RT9519A Просмотр технического описания (PDF) - Richtek Technology

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RT9519A

Linear Single Cell Li-lon Battery Charger with Auto Power Path Management

Richtek Technology 

RT9519A

RT9519A Operation State Digram for Charging

Sleep State

VIN – VBAT Yes

> VOS_H

Pre-Charge State

ICHG_PRE =

10% x ICHG_FAST

VBAT > 3V Yes

No

No

Yes Time > tFCHG

Standby State

Yes

No

VUVLO< VIN < VOVP

& EN = L

&USUS = L

Charger

Disable

Any State

or VIN < VUVLO,

or VIN > VOVP,

Or VIN - VBAT < VOS_H

or USUS = H

or EN = H

No

Time > tPCHG

Yes

No

Timer-Out State

CHG = flash 2Hz

& ICHG to 1mA

Re-Charge State

CHG = High

impedance

Yes

If VSET = H

Check VBAT < 4.1V

If VSET = L

Check VBAT < 3.95V

No

Fast-Charge State

If ISET = H

ICHG_FAST = (VISETA / RISETA) x 300

If ISET = L

ICHG_FAST = (VISETA / RISETA) x 150

If VSET = H

Check VBAT > 4.1V

No

If VSET = L

Check VBAT > 3.95V

Yes

If

ISETL = H & ISETU = H

ISETL = L & ISETU = X

Check ICHG < 10% x ICHG_FAST

If ISETL = H & ISETU = L

Check ICHG < 3.3% x ICHG_FAST

Yes

Time > tTERMI = 25msec

Yes

Charge Done State

CHG = High impedance

& ICHG = 0A

Operation State Digram for TS PIN

Any State

60% x VVP < VTS < 2.85V

Or VTS < 37.5% x VVP

Yes

TS fault State

ICHG = 0A

Keep CHG state

No

No

VTS > 2.85V

Yes

Battery Remove State

ICHG = 0A

CHG = High impedance

Reset timer and CHG

DS9519A-02 April 2011

www.richtek.com

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