RT9519A RICHTEK [Richtek Technology Corporation], RT9519A Datasheet - Page 15

• Manufacturer Part Number: RT9519A
• Description: Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9519A Operation State Digram for Charging
Operation State Digram for TS PIN
DS9519A-02 April 2011
No
Sleep State
Or V
V
UVLO
or V
or V
Standby State
IN
or USUS = H
&USUS = L
or EN = H
Any State
Yes
& EN = L
Charger
- V
Disable
IN
< V
IN
BAT
< V
> V
IN
UVLO
< V
OVP
< V
V
OVP
OS_H
,
IN
> V
,
– V
OS_H
BAT
Yes
60% x V
Pre-Charge State
10% x I
Or VTS < 37.5% x V
TS fault State
I
Keep CHG state
I
CHG
CHG_PRE
No
CHG_FAST
Any State
VP
= 0A
Time > t
< V
=
Yes
Yes
TS
Check V
Check V
CHG = flash 2Hz
< 2.85V
Re-Charge State
Timer-Out State
PCHG
& I
CHG = High
If VSET = H
If VSET = L
impedance
CHG to 1mA
VP
BAT
BAT
No
Yes
V
< 3.95V
BAT
< 4.1V
No
No
> 3V
Yes
Battery Remove State
I
CHG = High impedance
Reset timer and CHG
CHG
Time > t
Yes
= 0A
No
No
V
TS
Yes
No
FCHG
> 2.85V
I
I
CHG_FAST
CHG_FAST
Check I
Check I
If
If ISETL = H & ISETU = L
Time > t
ISETL = L & ISETU = X
ISETL = H & ISETU = H
CHG = High impedance
Check V
Fast-Charge State
Check V
Charge Done State
CHG
CHG
= (V
= (V
If ISET = H
If ISET = L
If VSET = H
If VSET = L
& I
Yes
Yes
Yes
TERMI
< 3.3% x I
ISETA
ISETA
< 10% x I
CHG
BAT
BAT
= 0A
RT9519A
/ R
/ R
= 25msec
> 3.95V
> 4.1V
ISETA
ISETA
CHG_FAST
CHG_FAST
www.richtek.com
) x 300
) x 150
No
15