AD

OK=1

Yes

Stop charging

Stop Timeout 2;

Set STAT1=OFF

STAT2

=ON

No

Stop charging

Set STAT1=OFF,

STAT2

=OFF

ENA

has no effects

of VSYS output

2.5V<THERM

<4.375V

Note: If Therm is used, during any charging mode, removing a battery will cause the CV mode, then termination, the equivalent

to charge done. Until the battery is returned, the charger will cycle between standby mode and re-charge cycle.

© 2006 California Micro Devices Corp. All rights reserved.

07/06/06

490 N. McCarthy Blvd., Milpitas, CA 95035-5112

l

Tel: 408.263.3214

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Fax: 408.263.7846

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www.cmd.com

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